Leases - Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Operating Leases
2019 (excluding the six months ended June 30, 2019)	$ 3,492
2020	5,932
2021	4,527
2022	2,978
2023	2,385
Thereafter	6,006
Total future minimum lease payments	25,320
Less - amount representing interest	3,158
Present value of future minimum lease payments	22,162
Less - current lease obligations	5,677	$ 0
Long-term lease obligations	16,485	0
Finance Leases
2019 (excluding the six months ended June 30, 2019)	1,749
2020	3,193
2021	3,136
2022	46
2023	42
Thereafter	7
Total future minimum lease payments	8,173
Less - amount representing interest	947
Present value of future minimum lease payments	7,226
Less - current lease obligations	2,935	0
Long-term lease obligations	$ 4,291	$ 0