Fair Value Measurements and Financial Instruments (Details) - Fair value, measurements, recurring [Member] - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 31, 2018
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	$ 10,302	$ 15,379
Defined benefit pension plan assets	0	0
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
Defined benefit pension plan assets	3,145	3,758
Deferred compensation	2,746	2,459
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
Defined benefit pension plan assets	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	10,302	15,379
Defined benefit pension plan assets	3,145	3,758
Deferred compensation	$ 2,746	$ 2,459