CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 103,996	$ 42,318	$ 36,186
Adjustments to reconcile net income to net cash provided by operating activities:
Net gain on sales of securities available-for-sale and other assets	(1,705)	(4,592)	(31)
Net gain on equity securities	(131)	(361)	(531)
Net gain on sale of loans held for sale	(24,791)	(3,002)	(1,540)
Loss on termination of derivatives	16,505	6,596
Net depreciation, amortization and accretion	7,805	5,069	5,075
Amortization of other intangible assets	2,622	0	0
Stock-based compensation	5,407	7,223	1,843
Provision for credit losses	6,212	26,165	17,340
Originations of loans held for sale	(48,610)	(50,359)	(23,154)
Proceeds from sale of loans originated for sale	77,184	62,383	38,666
Increase in cash surrender value of BOLI	(6,721)	(3,725)	(2,830)
Gain from death benefits from BOLI	(350)	(1,134)
Deferred income tax benefit	8,596	(1,965)	(2,383)
Decrease (increase) in other assets	118,641	(13,106)	3,186
Decrease in other liabilities	(118,333)	(11,578)	(3,336)
Net cash provided by operating activities	146,327	59,932	68,491
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities available-for-sale	138,077	94,252	148,857
Proceeds from sales of marketable equity securities	6,101	546	570
Purchases of securities available-for-sale	(1,095,028)	(219,621)	(317,656)
Purchases of securities held-to-maturity	(40,249)
Acquisition of marketable equity securities	0	(261)	(266)
Proceeds from calls and principal repayments of securities available-for-sale	411,031	153,119	129,680
Proceeds from calls and principal repayments of securities held-to-maturity	1,360
Purchase of BOLI	(40,000)	(40,000)
Proceeds received from cash surrender value of BOLI	1,464	3,020
Loans purchased	(9,855)	(29,892)
Proceeds from the sale of portfolio loans transferred to held for sale	684,898	47,830	9,684
Net decrease (increase) in loans	282,683	(327,736)	18,953
Purchases of fixed assets, net		(954)	(1,719)
Purchases of fixed assets, net	14
Redemptions (purchases) of restricted stock, net	46,337	(4,688)	1,532
Net cash received in business combination	715,988
Net cash provided by (used in) investing activities	1,102,821	(324,385)	(10,365)
CASH FLOWS FROM FINANCING ACTIVITIES:
Increase (decrease) in deposits	518,682	176,027	(82,882)
(Repayments) proceeds from FHLBNY advances, short-term, net	(1,228,865)	127,500	240,500
Repayments of FHLBNY advances, long-term	(190,150)	(113,190)	(470,050)
Proceeds from FHLBNY advances, long-term	25,000	97,450	196,450
(Repayments) proceeds of other short-term borrowings, net	(118,138)	10,000	110,000
Proceeds from preferred stock issuance, net		116,569
Proceeds from exercise of stock options	431	38	367
Release of stock for benefit plan awards	1,153	84	131
Payments related to tax withholding for equity awards	(111)	(3,060)	(133)
BMP ESOP shares received to satisfy distribution of retirement benefits	(993)		(4)
Treasury shares repurchased	(59,280)	(35,356)	(24,191)
Redemption of REIT preferred stock	(121)
Cash dividends paid to preferred stockholders	(7,286)	(4,783)
Cash dividends paid to common stockholders	(39,351)	(18,711)	(20,082)
Net cash (used in) provided by financing activities	(1,099,029)	352,568	(49,894)
Increase (decrease) in cash and cash equivalents	150,119	88,115	8,232
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	243,603	155,488	147,256
CASH AND CASH EQUIVALENTS, END OF PERIOD	393,722	243,603	155,488
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for income taxes	34,771	15,755	11,944
Cash paid for interest	28,460	59,138	92,707
Securities transferred to held-to-maturity	140,399
Loans transferred to held for sale	692,751	62,243	22,921
Premises transferred to (from) held for sale	2,799		514
Premises transferred from held for sale		(514)
Operating lease assets in exchange for operating lease liabilities	9,769	$ 1,524	$ 49,747
Cumulative change due to Current Expected Credit Loss ("CECL") Standard adoption	1,686
Net non-cash liabilities assumed in Merger (See Note 2)	$ 324,937