XML 70 R59.htm IDEA: XBRL DOCUMENT v3.8.0.1
Earnings Per Common Share - Computations of Diluted Earnings Per Common Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Earnings Per Share [Abstract]    
Net income available to common equity $ 334,480 $ 330,690
Less: Income attributable to unvested stock-based compensation awards (1,731) (2,123)
Net income available to common shareholders $ 332,749 $ 328,567
Adjusted weighted-average shares outstanding:    
Common and unvested stock-based compensation awards 149,470 155,463
Less: Unvested stock-based compensation awards (782) (1,036)
Plus: Incremental shares from assumed conversion of stock-based compensation awards and warrants to purchase common stock 217 522
Adjusted weighted-average shares outstanding 148,905 154,949
Diluted earnings per common share $ 2.23 $ 2.12