Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Fair Value Measurements - Summary of Changes in Fair Value of Level 3 Financial Instruments (Details) - Level 3 - USD ($)
$ in Thousands
9 Months Ended
Jun. 30, 2018
Jun. 24, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 9,343 $ 5,113
Estimated contingent performance-based consideration established at the time of acquisition 0 0
Changes in the fair value of contingent performance-based payments established at the time of acquisition (1,494) 204
Performance-based payments (204) (1,222)
Ending balance $ 7,645 $ 4,095