CONDENSED HOLDING COMPANY ONLY FINANCIAL STATEMENTS - CONDENSED STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Adjustments to reconcile net income to net cash provided by operating activities:
Net gain on marketable equity securities		$ (131)	$ (361)
Loss on extinguishment of debt	$ 740	1,751	1,104
(Increase) decrease in other assets	(35,170)	125,486	(16,175)
Increase in other liabilities	145,425	(118,333)	(11,578)
Net cash provided by operating activities	295,172	146,327	59,932
Cash flows from Investing Activities:
Proceeds from sales of marketable equity securities		6,101	546
Acquisition of marketable equity securities			(261)
Net cash received in business combination		715,988
Net cash (used in) provided by investing activities	(1,332,191)	1,102,821	(324,385)
Cash flows from Financing Activities:
Proceeds from subordinated debentures issuance, net	157,559
Redemption of subordinated debentures	(155,000)
Proceeds from preferred stock issuance, net			116,569
Proceeds from exercise of stock options		431	38
Release of stock for benefit plan awards	1,167	1,153	84
Payments related to tax withholding for equity awards	(1,558)	(111)	(3,060)
BMP Employee Stock Ownership Plan shares received to satisfy distribution of retirement benefits		(993)
Purchase of treasury stock	(46,762)	(59,280)	(35,356)
Cash dividends paid to preferred stockholders	(7,286)	(7,286)	(4,783)
Cash dividends paid to common stockholders	(36,791)	(39,351)	(18,711)
Net cash provided by (used in) financing activities	812,594	(1,099,029)	352,568
(Decrease) increase in cash and cash equivalents	(224,425)	150,119	88,115
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	393,722	243,603	155,488
CASH AND CASH EQUIVALENTS, END OF PERIOD	169,297	393,722	243,603
Parent Company
Cash flows from Operating Activities:
Net income	152,556	103,996	42,318
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed earnings of subsidiaries	(65,669)	(92,597)	(16,461)
Net gain on marketable equity securities		(131)	(361)
Net accretion	(111)	(157)	146
Loss on extinguishment of debt	740
(Increase) decrease in other assets	(104)	761	(502)
Increase in other liabilities	(1,096)	269	214
Net cash provided by operating activities	86,316	12,141	25,354
Cash flows from Investing Activities:
Proceeds from sales of marketable equity securities		6,101	546
Acquisition of marketable equity securities		(3,000)	(261)
Reimbursement from subsidiary, including purchases of investment securities available-for-sale			2
Net cash received in business combination		11,545
Net cash (used in) provided by investing activities		14,646	287
Cash flows from Financing Activities:
Proceeds from subordinated debentures issuance, net	157,559
Redemption of subordinated debentures	(155,000)
Redemption of preferred stock			(3)
Proceeds from preferred stock issuance, net			116,569
Proceeds from exercise of stock options		431	38
Release of stock for benefit plan awards	1,167	1,153	84
Payments related to tax withholding for equity awards	(1,558)	(111)	(3,060)
BMP Employee Stock Ownership Plan shares received to satisfy distribution of retirement benefits		(993)
Purchase of treasury stock	(46,762)	(59,280)	(35,356)
Cash dividends paid to preferred stockholders	(7,286)	(7,286)	(4,783)
Cash dividends paid to common stockholders	(36,791)	(39,351)	(18,696)
Net cash provided by (used in) financing activities	(88,671)	(105,437)	54,793
(Decrease) increase in cash and cash equivalents	(2,355)	(78,650)	80,434
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	27,364	106,014	25,580
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 25,009	$ 27,364	$ 106,014