Financial Instruments (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015	Dec. 31, 2015
Derivative [Line Items]
Interest rate cap hedges recognized in other comprehensive income, net of tax	$ 0	$ 0	$ 556,000	$ 0
Other Current Assets
Derivative [Line Items]
Derivative asset	0		0		$ 1,000
Other Long Term Assets
Derivative [Line Items]
Derivative asset	151,000		151,000		962,000
Interest rate cap premiums
Derivative [Line Items]
Interest rate cap hedges recognized in other comprehensive income, net of tax	100,000
Gain (loss) on derivatives, net			0
Cash Flow Hedging | Designated as Hedging Instrument | Interest rate cap premiums | Other Current Assets
Derivative [Line Items]
Derivative asset	0		0		1,000
Cash Flow Hedging | Designated as Hedging Instrument | Interest rate cap premiums | Other Long Term Assets
Derivative [Line Items]
Derivative asset	$ 151,000		$ 151,000		$ 962,000