DEBT Revolving Credit Facility Narrative (Details) (USD $)			0 Months Ended			9 Months Ended			9 Months Ended					0 Months Ended	9 Months Ended	0 Months Ended		9 Months Ended
	Sep. 26, 2014	Dec. 27, 2013	Jun. 30, 2014 Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member]	Sep. 26, 2014 Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member]	Dec. 27, 2013 Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member]	Sep. 26, 2014 Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 Synovus Bank [Member]	Dec. 27, 2013 Synovus Bank [Member]	Sep. 26, 2014 Percent of Eligible Billed Accounts Receivable [Member] [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 Percent of Eligible Accounts Receivable [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 Percent of Eligible Unbilled Accounts Receivable [Member] [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 Liquidation Value of Tacoma Headquarters Office Building [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 Revolving Credit Facility, Liquidity Requirement Component [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Jun. 30, 2014 London Interbank Offered Rate (LIBOR) [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 London Interbank Offered Rate (LIBOR) [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Feb. 04, 2013 London Interbank Offered Rate (LIBOR) [Member] Synovus Bank [Member]	Jun. 30, 2014 Base Rate [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 Minimum [Member] Revolving Credit Facility, Liquidity Requirement Component [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 Minimum [Member] London Interbank Offered Rate (LIBOR) [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 Minimum [Member] Base Rate [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 Maximum [Member] London Interbank Offered Rate (LIBOR) [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 Maximum [Member] Base Rate [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 Less than 25% utilization [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 Greater than or equal to 25% utilization [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 October 1, 2014 [Member] London Interbank Offered Rate (LIBOR) [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [Member] Revolving Credit Facility [Member]	Sep. 26, 2014 October 1, 2014 [Member] Base Rate [Member] Bank of America, N.A. and Wells Fargo Capital Finance, LLC [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																							0.375%	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															0.125%