Quarterly report pursuant to Section 13 or 15(d)

Earnings per Share - Computation of Earnings Per Share (Details)

v3.10.0.1
Earnings per Share - Computation of Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Numerator—basic and diluted:        
Net income $ 16,432 $ 7,338 $ 41,800 $ 21,608
Denominator:        
Weighted-average common shares - basic common stock 21,324,256 20,753,789 21,175,286 20,622,848
Weighted-average common shares - diluted common stock 22,659,052 21,998,660 22,512,125 21,832,544
Net income per share - basic common stock $ 0.77 $ 0.35 $ 1.97 $ 1.05
Net income per share - diluted common stock $ 0.73 $ 0.33 $ 1.86 $ 0.99
Weighted-average number of shares used in calculating net income per share attributable to common stockholders:        
Weighted-average common shares - basic common stock 21,324,256 20,753,789 21,175,286 20,622,848
Stock options and other dilutive awards 1,334,796 1,244,871 1,336,839 1,209,696
Weighted-average common shares - diluted common stock 22,659,052 21,998,660 22,512,125 21,832,544
Shares excluded from diluted weighted-average shares:        
Shares excluded from diluted weighted-average shares 24,579 154,581 28,737 160,281
Stock options        
Shares excluded from diluted weighted-average shares:        
Shares excluded from diluted weighted-average shares   64,498   64,498
Restricted stock units and restricted stock awards        
Shares excluded from diluted weighted-average shares:        
Shares excluded from diluted weighted-average shares 24,579 90,083 28,737 95,783