Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Narrative) (Details)

v3.3.0.814
Earnings Per Share (Narrative) (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock repurchase plan, authorized amount $ 700,000,000   $ 700,000,000  
Aggregate shares repurchased under stock repurchase plan (in shares) 19,865,932      
Stock purchase value $ 470,968,000      
Stock Repurchased During Period, Shares     258,874 54,600
Repurchase of Common Stock     $ 14,525,000 $ 7,000
Stock Repurchased During Period, Value       1,957,000
Repurchase of common stock not yet paid     $ 0 $ 1,950,000
Stock Options And Service-Based Restricted Stock Units [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from computation of earnings per share, number of shares 192,652 467,288 141,844 380,716
Performance-Based Restricted Stock Units [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from computation of earnings per share, number of shares 122,857 140,596 123,075 107,347