Earnings Per Share (Details) $ / shares in Units, shares in Thousands, $ in Thousands			3 Months Ended				6 Months Ended
		May 28, 2021	Jun. 30, 2021 USD ($) $ / shares shares	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($) $ / shares shares	Mar. 31, 2020 USD ($)	Jun. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) $ / shares shares
Reconciliation of the component parts of earnings per share [Abstract]
Net income | $			$ 14,433	$ 14,083	$ 11,254	$ 13,313	$ 28,516	$ 24,567
Weighted average common shares (in shares)	[1]		19,281		19,287		19,284	19,316
Stock Options (in shares)	[1]		9		0		8	3
Weighted average common shares including potential dilutive shares (in shares)			19,290		19,287		19,292	19,319
Basic EPS (in dollars per share) | $ / shares	[1],[2]		$ 0.749		$ 0.584		$ 1.479	$ 1.272
Diluted EPS (in dollars per share) | $ / shares	[1],[2]		$ 0.748		$ 0.584		$ 1.478	$ 1.272
Reverse stock split ratio		0.2
Stock Options [Member]
Antidilutive Securities [Abstract]
Number of anti-dilutive stock options excluded from diluted earnings per share (in shares)			0		90		0	90

[1] Share and per share amounts have been adjusted for all periods presented for the 1 for 5 reverse stock split which occurred on May 28, 2021.

[2] All periods presented have been adjusted for the 1 for 5 reverse stock split which occurred on May 28, 2021