Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Operating Leases
2019 (excluding the six months ended June 30, 2019)	$ 9,010
2020	16,955
2021	16,069
2022	14,728
2023	14,622
Thereafter	32,422
Total lease payments	103,806
Less imputed interest	(21,773)
Total	82,033
Finance Leases
2019 (excluding the six months ended June 30, 2019)	4,218
2020	5,517
2021	719
2022	261
2023	1
Thereafter	0
Total lease payments	10,716
Less imputed interest	(335)
Total	$ 10,381