XML 109 R91.htm IDEA: XBRL DOCUMENT v3.6.0.2
Earnings Per Share - Reconciles Numerator and Denominator of Basic and Diluted Earnings Per Share Computations (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Numerator for EPS:                      
Net income $ 13,655 $ 26,882 $ 33,647 $ 25,226 $ 29,152 $ 30,298 $ 24,704 $ 22,330 $ 99,410 $ 106,484 $ 72,988
Less: Preferred stock dividends                 (10) (10) (13)
Income available to common stockholders                 $ 99,400 $ 106,474 $ 72,975
Denominator for EPS:                      
Weighted average common shares outstanding                 34,919 34,799 33,569
Plus: Assumed conversion of share-based compensation                 706 1,056 1,535
Assumed conversion of preferred stock                 25 29 46
Weighted average diluted common shares outstanding                 35,650 35,884 35,150
Basic earnings per common share $ 0.39 $ 0.77 $ 0.96 $ 0.73 $ 0.84 $ 0.87 $ 0.71 $ 0.65 $ 2.85 $ 3.06 $ 2.17
Diluted earnings per common share $ 0.38 $ 0.75 $ 0.94 $ 0.71 $ 0.82 $ 0.84 $ 0.69 $ 0.62 $ 2.79 $ 2.97 $ 2.08
Weighted average number of antidilutive shares                 1,583 311 64