Real Estate Intangibles (Tables)

9 Months Ended

Sep. 30, 2016

Real Estate Intangibles (Tables) [Abstract]

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

		September 30, 2016		December 31, 2015
Assets:
	In place lease intangibles	$	1,272,177	$	1,179,537
	Above market tenant leases		62,544		67,529
	Below market ground leases		62,257		80,224
	Lease commissions		26,054		23,295
	Gross historical cost		1,423,032		1,350,585
	Accumulated amortization		(971,883)		(881,096)
	Net book value	$	451,149	$	469,489
	Weighted-average amortization period in years		14.0		13.4
Liabilities:
	Below market tenant leases	$	93,507	$	93,089
	Above market ground leases		8,107		7,907
	Gross historical cost		101,614		100,996
	Accumulated amortization		(51,727)		(46,048)
	Net book value	$	49,887	$	54,948
	Weighted-average amortization period in years		15.4		14.5

Schedule of Real Estate Intangible Amortization

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Rental income related to above/below market tenant leases, net	$	278	$	(1,684)	$	569	$	(1,901)
Property operating expenses related to above/below market ground leases, net		(309)		(308)		(931)		(962)
Depreciation and amortization related to in place lease intangibles and lease commissions		(30,137)		(26,137)		(95,610)		(82,434)

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

		Assets		Liabilities
2016	$	45,156	$	1,810
2017		122,892		6,819
2018		70,566		6,234
2019		29,877		5,825
2020		22,830		5,344
Thereafter		159,828		23,855
Total	$	451,149	$	49,887