Intangible Assets and Below Market Lease Liabilities (Tables)

9 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Total Intangible Assets and Below Market Lease Liabilities [Table Text Block]

The following table sets forth total intangible assets and acquisition-related below market lease liabilities, net of accumulated amortization:

	September 30, 2017			December 31, 2016
Assets:
Deferred leasing costs (including lease incentives and above market lease and in-place lease acquisition-related intangible assets)	$	348,628		$	353,581
Less accumulated amortization	(145,814		)	(140,081		)
	$	202,814		$	213,500
Liabilities (in accounts payable, accrued expenses and other liabilities):
Acquisition-related below market lease liabilities	$	60,304		$	61,221
Less accumulated amortization	(26,905		)	(23,074		)
	$	33,399		$	38,147

Amortization of Intangible Assets and Below Market Lease Liabilities [Table Text Block]

The following table sets forth amortization of intangible assets and below market lease liabilities:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
Amortization of deferred leasing costs and acquisition-related intangible assets (in depreciation and amortization)	$	10,130		$	10,111		$	30,882		$	33,177
Amortization of lease incentives (in rental and other revenues)	$	444		$	273		$	1,284		$	1,374
Amortization of acquisition-related intangible assets (in rental and other revenues)	$	671		$	901		$	2,382		$	2,904
Amortization of acquisition-related intangible assets (in rental property and other expenses)	$	140		$	140		$	416		$	417
Amortization of acquisition-related below market lease liabilities (in rental and other revenues)	$	(1,576	)	$	(1,734	)	$	(4,748	)	$	(6,294	)

Scheduled Future Amortization of Intangible Assets and Below Market Lease Liabilities [Table Text Block]

The following table sets forth scheduled future amortization of intangible assets and below market lease liabilities:

	Amortization of Deferred Leasing Costs and Acquisition-Related Intangible Assets (in Depreciation and Amortization)		Amortization of Lease Incentives (in Rental and Other Revenues)		Amortization of Acquisition-Related Intangible Assets (in Rental and Other Revenues)		Amortization of Acquisition-Related Intangible Assets (in Rental Property and Other Expenses)		Amortization of Acquisition-Related Below Market Lease Liabilities (in Rental and Other Revenues)
October 1 through December 31, 2017	$	10,019	$	427	$	469	$	134	$	(1,497	)
2018	35,970		1,599		1,680		553		(5,962		)
2019	30,311		1,377		1,286		553		(5,492		)
2020	25,589		1,101		967		525		(5,180		)
2021	21,254		886		647		—		(4,409		)
Thereafter	61,333		4,249		1,885		—		(10,859		)
	$	184,476	$	9,639	$	6,934	$	1,765	$	(33,399	)
Weighted average remaining amortization periods as of September 30, 2017 (in years)	7.6		9.5		6.5		3.2		6.8