Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

Summary of identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases)

The following summarizes our identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases) as of March 31, 2015 and December 31, 2014 (in thousands):

	March 31, 2015			December 31, 2014
Identified intangible assets (included in other assets):
Gross amount	$	968,763		$	664,297
Accumulated amortization	(408,884		)	(383,236		)
Net	$	559,879		$	281,061
Identified intangible liabilities (included in deferred revenue):
Gross amount	$	847,326		$	655,755
Accumulated amortization	(506,578		)	(483,948		)
Net	$	340,748		$	171,807

Schedule of marketable securities

At March 31, 2015 and December 31, 2014, we held the following marketable securities (in thousands):

	March 31, 2015		December 31, 2014
Equity marketable securities	$	4,287	$	4,332
Mortgage-backed securities	43,429		35,097
Total marketable securities available-for-sale	$	47,716	$	39,429