Fair Value Measurements Non-Recurring Fair Value Measurements (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 30, 2018
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis
Assets Held and Used, Long Lived, Fair Value Disclosure	$ 2,112	$ 462
Assets Held-for-sale, Long Lived, Fair Value Disclosure	1,215	1,031
Total	3,327	1,493
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, 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, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis
Assets Held and Used, Long Lived, Fair Value Disclosure	2,112	462
Assets Held-for-sale, Long Lived, Fair Value Disclosure	1,215	1,031
Total	$ 3,327	$ 1,493