Mergers & Acquisitions - Pro Forma Summary (Details) - Bank of Idaho - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Pro Forma Information
Net interest income and non-interest income	$ 245,536	$ 212,305	$ 482,951	$ 422,302
Net income	$ 48,065	$ 47,294	$ 106,579	$ 82,988

Amount, after tax, of pro forma income (loss) of combined entity as if acquisition date of business combination occurred as of beginning of period.

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