INTANGIBLE ASSETS

At December 31, 2017 and 2016, intangible assets included the following (in thousands):



	2017		2016
In-place leases, net of accumulated amortization of $91,548 and $46,899 in 2017 and 2016, respectively	$	139,548	$	185,251
Above-market tenant leases, net of accumulated amortization of $13,038 and $6,515 in 2017 and 2016, respectively	26,917		40,260
Below-market ground lease, net of accumulated amortization of $345 and $69 in 2017 and 2016, respectively	18,067		18,344
Goodwill	1,674		1,674
	$	186,206	$	245,529

Aggregate net amortization expense related to intangible assets and liabilities was $42.4 million, $24.0 million, and $23.7 million for the years ended December 31, 2017, 2016, and 2015, respectively. Over the next five years and thereafter, aggregate amortization of these intangible assets and liabilities is anticipated to be as follows (in thousands):



	Below Market Rents			Above Market Ground Lease			Below Market Ground Lease		Above Market Rents		In Place Leases		Total
2018	$	(13,464	)	$	(46	)	$	481	$	6,364	$	33,455	$	26,790
2019	(11,914		)	(46		)	464		5,438		26,563		20,505
2020	(10,817		)	(46		)	449		4,537		21,693		15,816
2021	(9,036		)	(46		)	435		3,444		16,745		11,542
2022	(6,402		)	(46		)	421		2,348		11,529		7,850
Thereafter	(17,056		)	(1,535		)	15,817		4,786		29,563		31,575
	$	(68,689	)	$	(1,765	)	$	18,067	$	26,917	$	139,548	$	114,078
Weighted average remaining lease term	4 years			38 years			66 years		4 years		5 years		14 years

The following is a summary of goodwill activity for the years ended December 31, 2017 and 2016 (in thousands):



	2017		2016
Beginning Balance	$	1,674	$	3,647
Allocated to property sales and Spin-Off	—		(1,973		)
Ending Balance	$	1,674	$	1,674