Real Estate Intangibles (Tables)

9 Months Ended

Sep. 30, 2013

Real Estate Intangibles (Tables) [Abstract]

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

		September 30, 2013		December 31, 2012
Assets:
	In place lease intangibles	$	918,507	$	541,729
	Above market tenant leases		54,091		56,086
	Below market ground leases		61,461		61,450
	Lease commissions		16,483		14,419
	Gross historical cost		1,050,542		673,684
	Accumulated amortization		(472,389)		(257,242)
	Net book value	$	578,153	$	416,442
	Weighted-average amortization period in years		17.1		16.4
Liabilities:
	Below market tenant leases	$	76,239	$	77,036
	Above market ground leases		9,490		9,490
	Gross historical cost		85,729		86,526
	Accumulated amortization		(32,894)		(27,753)
	Net book value	$	52,835	$	58,773
	Weighted-average amortization period in years		14.3		14.3

Schedule of Real Estate Intangible Amortization

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Rental income related to above/below market tenant leases, net	$	235	$	(972)	$	596	$	452
Property operating expenses related to above/below market ground leases, net		(303)		(555)		(909)		(1,219)
Depreciation and amortization related to in place lease intangibles and lease commissions		(78,782)		(22,271)		(168,441)		(78,114)

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

		Assets		Liabilities
2013	$	93,415	$	1,730
2014		207,606		6,583
2015		58,816		5,623
2016		25,985		5,185
2017		26,825		4,894
Thereafter		165,506		28,820
Totals	$	578,153	$	52,835