Fair Value Measurements Non-Recurring Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis
Held and used, Total losses	$ 4,343	$ 3,413
Held for sale, Total losses	354	684
Impairment of long-lived assets	4,697	4,097	$ 16,241
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis
Assets Held and Used, Long Lived, Fair Value Disclosure	462	757
Assets Held-for-sale, Long Lived, Fair Value Disclosure	1,031	1,560
Total	1,493	2,317
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis
Assets Held and Used, Long Lived, Fair Value Disclosure	0	0
Assets Held-for-sale, Long Lived, Fair Value Disclosure	0	0
Total	0	0
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis
Assets Held and Used, Long Lived, Fair Value Disclosure	0	0
Assets Held-for-sale, Long Lived, Fair Value Disclosure	0	0
Total	0	0
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis
Assets Held and Used, Long Lived, Fair Value Disclosure	462	757
Assets Held-for-sale, Long Lived, Fair Value Disclosure	1,031	1,560
Total	$ 1,493	$ 2,317