Real Estate Intangibles (Tables)

3 Months Ended

Mar. 31, 2014

Real Estate Intangibles (Tables) [Abstract]

Summary of real estate intangibles excluding those classified as held for sale

		March 31, 2014		December 31, 2013
Assets:
	In place lease intangibles	$	930,687	$	937,357
	Above market tenant leases		57,910		55,939
	Below market ground leases		59,165		59,165
	Lease commissions		18,864		18,293
	Gross historical cost		1,066,626		1,070,754
	Accumulated amortization		(649,362)		(571,008)
	Net book value	$	417,264	$	499,746
	Weighted-average amortization period in years		17.3		16.7
Liabilities:
	Below market tenant leases	$	76,340	$	76,381
	Above market ground leases		9,490		9,490
	Gross historical cost		85,830		85,871
	Accumulated amortization		(36,086)		(34,434)
	Net book value	$	49,744	$	51,437
	Weighted-average amortization period in years		14.3		14.3

Schedule of Real Estate Intangible Amortization

	Three Months Ended
	March 31,
	2014		2013
Rental income related to above/below market tenant leases, net	$	(45)	$	148
Property operating expenses related to above/below market ground leases, net		(311)		(320)
Depreciation and amortization related to in place lease intangibles and lease commissions		(79,393)		(50,576)

Schedule of the future estimated aggregate amortization of intangible assets and liabilities

		Assets		Liabilities
2014	$	131,571	$	3,319
2015		60,803		6,144
2016		27,796		5,230
2017		21,181		4,936
2018		18,396		4,609
Thereafter		157,517		25,506
Totals	$	417,264	$	49,744