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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		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Weighted average basic shares outstanding (in shares)	13,514	13,655	13,519	13,696
Potentially dilutive common shares related to:
Stock options (in shares)	54	142	80	149
Unvested restricted stock awards (in shares)	17	21	22	26
Weighted average diluted shares outstanding (in shares)	13,585	13,818	13,621	13,871
Net income	$ 7,406	$ 8,235	$ 14,634	$ 15,714
Basic EPS (in dollars per share)	$ 0.55	$ 0.60	$ 1.08	$ 1.15
Diluted EPS (in dollars per share)	$ 0.55	$ 0.60	$ 1.07	$ 1.13
Weighted average anti-dilutive shares not included in the calculation of diluted EPS (in shares)	207	44	109	30

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