CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 147,357	$ 110,076	$ 63,309
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of premises and equipment	11,683	9,357	8,453
Allocation of ESOP stock	2,506	2,197	1,135
Stock compensation	6,638	5,415	4,258
Net excess tax expense on stock compensation	216	93	123
Amortization of core deposit intangible	4,718	5,453	6,186
Net accretion of purchase accounting adjustments	(9,752)	(14,484)	(21,557)
Amortization of servicing asset	77	72	93
Net premium amortization in excess of discount accretion on securities	7,164	8,466	2,997
Net amortization of deferred costs on borrowings	548	824	553
Net amortization of deferred costs and discounts on loans	1,129	1,242	4,872
Credit loss expense (benefit)	7,768	(11,832)	59,404
Deferred tax provision (benefit)	1,777	3,608	(4,615)
Net gain on sale and write-down of other real estate owned	(54)	0	(390)
Net write-down of fixed assets held-for-sale to net realizable value	1,482	7,787	3,853
Net gain on sale of fixed assets	(38)	0	(6)
Net gain on equity investments	(9,685)	(7,145)	(21,214)
Net gain on sales of loans	(358)	(3,186)	(8,278)
Proceeds from sales of residential loans held for sale	12,616	102,648	171,263
Residential loans originated for sale	(13,158)	(53,938)	(213,428)
Increase in value of bank owned life insurance	(6,578)	(6,832)	(6,424)
Net gain on sale of assets held for sale	(1,959)	(318)	(21)
(Increase) decrease in interest and dividends receivable	(12,098)	2,663	(9,434)
(Increase) decrease in other assets	(80,233)	33,093	17,030
Increase (decrease) in other liabilities	178,684	(35,287)	74,494
Total adjustments	103,093	49,896	69,347
Net cash provided by operating activities	250,450	159,972	132,656
Cash flows from investing activities:
Net increase in loans receivable	(1,126,997)	(556,449)	(428,444)
Purchases of loans receivable	(171,623)	(301,954)	0
Premiums paid on purchased loan pools	(866)	(8,874)	0
Proceeds from sale of loans	13,388	825	449,462
Purchase of debt securities available-for-sale	(69,493)	(510,070)	(77,519)
Purchase of debt securities held-to-maturity	(249,751)	(447,447)	(224,073)
Purchase of equity investments	(9,366)	(86,462)	(96,519)
Proceeds from maturities and calls of debt securities available-for-sale	104,449	103,720	43,503
Proceeds from maturities and calls of debt securities held-to-maturity	30,241	38,042	53,959
Proceeds from sales of debt securities available-for-sale	30,257	3,000	10,598
Proceeds from sales of debt securities held-to-maturity	0	0	12,450
Proceeds from sales of equity investments	19,234	98,777	16,978
Principal repayments on debt securities available-for-sale	0	0	306
Principal repayments on debt securities held-to-maturity	135,417	215,734	186,687
Proceeds from bank owned life insurance	4,182	12,878	1,022
Proceeds from the redemption of restricted equity investments	234,627	2,200	78,190
Purchases of restricted equity investments	(290,710)	(3,267)	(59,525)
Proceeds from sales of other real estate owned	160	0	855
Proceeds from sales of assets held-for-sale	8,130	3,544	1,169
Purchases of premises and equipment	(16,107)	(42,039)	(14,728)
Purchases of operating lease equipment	(4,789)	0	0
Cash consideration received for acquisition	38,609	0	23,460
Net cash used in investing activities	(1,321,008)	(1,477,842)	(22,169)
Cash flows from financing activities:
Net (decrease) increase in deposits	(56,963)	407,569	1,507,943
Net payment for sale of branches	0	(86,282)	0
Decrease in short-term borrowings	(49,672)	(9,685)	(226,018)
Net proceeds from FHLB advances	1,211,166	0	525,000
Repayments of FHLB advances	0	0	(840,200)
Net proceeds from issuance of subordinated notes	0	0	122,180
Proceeds from Federal Reserve Bank advances	0	0	53,778
Repayments from Federal Reserve Bank advances	0	0	(53,778)
Repayments of other borrowings	(35,104)	(7,612)	(8,109)
Increase (decrease) in advances by borrowers for taxes and insurance	1,100	3,009	(2,803)
Exercise of stock options	424	1,946	1,241
Payment of employee taxes withheld from stock awards	(1,502)	(1,183)	(2,084)
Purchase of treasury stock	(7,396)	(36,059)	(14,814)
Net proceeds from the issuance of preferred stock	0	0	55,529
Acquisition of common stock by ESOP	0	(3,200)	0
Dividends paid	(47,511)	(44,510)	(42,917)
Distributions to non-controlling interest	(782)	0	0
Net cash provided by financing activities	1,013,760	223,993	1,074,948
Net (decrease) increase in cash and due from banks and restricted cash	(56,798)	(1,093,877)	1,185,435
Cash and due from banks and restricted cash at beginning of year	224,784	1,318,661	133,226
Supplemental disclosure of cash flow information:
Cash and due from banks at beginning of year	204,949	1,272,134	120,544
Restricted cash at beginning of year	19,835	46,527	12,682
Cash and due from banks at end of year	167,946	204,949	1,272,134
Restricted cash at end of year	40	19,835	46,527
Cash and due from banks and restricted cash at end of year	167,986	224,784	1,318,661
Cash paid during the year for:
Interest	49,700	37,381	66,454
Income taxes	25,383	50,524	5,742
Non-cash activities:
Accretion of unrealized loss on securities reclassified to held-to-maturity	590	667	756
Net loan (recoveries) charge-offs	(340)	(442)	18,859
Transfer of premises and equipment to assets held-for-sale	2,776	4,035	3,953
Transfer of debt securities from available-for-sale to held-to-maturity	0	12,721	0
Transfer of loans receivable to other real estate owned	0	0	106
Transfer of loans receivable to loans held-for-sale	13,178	0	444,543
Non-cash assets acquired:
Securities	0	0	208,880
Restricted equity investments	0	0	5,334
Loans	0	0	1,558,480
Other current assets	238	0	0
Premises and equipment	18	0	9,744
Right of use ("ROU") asset	779	0	0
Accrued interest receivable	0	0	4,161
Bank owned life insurance	0	0	22,440
Deferred tax asset	0	0	41
Other assets	81	0	10,073
Goodwill and other intangible assets, net	5,827	0	139,501
Total non-cash assets acquired	6,943	0	1,958,654
Liabilities assumed:
Deposits	0	0	1,594,403
Borrowings	0	0	92,618
Lease liability	779	0	0
Other liabilities	43,937	0	33,648
Total liabilities assumed	$ 44,716	$ 0	$ 1,720,669