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Goodwill and Other Intangible Assets - Amortization expense (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Estimated amortization expense
Net carrying amount	$ 364,686	$ 386,326
Other intangibles, excluding the SBA servicing assets
Estimated amortization expense
June 30, 2026	21,041
September 30, 2026	20,628
December 31, 2026	20,628
March 31, 2027	18,517
June 30, 2027	18,188
Thereafter	260,508
Net carrying amount	$ 359,510

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