Long-Term Debt (Debt Schedule) (Details) - USD ($)	Apr. 01, 2017	Dec. 31, 2016	Mar. 10, 2015
Debt Instrument [Line Items]
Principal amount	$ 331,441,000
Line of Credit | Term Loan
Debt Instrument [Line Items]
Principal amount	331,441,000	$ 342,221,000	$ 350,000,000
Unamortized original issue discount and debt costs	(6,666,000)	(7,599,000)	$ (3,500,000)
Less: Current portion of long-term debt	(23,154,000)	(33,767,000)
Long-term debt	$ 301,621,000	$ 300,855,000