Note 9—Goodwill, Core Deposit Intangible and Other Intangible Assets

The following tables summarize the changes in the Company’s goodwill, core deposit intangible assets, and customer relationship intangible assets for the three and nine months ended September 30, 2018 and 2017:

	Nine Months Ended September 30,
	2018								2017
	Goodwill		Core Deposit Intangible			Customer Relationship Intangible			Goodwill		Core Deposit Intangible			Customer Relationship Intangible
Beginning balance	$	54,562	$	16,720		$	—		$	51,975	$	19,776		$	—
Additions		72,974		19,060			3,216			—		—			—
Amortization		—		(3,685	)		(89	)		—		(2,293	)		—
Ending balance	$	127,536	$	32,095		$	3,127		$	51,975	$	17,483		$	—
Accumulated amortization	N/A		$	17,151		$	89		N/A		$	12,703		N/A
Weighted average remaining amortization period	N/A		7.1 Years			11.7 Years			N/A		5.8 Years			N/A

	Three Months Ended September 30,
	2018								2017
	Goodwill		Core Deposit Intangible			Customer Relationship Intangible			Goodwill		Core Deposit Intangible			Customer Relationship Intangible
Beginning balance	$	127,536	$	33,917		$	3,194		$	51,975	$	18,247		$	—
Additions		—		—			—			—		—			—
Amortization		—		(1,822	)		(67	)		—		(764	)		—
Ending balance	$	127,536	$	32,095		$	3,127		$	51,975	$	17,483		$	—
Accumulated amortization	N/A		$	17,151		$	89		N/A		$	12,703		N/A
Weighted average remaining amortization period	N/A		7.1 Years			11.7 Years			N/A		5.8 Years			N/A

The Company added additional goodwill, core deposit intangible assets, and customer relationship intangible assets in conjunction with the First Evanston acquisition. Please refer to Note 3—Acquisition of a Business for further details.

Additionally, the Company had other intangible assets of $26,000 and $36,000 as of September 30, 2018 and December 31, 2017, respectively, associated with trademark-related transactions.

The following table presents the estimated amortization expense for core deposit intangible, customer relationship intangible, and other intangible assets recognized at September 30, 2018:

	Estimated Amortization
2018	$	1,807
2019		6,945
2020		6,477
2021		6,026
2022		5,578
Thereafter		8,415
Total	$	35,248