Leases - Lease Balances (Details) - USD ($) $ in Thousands	Jun. 29, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Right-of-use assets	$ 44,176	$ 46,162	$ 0
Short-term lease liability	8,820	8,892
Long-term lease liability	40,612	$ 42,639	$ 0
Total liability	$ 49,432