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Stock-Based Compensation - Additional Information (Details)
12 Months Ended
Dec. 31, 2016
USD ($)
item
shares
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
shares
Dec. 31, 2013
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Dividends paid $ 39,800,000 $ 38,300,000 $ 0  
Unrecognized compensation cost 4,600,000      
Cash received from stock option exercises and employee stock purchases 5,300,000      
Cash used for shares withheld to satisfy employee tax obligations for RSUs and PRSUs converted $ 6,400,000      
Shares authorized for future grant under stock plan (in shares) | shares 2,300,000      
Non-qualified stock options        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Options vesting period 3 years      
Options expiration period 10 years      
Period of historical option activity considered to determine expected option life 10 years      
Number of separate employee groups | item 2      
Unrecognized compensation cost $ 1,100,000 $ 1,200,000    
Non-qualified stock options | Minimum        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Period over which unrecognized compensation costs will be recognized 1 year      
Non-qualified stock options | Maximum        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Period over which unrecognized compensation costs will be recognized 3 years      
RSUs        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares outstanding | shares 508,395 500,000 500,000 600,000
RSUs | Minimum        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Period over which unrecognized compensation costs will be recognized 1 year      
RSUs | Maximum        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Period over which unrecognized compensation costs will be recognized 3 years      
PRSUs        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares outstanding | shares 375,375 400,000 400,000 500,000
Unrecognized compensation cost $ 2,000,000      
Performance period 3 years 3 years 3 years  
PRSUs | Minimum        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Period over which unrecognized compensation costs will be recognized 1 year      
Performance period 3 years      
Current projections and performance targets estimated additional performance shares issuable | shares 200,000      
PRSUs | Maximum        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Period over which unrecognized compensation costs will be recognized 3 years      
Employee stock purchase plan        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Maximum contribution by eligible employees as percentage of base earnings (as a percent) 10.00%      
Maximum contribution by eligible employees in a calendar year $ 25,000      
Common stock purchase price as percentage of fair market value (as a percent) 85.00%      
Shares purchased under employee stock purchase plan (in shares) | shares 47,952 34,468