Acquisition Proforma Net Income (Details) - Enterprise Bancorp, Inc - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Business Combination [Line Items]
Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax	$ 34,262	$ 52,934	$ 129,565	$ 170,053
Business Combination, Pro Forma Information, Pro Forma Revenue	$ 203,344	$ 179,722	$ 575,576	$ 526,439