Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Earnings Per Share (Details)

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Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Accounting Policies [Abstract]        
Net income (loss) $ 1,991 $ 2,719 $ (2,197) $ (5,562)
Basic weighted-average shares outstanding 46,493,162 46,064,049 46,450,877 45,987,447
Effect of dilutive securities:        
Stock options 540,921 509,642 0 0
Diluted weighted-average shares outstanding 47,034,083 46,573,691 46,450,877 45,987,447
Antidilutive securities, amount 1,705,470 1,811,928 2,594,112 1,781,928