CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Operating activities:
Net income	$ 69,610	$ 74,930
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	123,345	29,989
Depreciation of premises and equipment	7,785	6,288
Amortization, net	13,695	11,613
(Accretion) amortization related to acquisitions, net	(34,438)	25,913
Losses on securities sales, net	87	6,513
Gain on CRE loan sale	(15,720)	0
BOLI income	(10,864)	(7,037)
Originations and purchases	(184,784)	(90,967)
Proceeds from sales	2,046,402	87,389
Net decrease (increase) in other assets	5,864	(11,299)
Net (decrease) increase in other liabilities	(40,725)	9,319
Net cash provided by operating activities	1,965,957	142,651
Investing activities:
Purchases	(894,303)	(504,305)
Proceeds from sales	629,911	517,517
Proceeds from maturities, calls and paydowns	214,160	117,669
Purchases	(36,640)	0
Proceeds from maturities, calls and paydowns	10,956	24,854
Net change in other investments	29,227	(10,379)
Net increase in LHFI	(143,446)	(579,753)
Net purchases of premises and equipment	(486)	(3,094)
Proceeds from BOLI settlements	2,376	301
Proceeds from sales of foreclosed properties and former bank premises	5,435	0
Net cash received in acquisition	270,211	54,988
Net cash provided by (used in) investing activities	87,401	(382,202)
Financing activities:
Non-interest-bearing deposits	(24,946)	412,655
Interest-bearing deposits	(626,472)	185,967
Short-term borrowings	(261,096)	(229,084)
Repayments of long-term debt	(200,000)	0
Issuance for stock options exercised	0	227
Forward sale common stock issuance	384,963	0
Dividends paid	(84,968)	(58,687)
Vesting of restricted stock, net of shares held for taxes	(6,265)	(3,644)
Net cash provided by financing activities	(818,784)	307,434
Increase in cash and cash equivalents	1,234,574	67,883
Cash, cash equivalents and restricted cash at beginning of the period	354,074	378,131
Cash, cash equivalents and restricted cash at end of the period	1,588,648	446,014
Cash payments for:
Interest	311,469	242,863
Income taxes	2,719	3,278
Supplemental schedule of noncash investing and financing activities
Transfers from bank premises to foreclosed properties	0	8,553
American National
Supplemental schedule of noncash investing and financing activities
Issuance of common stock in exchange for net assets in acquisitions		505,402
Assets acquired		2,948,016
Liabilities assumed		2,724,816
Sandy Spring
Supplemental schedule of noncash investing and financing activities
Issuance of common stock in exchange for net assets in acquisitions	1,275,441
Assets acquired	12,988,972
Liabilities assumed	12,209,862
Cary Street Partners, LLC
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of equity interest	$ (14,300)	$ 0