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COMMITMENTS AND CONTINGENCIES - Revolving Credit Facility (Details) (Revolving credit facility, Bank of America, N.A. and Wells Fargo Capital Finance, LLC, USD $)
 3 Months Ended
Mar. 28, 2014
Revolving Credit Facility [Line Items]  
Maximum borrowing capacity $ 80,000,000
Remaining borrowing capacity 80,000,000
Amount outstanding 6,000,000
Unused capacity commitment fee percentage 0.25%
Excess Liquidity Greater than $40 million | Minimum
  
Revolving Credit Facility [Line Items]  
Revolving credit facility, excess liquidity 40,000,000
Excess Liquidity Between $20 million and $40 million | Minimum
  
Revolving Credit Facility [Line Items]  
Revolving credit facility, excess liquidity 20,000,000
Excess Liquidity Between $20 million and $40 million | Maximum
  
Revolving Credit Facility [Line Items]  
Revolving credit facility, excess liquidity 40,000,000
Excess Liquidity Less than $20 million | Maximum
  
Revolving Credit Facility [Line Items]  
Revolving credit facility, excess liquidity 20,000,000
Liquidity requirement component
  
Revolving Credit Facility [Line Items]  
Remaining borrowing capacity 74,000,000
Cash and cash equivalents under control agreements 149,200,000
Revolving credit facility, total liquidity 223,200,000
Liquidity requirement component | Minimum
  
Revolving Credit Facility [Line Items]  
Revolving credit facility, liquidity requirement 12,000,000
Percent of eligible accounts receivable
  
Revolving Credit Facility [Line Items]  
Revolving credit facility borrowing limits, % of accounts receivable 85.00%
Liquidation value of pledged real estate
  
Revolving Credit Facility [Line Items]  
Revolving credit facility borrowing limits, pledged real estate 15,000,000
Revolving credit facility borrowing limits, quarterly reduction of pledged real estate 400,000
Revolving credit facility borrowing limits, liquidation value of pledged real estate $ 11,600,000
Prime Rate | Excess Liquidity Greater than $40 million
  
Revolving Credit Facility [Line Items]  
Basis spread on variable rate 0.50%
Prime Rate | Excess Liquidity Between $20 million and $40 million
  
Revolving Credit Facility [Line Items]  
Basis spread on variable rate 0.75%
Prime Rate | Excess Liquidity Less than $20 million
  
Revolving Credit Facility [Line Items]  
Basis spread on variable rate 1.00%
LIBOR Rate
  
Revolving Credit Facility [Line Items]  
Letters of Credit, Additional Basis Rate 0.125%
LIBOR Rate | Excess Liquidity Greater than $40 million
  
Revolving Credit Facility [Line Items]  
Basis spread on variable rate 1.50%
LIBOR Rate | Excess Liquidity Between $20 million and $40 million
  
Revolving Credit Facility [Line Items]  
Basis spread on variable rate 1.75%
LIBOR Rate | Excess Liquidity Less than $20 million
  
Revolving Credit Facility [Line Items]  
Basis spread on variable rate 2.00%