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Financial Instruments (Details 2) (Interest rate swap [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Summary of effects of interest rate swaps
Loss Recognized in AOCL, net of tax	$ (93)	$ (412)
Interest expense [Member]
Summary of effects of interest rate swaps
Loss Reclassified from AOCL into Expense	$ 387	$ 266

- Definition

The effective portion of loss reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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- Definition

The effective portion of losses on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References+ Details