Leases Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 27, 2020	Dec. 31, 2019
Leases [Abstract]
Lease liabilities, remainder of fiscal year	$ 5,080
Lease liabilities, year one	19,129	$ 19,086
Lease liabilities, year two	16,220	16,988
Lease liabilities, year three	12,446	14,128
Lease liabilities, year four	9,436	11,598
Lease liabilities, year five		9,032
Lease liabilities, Thereafter	17,433	16,655
Lease liabilities, Total	$ 79,744	$ 87,487