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LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Schedule of Loans by Risk Rating (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Allowance for loan losses
Total	$ 8,335,309	$ 6,825,847
Commercial loans | Construction
Allowance for loan losses
Origination year - current fiscal year	153,393	71,784
Origination year - 1 year before current fiscal year	133,708	52,725
Origination year - 2 years prior to current fiscal year	25,634	117,784
Origination year - 3 years prior to current fiscal year	3,432	76,379
Origination year - 4 years prior to current fiscal year	1,361	3,839
Prior	1,924	1,721
Revolving Loans Amortized Cost Basis	0	50
Revolving Loans Converted to Term	0	0
Total	319,452	324,282
Commercial loans | Commercial multifamily
Allowance for loan losses
Origination year - current fiscal year	205,124	63,630
Origination year - 1 year before current fiscal year	61,032	30,872
Origination year - 2 years prior to current fiscal year	30,211	98,455
Origination year - 3 years prior to current fiscal year	100,696	65,318
Origination year - 4 years prior to current fiscal year	73,187	76,699
Prior	149,633	180,250
Revolving Loans Amortized Cost Basis	205	593
Revolving Loans Converted to Term	0	0
Total	620,088	515,817
Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Origination year - current fiscal year	132,099	154,434
Origination year - 1 year before current fiscal year	127,392	50,761
Origination year - 2 years prior to current fiscal year	59,253	88,669
Origination year - 3 years prior to current fiscal year	82,858	94,577
Origination year - 4 years prior to current fiscal year	76,378	48,238
Prior	159,045	166,592
Revolving Loans Amortized Cost Basis	3,464	3,206
Revolving Loans Converted to Term	0	0
Total	640,489	606,477
Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Origination year - current fiscal year	621,685	426,086
Origination year - 1 year before current fiscal year	410,359	183,981
Origination year - 2 years prior to current fiscal year	182,693	300,457
Origination year - 3 years prior to current fiscal year	347,406	360,363
Origination year - 4 years prior to current fiscal year	348,734	239,817
Prior	567,514	626,615
Revolving Loans Amortized Cost Basis	17,846	19,610
Revolving Loans Converted to Term	0	0
Total	2,496,237	2,156,929
Commercial and industrial loans
Allowance for loan losses
Origination year - current fiscal year	282,985	188,129
Origination year - 1 year before current fiscal year	153,377	134,705
Origination year - 2 years prior to current fiscal year	61,810	134,586
Origination year - 3 years prior to current fiscal year	77,446	164,680
Origination year - 4 years prior to current fiscal year	96,706	57,643
Prior	103,134	139,670
Revolving Loans Amortized Cost Basis	669,778	465,016
Revolving Loans Converted to Term	0	0
Total	1,445,236	1,284,429
Residential real estate | Residential real estate
Allowance for loan losses
Origination year - current fiscal year	997,981	215,545
Origination year - 1 year before current fiscal year	280,956	114,536
Origination year - 2 years prior to current fiscal year	96,996	87,139
Origination year - 3 years prior to current fiscal year	71,973	171,506
Origination year - 4 years prior to current fiscal year	140,953	192,643
Prior	723,423	707,586
Revolving Loans Amortized Cost Basis	165	293
Revolving Loans Converted to Term	0	0
Total	2,312,447	1,489,248
Consumer loans | Home equity
Allowance for loan losses
Origination year - current fiscal year	0	125
Origination year - 1 year before current fiscal year	114	469
Origination year - 2 years prior to current fiscal year	454	0
Origination year - 3 years prior to current fiscal year	0	0
Origination year - 4 years prior to current fiscal year	0	0
Prior	17	24
Revolving Loans Amortized Cost Basis	226,865	251,748
Revolving Loans Converted to Term	0	0
Total	227,450	252,366
Consumer loans | Consumer other
Allowance for loan losses
Origination year - current fiscal year	161,745	38,002
Origination year - 1 year before current fiscal year	28,416	11,235
Origination year - 2 years prior to current fiscal year	8,356	21,838
Origination year - 3 years prior to current fiscal year	12,950	56,374
Origination year - 4 years prior to current fiscal year	28,085	31,378
Prior	25,249	29,936
Revolving Loans Amortized Cost Basis	9,109	7,536
Revolving Loans Converted to Term	0	0
Total	273,910	196,299
Pass | Commercial loans | Construction
Allowance for loan losses
Origination year - current fiscal year	153,393	71,784
Origination year - 1 year before current fiscal year	133,708	52,725
Origination year - 2 years prior to current fiscal year	25,634	117,784
Origination year - 3 years prior to current fiscal year	3,432	66,950
Origination year - 4 years prior to current fiscal year	1,361	3,839
Prior	1,924	1,721
Revolving Loans Amortized Cost Basis	0	50
Revolving Loans Converted to Term	0	0
Total	319,452	314,853
Pass | Commercial loans | Commercial multifamily
Allowance for loan losses
Origination year - current fiscal year	205,124	63,630
Origination year - 1 year before current fiscal year	61,032	28,172
Origination year - 2 years prior to current fiscal year	27,583	98,455
Origination year - 3 years prior to current fiscal year	100,696	59,720
Origination year - 4 years prior to current fiscal year	67,675	76,699
Prior	149,633	176,020
Revolving Loans Amortized Cost Basis	205	457
Revolving Loans Converted to Term	0	0
Total	611,948	503,153
Pass | Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Origination year - current fiscal year	131,096	154,434
Origination year - 1 year before current fiscal year	127,270	50,236
Origination year - 2 years prior to current fiscal year	58,835	85,687
Origination year - 3 years prior to current fiscal year	82,576	91,316
Origination year - 4 years prior to current fiscal year	75,322	45,995
Prior	154,056	157,346
Revolving Loans Amortized Cost Basis	3,464	3,206
Revolving Loans Converted to Term	0	0
Total	632,619	588,220
Pass | Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Origination year - current fiscal year	621,685	426,086
Origination year - 1 year before current fiscal year	410,359	176,172
Origination year - 2 years prior to current fiscal year	175,456	296,985
Origination year - 3 years prior to current fiscal year	333,783	349,947
Origination year - 4 years prior to current fiscal year	313,124	204,043
Prior	530,322	585,044
Revolving Loans Amortized Cost Basis	17,846	19,511
Revolving Loans Converted to Term	0	0
Total	2,402,575	2,057,788
Pass | Commercial and industrial loans
Allowance for loan losses
Origination year - current fiscal year	282,781	187,257
Origination year - 1 year before current fiscal year	147,070	130,520
Origination year - 2 years prior to current fiscal year	56,880	114,153
Origination year - 3 years prior to current fiscal year	67,975	156,443
Origination year - 4 years prior to current fiscal year	83,223	54,190
Prior	99,367	136,837
Revolving Loans Amortized Cost Basis	648,956	424,393
Revolving Loans Converted to Term	0	0
Total	1,386,252	1,203,793
Pass | Residential real estate | Residential real estate
Allowance for loan losses
Origination year - current fiscal year	997,981	214,306
Origination year - 1 year before current fiscal year	280,308	114,536
Origination year - 2 years prior to current fiscal year	96,548	86,997
Origination year - 3 years prior to current fiscal year	70,845	169,537
Origination year - 4 years prior to current fiscal year	138,894	189,980
Prior	713,744	697,401
Revolving Loans Amortized Cost Basis	165	293
Revolving Loans Converted to Term	0	0
Total	2,298,485	1,473,050
Special Mention | Commercial loans | Construction
Allowance for loan losses
Origination year - current fiscal year	0	0
Origination year - 1 year before current fiscal year	0	0
Origination year - 2 years prior to current fiscal year	0	0
Origination year - 3 years prior to current fiscal year	0	0
Origination year - 4 years prior to current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Special Mention | Commercial loans | Commercial multifamily
Allowance for loan losses
Origination year - current fiscal year	0	0
Origination year - 1 year before current fiscal year	0	2,700
Origination year - 2 years prior to current fiscal year	2,628	0
Origination year - 3 years prior to current fiscal year	0	5,598
Origination year - 4 years prior to current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	2,628	8,298
Special Mention | Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Origination year - current fiscal year	0	0
Origination year - 1 year before current fiscal year	0	525
Origination year - 2 years prior to current fiscal year	387	869
Origination year - 3 years prior to current fiscal year	0	1,668
Origination year - 4 years prior to current fiscal year	0	1,405
Prior	0	1,157
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	387	5,624
Special Mention | Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Origination year - current fiscal year	0	0
Origination year - 1 year before current fiscal year	0	221
Origination year - 2 years prior to current fiscal year	0	3,472
Origination year - 3 years prior to current fiscal year	0	7,632
Origination year - 4 years prior to current fiscal year	20,000	2,302
Prior	18,462	27,268
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	38,462	40,895
Special Mention | Commercial and industrial loans
Allowance for loan losses
Origination year - current fiscal year	0	661
Origination year - 1 year before current fiscal year	5,811	1,691
Origination year - 2 years prior to current fiscal year	1,290	10,824
Origination year - 3 years prior to current fiscal year	1,332	5,092
Origination year - 4 years prior to current fiscal year	11,502	1,433
Prior	912	488
Revolving Loans Amortized Cost Basis	2,632	22,468
Revolving Loans Converted to Term	0	0
Total	23,479	42,657
Special Mention | Residential real estate | Residential real estate
Allowance for loan losses
Origination year - current fiscal year	0	0
Origination year - 1 year before current fiscal year	364	0
Origination year - 2 years prior to current fiscal year	0	0
Origination year - 3 years prior to current fiscal year	861	120
Origination year - 4 years prior to current fiscal year	202	502
Prior	707	1,557
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	2,134	2,179
Substandard | Commercial loans | Construction
Allowance for loan losses
Origination year - current fiscal year	0	0
Origination year - 1 year before current fiscal year	0	0
Origination year - 2 years prior to current fiscal year	0	0
Origination year - 3 years prior to current fiscal year	0	9,429
Origination year - 4 years prior to current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	9,429
Substandard | Commercial loans | Commercial multifamily
Allowance for loan losses
Origination year - current fiscal year	0	0
Origination year - 1 year before current fiscal year	0	0
Origination year - 2 years prior to current fiscal year	0	0
Origination year - 3 years prior to current fiscal year	0	0
Origination year - 4 years prior to current fiscal year	5,512	0
Prior	0	4,230
Revolving Loans Amortized Cost Basis	0	136
Revolving Loans Converted to Term	0	0
Total	5,512	4,366
Substandard | Commercial real estate loans | Commercial real estate owner occupied
Allowance for loan losses
Origination year - current fiscal year	1,003	0
Origination year - 1 year before current fiscal year	122	0
Origination year - 2 years prior to current fiscal year	31	2,113
Origination year - 3 years prior to current fiscal year	282	1,593
Origination year - 4 years prior to current fiscal year	1,056	838
Prior	4,989	8,089
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	7,483	12,633
Substandard | Commercial real estate loans | Commercial real estate non-owner occupied
Allowance for loan losses
Origination year - current fiscal year	0	0
Origination year - 1 year before current fiscal year	0	7,588
Origination year - 2 years prior to current fiscal year	7,237	0
Origination year - 3 years prior to current fiscal year	13,623	2,784
Origination year - 4 years prior to current fiscal year	15,610	33,472
Prior	18,730	14,303
Revolving Loans Amortized Cost Basis	0	99
Revolving Loans Converted to Term	0	0
Total	55,200	58,246
Substandard | Commercial and industrial loans
Allowance for loan losses
Origination year - current fiscal year	204	211
Origination year - 1 year before current fiscal year	496	2,494
Origination year - 2 years prior to current fiscal year	3,640	9,609
Origination year - 3 years prior to current fiscal year	8,139	3,145
Origination year - 4 years prior to current fiscal year	1,981	2,020
Prior	2,799	2,330
Revolving Loans Amortized Cost Basis	10,581	17,935
Revolving Loans Converted to Term	0	0
Total	27,840	37,744
Substandard | Residential real estate | Residential real estate
Allowance for loan losses
Origination year - current fiscal year	0	1,239
Origination year - 1 year before current fiscal year	284	0
Origination year - 2 years prior to current fiscal year	448	142
Origination year - 3 years prior to current fiscal year	267	1,849
Origination year - 4 years prior to current fiscal year	1,857	2,161
Prior	8,972	8,628
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	11,828	14,019
Doubtful | Commercial and industrial loans
Allowance for loan losses
Origination year - current fiscal year	0	0
Origination year - 1 year before current fiscal year	0	0
Origination year - 2 years prior to current fiscal year	0	0
Origination year - 3 years prior to current fiscal year	0	0
Origination year - 4 years prior to current fiscal year	0	0
Prior	56	15
Revolving Loans Amortized Cost Basis	7,609	220
Revolving Loans Converted to Term	0	0
Total	7,665	235
Performing | Consumer loans | Home equity
Allowance for loan losses
Origination year - current fiscal year	0	125
Origination year - 1 year before current fiscal year	114	469
Origination year - 2 years prior to current fiscal year	454	0
Origination year - 3 years prior to current fiscal year	0	0
Origination year - 4 years prior to current fiscal year	0	0
Prior	17	24
Revolving Loans Amortized Cost Basis	224,746	249,590
Revolving Loans Converted to Term	0	0
Total	225,331	250,208
Performing | Consumer loans | Consumer other
Allowance for loan losses
Origination year - current fiscal year	161,157	37,994
Origination year - 1 year before current fiscal year	28,279	11,189
Origination year - 2 years prior to current fiscal year	8,312	21,548
Origination year - 3 years prior to current fiscal year	12,670	55,577
Origination year - 4 years prior to current fiscal year	27,608	30,632
Prior	24,682	28,797
Revolving Loans Amortized Cost Basis	9,070	7,505
Revolving Loans Converted to Term	0	0
Total	271,778	193,242
Performing | Special Mention
Allowance for loan losses
Total	68,127	100,071
Performing | Substandard
Allowance for loan losses
Total	88,665	106,560
Nonperforming | Consumer loans | Home equity
Allowance for loan losses
Origination year - current fiscal year	0	0
Origination year - 1 year before current fiscal year	0	0
Origination year - 2 years prior to current fiscal year	0	0
Origination year - 3 years prior to current fiscal year	0	0
Origination year - 4 years prior to current fiscal year	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	2,119	2,158
Revolving Loans Converted to Term	0	0
Total	2,119	2,158
Nonperforming | Consumer loans | Consumer other
Allowance for loan losses
Origination year - current fiscal year	588	8
Origination year - 1 year before current fiscal year	137	46
Origination year - 2 years prior to current fiscal year	44	290
Origination year - 3 years prior to current fiscal year	280	797
Origination year - 4 years prior to current fiscal year	477	746
Prior	567	1,139
Revolving Loans Amortized Cost Basis	39	31
Revolving Loans Converted to Term	0	0
Total	$ 2,132	$ 3,057

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