Leases - Lease Maturities (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
2019 (remaining)	$ 24,871
2020	23,041
2021	17,174
2022	10,334
2023 (and thereafter)	17,056
Total future minimum lease payments	92,476
Less imputed interest	(6,037)
Total	$ 86,439