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Basis of Presentation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Weighted average basic shares outstanding (shares)	6,092	6,048
Add: Potentially dilutive common shares related to stock options (shares)	62	35
Potential common shares related to unvested restricted stock (shares)	18	7
Weighted average diluted shares outstanding (shares)	6,172	6,090
Net income	$ 4,548	$ 5,646	$ 23,134
Basic EPS (usd per share)	$ 0.75	$ 0.93
Diluted EPS (usd per share)	$ 0.74	$ 0.93
Weighted average anti-dilutive shares not included in the calculation of diluted EPS (in shares)	13	48

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