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5. DERIVATIVE INSTRUMENTS (Details 1) (USD $) In Thousands, unless otherwise specified	9 Months Ended		3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 InterestRateSwapMember	Sep. 30, 2011 InterestRateSwapMember
Fair value of derivative instruments
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)
Amount of Gain (Loss) Recognized in Income on Derivative (Ineffective Portion)	4,237	3,747	1,508	1,687
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ (827)	$ (918)	$ (276)	$ (306)

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

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The portion of gains on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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

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