Goodwill and Acquired Intangible Assets

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

The following table presents changes in the carrying amount of goodwill:



	For the Year Ended December 31,
(In thousands)	2018		2017		2016
Beginning of year	$	147,578	$	64,649	$	25,211
Changes from business combinations	57,175		82,929		39,438
Total	$	204,753	$	147,578	$	64,649

The Company performs an analysis for goodwill impairment on an annual basis. Based on the analysis performed in the fourth quarter, the Company has concluded goodwill was not impaired as of December 31, 2018 and 2017.

Acquired intangible assets consist of core deposit intangibles ("CDI"), which are intangible assets arising from the purchase of deposits separately or from bank acquisitions. The change in balance for CDI is as follows:



	For the Year Ended December 31,
(In thousands)	2018			2017			2016
Beginning of year	$	18,937		$	14,572		$	8,594
Acquired CDI	10,170			7,726			8,464
Amortization expense	(4,300		)	(3,361		)	(2,486		)
End of year	$	24,807		$	18,937		$	14,572

(In months)
Remaining average amortization period for CDI	58			63			64

The gross carrying amount and accumulated amortization of the Company's CDI subject to amortization as of:



	December 31, 2018					December 31, 2017
(In thousands)	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Deposit base	$	36,691	$	(11,884	)	$	26,522	$	(7,585	)

The annual amortization expense for the Company's CDI determined using the straight line method for each of the five years subsequent to December 31, 2018 is $5.9 million, $5.8 million, $4.6 million, $4.1 million and $3.0 million, respectively.

Mortgage servicing rights ("MSRs") retained from the sale of Small Business Administration ("SBA") guarantees totaled $1.1 million and $0.2 million at December 31, 2018 and 2017, respectively.

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

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