Fair Value Measurements - Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - Unobservable Inputs (Level 3) - Fair Value, Measurements, Recurring $ in Thousands	3 Months Ended
	Apr. 01, 2018 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 3,557
Ending balance	3,115
Fair value adjustment to Manatee contingent consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value adjustment to contingent consideration	(675)
Fair value adjustment to Chiaro contingent consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value adjustment to contingent consideration	52
Fair value adjustment to GVi contingent consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value adjustment to contingent consideration	$ 181