Leases - Lease Balances (Details) - USD ($) $ in Thousands	Mar. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Right-of-use assets	$ 43,868	$ 46,162	$ 0
Short-term lease liability	8,567	8,892
Long-term lease liability	40,547	$ 42,639	$ 0
Total liability	$ 49,114