DEBT Revolving Credit Facility Narrative (Details) (USD $) | Sep. 26, 2014 | Dec. 27, 2013 | Jun. 30, 2014 | Sep. 26, 2014 | Dec. 27, 2013 | Sep. 26, 2014 | Sep. 26, 2014 | Dec. 27, 2013 | Sep. 26, 2014 | Sep. 26, 2014 | Sep. 26, 2014 | Sep. 26, 2014 | Sep. 26, 2014 | Jun. 30, 2014 | Sep. 26, 2014 | Feb. 04, 2013 | Jun. 30, 2014 | Sep. 26, 2014 | Sep. 26, 2014 | Sep. 26, 2014 | Sep. 26, 2014 | Sep. 26, 2014 | Sep. 26, 2014 | Sep. 26, 2014 | Sep. 26, 2014 | Sep. 26, 2014 |
Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Synovus Bank [Member] | Synovus Bank [Member] | Percent of Eligible Billed Accounts Receivable [Member] [Member] | Percent of Eligible Accounts Receivable [Member] | Percent of Eligible Unbilled Accounts Receivable [Member] [Member] | Liquidation Value of Tacoma Headquarters Office Building [Member] | Revolving Credit Facility, Liquidity Requirement Component [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | London Interbank Offered Rate (LIBOR) [Member] | Base Rate [Member] | Minimum [Member] | Minimum [Member] | Minimum [Member] | Maximum [Member] | Maximum [Member] | Less than 25% utilization [Member] | Greater than or equal to 25% utilization [Member] | October 1, 2014 [Member] | October 1, 2014 [Member] |
| | | Revolving Credit Facility [Member] | | | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Synovus Bank [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Revolving Credit Facility, Liquidity Requirement Component [Member] | London Interbank Offered Rate (LIBOR) [Member] | Base Rate [Member] | London Interbank Offered Rate (LIBOR) [Member] | Base Rate [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | London Interbank Offered Rate (LIBOR) [Member] | Base Rate [Member] |
| | | | | | Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | | Revolving Credit Facility [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] | Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] |
| | | | | | | | | | | | | | | Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | | | Revolving Credit Facility [Member] | Revolving Credit Facility [Member] |
Line of Credit Facility [Line Items] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Line of Credit Facility, Maximum Borrowing Capacity | ' | ' | ' | ' | ' | $300,000,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Revolving Credit Facility Borrowing Limits, Percent of Accounts Receivable | ' | ' | ' | ' | ' | ' | ' | ' | 90.00% | 15.00% | 85.00% | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Revolving Credit Facility Borrowing Limits, Liquidation Value Requirement, Pledged Real Estate | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 17,400,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Revolving Credit Facility Borrowing Limits, Quarterly Reduction, Liquidation Value of Pledged Real Estate | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 400,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Revolving Credit Facility Borrowing Limits, Liquidation Value of Pledged Real Estate | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 17,400,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Line of Credit Facility, Current Borrowing Capacity | ' | ' | ' | ' | ' | 255,100,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Long-term Debt | 177,217,000 | 31,923,000 | ' | 146,995,000 | 0 | ' | 30,222,000 | 31,923,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Line of Credit Facility, Amount Outstanding | ' | ' | ' | ' | ' | 20,800,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Line of Credit Facility, Remaining Borrowing Capacity | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 87,300,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Revolving Credit Facility, Liquidity Requirement | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 37,500,000 | ' | ' | ' | ' | ' | ' | ' | ' |
Revolving Credit Facility, Cash and Cash Equivalents Under Control Agreements | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 24,300,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Revolving Credit Facility, Total Liquidity | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | $111,600,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 0.38% | 0.25% | ' | ' |
Debt Instrument, Basis Spread on Variable Rate | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 1.50% | ' | ' | 1.25% | 0.25% | 2.00% | 1.00% | ' | ' | ' | ' |
Revolving Credit Facility, Additional Base Rate | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 1.00% | ' | ' | 0.50% | ' | ' | ' | ' | ' | ' | ' | 1.75% | 0.75% |
Line of Credit Facility, Interest Rate Description | ' | ' | 'one-month | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Line of Credit Facility, Interest Rate at Period End | ' | ' | ' | 2.00% | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Revolving credit facility, utilization rate | ' | ' | ' | ' | ' | 25.00% | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Letters of Credit, Additional Basis Rate | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 0.13% | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |