CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	$ (21,034)	$ 8,392
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Net gain on sales of securities available-for-sale and other assets	(710)	(8)
Net (gain) loss on equity securities	(131)	472
Net gain on sale of loans held for sale	(887)	(315)
Net depreciation, amortization and accretion	(977)	1,294
Stock-based compensation	836	671
Provision for credit losses	15,779	8,012
Originations of loans held for sale	(12,868)	(6,217)
Proceeds from sale of loans originated for sale	20,291	8,103
Increase in cash surrender value of BOLI	(1,340)	(756)
Gain from death benefits from BOLI	0	(1,131)
Deferred income tax benefit	(12,704)	(2,090)
Decrease in other assets	89,179	1,530
(Decrease) increase in other liabilities	(84,352)	2,515
Net cash (used in) provided by operating activities	(8,918)	20,472
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities available-for-sale	134,558	4,199
Proceeds from sales of marketable equity securities	6,101	137
Purchases of securities available-for-sale	(327,222)	(33,244)
Acquisition of marketable equity securities	0	(113)
Proceeds from calls and principal repayments of securities available-for-sale	214,029	32,312
Purchase of BOLI	0	(20,000)
Loans purchased	0	(892)
Proceeds from the sale of portfolio loans transferred to held for sale	3,900
Net (increase) decrease in loans	(326,077)	131,569
Purchases of fixed assets, net	1,651	(1,034)
Sales (purchases) of FHLBNY capital stock, net	39,006	(1,127)
Net cash received in business combination	715,988	0
Net cash provided by investing activities	461,934	111,807
CASH FLOWS FROM FINANCING ACTIVITIES:
Increase (decrease) in deposits	870,519	(3,183)
Repayments of FHLBNY advances, long-term	(140,150)	(3,615,520)
(Repayments) proceeds of FHLBNY advances, short-term, net	(745,000)	3,640,570
Proceeds (repayments) of other short-term borrowings, net	6,763	(110,000)
Proceeds from preferred stock issuance, net	0	72,224
Proceeds from exercise of stock options	372
Release of stock for benefit plan awards	192
Payments related to tax withholding for equity awards	0	(79)
BMP ESOP shares received to satisfy distribution of retirement benefits	(993)
Treasury shares repurchased	0	(20,711)
Cash dividends paid to preferred stockholders	(1,821)
Cash dividends paid to common stockholders	(9,778)	(4,915)
Net cash used in financing activities	(19,896)	(41,614)
Increase in cash and cash equivalents	433,120	90,665
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	243,603	155,488
CASH AND CASH EQUIVALENTS, END OF PERIOD	676,723	246,153
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for income taxes	4,625	955
Cash paid for interest	8,624	16,881
Loans transferred to held for sale	18,144	2,509
Transfer of cash surrender value for BOLI to other assets	0	$ 3,016
Cumulative change due to CECL adoption	1,686
Net non-cash liabilities assumed in Merger	$ 324,479