Consolidating Condensed Financial Information of Guarantor Subsidiaries - Consolidating Condensed Statement of Cash Flows (Detail) - USD ($)
$ in Thousands |
12 Months Ended |
Sep. 24, 2016 |
Sep. 26, 2015 |
Sep. 27, 2014 |
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
| Net cash provided by operating activities |
$ 151,426
|
$ 87,449
|
$ 126,467
|
| Additions to property, plant and equipment |
(27,622)
|
(22,030)
|
(17,173)
|
| Payments to acquire companies, net of expenses |
(69,001)
|
(38,384)
|
(20,282)
|
| Proceeds from disposal of land, buildings, etc. |
3,911
|
0
|
8,737
|
| Change in restricted cash and cash equivalents. |
2,247
|
1,126
|
(14,283)
|
| Maturities of short term investments |
0
|
9,997
|
17,820
|
| Investment in short-term investments |
0
|
(17)
|
(10,000)
|
| Other investing activities |
(730)
|
(546)
|
0
|
| Intercompany investing activities |
0
|
0
|
0
|
| Net cash used in investing activities |
(91,195)
|
(49,854)
|
(35,181)
|
| Repayments on revolving line of credit |
(419,000)
|
(312,000)
|
(301,000)
|
| Borrowings on revolving line of credit |
419,000
|
312,000
|
278,000
|
| Repayments of long-term debt |
(400,307)
|
(50,289)
|
(367)
|
| Issuance of long-term debt |
400,000
|
0
|
0
|
| Proceeds from issuance of common stock |
324
|
200
|
1,165
|
| Excess tax benefits from stock-based awards |
6,869
|
2,154
|
498
|
| Repurchase of common stock |
(10,873)
|
(18,497)
|
(2,332)
|
| Payments of contingent consideration |
(2,026)
|
0
|
0
|
| Payment of deferred financing costs |
(7,560)
|
(258)
|
(3,090)
|
| Distribution to parent |
0
|
0
|
0
|
| Distribution to noncontrolling interest |
(592)
|
(1,680)
|
(633)
|
| Intercompany financing activities |
0
|
0
|
0
|
| Net cash used by financing activities |
(14,165)
|
(68,370)
|
(27,759)
|
| Effect of exchange rates on cash |
(668)
|
(317)
|
(7)
|
| Net increase (decrease) in cash and cash equivalents |
45,398
|
(31,092)
|
63,520
|
| Cash and cash equivalents at beginning of year |
47,584
|
78,676
|
15,156
|
| Cash and cash equivalents at end of year |
92,982
|
47,584
|
78,676
|
| Eliminations [Member] |
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
| Net cash provided by operating activities |
(4,883)
|
(6,719)
|
(2,534)
|
| Additions to property, plant and equipment |
0
|
0
|
0
|
| Payments to acquire companies, net of expenses |
0
|
0
|
0
|
| Proceeds from disposal of land, buildings, etc. |
0
|
|
0
|
| Change in restricted cash and cash equivalents. |
0
|
0
|
0
|
| Maturities of short term investments |
0
|
0
|
0
|
| Investment in short-term investments |
0
|
0
|
0
|
| Other investing activities |
0
|
0
|
|
| Intercompany investing activities |
130,183
|
101,752
|
111,652
|
| Net cash used in investing activities |
130,183
|
101,752
|
111,652
|
| 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
|
0
|
| Excess tax benefits from stock-based awards |
0
|
0
|
0
|
| Repurchase of common stock |
0
|
0
|
0
|
| Payments of contingent consideration |
|
|
|
| Payment of deferred financing costs |
0
|
0
|
0
|
| Distribution to parent |
4,883
|
6,719
|
2,534
|
| Distribution to noncontrolling interest |
0
|
0
|
0
|
| Intercompany financing activities |
(130,183)
|
(101,752)
|
(111,652)
|
| Net cash used by financing activities |
(125,300)
|
(95,033)
|
(109,118)
|
| Effect of exchange rates on cash |
0
|
0
|
0
|
| Net increase (decrease) 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 [Member] |
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
| Net cash provided by operating activities |
3,514
|
(16,823)
|
(4,139)
|
| Additions to property, plant and equipment |
(4,513)
|
(2,721)
|
(6,721)
|
| Payments to acquire companies, net of expenses |
(69,001)
|
(38,384)
|
0
|
| Proceeds from disposal of land, buildings, etc. |
0
|
|
0
|
| Change in restricted cash and cash equivalents. |
2,247
|
1,126
|
(14,283)
|
| Maturities of short term investments |
0
|
9,997
|
17,820
|
| Investment in short-term investments |
0
|
(17)
|
(10,000)
|
| Other investing activities |
(730)
|
(546)
|
|
| Intercompany investing activities |
(83)
|
(15,789)
|
(6,726)
|
| Net cash used in investing activities |
(72,080)
|
(46,334)
|
(19,910)
|
| Repayments on revolving line of credit |
(419,000)
|
(312,000)
|
(301,000)
|
| Borrowings on revolving line of credit |
419,000
|
312,000
|
278,000
|
| Repayments of long-term debt |
(400,286)
|
(50,262)
|
(243)
|
| Issuance of long-term debt |
400,000
|
|
|
| Proceeds from issuance of common stock |
324
|
200
|
1,165
|
| Excess tax benefits from stock-based awards |
6,869
|
2,154
|
498
|
| Repurchase of common stock |
(10,873)
|
(18,497)
|
(2,332)
|
| Payments of contingent consideration |
|
|
|
| Payment of deferred financing costs |
(7,560)
|
(258)
|
(3,090)
|
| Distribution to parent |
0
|
0
|
0
|
| Distribution to noncontrolling interest |
0
|
0
|
0
|
| Intercompany financing activities |
127,436
|
103,326
|
109,057
|
| Net cash used by financing activities |
115,910
|
36,663
|
82,055
|
| Effect of exchange rates on cash |
(1,466)
|
(697)
|
27
|
| Net increase (decrease) in cash and cash equivalents |
45,878
|
(27,191)
|
58,033
|
| Cash and cash equivalents at beginning of year |
36,280
|
63,471
|
5,438
|
| Cash and cash equivalents at end of year |
82,158
|
36,280
|
63,471
|
| Non-Guarantor Subsidiaries [Member] |
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
| Net cash provided by operating activities |
2,654
|
7,372
|
7,420
|
| Additions to property, plant and equipment |
(717)
|
(405)
|
(1,027)
|
| Payments to acquire companies, net of expenses |
0
|
0
|
0
|
| Proceeds from disposal of land, buildings, etc. |
0
|
|
0
|
| Change in restricted cash and cash equivalents. |
0
|
0
|
0
|
| Maturities of short term investments |
0
|
0
|
0
|
| Investment in short-term investments |
0
|
0
|
0
|
| Other investing activities |
0
|
0
|
|
| Intercompany investing activities |
0
|
0
|
0
|
| Net cash used in investing activities |
(717)
|
(405)
|
(1,027)
|
| 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
|
0
|
| Excess tax benefits from stock-based awards |
0
|
0
|
0
|
| Repurchase of common stock |
0
|
0
|
0
|
| Payments of contingent consideration |
|
|
|
| Payment of deferred financing costs |
0
|
0
|
0
|
| Distribution to parent |
(4,883)
|
(6,719)
|
(2,534)
|
| Distribution to noncontrolling interest |
(592)
|
(1,680)
|
(633)
|
| Intercompany financing activities |
2,747
|
(1,574)
|
2,595
|
| Net cash used by financing activities |
(2,728)
|
(9,973)
|
(572)
|
| Effect of exchange rates on cash |
464
|
222
|
(18)
|
| Net increase (decrease) in cash and cash equivalents |
(327)
|
(2,784)
|
5,803
|
| Cash and cash equivalents at beginning of year |
10,022
|
12,806
|
7,003
|
| Cash and cash equivalents at end of year |
9,695
|
10,022
|
12,806
|
| Guarantor Subsidiaries [Member] |
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
| Net cash provided by operating activities |
150,141
|
103,619
|
125,720
|
| Additions to property, plant and equipment |
(22,392)
|
(18,904)
|
(9,425)
|
| Payments to acquire companies, net of expenses |
0
|
0
|
(20,282)
|
| Proceeds from disposal of land, buildings, etc. |
3,911
|
|
8,737
|
| Change in restricted cash and cash equivalents. |
0
|
0
|
0
|
| Maturities of short term investments |
0
|
0
|
0
|
| Investment in short-term investments |
0
|
0
|
0
|
| Other investing activities |
0
|
0
|
|
| Intercompany investing activities |
(130,100)
|
(85,963)
|
(104,926)
|
| Net cash used in investing activities |
(148,581)
|
(104,867)
|
(125,896)
|
| Repayments on revolving line of credit |
0
|
0
|
0
|
| Borrowings on revolving line of credit |
0
|
0
|
0
|
| Repayments of long-term debt |
(21)
|
(27)
|
(124)
|
| Issuance of long-term debt |
|
|
|
| Proceeds from issuance of common stock |
0
|
0
|
0
|
| Excess tax benefits from stock-based awards |
0
|
0
|
0
|
| Repurchase of common stock |
0
|
0
|
0
|
| Payments of contingent consideration |
(2,026)
|
|
|
| Payment of deferred financing costs |
0
|
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 |
(2,047)
|
(27)
|
(124)
|
| Effect of exchange rates on cash |
334
|
158
|
(16)
|
| Net increase (decrease) in cash and cash equivalents |
(153)
|
(1,117)
|
(316)
|
| Cash and cash equivalents at beginning of year |
1,282
|
2,399
|
2,715
|
| Cash and cash equivalents at end of year |
$ 1,129
|
$ 1,282
|
$ 2,399
|