Leases - Maturities of Operating and Financing Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Operating
2019	$ 1,920
2020	7,671
2021	7,285
2022	6,597
2023	2,597
Thereafter	5,751
Total lease payments	31,821
Less: Imputed interest	(7,144)
Present value of lease liabilities	24,677	$ 22,200
Financing
2019	114
2020	387
2021	236
2022	115
2023	53
Thereafter	14
Total lease payments	919
Less: Imputed interest	(80)
Present value of lease liabilities	839
Total
2019	2,034
2020	8,058
2021	7,521
2022	6,712
2023	2,650
Thereafter	5,765
Total lease payments	32,740
Less: Imputed interest	(7,224)
Present value of lease liabilities	$ 25,516