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Fair Value Measurements (Long-term Debt) (Details)
Apr. 01, 2017
USD ($)
Dec. 31, 2016
USD ($)
Variable Rate Debt Instruments    
Debt Instrument [Line Items]    
Long-term debt $ 290,000,000 $ 214,000,000
Revolving Credit Facility    
Debt Instrument [Line Items]    
Maximum borrowing capacity 400,000,000  
Outstanding balance 290,000,000  
Long-term Debt    
Debt Instrument [Line Items]    
Long-term debt 175,000,000  
Short-term Debt    
Debt Instrument [Line Items]    
Long-term debt $ 115,000,000  
Revolving Credit Facility    
Debt Instrument [Line Items]    
Ratio of interest coverage to earnings for the last four fiscal quarters 4.0  
Ratio of leverage to earnings for the last four fiscal quarters 3.5