Leases - Maturities of Operating Lease Liabilities - ASC 842 (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Maturities of operating lease liabilities:
Remainder of 2019	$ 8,469
2020	24,803
2021	19,707
2022	15,651
2023	11,721
Thereafter	23,244
Total operating lease payments	103,595
Less: Imputed interest	5,380
Present value of lease liabilities	98,265
Maturities of finance lease liabilities
Remainder of 2019	6,554
2020	14,931
2021	11,587
2022	5,470
2023	2,847
2024 and thereafter	4,120
Total finance lease payments	45,509
Less: imputed interest	6,178
Present value of finance lease liabilities	$ 39,331