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Stock-Based Compensation Plans (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Feb. 04, 2017
$ / shares
shares
Apr. 20, 2016
$ / shares
shares
Feb. 06, 2013
Mar. 31, 2015
$ / shares
Dec. 31, 2016
USD ($)
plan
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Dec. 31, 2014
USD ($)
shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]              
Number of stock-based incentive plans | plan         1    
Number of stock option plans superseded | plan         2    
Aggregate Intrinsic Value              
Total intrinsic value of stock options exercised (in dollars) | $         $ 3,100 $ 2,400 $ 800
Unrecognized compensation cost and vesting period              
Unrecognized compensation costs related to unvested stock-based compensation arrangements | $         $ 24,800    
Weighted-average period for recognition of unrecognized stock-based compensation expense         1 year 8 months 3 days    
Other disclosures              
Stock-based compensation expense recognized in operating expenses | $         $ 13,113 $ 11,212 $ 12,299
Stock Bonus Plan              
Other disclosures              
Shares issued and committed to issue | shares         12,000 10,000 16,000
Stock-based compensation expense recognized in operating expenses | $         $ 800 $ 700 $ 900
Requisite service period for options to vest         10 years    
Restricted Stock Units              
Restricted stock unit activity              
Outstanding at the beginning of the period (in shares) | shares         527,000    
Awarded (in shares) | shares         442,000    
Vested (in shares) | shares         (343,000)    
Forfeited (in shares) | shares         (11,000)    
Outstanding at the end of the period (in shares) | shares         615,000 527,000  
Outstanding and expected to vest at the end of the period (in shares) | shares         601,000    
Weighted-Average Exercise Price              
Outstanding at the beginning of the period (in dollars per share)         $ 31.56    
Awarded (in dollars per share)   $ 38.00     31.98    
Vested (in dollars per share)         31.64    
Forfeited (in dollars per share)         32.02    
Outstanding at the end of the period (in dollars per share)         31.81 $ 31.56  
Outstanding and expected to vest at the end of the period (in dollars per share)         $ 31.81    
Aggregate Intrinsic Value              
Outstanding at the end of the period (in dollars) | $         $ 26,915 $ 17,994  
Outstanding and expected to vest at end of the period (in dollars) | $         $ 26,282    
Closing price per share (in dollars per share)         $ 43.75    
Total intrinsic value of awards vested (in dollars) | $         $ 10,800 $ 10,300 9,100
Weighted-Average Exercise Price              
Outstanding at the beginning of the period (in dollars per share)         $ 31.56    
Forfeited (in dollars per share)         32.02    
Outstanding at the end of the period (in dollars per share)         $ 31.81 $ 31.56  
Aggregate Intrinsic Value              
Outstanding at the end of the period (in dollars) | $         $ 26,915 $ 17,994  
Non-Qualified Stock Options              
Weighted-Average Exercise Price              
Outstanding at the beginning of the period (in dollars per share)         $ 29.55    
Forfeited (in dollars per share)         21.25    
Outstanding at the end of the period (in dollars per share)         $ 29.66 $ 29.55  
Aggregate Intrinsic Value              
Outstanding at the end of the period (in dollars) | $         $ 3,538 $ 2,406  
Total intrinsic value of awards vested (in dollars) | $         $ 0 $ 0 $ 0
Non-Qualified Stock Options activity              
Outstanding at the beginning of the period (in shares) | shares         523,000    
Exercised (in shares) | shares         (271,000)    
Forfeited (in shares) | shares         (1,000)    
Outstanding at the end of the period (in shares) | shares         251,000 523,000  
Weighted-Average Exercise Price              
Outstanding at the beginning of the period (in dollars per share)         $ 29.55    
Exercised (in dollars per share)         29.48    
Forfeited (in dollars per share)         21.25    
Outstanding at the end of the period (in dollars per share)         $ 29.66 $ 29.55  
Weighted-Average Remaining Contractual Life              
Outstanding at the end of the period         1 year 1 month 6 days 2 years 1 month 6 days  
Aggregate Intrinsic Value              
Outstanding at the end of the period (in dollars) | $         $ 3,538 $ 2,406  
Closing price of share (in dollars per share)         $ 43.75    
Unvested Options              
Number of Shares, Unvested Stock Options              
Unvested (in shares) | shares         0   99,000
Weighted-Average Grant-Date Fair Value, Unvested Stock Options              
Vested (in dollars per share)       $ 10.33      
Cash Settled Awards | Stock Bonus Plan              
Other disclosures              
Shares issued and committed to issue | shares         3,000    
Independent directors | Restricted Stock Units              
Restricted stock unit activity              
Awarded (in shares) | shares   1,800          
Independent directors | Restricted Stock Units | Restrictions lapse (awards vest) on date of award              
Stock-Based Compensation              
Vesting percent     25.00%        
Independent directors | Restricted Stock Units | Restrictions lapse (awards vest) on first, second and third anniversaries of the date of the award              
Stock-Based Compensation              
Vesting percent     25.00%        
Restrictions on awards to certain officers | Restricted Stock Units | Restrictions lapse (awards vest) on the fourth anniversary of the date of the award              
Stock-Based Compensation              
Vesting percent     25.00%        
Restrictions on awards to certain officers | Restricted Stock Units | Restrictions lapse (awards vest) on the third anniversary of the date of the award              
Stock-Based Compensation              
Vesting percent     100.00%        
Subsequent Event | Restricted Stock Units              
Restricted stock unit activity              
Awarded (in shares) | shares 616,679            
Subsequent Event | Independent directors | Restricted Stock Units              
Weighted-Average Exercise Price              
Awarded (in dollars per share) $ 43.75