Earnings per Share/Capital Stock - Schedule of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ 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
Basic:
Net income	$ 38,521	$ 34,407	$ 19,951	$ 14,162	$ 72,928	$ 34,113
Less: Distributed earnings to common shareholders	14,698		13,489		29,394	26,974
Less: Distributed earnings to participating securities	43		36		80	67
Undistributed earnings	23,780		6,426		43,454	7,072
Undistributed earnings allocated to common shareholders	23,711		6,409		43,337	7,055
Undistributed earnings allocated to participating securities	69		17		117	17
Common shareholders earnings, basic	$ 38,409		$ 19,898		$ 72,731	$ 34,029
Weighted average Common Shares outstanding, basic (in shares)	36,976		36,956		36,972	36,950
Basic earnings per Common Share (in dollars per share)	$ 1.04		$ 0.54		$ 1.97	$ 0.92
Diluted:
Common shareholders earnings, basic	$ 38,409		$ 19,898		$ 72,731	$ 34,029
Undistributed earnings for dilutive stock-based awards	69		17		117	17
Total common shareholders earnings, diluted	$ 38,478		$ 19,915		$ 72,848	$ 34,046
Weighted average Common Shares outstanding, basic (in shares)	36,976		36,956		36,972	36,950
Stock-based compensation (in shares)	91		83		86	79
Weighted Average Number of Diluted Shares (in shares)	37,067		37,039		37,058	37,029
Diluted earnings per Common Share (in dollars per share)	$ 1.04		$ 0.54		$ 1.97	$ 0.92