Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity (Narrative) (Details)

v3.5.0.2
Shareholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
9 Months Ended 12 Months Ended
Sep. 22, 2016
Sep. 30, 2016
Dec. 31, 2015
Jan. 27, 2015
Share Repurchase Program [Line Items]        
Share repurchased and retired   357    
Value of shares repurchased and retired   $ 16,600    
Outstanding common stock acquired, average price   $ 46.45    
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased   2,700    
Dividends, Common Stock, Cash $ 18,300 $ 54,880 $ 597,864  
Common Stock, Dividends, Per Share, Cash Paid $ 0.35      
4 Million Share Program Approved 1/27/2015 [Member]        
Share Repurchase Program [Line Items]        
Stock Repurchase Program, Number of Shares Authorized to be Repurchased       4,000