Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings
Basic earnings per share	$ 53,725	$ 48,492	$ 34,724	$ 28,599	$ 16,252	$ 35,043	$ 136,941	$ 79,894
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	$ 53,725			$ 28,599			$ 136,941	$ 79,894
Weighted Average Shares
Basic earnings per share (in shares)	36,797			36,577			36,710	36,318
Restricted stock units (in shares)	263			343			309	787
Restricted stock awards (in shares)	2			28			22	54
Performance share units (in shares)	0			0			0	0
Stock options (in shares)	88			48			80	41
Diluted earnings per share (in shares)	37,150			36,996			37,121	37,200
Earnings Per Share
Basic earnings per share (in dollars per share)	$ 1.46			$ 0.78			$ 3.73	$ 2.20
Diluted earnings per share (in dollars per share)	$ 1.45			$ 0.77			$ 3.69	$ 2.15