Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Operating Leases
2019 (July 1 - December 31)	$ 12,524
2020	24,997
2021	22,221
2022	20,098
2023	18,000
2024	14,057
2025 and thereafter	23,223
Total lease payments	135,120
Less: Imputed interest	31,150
Lease liabilities	103,970
Finance Leases
2019 (July 1 - December 31)	206
2020	309
2021	215
2022	103
2023	79
2024	9
2025 and thereafter	0
Total lease payments	921
Less: Imputed interest	168
Lease liabilities	$ 753