Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Summary of Changes in Fair Value of Level 3 Financial Instruments (Detail)

v3.10.0.1
Fair Value Measurements - Summary of Changes in Fair Value of Level 3 Financial Instruments (Detail) - Level 3
$ in Thousands
12 Months Ended
Sep. 29, 2018
USD ($)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration [Roll Forward]  
Beginning balance $ 9,343
Estimated contingent performance-based consideration established at the time of acquisition 2,022
Changes in the fair value of contingent performance-based payments (2,888)
Performance-based payments made (253)
Ending balance $ 8,224