TRADEMARKS, OTHER INTANGIBLE ASSETS AND LIABILITIES

Domestic trademarks consist of the following (in thousands):



	December 26, 2018			December 27, 2017
Cost	$	120,700		$	120,700
Accumulated impairment charges	(58,812		)	(58,812		)
Trademarks, net	$	61,888		$	61,888

Other intangible assets subject to amortization consist of the following (in thousands):



	December 26, 2018			December 27, 2017
Favorable leasehold interest	$	6,038		$	6,038
Less: accumulated amortization	(5,758		)	(5,661		)
Total favorable leasehold interest, net	$	280		$	377
Unfavorable leasehold interest liability	$	(9,156	)	$	(9,156	)
Less: accumulated amortization	8,514			8,370
Unfavorable leasehold interest liability, net	$	(642	)	$	(786	)

The estimated net amortization credits (net liability) for the Company’s favorable and unfavorable leasehold interests for each of the five succeeding fiscal years and thereafter is as follows (in thousands):



For the Years Ending	Favorable Leasehold Interest		Unfavorable Leasehold Interest
December 25, 2019	$	94	$	(136	)
December 30, 2020	85		(123		)
December 29, 2021	64		(120		)
December 28, 2022	37		(107		)
December 28, 2023	—		(100		)
Thereafter	—		(56		)
Total	$	280	$	(642	)

The aggregate amortization expense for the years ended December 26, 2018, December 27, 2017, and December 28, 2016 was less than $0.1 million for fiscal 2018 and $0.1 million, in each of fiscal 2017 and fiscal 2016. The remaining weighted average amortization periods of the favorable leasehold interest and the unfavorable leasehold liability are two years and three years respectively.