Risk Management and Use of Financial Instruments Risk Management and Use of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2013

Derivatives, Fair Value [Line Items]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

Hedge Product	Hedge Type	Designation		Notional Amount				Strike		Trade Date	Maturity Date	Fair value
				06/30/2013		12/31/2012						06/30/2013			12/31/2012
Assets:
Swap	Interest Rate	Cash Flow	(a)	25,774		25,774		3.300	%	December 22, 2011	January 30, 2021	154			(1,262		)
Swap	Interest Rate	Cash Flow	(a)	25,774		25,774		3.090	%	January 6, 2012	October 30, 2019	21			(1,129		)
				$	51,548	$	51,548					$	175		$	(2,391	)
Liabilities:
Swap	Interest Rate	Cash Flow	(a)	$	200,000	$	200,000	3.623	%	December 6-13, 2011	February 1, 2019	$	(1,506	)	$	(8,859	)
Swap	Interest Rate	Cash Flow	(a)	77,000		77,000		2.703	%	December 9-13, 2011	February 1, 2016	(798		)	(1,343		)
Swap	Interest Rate	Cash Flow	(a)	50,000		50,000		2.470	%	December 13, 2011	February 1, 2015	(328		)	(458		)
Swap	Interest Rate	Cash Flow	(a)	23,000		23,000		2.513	%	December 7-12, 2011	May 1, 2015	(174		)	(245		)
Swap	Interest Rate	Cash Flow	(a)	27,062		27,062		2.750	%	December 21, 2011	September 30, 2017	(283		)	(914		)
				$	377,062	$	377,062					$	(3,089	)	$	(11,819	)