OTHER INTANGIBLE ASSETS

A schedule of our intangible assets and liabilities and related accumulated amortization and accretion as of December 31, 2017 and 2016, is as follows:



	Assets							Liabilities
December 31, 2017	Acquired Above-Market Leases		Acquired In-Place Leases			Trade Name and License		Acquired Below-Market Leases
	(in thousands)
Gross balance	$	37	$	11,087		$	2,957	$	(2,902	)
Accumulated amortization	—		(7,700		)	—		1,832
	$	37	$	3,387		$	2,957	$	(1,070	)
Average useful life (in years)	7		9			Indefinite		5



	Assets														Liabilities
December 31, 2016	Acquired Above-Market Leases			Acquired In-Place Leases			Tax Abatement (1)			Acquired Below-Market Ground Lease (2)			Trade Name and License		Acquired Below-Market Leases
	(in thousands)
Gross balance	$	215		$	11,551		$	4,273		$	11,685		$	2,957	$	(18,893	)
Accumulated amortization	(180		)	(8,443		)	(2,873		)	(1,562		)	—		15,317
	$	35		$	3,108		$	1,400		$	10,123		$	2,957	$	(3,576	)
Average useful life (in years)	8			10			8			84			Indefinite		8


(1)	Tax abatement is associated with 47 E 34th Street, which was sold in September 2017 (Note 3).


(2)	Acquired below-market ground lease is associated with 800 N Capitol Street, which was sold in August 2017 (Note 3).

The amortization of the acquired above-market leases which decreased rental and other property income was $3,000, $88,000 and $240,000 for the years ended December 31, 2017, 2016 and 2015, respectively. The amortization of the acquired in-place leases included in depreciation and amortization expense was $808,000, $1,347,000 and $1,857,000 for the years ended December 31, 2017, 2016 and 2015, respectively. Tax abatement amortization included in rental and other property operating expenses was $276,000, $551,000 and $551,000 for the years ended December 31, 2017, 2016 and 2015, respectively. Amortization of acquired below-market ground lease included in rental and other property operating expenses was $93,000, $140,000 and $140,000 for the years ended December 31, 2017, 2016 and 2015, respectively. Included in depreciation and amortization expense was franchise affiliation fee amortization of $0, $33,000 and $394,000 for the years ended December 31, 2017, 2016 and 2015, respectively. The amortization of the acquired below-market leases included in rental and other property income was $1,066,000, $2,510,000 and $2,571,000 for the years ended December 31, 2017, 2016 and 2015, respectively.

A schedule of future amortization and accretion of acquisition related intangible assets and liabilities as of December 31, 2017, is as follows:



	Assets				Liabilities
	Acquired		Acquired		Acquired
	Above-Market		In-Place		Below-Market
Years Ending December 31,	Leases		Leases		Leases
	(in thousands)
2018	$	4	$	932	$	(734	)
2019	5		691		(242		)
2020	5		434		(42		)
2021	5		434		(42		)
2022	5		314		(10		)
Thereafter	13		582		—
	$	37	$	3,387	$	(1,070	)