Leases - Summary of Minimum Future Lease Payments (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Operating leases
2019	$ 10,282
2020	13,261
2021	13,048
2022	13,031
2023	12,553
Thereafter	8,605
Total	70,780
Less: imputed interest	(9,114)
Net lease obligation	61,666
Finance leases
2019	21,381
2020	24,988
2021	22,719
2022	13,707
2023	7,370
Thereafter	1,101
Total	91,266
Less: imputed interest	(15,522)
Net lease obligation	$ 75,744