XML 26 R47.htm IDEA: XBRL DOCUMENT v3.2.0.727
Stock-Based Compensation (Detail) - (Table 6) - USD ($)
 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Non-vested at January 1 4,067,000 4,257,000
Non-vested at January 1 (in Dollars per share) $ 24.69 $ 24.24
Granted 246,000 161,000
Granted (in Dollars per share) $ 36.40 $ 35.12
Vested (222,000) (228,000)
Vested (in Dollars per share) $ 22.94 $ 24.28
Forfeited (68,000) (2,000)
Forfeitures (in dollars per share) $ 34.27 $ 27.03
Non-vested at March 31 4,023,000 4,188,000
Non-vested at March 31 (in Dollars per share) $ 25.16 $ 24.51