Fair Value Measurements and Financial Instruments (Details) - Fair value, measurements, recurring [Member] - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
Quoted prices in active markets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets invested for self-insurance, classified as other assets, noncurrent	$ 16,933	$ 15,492
Deferred compensation	0	0
Significant other observable inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets invested for self-insurance, classified as other assets, noncurrent	0	0
Deferred compensation	1,985	1,837
Significant unobservable inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets invested for self-insurance, classified as other assets, noncurrent	0	0
Deferred compensation	0	0
Total carrying value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets invested for self-insurance, classified as other assets, noncurrent	16,933	15,492
Deferred compensation	$ 1,985	$ 1,837