Earnings Per Share (Computation of Basic and Diluted) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net income	$ 17,864	$ 17,883	$ 14,359	$ 34,483
Denominator:
Weighted-average shares outstanding - basic (in shares)	18,627,000	18,813,000	18,615,000	18,797,000
Effect of dilutive shares (in shares)	56,000	179,000	44,000	199,000
Weighted-average shares outstanding - diluted (in shares)	18,683,000	18,992,000	18,659,000	18,996,000
Basic earnings per share (in dollars per share)	$ 0.96	$ 0.95	$ 0.77	$ 1.83
Diluted earnings per share (in dollars per share)	$ 0.96	$ 0.94	$ 0.77	$ 1.82
Anti-dilutive shares excluded (in shares)	17,000	0