Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Basic:
Net income	$ 7,071	$ 7,545
Weighted-average common shares outstanding	14,312,260	14,422,813
Basic earnings per share	$ 0.49	$ 0.52
Diluted:
Net Income	$ 7,071	$ 7,545
Weighted-average common shares outstanding	14,312,260	14,422,813
Effect of dilutive restricted stock and stock appreciation rights	220,809	207,700
Weighted-average common shares outstanding assuming dilution	14,533,069	14,630,513
Diluted earnings per share	$ 0.49	$ 0.52