Basis of Presentation - Recently Adopted Accounting Standards (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
	Jan. 01, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Balance Sheet line item:
Long-term debt		$ 254,055		$ 254,055		$ 229,438
Additional paid-in capital		1,065,590		1,065,590		1,116,921
Accumulated deficit		$ (645,757)		$ (645,757)		(681,283)
Income per common share:
Basic income per common share (in dollars per share)		$ 0.19	$ 0.13	$ 0.46	$ 0.18
Diluted earnings per share (in dollars per share)		0.18	$ 0.12	0.43	$ 0.17
ASU 2020-06: Debt
Accounting Changes
Change in Accounting Principle, Accounting Standards Update, Adopted	true
Change in Accounting Principle, Accounting Standards Update, Transition Option Elected	us-gaap:AccountingStandardsUpdate202006CumulativeEffectPeriodOfAdoptionMember
ASU 2020-06: Debt | Cumulative Effect, Period of Adoption, Adjustment
Balance Sheet line item:
Long-term debt						44,260
Additional paid-in capital						(56,801)
Accumulated deficit						12,541
ASU 2020-06: Debt | Cumulative Effect, Period of Adoption, Adjusted Balance
Balance Sheet line item:
Long-term debt						273,698
Additional paid-in capital						1,060,120
Accumulated deficit						$ (668,742)
Income per common share:
Basic income per common share (in dollars per share)		0.19		0.46
Diluted earnings per share (in dollars per share)		0.18		0.43
Under legacy accounting
Income per common share:
Basic income per common share (in dollars per share)		0.15		0.37
Diluted earnings per share (in dollars per share)		0.14		0.33
Difference between adoption of ASU 2020-06 and legacy accounting | ASU 2020-06: Debt
Income per common share:
Basic income per common share (in dollars per share)		0.04		0.09
Diluted earnings per share (in dollars per share)		$ 0.04		$ 0.10