Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities
Net (loss) income	$ (51)	$ 36,261
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization of premises and equipment	2,423	2,185
Provision for credit losses	39,200	6,500
Loss on bank owned life insurance policy exchange	327	0
Amortization of intangibles	1,530	642
Net accretion of loans	(3,745)	(472)
Accretion on bank premises	(24)	(24)
Amortization (accretion) on deposits	233	(65)
Amortization on borrowings, net	11	11
Stock-based compensation	2,515	2,097
(Gains) losses on equity securities, net	(876)	123
Gains on sale of loans held-for-sale, net	(513)	(1,783)
Loans originated for resale	(10,798)	(12,511)
Proceeds from sale of loans held-for-sale	11,027	13,859
Increase in cash surrender value of bank owned life insurance	(3,671)	(3,341)
Amortization of premium and accretion of discounts on securities available-for-sale	(56)	401
Amortization of subordinated debentures issuance costs	282	253
(Increase) decrease in accrued interest receivable	(1,736)	846
Net change in operating leases	1,060	(88)
(Increase) decrease in other assets	(15,950)	1,176
Increase (decrease) in other liabilities	160	(3,251)
Net cash provided by operating activities	21,348	42,819
Cash flows from investing activities
Purchases	(330,264)	(48,814)
Sales	277,477	0
Maturities, calls and principal repayments	48,258	30,209
Purchase of equity securities	(1,113)	(1,302)
Proceeds from equity securities sold	2,374	0
Net redemptions of restricted investment in bank stocks	15,477	8,054
Net decrease in loans	32,031	181,281
Proceeds from bank owned life insurance	278	0
Purchases of premises and equipment	(331)	(263)
Cash acquired, net of cash consideration paid in acquisition	54,861	0
Net cash provided by investing activities	99,048	169,165
Cash flows from financing activities
Net increase in deposits	206,993	39,877
Proceeds from issuance of subordinated debt	200,000	0
Payment of subordinated debt issuance costs	(3,726)	0
Advances of FHLB borrowings	740,000	595,587
Repayments of FHLB borrowings	(1,004,621)	(773,033)
Cash dividends on preferred stock	(3,018)	(3,018)
Cash dividends paid on common stock	(13,845)	(13,454)
Repurchase of treasury stock	0	(5,820)
Share redemption for tax withholdings on performance units and deferred stock units earned	(2,134)	(1,324)
Net cash provided by (used in) financing activities	119,649	(161,185)
Net change in cash and cash equivalents	240,045	50,799
Cash and cash equivalents at beginning of period	356,488	242,714
Cash and cash equivalents at end of period	596,533	293,513
Supplemental disclosures of cash flow information
Interest paid on deposits and borrowings	119,053	137,520
Income taxes	36,173	15,594
First of Long Island Corporation [Member]
Supplemental disclosures of cash flow information
Fair value of assets acquired	3,905,094	0
Fair value of liabilities assumed	3,641,505	0
Stock issued in connection with FLIC merger	$ 270,819	$ 0