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Basis of Presentation - Reconciliation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Weighted average basic shares outstanding (in shares)	13,363	13,525
Potentially dilutive common shares related to:
Stock options (in shares)	81	106
Unvested restricted stock awards (in shares)	25	25
Weighted average diluted shares outstanding (in shares)	13,469	13,656
Net income	$ 8,947	$ 7,228
Basic EPS (in dollars per share)	$ 0.67	$ 0.53
Diluted EPS (in dollars per share)	$ 0.66	$ 0.53
Weighted average anti-dilutive shares not included in the calculation of diluted EPS (in shares)	80	70

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