Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2013

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 September 30, 2013 and December 31, 2012 (in thousands):

	September 30,     2013			December 31,   2012
Identified intangible assets (included in other assets):
Gross amount	$	732,160		$	725,861
Accumulated amortization	(325,224		)	(263,107		)
Net	$	406,936		$	462,754
Identified intangible liabilities (included in deferred revenue):
Gross amount	$	667,495		$	651,921
Accumulated amortization	(411,814		)	(357,225		)
Net	$	255,681		$	294,696

Schedule of marketable securities

At September 30, 2013 and December 31, 2012, we held the following marketable securities (in thousands): 

	September 30,     2013		December 31,   2012
Level 1 – Equity marketable securities	$	3,109	$	2,202
Level 2 – Commercial mortgage-backed securities	26,346		15,575
Level 3 – Rake bonds	3,408		3,652
Total marketable securities available-for-sale	$	32,863	$	21,429