Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings
Basic earnings per share	$ 48,492	$ 34,724	$ 16,252	$ 35,043	$ 83,216	$ 51,295
Restricted stock units	0		0		0	0
Restricted stock awards	0		0		0
Performance share units	0		0		0	0
Stock options	0		0		0	0
Diluted earnings per share	$ 48,492		$ 16,252		$ 83,216	$ 51,295
Weighted Average Shares
Basic earnings per share (in shares)	36,699		36,416		36,667	36,187
Restricted stock units (in shares)	339		855		323	1,019
Restricted stock awards (in shares)	34		36		42	39
Performance share units (in shares)	0		0		0	0
Stock options (in shares)	113		38		75	38
Diluted earnings per share (in shares)	37,185		37,345		37,107	37,283
Earnings Per Share
Basic earnings per share (in dollars per share)	$ 1.32		$ 0.45		$ 2.27	$ 1.42
Diluted earnings per share (in dollars per share)	$ 1.30		$ 0.44		$ 2.24	$ 1.38