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, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Basic:
Net income	$ 19,951	$ 14,162	$ 26,576	$ 19,268	$ 34,113	$ 45,844
Less: Distributed earnings to common shareholders	13,489		12,366		26,974	24,727
Less: Distributed earnings to participating securities	36		35		67	65
Undistributed earnings	6,426		14,175		7,072	21,052
Undistributed earnings allocated to common shareholders	6,409		14,135		7,055	20,997
Undistributed earnings allocated to participating securities	17		40		17	55
Common shareholders earnings, basic	$ 19,898		$ 26,501		$ 34,029	$ 45,724
Weighted average Common Shares outstanding, basic (in shares)	36,956		36,916		36,950	36,907
Basic earnings per Common Share (in dollars per share)	$ 0.54		$ 0.72		$ 0.92	$ 1.24
Diluted:
Common shareholders earnings, basic	$ 19,898		$ 26,501		$ 34,029	$ 45,724
Undistributed earnings for dilutive stock-based awards	17		40		17	55
Total common shareholders earnings, diluted	$ 19,915		$ 26,541		$ 34,046	$ 45,779
Weighted average Common Shares outstanding, basic (in shares)	36,956		36,916		36,950	36,907
Stock-based compensation (in shares)	83		91		79	86
Weighted Average Number of Diluted Shares (in shares)	37,039		37,007		37,029	36,993
Diluted earnings per Common Share (in dollars per share)	$ 0.54		$ 0.72		$ 0.92	$ 1.24