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Goodwill and Other Intangible Assets
6 Months Ended
Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets
The Company had goodwill of $901.3 million and $898.6 million at June 30, 2021 and December 31, 2020, respectively. The Company recorded adjustments to goodwill associated with the acquisition of Opus in the amount of $2.7 million during the six months ended June 30, 2021, within the one-year measurement period subsequent to the acquisition date of June 1, 2020. These adjustments largely relate to the finalization of the short-year Opus tax returns. During the second quarter of 2021, the Company finalized its fair value analysis of the acquired assets and assumed liabilities associated with the Opus acquisition.
June 30,June 30,
 (Dollars in thousands)20212020
Balance, beginning of year$898,569 $808,322 
Goodwill acquired during the year— 92,844 
Purchase accounting adjustments2,743 — 
Balance, end of year$901,312 $901,166 
Accumulated impairment losses at end of year$— $— 

The Company’s policy is to assess goodwill for impairment on an annual basis during the fourth quarter of each year, and more frequently if events or circumstances lead management to believe the value of goodwill may be impaired.

The Company had other intangible assets of $77.4 million at June 30, 2021, consisting of $74.5 million in core deposit intangibles and $2.9 million in customer relationship intangibles. The Company had other intangibles assets of $85.5 million at December 31, 2020, consisting of $82.5 million in core deposit intangibles and $3.0 million in customer relationship intangibles. The following table summarizes the change in the balance of core deposit intangibles and customer relationship intangibles, and the related accumulated amortization for the periods indicated below:

Three Months EndedSix Months Ended
June 30,March 31,June 30,June 30,June 30,
(Dollars in thousands)20212021202020212020
Gross amount of intangible assets:
Beginning balance$145,212 $145,212 $125,945 $145,212 $125,945 
Additions due to acquisitions— — 19,267 — 19,267 
Ending balance145,212 145,212 145,212 145,212 145,212 
Accumulated amortization:
Beginning balance(63,848)(59,705)(46,596)(59,705)(42,633)
Amortization(4,001)(4,143)(4,066)(8,144)(8,029)
Ending balance(67,849)(63,848)(50,662)(67,849)(50,662)
Net intangible assets$77,363 $81,364 $94,550 $77,363 $94,550 

The Company amortizes core deposit intangibles and customer relationship intangibles based on the projected useful lives of the related deposits in the case of core deposit intangibles, and over the projected useful lives of the related client relationships in the case of customer relationship intangibles. The amortization periods typically range from six to eleven years. The estimated aggregate amortization expense related to our core deposit intangible and customer relationship intangible assets for each of the next five years succeeding December 31, 2020, in order from the present, is $15.9 million, $14.0 million, $12.3 million, $11.1 million, and $10.0 million. The Company analyzes core deposit intangibles and customer relationship intangibles annually for impairment, or sooner if events and circumstances indicate possible impairment. Factors that may contribute to impairment include customer attrition and run-off. Management is unaware of any events and/or circumstances that would indicate a possible impairment to the core deposit intangibles or customer relationship intangibles as of June 30, 2021.