Leases - Future Minimum Lease Payments (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Operating
2019 (excludes the nine months ended September 30, 2019)	$ 9,930
2020	35,760
2021	27,163
2022	19,958
2023	14,428
Thereafter	24,908
Total future minimum lease payments	132,147
Less: imputed interest	(19,887)
Net future minimum lease payments	112,260	$ 99,800
Finance
2019 (excludes the nine months ended September 30, 2019)	653
2020	1,913
2021	957
2022	957
2023	80
Thereafter	0
Total future minimum lease payments	4,560
Less: imputed interest	(230)
Net future minimum lease payments	$ 4,330