Net Income (Loss) Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Number of outstanding units not included in computation of Diluted EPS (in shares)	203,000		850,000		1,461,000	526,000
Numerator:
Net income (loss)	$ 15,419	$ (22,071)	$ 53,951	$ 17,734	$ (6,652)	$ 71,685
Denominator:
Basic earnings per share weighted average shares	43,837,000		50,522,000		46,614,000	50,501,000
Dilutive effect of employee stock awards and warrants	382,000		44,000			136,000
Diluted earnings per share weighted average shares	44,219,000		50,566,000		46,614,000	50,637,000
Basic earnings (loss) per share (in dollars per share)	$ 0.35		$ 1.07		$ (0.14)	$ 1.42
Diluted earnings (loss) per share (in dollars per share)	$ 0.35		$ 1.07		$ (0.14)	$ 1.42
Performance Share Units (PSUs)
Number of outstanding units not included in computation of Diluted EPS (in shares)					538,000	350,000