XML 64 R52.htm IDEA: XBRL DOCUMENT v3.10.0.1
Net Income per Common Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Basic:        
Net income $ 37,296 $ 27,772 $ 73,011 $ 54,789
Average common shares outstanding (in shares) 34,306 34,129 34,283 34,099
Basic net income per common share (in dollars per share) $ 1.09 $ 0.81 $ 2.13 $ 1.61
Diluted:        
Net income $ 37,296 $ 27,772 $ 73,011 $ 54,789
Average common shares outstanding (in shares) 34,306 34,129 34,283 34,099
Adjustment for common share equivalents (in shares) 142 195 145 205
Average common shares outstanding-diluted (in shares) 34,448 34,324 34,428 34,304
Diluted net income per common share (in dollars per share) $ 1.08 $ 0.81 $ 2.12 $ 1.6
Anti-dilutive shares (in shares)   7   7