Leases - Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Operating Leases
2019 (excluding the nine months ended September 30, 2019)	$ 1,664
2020	5,898
2021	4,388
2022	2,869
2023	2,250
Thereafter	6,006
Total future minimum lease payments	23,075
Less - amount representing interest	2,850
Present value of future minimum lease payments	20,225
Less - current lease obligations	5,408	$ 0
Long-term lease obligations	14,817	0
Finance Leases
2019 (excluding the nine months ended September 30, 2019)	1,241
2020	2,909
2021	2,623
2022	49
2023	41
Thereafter	7
Total future minimum lease payments	6,870
Less - amount representing interest	352
Present value of future minimum lease payments	6,518
Less - current lease obligations	2,909	0
Long-term lease obligations	$ 3,609	$ 0