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Shareholders' Equity (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Oct. 28, 2013
$ / shares
Feb. 29, 2012
$ / shares
Dec. 31, 2015
USD ($)
plans
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
shares
Dec. 31, 2013
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Dividends per share of common stock (in dollars per share) | $ / shares $ 0.20 $ 0.15 $ 0.80 $ 0.80 $ 0.65
Dividends payable     $ 5,542 $ 5,510 $ 5,545
Preferred stock, shares authorized | shares     500,000 500,000  
Preferred stock, par value (in dollars per per share) | $ / shares     $ 0.01 $ 0.01  
Shares authorized under repurchase program     $ 200,000    
Total stock repurchased under plan, shares | shares     6,100,000    
Total stock repurchased under plan, value     $ 162,600    
Remaining authorized repurchase amount     $ 37,400    
Number of share repurchased | shares       400,000 1,600,000
Repurchase of treasury stock       $ 16,862 $ 50,556
Number of shares reserved for share-based compensation plans | shares     8,800,000    
Number of share-based compensation plans | plans     3    
Number of shares available for grant | shares     2,100,000    
Vesting term (in years)     5 years    
Stock-based compensation     $ 7,499 9,330 5,593
Tax benefit from stock-based compensation     2,700 3,400 2,100
Proceeds from stock options exercised     $ 200 1,800 $ 16,700
Stock Options and Stock Appreciation Rights (SARs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Expiration period from date of grant (in years)     10 years    
Selling and Administrative Expenses [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation     $ 1,000 $ 3,900