XML 94 R78.htm IDEA: XBRL DOCUMENT v3.6.0.2
Employee Benefit Plans - Schedule of Non-Vested Stock Awards (Detail) - Non-Vested Stock Awards [Member] - $ / shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Balance, Shares / Units 7,467,065 7,542,096 7,541,509
Granted, Shares / Units 1,496,408 2,195,638 2,118,637
Vested, Shares / Units (3,840,379) (2,033,263) (1,976,587)
Forfeited, Shares / Units (279,821) (237,406) (141,463)
Balance, Shares / Units 4,843,273 7,467,065 7,542,096
Balance, Weighted Average Market Value Per Share $ 29.08 $ 22.53 $ 20.76
Granted, Weighted Average Market Value Per Share 29.24 36.80 30.78
Vested, Weighted Average Market Value Per Share 25.09 21.29 19.02
Forfeited, Weighted Average Market Value Per Share 28.62 26.10 20.15
Balance, Weighted Average Market Value Per Share $ 31.66 $ 29.08 $ 22.53