GOODWILL (Tables)
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9 Months Ended |
Sep. 30, 2026 |
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| Intangible Asset, Goodwill and Other [Abstract] |
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| Changes in Carrying Amount of Goodwill |
Changes in the carrying amount of goodwill for the three and nine months ended September 30, 2026 and September 30, 2025 were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three months ended | | Nine months ended | | | September 30, | | September 30, | | (Dollars in thousands) | | 2026 | | 2025 | | 2026 | | 2025 | | Balance at beginning of period | | $ | 1,099,936 | | | $ | 1,007,656 | | | $ | 1,099,524 | | | $ | 1,007,656 | | | Goodwill resulting from business combinations | | 0 | | | 0 | | | 412 | | | 0 | | | Balance at end of period | | $ | 1,099,936 | | | $ | 1,007,656 | | | $ | 1,099,936 | | | $ | 1,007,656 | |
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| Intangible Asset, Finite-Lived [Table Text Block] |
The unamortized customer list intangible assets and corresponding remaining useful lives are as follows:
| | | | | | | | | | | | | | | | | | | | | | (dollars in thousands) | | September 30, 2026 | | | Bannockburn | | Summit | | Agile | | Unamortized customer list intangible | | $ | 14,036 | | | $ | 18,211 | | | $ | 2,176 | | | Remaining useful life | | 3.9 years | | 7.3 years | | 10.4 years | | | | | | | | | (dollars in thousands) | | December 31, 2025 | | | Bannockburn | | Summit | | Agile | | Unamortized customer list intangible | | $ | 16,723 | | | $ | 20,095 | | | $ | 2,333 | | | Remaining useful life | | 4.7 years | | 8.0 years | | 11.2 years |
The gross carrying amount and accumulated amortization of other intangible assets at September 30, 2026 and December 31, 2025 were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | (Dollars in thousands) | | September 30, 2026 | | December 31, 2025 | | | Gross
carrying
amount | | Accumulated
amortization | | Gross
carrying
amount | | Accumulated
amortization | | Core deposit intangibles | | $ | 121,806 | | | $ | (50,731) | | | $ | 88,814 | | | $ | (36,777) | | | Customer lists | | 72,278 | | | (37,855) | | | 72,278 | | | (33,127) | | | Other | | 9,269 | | | (3,754) | | | 9,269 | | | (3,654) | | | Mortgage servicing rights | | 36,838 | | | (12,774) | | | 33,013 | | | (10,984) | | | Total | | $ | 240,191 | | | $ | (105,114) | | | $ | 203,374 | | | $ | (84,542) | |
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| Intangible Asset, Finite-Lived [Line Items] |
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| Intangible Asset, Finite-Lived [Table Text Block] |
The unamortized customer list intangible assets and corresponding remaining useful lives are as follows:
| | | | | | | | | | | | | | | | | | | | | | (dollars in thousands) | | September 30, 2026 | | | Bannockburn | | Summit | | Agile | | Unamortized customer list intangible | | $ | 14,036 | | | $ | 18,211 | | | $ | 2,176 | | | Remaining useful life | | 3.9 years | | 7.3 years | | 10.4 years | | | | | | | | | (dollars in thousands) | | December 31, 2025 | | | Bannockburn | | Summit | | Agile | | Unamortized customer list intangible | | $ | 16,723 | | | $ | 20,095 | | | $ | 2,333 | | | Remaining useful life | | 4.7 years | | 8.0 years | | 11.2 years |
The gross carrying amount and accumulated amortization of other intangible assets at September 30, 2026 and December 31, 2025 were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | | (Dollars in thousands) | | September 30, 2026 | | December 31, 2025 | | | Gross
carrying
amount | | Accumulated
amortization | | Gross
carrying
amount | | Accumulated
amortization | | Core deposit intangibles | | $ | 121,806 | | | $ | (50,731) | | | $ | 88,814 | | | $ | (36,777) | | | Customer lists | | 72,278 | | | (37,855) | | | 72,278 | | | (33,127) | | | Other | | 9,269 | | | (3,754) | | | 9,269 | | | (3,654) | | | Mortgage servicing rights | | 36,838 | | | (12,774) | | | 33,013 | | | (10,984) | | | Total | | $ | 240,191 | | | $ | (105,114) | | | $ | 203,374 | | | $ | (84,542) | |
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