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Goodwill and Other Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangibles
Changes in the carrying amount and accumulated amortization of the Company’s core deposit premiums and other intangible assets at March 31, 2024 and December 31, 2023 were as follows: 
March 31,December 31,
(In thousands)20242023
Core deposit premiums:
Balance, beginning of year$101,344 $116,016 
Amortization(3,442)(14,672)
Balance, end of period97,902 101,344 
Books of business and other intangibles:
Balance, beginning of year11,301 12,935 
Amortization(408)(1,634)
Balance, end of period10,893 11,301 
Total other intangible assets, net$108,795 $112,645 
The carrying basis and accumulated amortization of the Company’s other intangible assets at March 31, 2024 and December 31, 2023 were as follows: 
March 31,December 31,
(In thousands)20242023
Core deposit premiums:
Gross carrying amount$177,624 $187,467 
Accumulated amortization(79,722)(86,123)
Core deposit premiums, net97,902 101,344 
Books of business and other intangibles:
Gross carrying amount22,068 22,068 
Accumulated amortization(11,175)(10,767)
Books of business and other intangibles, net10,893 11,301 
Total other intangible assets, net$108,795 $112,645 
Estimated Remaining Amortization Expense
The Company’s estimated remaining amortization expense on other intangible assets as of March 31, 2024 is as follows: 
(In thousands)YearAmortization
Expense
 Remainder of 2024$11,553 
 202512,819 
 202612,346 
 202712,218 
 202811,312 
 Thereafter48,547 
 Total$108,795