Consolidating Condensed Financial Information of Guarantor Subsidiaries - Consolidating Condensed Statement of Cash Flows (Detail) - USD ($)
$ in Thousands |
12 Months Ended |
Sep. 30, 2017 |
Sep. 24, 2016 |
Sep. 26, 2015 |
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
| Net cash provided (used) by operating activities |
$ 114,309
|
$ 151,426
|
$ 87,449
|
| Additions to property, plant and equipment |
(44,659)
|
(27,622)
|
(22,030)
|
| Businesses acquired, net of cash acquired, and investments in joint ventures |
(103,880)
|
(69,001)
|
(38,384)
|
| Proceeds from asset sales |
8,547
|
3,911
|
0
|
| Escrow deposit for acquisition-related contingent consideration |
6,000
|
|
|
| Change in restricted cash and cash equivalents. |
(1,735)
|
2,247
|
1,126
|
| Investment in equity method investees |
(12,495)
|
0
|
0
|
| Maturities of short term investments |
0
|
0
|
9,997
|
| Investment in short-term investments |
0
|
0
|
(17)
|
| Other investing activities |
(4,355)
|
(730)
|
(546)
|
| Intercompany investing activities |
0
|
0
|
0
|
| Net cash used in investing activities |
(164,577)
|
(91,195)
|
(49,854)
|
| Repayments on revolving line of credit |
(552,000)
|
(419,000)
|
(312,000)
|
| Borrowings on revolving line of credit |
552,000
|
419,000
|
312,000
|
| Repayments of long-term debt |
(463)
|
(400,307)
|
(50,289)
|
| Issuance of long-term debt |
0
|
400,000
|
0
|
| Proceeds from issuance of common stock |
0
|
324
|
200
|
| Excess tax benefits from stock-based awards |
19,946
|
6,869
|
2,154
|
| Repurchase of common stock |
(27,556)
|
(10,873)
|
(18,497)
|
| Payments of contingent consideration |
(1,300)
|
(2,026)
|
0
|
| Payment of deferred financing costs |
0
|
(7,560)
|
(258)
|
| Distribution to parent |
0
|
0
|
0
|
| Distribution to noncontrolling interest |
(1,019)
|
(592)
|
(1,680)
|
| Intercompany financing activities |
0
|
0
|
0
|
| Net cash used by financing activities |
(10,392)
|
(14,165)
|
(68,370)
|
| Effect of exchange rates on cash |
75
|
(668)
|
(317)
|
| Net (decrease) increase in cash and cash equivalents |
(60,585)
|
45,398
|
(31,092)
|
| Cash and cash equivalents at beginning of year |
92,982
|
47,584
|
78,676
|
| Cash and cash equivalents at end of year |
32,397
|
92,982
|
47,584
|
| Eliminations |
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
| Net cash provided (used) by operating activities |
(4,076)
|
(4,883)
|
(6,719)
|
| Additions to property, plant and equipment |
0
|
0
|
0
|
| Businesses acquired, net of cash acquired, and investments in joint ventures |
0
|
0
|
0
|
| Proceeds from asset sales |
0
|
0
|
|
| Change in restricted cash and cash equivalents. |
0
|
0
|
0
|
| Maturities of short term investments |
|
|
0
|
| Investment in short-term investments |
|
|
0
|
| Other investing activities |
0
|
0
|
0
|
| Intercompany investing activities |
98,591
|
129,791
|
101,752
|
| Net cash used in investing activities |
98,591
|
129,791
|
101,752
|
| Repayments on revolving line of credit |
0
|
0
|
0
|
| Borrowings on revolving line of credit |
0
|
0
|
0
|
| Repayments of long-term debt |
0
|
0
|
0
|
| Issuance of long-term debt |
|
|
|
| Proceeds from issuance of common stock |
|
0
|
0
|
| Excess tax benefits from stock-based awards |
0
|
0
|
0
|
| Repurchase of common stock |
0
|
0
|
0
|
| Payments of contingent consideration |
0
|
|
|
| Payment of deferred financing costs |
|
0
|
0
|
| Distribution to parent |
4,076
|
4,883
|
6,719
|
| Distribution to noncontrolling interest |
0
|
0
|
0
|
| Intercompany financing activities |
(98,591)
|
(129,791)
|
(101,752)
|
| Net cash used by financing activities |
(94,515)
|
(124,908)
|
(95,033)
|
| Effect of exchange rates on cash |
0
|
0
|
0
|
| Net (decrease) increase in cash and cash equivalents |
0
|
0
|
0
|
| Cash and cash equivalents at beginning of year |
0
|
0
|
0
|
| Cash and cash equivalents at end of year |
0
|
0
|
0
|
| Parent | Reportable Legal Entities |
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
| Net cash provided (used) by operating activities |
(7,418)
|
3,906
|
(16,823)
|
| Additions to property, plant and equipment |
(9,419)
|
(4,513)
|
(2,721)
|
| Businesses acquired, net of cash acquired, and investments in joint ventures |
(103,880)
|
(69,001)
|
(38,384)
|
| Proceeds from asset sales |
229
|
0
|
|
| Escrow deposit for acquisition-related contingent consideration |
6,000
|
|
|
| Change in restricted cash and cash equivalents. |
(1,735)
|
2,247
|
1,126
|
| Investment in equity method investees |
(12,495)
|
|
|
| Maturities of short term investments |
|
|
9,997
|
| Investment in short-term investments |
|
|
(17)
|
| Other investing activities |
(4,355)
|
(730)
|
(546)
|
| Intercompany investing activities |
(3,828)
|
(83)
|
(15,789)
|
| Net cash used in investing activities |
(141,483)
|
(72,080)
|
(46,334)
|
| Repayments on revolving line of credit |
(552,000)
|
(419,000)
|
(312,000)
|
| Borrowings on revolving line of credit |
552,000
|
419,000
|
312,000
|
| Repayments of long-term debt |
(89)
|
(400,286)
|
(50,262)
|
| Issuance of long-term debt |
|
400,000
|
|
| Proceeds from issuance of common stock |
|
324
|
200
|
| Excess tax benefits from stock-based awards |
19,946
|
6,869
|
2,154
|
| Repurchase of common stock |
(27,556)
|
(10,873)
|
(18,497)
|
| Payments of contingent consideration |
0
|
|
|
| Payment of deferred financing costs |
|
(7,560)
|
(258)
|
| Distribution to parent |
0
|
0
|
0
|
| Distribution to noncontrolling interest |
0
|
0
|
0
|
| Intercompany financing activities |
93,445
|
127,044
|
103,326
|
| Net cash used by financing activities |
85,746
|
115,518
|
36,663
|
| Effect of exchange rates on cash |
235
|
(1,466)
|
(697)
|
| Net (decrease) increase in cash and cash equivalents |
(62,920)
|
45,878
|
(27,191)
|
| Cash and cash equivalents at beginning of year |
82,158
|
36,280
|
63,471
|
| Cash and cash equivalents at end of year |
19,238
|
82,158
|
36,280
|
| Non-Guarantor Subsidiaries | Reportable Legal Entities |
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
| Net cash provided (used) by operating activities |
2,846
|
2,654
|
7,372
|
| Additions to property, plant and equipment |
(805)
|
(717)
|
(405)
|
| Businesses acquired, net of cash acquired, and investments in joint ventures |
0
|
0
|
0
|
| Proceeds from asset sales |
0
|
0
|
|
| Change in restricted cash and cash equivalents. |
0
|
0
|
0
|
| Maturities of short term investments |
|
|
0
|
| Investment in short-term investments |
|
|
0
|
| Other investing activities |
0
|
0
|
0
|
| Intercompany investing activities |
0
|
0
|
0
|
| Net cash used in investing activities |
(805)
|
(717)
|
(405)
|
| Repayments on revolving line of credit |
0
|
0
|
0
|
| Borrowings on revolving line of credit |
0
|
0
|
0
|
| Repayments of long-term debt |
0
|
0
|
0
|
| Issuance of long-term debt |
|
|
|
| Proceeds from issuance of common stock |
|
0
|
0
|
| Excess tax benefits from stock-based awards |
0
|
0
|
0
|
| Repurchase of common stock |
0
|
0
|
0
|
| Payments of contingent consideration |
0
|
|
|
| Payment of deferred financing costs |
|
0
|
0
|
| Distribution to parent |
(4,076)
|
(4,883)
|
(6,719)
|
| Distribution to noncontrolling interest |
(1,019)
|
(592)
|
(1,680)
|
| Intercompany financing activities |
5,146
|
2,747
|
(1,574)
|
| Net cash used by financing activities |
51
|
(2,728)
|
(9,973)
|
| Effect of exchange rates on cash |
(94)
|
464
|
222
|
| Net (decrease) increase in cash and cash equivalents |
1,998
|
(327)
|
(2,784)
|
| Cash and cash equivalents at beginning of year |
9,695
|
10,022
|
12,806
|
| Cash and cash equivalents at end of year |
11,693
|
9,695
|
10,022
|
| Guarantor Subsidiaries | Reportable Legal Entities |
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
| Net cash provided (used) by operating activities |
122,957
|
149,749
|
103,619
|
| Additions to property, plant and equipment |
(34,435)
|
(22,392)
|
(18,904)
|
| Businesses acquired, net of cash acquired, and investments in joint ventures |
0
|
0
|
0
|
| Proceeds from asset sales |
8,318
|
3,911
|
|
| Change in restricted cash and cash equivalents. |
0
|
0
|
0
|
| Maturities of short term investments |
|
|
0
|
| Investment in short-term investments |
|
|
0
|
| Other investing activities |
0
|
0
|
0
|
| Intercompany investing activities |
(94,763)
|
(129,708)
|
(85,963)
|
| Net cash used in investing activities |
(120,880)
|
(148,189)
|
(104,867)
|
| Repayments on revolving line of credit |
0
|
0
|
0
|
| Borrowings on revolving line of credit |
0
|
0
|
0
|
| Repayments of long-term debt |
(374)
|
(21)
|
(27)
|
| Issuance of long-term debt |
|
|
|
| Proceeds from issuance of common stock |
|
0
|
0
|
| Excess tax benefits from stock-based awards |
0
|
0
|
0
|
| Repurchase of common stock |
0
|
0
|
0
|
| Payments of contingent consideration |
(1,300)
|
(2,026)
|
|
| Payment of deferred financing costs |
|
0
|
0
|
| Distribution to parent |
0
|
0
|
0
|
| Distribution to noncontrolling interest |
0
|
0
|
0
|
| Intercompany financing activities |
0
|
0
|
0
|
| Net cash used by financing activities |
(1,674)
|
(2,047)
|
(27)
|
| Effect of exchange rates on cash |
(66)
|
334
|
158
|
| Net (decrease) increase in cash and cash equivalents |
337
|
(153)
|
(1,117)
|
| Cash and cash equivalents at beginning of year |
1,129
|
1,282
|
2,399
|
| Cash and cash equivalents at end of year |
$ 1,466
|
$ 1,129
|
$ 1,282
|