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Income Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Net income $ 2,993 $ 2,145 $ 7,881 $ 1,369
Net income (loss) allocated to participating securities (58) (44) (152) (31)
Net income allocated to common shareholders $ 2,935 $ 2,101 $ 7,729 $ 1,338
Basic weighted-average common shares outstanding 32,151 27,823 31,731 27,687
Basic income per common share $ 0.09 $ 0.08 $ 0.24 $ 0.05
Net income (loss) allocated to participating securities, diluted $ (56) $ (44) $ (148) $ (32)
Net income allocated to common shareholders, diluted $ 2,937 $ 2,101 $ 7,733 $ 1,337
Effect of dilutive stock options and awards [1] 1,014 773 837 800
Diluted weighted-average common shares outstanding 33,165 28,596 32,568 28,487
Diluted income per common share $ 0.09 $ 0.07 $ 0.24 $ 0.05
Stock Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share 1 714 810 787
[1] The Company excluded stock options from the calculation of diluted weighted-average common shares outstanding if the per share value, including the sum of (i) the exercise price of the options and (ii) the amount of the compensation cost attributed to future services and not yet recognized, was greater than the average market price of the shares because the inclusion of these stock options would be antidilutive to income per common share. The Company also excluded common stock equivalents from stock awards from the calculation of diluted weighted-average common shares outstanding during periods of net losses because the inclusion of these common stock equivalents would be antidilutive to income per common share. Accordingly, stock options to purchase a weighted-average 1,000 and 810,000 shares for the three and nine months ended September 30, 2016, respectively, and 714,000 and 787,000 shares for the three and nine months ended September 30, 2015, respectively, were excluded from the calculation of diluted weighted-average common shares outstanding.