Goodwill and Other Intangible Assets

In accordance with the Intangibles – Goodwill and Other topic of the FASB ASC, goodwill is not amortized but is reviewed for potential impairment at the reporting unit level. Management analyzes its goodwill for impairment on an annual basis and between annual tests in certain circumstances such as upon material adverse changes in legal, business, regulatory and economic factors. An impairment loss is recorded to the extent that the carrying amount of goodwill exceeds its implied fair value. The Company performed its annual impairment assessment as of July 31, 2018 and concluded that there was no impairment. As of December 31, 2018, we determined there were no events or circumstances which would more likely than not reduce the fair value of our reporting unit below its carrying amount.

The core deposit intangible (“CDI”) is evaluated for impairment if events and circumstances indicate a possible impairment. The CDI is amortized on an accelerated basis over an estimated life of 10 years.

The following table sets forth activity for goodwill and other intangible assets for the periods indicated:



	Years Ended December 31,
	2018			2017			2016
	(in thousands)
Goodwill, beginning of period	$	765,842		$	382,762		$	382,762
Established through acquisitions (1)	—			383,080			—
Total goodwill, end of period	765,842			765,842			382,762
Other intangible assets, net
Core deposit intangible:
Gross core deposit intangible balance, beginning of period	105,473			58,598			58,598
Accumulated amortization, beginning of period	(48,219		)	(41,886		)	(35,940		)
Core deposit intangible, net, beginning of period	57,254			16,712			22,658
Established through acquisition (1)	—			46,875			—
CDI current period amortization	(12,236		)	(6,333		)	(5,946		)
Total core deposit intangible, end of period	45,018			57,254			16,712
Intangible assets not subject to amortization	919			919			919
Other intangible assets, net at end of period	45,937			58,173			17,631
Total goodwill and intangible assets, end of period	$	811,779		$	824,015		$	400,393

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(1) See Note 2, “Business Combinations,” for additional information regarding the goodwill related to the acquisition of Pacific Continental on November 1, 2017.

The following table provides the estimated future amortization expense of core deposit intangibles for the succeeding five years:



	Years Ending December 31,
	(in thousands)
2019	$	10,479
2020	8,724
2021	7,264
2022	5,880
2023	4,552