Debt - Schedule of Notes (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Debt Issuance Cost
Amortization of debt discount and debt issuance costs	$ 411	$ 308
Senior Notes
2025 Senior Notes
Beginning balance	200,000
Ending balance	200,000
Discount
Beginning balance	(46,774)
Amortization of debt discount and debt issuance costs	3,497
Ending balance	(43,277)
Debt Issuance Cost
Beginning balance	(5,086)
Amortization of debt discount and debt issuance costs	381
Ending balance	(4,705)
Total
Beginning balance	148,140
Amortization of debt discount and debt issuance costs	3,878
Ending balance	$ 152,018