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Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Basic Net Earnings Per Common Share [Abstract]
Earnings from continuing operations	$ 22,164	$ 9,621
Loss from discontinued operations	(1,164)	(994)
Net earnings available to common stockholders	$ 21,000	$ 8,627
Weighted average common shares outstanding (in shares)	22,317,959	22,438,087
Earnings from continuing operations per common share (in dollars per share)	$ 0.99	$ 0.43
Loss from discontinued operations per common share (in dollars per share)	(0.05)	(0.05)
Net earnings per common share - Basic (in dollars per share)	$ 0.94	$ 0.38
Diluted Net Earnings Per Common Share [Abstract]
Earnings from continuing operations	$ 22,164	$ 9,621
Loss from discontinued operations	(1,164)	(994)
Net earnings available to common stockholders	$ 21,000	$ 8,627
Weighted average common shares outstanding (in shares)	22,317,959	22,438,087
Plus incremental shares from assumed conversions [Abstract]
Dilutive effect of restricted stock and performance stock (in shares)	448,000	431,000
Weighted average common shares outstanding - Diluted (in shares)	22,765,508	22,868,975
Earnings from continuing operations per common share (in dollars per share)	$ 0.97	$ 0.42
Loss from discontinued operations per common share (in dollars per share)	(0.05)	(0.04)
Net earnings per common share - Diluted (in dollars per share)	$ 0.92	$ 0.38
Restricted and Performance Shares [Member]
Earnings Per Share[Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)	272,000	253,000

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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