Consolidated Condensed Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 28, 2015	Mar. 29, 2014
NET INCOME (LOSS)	$ (2,468)us-gaap_NetIncomeLoss	$ 4,628us-gaap_NetIncomeLoss
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Unrealized loss on interest rate swaps	(1,014)	(582)
Reclassification of loss into earnings from interest rate swaps	83	53
Reclassification of net actuarial gain into earnings from postretirement benefit plans	(5)	(6)
Reclassification of prior service credits into earnings from postretirement benefit plans	(13)	(14)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX	(949)	(549)
COMPREHENSIVE INCOME (LOSS)	$ (3,417)us-gaap_ComprehensiveIncomeNetOfTax	$ 4,079us-gaap_ComprehensiveIncomeNetOfTax

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) related to pension and other postretirement benefit plans.

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- Definition

Amount after tax of reclassification adjustment from accumulated other comprehensive income (loss) for actuarial gain (loss) related to pension and other postretirement benefit plans.

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- Definition

Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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