Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2018

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, 2018 and December 31, 2017 (in thousands):

	March 31, 2018			December 31, 2017
Identified intangible assets (included in other assets):
Gross amount	$	282,288		$	325,880
Accumulated amortization	(241,043		)	(277,038		)
Net(1)	$	41,245		$	48,842
Identified intangible liabilities (included in deferred revenue):
Gross amount	$	359,469		$	540,283
Accumulated amortization	(256,685		)	(402,583		)
Net(1)	$	102,784		$	137,700

(1) As of March 31, 2018 and December 31, 2017, $0.1 million and $13.9 million, respectively and $0.1 million and $4.1 million, respectively, of net intangible assets and net intangible liabilities, were reclassified to assets held for sale and liabilities related to assets held for sale.

Schedule of marketable securities

At March 31, 2018 and December 31, 2017, we held the following marketable securities (in thousands):

	March 31, 2018		December 31, 2017
Commercial mortgage-backed securities	$	28,252	$	28,579
Total marketable securities available-for-sale	$	28,252	$	28,579