Leases - Future Minimum Lease Payment Obligations Under Operating and Capital Leases (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Capital Leases
2019	$ 6,884
2020	6,819
2021	6,921
2022	7,072
2023	7,225
Thereafter	9,127
Total minimum lease payments	44,048
Less: Amount representing interest	4,084
Total present value of minimum payments	39,964
Less: Current portion of such obligations	5,845
Long-term capital lease obligations	34,119
Operating Leases
2019	15,800
2020	14,519
2021	12,883
2022	12,454
2023	9,945
Thereafter	20,573
Total minimum lease payments	$ 86,174