Earnings Per Share - Two-class method (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share
Net Income	$ 9,293	$ 11,694	$ 19,477	$ 26,909
Dividends and undistributed earnings allocated to participating securities	101	179	225	432
Net income available to common shareholders	$ 9,192	$ 11,515	$ 19,252	$ 26,477
Weighted-average common shares outstanding for basic earnings per share	17,297	17,194	17,271	17,170
Dilutive effect of stock-based awards	235	303	246	312
Weighted-average common shares outstanding for diluted earnings per share	17,532	17,497	17,517	17,482
Earnings per common share:
Basic earnings per common share	$ 0.53	$ 0.67	$ 1.11	$ 1.54
Diluted earnings per common share	$ 0.52	$ 0.66	$ 1.10	$ 1.52