Quarterly report pursuant to Section 13 or 15(d)

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

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Fair Value Measurements - Summary of Changes in Fair Value of Level 3 Financial Instruments (Details) - Level 3 - USD ($)
$ in Thousands
3 Months Ended
Dec. 30, 2017
Dec. 24, 2016
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 (860)
Changes in the fair value of contingent performance-based payments established at the time of acquisition (192) 0
Performance-based payments (93)  
Ending balance $ 9,058 $ 4,253