Derivative Instruments and Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2011

Derivative Instruments and Hedging Activities

Schedule of Notional Values and Fair Values of Derivative Instruments

	December 31, 2011
			Asset derivatives			Liability derivatives
	Notional Value		Balance sheet location	Positive fair value		Balance sheet location	Negative fair value
Derivatives designated as hedging instruments under Topic 815:
Cash flow interest rate contracts	$	761,907	Other assets	$	—	Accounts payable and accrued expenses	$	(24,877	)
	December 31, 2010
			Asset derivatives			Liability derivatives
	Notional Value		Balance sheet location	Positive fair value		Balance sheet location	Negative fair value
Derivatives designated as hedging instruments under Topic 815:
Cash flow interest rate contracts	$	491,807	Other assets	$	—	Accounts payable and accrued expenses	$	(9,259	)

Schedule of Derivative Instruments in Consolidated Statements of Operations

	Year Ended December 31, 2011
	Loss recognized in OCI (effectiveness)		Location of loss reclassified from OCI into income	Loss reclassified from OCI into income		Location of loss recognized in OCI (ineffectiveness)	Loss recognized due to ineffectiveness
Cash flow interest rate contracts	$	29,567	Interest expense	$	13,949	None	$	—
	Year Ended December 31, 2010
	Loss recognized in OCI (effectiveness)		Location of loss reclassified from OCI into income	Loss reclassified from OCI into income		Location of loss recognized in OCI (ineffectiveness)	Loss recognized due to ineffectiveness
Cash flow interest rate contracts	$	12,411	Interest expense	$	3,073	None	$	—