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Pending Acquisition (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2026	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Business Combination [Line Items]
Merger related expense		$ 300	$ 0
Total assets		5,557,509	5,328,428	$ 5,505,720
Total loans		4,244,380		4,212,840
Deposits		4,880,680		4,761,682
Total shareholders' equity		510,553	$ 467,277	$ 502,951	$ 454,686
HCB Financial Corp.
Business Combination [Line Items]
Total assets		597,200
Total loans		369,900
Deposits		545,800
Total shareholders' equity		47,500
HCB Financial Corp.
Business Combination [Line Items]
Merger related expense		$ 300
HCB Financial Corp. | Forecast
Business Combination [Line Items]
Merger consideration	$ 70,200
Termination fee	$ 3,250

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