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Long-Term Indebtedness (Details)
3 Months Ended
Apr. 27, 2016
USD ($)
Mar. 20, 2015
USD ($)
Feb. 24, 2014
USD ($)
Mar. 31, 2017
USD ($)
Mar. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Mar. 31, 2016
USD ($)
Mar. 03, 2015
USD ($)
Line of Credit Facility                
Long-term indebtedness       $ 49,905,000   $ 49,949,000 $ 49,920,000  
Maximum                
Line of Credit Facility                
Equity interest percentage 65.00%              
Line of Credit                
Line of Credit Facility                
Debt outstanding at period end       0   $ 0 0  
Remaining availability under the facilities       $ 297,500,000        
Maximum leverage ratio       2.5        
JPMorgan Chase Bank And Wells Fargo Bank | Line of Credit                
Line of Credit Facility                
Maximum borrowings under line of credit         $ 100,000,000     $ 100,000,000
Letters of credit outstanding amount       $ 2,500,000     $ 2,600,000  
Remaining availability under the facilities       $ 197,500,000        
Prudential Investment Management Inc | Line of Credit                
Line of Credit Facility                
Remaining availability under the facilities     $ 150,000,000.0          
Period after request is issued, by company, for interest payable rate to be determined by Prudential     5 days          
Long-term indebtedness   $ 50,000,000            
Debt Instrument, Term   5 years            
Interest rate during period       3.35%        
JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit                
Line of Credit Facility                
Maximum borrowings under line of credit $ 200,000,000.0              
Maximum draw capacity in approved foreign currencies 50,000,000.0              
Additional maximum borrowing capacity upon approval $ 125,000,000.0              
Option One | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | LIBOR                
Line of Credit Facility                
Basis spread on variable rate 1.00%              
Option One | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | LIBOR | Minimum                
Line of Credit Facility                
Debt instrument, additional margin interest rate 0.00%              
Option One | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | LIBOR | Maximum                
Line of Credit Facility                
Debt instrument, additional margin interest rate 0.625%              
Option One | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | Federal Funds Effective Rate                
Line of Credit Facility                
Basis spread on variable rate 0.50%              
Option Two | JPMorgan Chase Bank, N.A., Wells Fargo Bank, N.A., Bank of America, N.A., and 1st Source Bank | Line of Credit | LIBOR | Maximum                
Line of Credit Facility                
Basis spread on variable rate 1.625%