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 on July 31 and between annual tests in certain circumstances such as 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 an annual impairment assessment as of July 31, 2018 and concluded that there was no impairment.

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:



	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
	(in thousands)
Goodwill
Total goodwill (1)	$	765,842		$	382,762		$	765,842		$	382,762
Other intangible assets, net
Core deposit intangible:
Gross core deposit intangible balance at beginning of period	105,473			58,598			105,473			58,598
Accumulated amortization at beginning of period	(54,495		)	(44,484		)	(48,219		)	(41,886		)
Core deposit intangible, net at beginning of period	50,978			14,114			57,254			16,712
CDI current period amortization	(3,070		)	(1,188		)	(9,346		)	(3,786		)
Total core deposit intangible, net at end of period	47,908			12,926			47,908			12,926
Intangible assets not subject to amortization	919			919			919			919
Other intangible assets, net at end of period	48,827			13,845			48,827			13,845
Total goodwill and other intangible assets at end of period	$	814,669		$	396,607		$	814,669		$	396,607

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(1) See Note 3, “Business Combinations,” for additional information regarding goodwill and intangible assets recorded 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 remaining three months ending December 31, 2018 and the succeeding four years:



	Amount
	(in thousands)
Year ending December 31,
2018	$	2,890
2019	10,479
2020	8,724
2021	7,264
2022	5,880