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Debt (Details)
$ in Thousands
Jul. 01, 2014
Sep. 30, 2016
USD ($)
covenant
Mar. 31, 2016
Dec. 31, 2015
USD ($)
Sep. 30, 2015
Jul. 02, 2014
USD ($)
covenant
Apr. 01, 2010
Debt Instrument [Line Items]              
Long-term Debt   $ 60,022   $ 64,692      
Long-term Debt, Current Maturities   7,890   6,638      
Long-term Debt, Excluding Current Maturities   52,132   58,054      
Senior Credit Facility [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Term 5 years            
Line of Credit [Member] | Term Loan [Member]              
Debt Instrument [Line Items]              
Long-term Debt   $ 55,250   58,906      
Line of Credit [Member] | Senior Credit Facility [Member] | Line of Credit [Member]              
Debt Instrument [Line Items]              
Line of Credit Facility, Current Borrowing Capacity           $ 80,000  
Number of Financial Covenants | covenant           2  
Consolidated Leverage Ratio 2.00            
Line of Credit Facility, Covenant Compliance, Maximum Consolidated Fixed Charge Coverage Ratio   1.25          
Line of Credit [Member] | Senior Credit Facility [Member] | Line of Credit [Member] | Debt Instrument, Redemption, Period One [Member]              
Debt Instrument [Line Items]              
Line of Credit Facility, Covenant Compliance, Maximum Consolidated Leverage Ratio   1.25          
Line of Credit [Member] | Senior Credit Facility [Member] | Line of Credit [Member] | Debt Instrument, Redemption, Period Two [Member]              
Debt Instrument [Line Items]              
Line of Credit Facility, Covenant Compliance, Maximum Consolidated Leverage Ratio     1.25        
Line of Credit [Member] | Senior Credit Facility [Member] | Line of Credit [Member] | Debt Instrument, Redemption, Period Three [Member]              
Debt Instrument [Line Items]              
Line of Credit Facility, Covenant Compliance, Maximum Consolidated Leverage Ratio         1.00    
Line of Credit [Member] | Senior Credit Facility [Member] | Revolving Credit Facility [Member]              
Debt Instrument [Line Items]              
Line of Credit Facility, Current Borrowing Capacity           $ 15,000  
Line of Credit [Member] | Senior Credit Facility [Member] | Term Loan [Member]              
Debt Instrument [Line Items]              
Line of Credit Facility, Current Borrowing Capacity           $ 65,000  
Mortgages [Member]              
Debt Instrument [Line Items]              
Long-term Debt   $ 2,993   3,114      
Mortgages [Member] | Mortgage Loan On Headquarters Facility [Member]              
Debt Instrument [Line Items]              
Number of Financial Covenants | covenant   1          
Mortgages [Member] | Mortgage Loan On Headquarters Facility [Member] | Minimum [Member]              
Debt Instrument [Line Items]              
Debt Covenant, Cash And Cash Equivalents Threshold   $ 25,000          
Mortgages [Member] | Mortgage Loan On Headquarters Facility [Member] | Debt Instrument, Redemption, Period One [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Effective Percentage             5.905%
Mortgages [Member] | Mortgage Loan On Headquarters Facility [Member] | Debt Instrument, Redemption, Period Two [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Effective Percentage             6.07%
Equipment Loan [Member]              
Debt Instrument [Line Items]              
Long-term Debt   $ 1,779   $ 2,672