Goodwill and Other Intangible Assets

Goodwill, net was as follows:



	At December 31,
(In thousands)	2018		2017
Goodwill related to consumer banking segment	$	141,245	$	141,245
Goodwill related to wholesale banking segment	13,512		13,512
Goodwill, net	$	154,757	$	154,757

Included in goodwill at December 31, 2018 and 2017 was accumulated impairment losses resulting from the impairment charge of $73.0 million in 2017 related to the acquisition of Gateway One as a result of the Company's decision to discontinue auto finance loan originations effective December 1, 2017. Goodwill related to Gateway One was fully impaired at December 31, 2017. There was no impairment of goodwill in 2018 and 2016.

Other intangible assets, net were as follows:



	At December 31,
	2018								2017
(In thousands)	Gross Amount		Accumulated Amortization		Impairment		Net Amount		Gross Amount		Accumulated Amortization		Impairment		Net Amount
Program agreement	$	14,700	$	408	$	—	$	14,292	$	14,700	$	49	$	—	$	14,651
Non-compete agreement	9,250		3,643		—		5,607		9,000		1,081		—		7,919
Customer base intangibles	2,000		1,950		—		50		3,330		2,630		368		332
Deposit base intangibles	3,049		2,502		—		547		3,049		2,289		—		760
Total	$	28,999	$	8,503	$	—	$	20,496	$	30,079	$	6,049	$	368	$	23,662

There was no impairment of other intangible assets in 2018 and 2016. There was an impairment charge of $0.4 million in 2017 related to the customer base intangible asset attributable to Gateway One as a result of the Company's decision to discontinue auto finance loan originations effective December 1, 2017. The Gateway One customer base intangible asset was fully impaired at December 31, 2017 and written off in 2018.

Amortization expense for intangible assets was $3.4 million, $2.0 million and $1.4 million for 2018, 2017 and 2016, respectively. Amortization expense for intangible assets is estimated to be $3.1 million for 2019, $2.7 million for 2020, $2.7 million for 2021, $1.6 million for 2022 and $1.3 million for 2023.

On June 16, 2017, TCF Bank acquired 100% of the outstanding shares of Equipment Financing & Leasing Corporation ("EFLC"). TCF Bank paid $9.0 million in cash upon closing, recorded a liability of $5.9 million to be paid within three years and assumed $64.2 million of EFLC's debt that was subsequently paid off. Assets acquired consisted of $46.4 million of operating lease equipment, $5.9 million of direct financing leases, $21.3 million of intangible assets, $2.2 million related to goodwill and approximately $3.3 million of cash, other assets and other liabilities, net. The weighted-average amortization periods of the acquired program agreement, non-compete agreement and customer base intangibles were 15 years, five years and three years, respectively. The intangible assets are amortized on an accelerated method over their estimated useful lives.

On December 15, 2017, TCF Bank acquired the assets of Rubicon Mortgage Advisors, LLC. TCF recorded an intangible asset of $3.0 million related to a non-compete agreement as part of the acquisition. The weighted-average amortization period of the acquired non-compete agreement was four years. The intangible asset is amortized on a straight-line basis over its estimated useful life.