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Long-Term Debt - Instrument Details (Details)
$ / shares in Units, $ in Thousands
3 Months Ended
Apr. 04, 2017
USD ($)
Nov. 19, 2013
USD ($)
shares
Mar. 31, 2017
USD ($)
item
$ / shares
Mar. 31, 2016
USD ($)
Jan. 03, 2017
USD ($)
Dec. 31, 2016
USD ($)
Jul. 28, 2014
USD ($)
Long-Term Debt              
Repayment of outstanding borrowings     $ 133,399 $ 86,418      
Credit Agreement              
Long-Term Debt              
Sublimit for swingline loans     50,000        
Sublimit for letters of credit     30,000        
Credit Agreement | Subsequent Event              
Long-Term Debt              
Maximum borrowing capacity $ 500,000            
Repayment of outstanding borrowings 295,000            
Revolving Credit Facility              
Long-Term Debt              
Maximum borrowing capacity     600,000   $ 375,000    
Amount outstanding     $ 504,900        
Adjusted LIBO Rates at period end, as a percent     2.20%     4.00%  
Revolving Credit Facility | Subsequent Event              
Long-Term Debt              
Maximum borrowing capacity 400,000            
Accordion Provision Under Credit Facility [Member] | Subsequent Event              
Long-Term Debt              
Maximum borrowing capacity 100,000            
Senior Notes 5.125 Percent Due 2022              
Long-Term Debt              
Face amount of debt issuance     $ 250,000       $ 250,000
Interest rate, as a percentage     5.125%        
Restricted assets     $ 0        
Senior Notes 5.50 Percent Due 2025 | Subsequent Event              
Long-Term Debt              
Face amount of debt issuance $ 300,000            
Interest rate, as a percentage 5.50%            
Convertible Senior Notes 1.00 percent due 2020              
Long-Term Debt              
Face amount of debt issuance     $ 287,500        
Interest rate, as a percentage     1.00%        
Net proceeds after fees and shares repurchase   $ 254,200          
Shares repurchased | shares   665,994          
Fair value of debt component   $ 215,800          
Debt instrument, fair value of embedded option   71,700          
Principal balance   $ 287,500 $ 287,500     $ 287,500  
Effective interest rate percentage   5.26%          
Conversion price (in dollars per share) | $ / shares     $ 52.35        
Conversion ratio per $1 principal amount     0.0191022        
Number of shares to be received upon conversion of debt | item     5,500,000        
Threshold percentage of share price that triggers conversion     135.00%        
Debt conversion, threshold trading days | item     20        
Debt conversion, threshold consecutive trading days     30 days        
Percentage of the total voting power of all classes of common equity as defined as a fundamental change per the terms of the debt agreement     50.00%        
Change in control conversion price, as percentage of par plus interest     100.00%        
Debt Instrument, Convertible, Consecutive Trading Days Available for Conversion     10 days        
Debt Instrument, Convertible, Threshold Consecutive Trading Days     5 days        
Debt Instrument, Convertible, Threshold Percentage of Conversion     98.00%        
Minimum | Credit Agreement              
Long-Term Debt              
Total net leverage ratio, debt covenant     1.50        
Minimum | Revolving Credit Facility | Base Rate              
Long-Term Debt              
Margin (as a percent)     0.00%        
Minimum | Revolving Credit Facility | LIBOR              
Long-Term Debt              
Margin (as a percent)     1.00%        
Maximum | Credit Agreement              
Long-Term Debt              
Senior secured net leverage ratio, debt covenant     2.25        
Total net leverage ratio, debt covenant     4.00        
Total net leverage ratio related to restricted payments     3.00        
Maximum | Revolving Credit Facility | Base Rate              
Long-Term Debt              
Margin (as a percent)     1.25%        
Maximum | Revolving Credit Facility | LIBOR              
Long-Term Debt              
Margin (as a percent)     2.25%