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Basis of Presentation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Weighted average basic shares outstanding (shares)	6,083	5,963	6,070	5,943
Add: Potentially dilutive common shares related to stock options (shares)	27	35	30	41
Potential common shares related to unvested restricted stock (shares)	7	5	6	5
Potential common shares related to warrants (shares)	0	64	0	70
Weighted average diluted shares outstanding (shares)	6,117	6,067	6,106	6,059
Net income	$ 6,964	$ 4,773	$ 17,447	$ 13,516	$ 18,441
Basic EPS (usd per share)	$ 1.14	$ 0.80	$ 2.87	$ 2.27
Diluted EPS (usd per share)	$ 1.14	$ 0.79	$ 2.86	$ 2.23
Weighted average anti-dilutive shares not included in the calculation of diluted EPS (in shares)	71	42	65	35

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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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