Net Income per Share of Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Numerator for earnings per share:
Net income (loss) that is available to common shareholders	$ (6,570)	$ 718
Denominator for basic earnings per share:
Weighted average shares outstanding	21,938,735	21,850,171
Denominator for diluted earnings per share:
Effect of stock options and restricted stock units	0	150,847
Adjusted weighted average shares and assumed conversions	21,938,735	22,001,018
Basic earnings (loss) per share	$ (0.30)	$ 0.03
Diluted earnings (loss) per share	$ (0.30)	$ 0.03
Net loss position (excluded from denominator)
Shares excluded from diluted earnings per share due to:
Antidilutive securities excluded from diluted earnings per share	153,750	0
Inclusion would have been anti-dilutive (excluded from calculation)
Shares excluded from diluted earnings per share due to:
Antidilutive securities excluded from diluted earnings per share	615,587	616,642

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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