Earnings Per Share (Computation of Basic and Diluted) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net income (loss)	$ (3,505)	$ 16,600
Denominator:
Weighted-average shares outstanding - basic (in shares)	18,604,000	18,780,000
Effect of dilutive shares (in shares)	0	219,000
Weighted-average shares outstanding - diluted (in shares)	18,604,000	18,999,000
Basic earnings per share (in dollars per share)	$ (0.19)	$ 0.88
Diluted earnings per share (in dollars per share)	$ (0.19)	$ 0.87
Anti-dilutive shares excluded (in shares)	57,000	33,000