Quarterly report pursuant to Section 13 or 15(d)

Income Per Share - Calculation (Details)

v3.19.2
Income Per Share - Calculation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Net income - basic and diluted $ 52,051 $ 37,983 $ 27,153 $ 26,388 $ 90,035 $ 53,540
Weighted average number of common shares outstanding - basic 33,976,169   35,102,429   34,072,314 35,081,292
Dilutive effect of common stock equivalents:            
Stock options 250,457   315,340   238,164 330,909
Weighted average number of common shares outstanding - diluted 34,557,664   35,837,102   34,630,048 35,828,290
Basic net income per common share $ 1.53   $ 0.77   $ 2.64 $ 1.53
Diluted net income per common share $ 1.51   $ 0.76   $ 2.60 $ 1.49
Service-based conditions            
Dilutive effect of common stock equivalents:            
Restricted stock awards 84,952   165,951   88,516 174,537
Market-based conditions            
Dilutive effect of common stock equivalents:            
Restricted stock awards 174,840   253,382   177,436 241,552
Performance-based conditions            
Dilutive effect of common stock equivalents:            
Restricted stock awards 71,246       53,618