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Debt Additional Disclosures (Details) - USD ($)
$ in Thousands
May. 09, 2016
Mar. 31, 2016
Feb. 05, 2016
Dec. 31, 2015
Jul. 01, 2015
Apr. 02, 2015
Collateralized Debt Obligations [Member] | Notes Payable to Banks [Member]            
Long-Term Debt Additional Disclosures [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage       2.60%   5.30%
Collateralized Debt Obligations [Member] | Notes Payable, Other Payables [Member]            
Long-Term Debt Additional Disclosures [Line Items]            
Notes Payable, Current   $ 627        
Notes Payable, Noncurrent   13,892        
Notes Payable   14,519   $ 14,671    
Collateralized Debt Obligations [Member] | Mortgage Loans on Real Estate [Member]            
Long-Term Debt Additional Disclosures [Line Items]            
Prepayment penalty reduced rate         1.00%  
Secured Debt [Member] | Senior Debt Obligations [Member]            
Long-Term Debt Additional Disclosures [Line Items]            
Senior Notes   131,750   $ 85,000    
Debt Instrument, Face Amount     $ 250,000      
Pledged Financial Instruments, Not Separately Reported, Securities for Letter of Credit Facilities   $ 1,860        
Long-term Line of Credit     $ 150,000      
Debt Instrument, Interest Rate, Additional Margin Minimum     0.75%      
Debt Instrument, Interest Rate, Margin Maximum     1.75%      
Debt Instrument, interest rate margin LIBOR minimum     1.75%      
Debt Instrument, interest rate margin LIBOR maximum     2.75%      
Debt Instrument, unused line fee minimum     0.30%      
Debt Instrument, unused line fee maximum     0.50%      
Subsequent Event [Member] | Secured Debt [Member] | Senior Debt Obligations [Member]            
Long-Term Debt Additional Disclosures [Line Items]            
Senior Notes $ 196,750