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Line of Credit (Details) - USD ($)
$ in Millions
Dec. 14, 2014
Sep. 25, 2016
Dec. 19, 2014
Debt Instrument [Line Items]      
Debt Intrument, Collateral, Percent of non US equity 65.00%    
Revolving Credit Facility [Member] | Line of Credit [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Description of Variable Rate Basis JPMCB’s prime rate    
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.20%    
Revolving Credit Facility [Member] | Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Description of Variable Rate Basis London interbank    
J.P. Morgan Chase Bank N.A. and Wells Fargo Bank N.A. [Member] | Revolving Credit Facility [Member] | Line of Credit [Member]      
Debt Instrument [Line Items]      
Line of Credit, Accordian Feature, Increase Limit     $ 50.0
Line of Credit Facility, Maximum Borrowing Capacity     $ 100.0
Line of Credit Facility, Remaining Borrowing Capacity   $ 97.2  
Letters of Credit Outstanding, Amount   $ 2.8  
Minimum [Member] | Revolving Credit Facility [Member] | Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 0.75%    
Minimum [Member] | Revolving Credit Facility [Member] | Line of Credit [Member] | Base Rate [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 0.00%    
Maximum [Member] | Revolving Credit Facility [Member] | Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 1.25%    
Maximum [Member] | Revolving Credit Facility [Member] | Line of Credit [Member] | Base Rate [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 0.25%