Debt - Schedule of Debt and Future Minimum Lease Payments on Finance Lease Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
2019	$ 2,316
2020	519,666
2021	3,266
2022	3,367
2023	3,761
Thereafter	12,014
Total future payments	544,390
Less interest component	3,515
Total debt and finance lease obligations	540,875
Current portion of debt and finance lease obligations	2,339	$ 2,296
Long-term portion	538,536
Debt [Member]
Debt Instrument [Line Items]
2020	516,500
Total future payments	516,500
Total debt and finance lease obligations	516,500
Long-term portion	516,500
Finance Lease Obligations [Member]
Debt Instrument [Line Items]
2019	2,316
2020	3,166
2021	3,266
2022	3,367
2023	3,761
Thereafter	12,014
Total future payments	27,890
Less interest component	3,515
Total debt and finance lease obligations	24,375
Current portion of debt and finance lease obligations	2,339
Long-term portion	$ 22,036