CREDIT QUALITY ASSESSMENT - Information about Credit Quality Indicator by Year of Origination (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	$ 1,330,252	$ 1,245,085
Year one	878,134	2,958,596
Year two	2,839,941	2,375,873
Year three	2,115,616	1,175,656
Year four	1,003,973	870,390
Prior	2,222,947	1,776,440
Revolving Loans	1,147,103	964,949
Total loans	11,537,966	11,366,989
Current period gross charge-offs, total	4,608	2,614	$ 1,105
Commercial Investor R/E
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	337,754	445,782
Year one	303,462	1,396,438
Year two	1,310,176	1,226,951
Year three	1,097,595	634,361
Year four	545,999	511,146
Prior	1,151,868	865,346
Revolving Loans	32,739	24,401
Total loans	4,779,593	5,104,425
Current period gross charge-offs, current year	0	0
Current period gross charge-offs, year one	0	0
Current period gross charge-offs, year two	0	0
Current period gross charge-offs, year three	357	0
Current period gross charge-offs, year four	0	0
Current period gross charge-offs, prior	44	0
Current period gross charge-offs, revolving loans	0	0
Current period gross charge-offs, total	401	0
Commercial Investor R/E | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	337,754	405,740
Year one	303,462	1,395,973
Year two	1,306,076	1,195,708
Year three	1,064,827	634,361
Year four	521,505	511,146
Prior	1,053,674	848,958
Revolving Loans	32,739	23,653
Total loans	4,620,037	5,015,539
Commercial Investor R/E | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	9,250
Year one	0	0
Year two	4,100	316
Year three	0	0
Year four	18,888	0
Prior	40,437	1,978
Revolving Loans	0	0
Total loans	63,425	11,544
Commercial Investor R/E | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	30,792
Year one	0	465
Year two	0	30,927
Year three	32,768	0
Year four	5,606	0
Prior	57,757	14,410
Revolving Loans	0	748
Total loans	96,131	77,342
Commercial Investor R/E | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Prior	0	0
Revolving Loans	0	0
Total loans	0	0
Commercial Owner- Occupied R/E
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	183,357	139,040
Year one	114,679	364,951
Year two	350,561	321,310
Year three	303,801	239,979
Year four	217,049	243,278
Prior	573,048	441,056
Revolving Loans	6,277	5,621
Total loans	1,748,772	1,755,235
Current period gross charge-offs, current year	0	0
Current period gross charge-offs, year one	0	0
Current period gross charge-offs, year two	0	0
Current period gross charge-offs, year three	0	0
Current period gross charge-offs, year four	0	0
Current period gross charge-offs, prior	0	0
Current period gross charge-offs, revolving loans	0	0
Current period gross charge-offs, total	0	0
Commercial Owner- Occupied R/E | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	183,357	136,072
Year one	109,915	361,247
Year two	346,029	318,269
Year three	286,260	238,761
Year four	212,034	235,145
Prior	542,637	428,846
Revolving Loans	6,277	5,621
Total loans	1,686,509	1,723,961
Commercial Owner- Occupied R/E | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	406
Year one	4,764	70
Year two	3,632	2,240
Year three	14,731	875
Year four	4,043	2,267
Prior	11,027	8,616
Revolving Loans	0	0
Total loans	38,197	14,474
Commercial Owner- Occupied R/E | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	2,562
Year one	0	3,634
Year two	900	801
Year three	2,810	343
Year four	972	5,866
Prior	19,384	3,594
Revolving Loans	0	0
Total loans	24,066	16,800
Commercial Owner- Occupied R/E | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Prior	0	0
Revolving Loans	0	0
Total loans	0	0
Commercial AD&C
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	423,143	335,934
Year one	243,724	289,301
Year two	329,248	178,889
Year three	120,368	28,954
Year four	1,571	0
Prior	1,358	0
Revolving Loans	207,880	155,889
Total loans	1,327,292	988,967
Current period gross charge-offs, current year	0	0
Current period gross charge-offs, year one	0	0
Current period gross charge-offs, year two	135	0
Current period gross charge-offs, year three	0	0
Current period gross charge-offs, year four	0	0
Current period gross charge-offs, prior	0	0
Current period gross charge-offs, revolving loans	0	0
Current period gross charge-offs, total	135	0
Commercial AD&C | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	423,143	334,918
Year one	243,462	288,732
Year two	301,254	178,889
Year three	73,323	28,954
Year four	0	0
Prior	0	0
Revolving Loans	207,880	155,889
Total loans	1,249,062	987,382
Commercial AD&C | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Year one	262	0
Year two	0	0
Year three	4,213	0
Year four	0	0
Prior	0	0
Revolving Loans	0	0
Total loans	4,475	0
Commercial AD&C | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	1,016
Year one	0	569
Year two	27,994	0
Year three	42,832	0
Year four	1,571	0
Prior	1,358	0
Revolving Loans	0	0
Total loans	73,755	1,585
Commercial AD&C | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Prior	0	0
Revolving Loans	0	0
Total loans	0	0
Residential Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	48,709	32,863
Year one	53,563	487,240
Year two	534,492	418,747
Year three	420,196	173,191
Year four	164,577	47,779
Prior	316,052	314,701
Revolving Loans	0	0
Total loans	1,537,589	1,474,521
Current period gross charge-offs, current year	0	0
Current period gross charge-offs, year one	0	0
Current period gross charge-offs, year two	0	43
Current period gross charge-offs, year three	50	0
Current period gross charge-offs, year four	0	10
Current period gross charge-offs, prior	0	107
Current period gross charge-offs, revolving loans	0	0
Current period gross charge-offs, total	50	160
Residential Mortgage | 660-850
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	43,196	31,853
Year one	48,842	476,631
Year two	483,634	394,414
Year three	385,226	166,387
Year four	151,114	41,473
Prior	252,024	266,927
Revolving Loans	0	0
Total loans	1,364,036	1,377,685
Residential Mortgage | 600-659
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	20	781
Year one	1,939	7,022
Year two	18,507	18,284
Year three	9,450	2,009
Year four	2,480	1,882
Prior	20,017	24,040
Revolving Loans	0	0
Total loans	52,413	54,018
Residential Mortgage | 540-599
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Year one	1,193	1,545
Year two	1,305	2,698
Year three	4,011	2,371
Year four	2,601	1,891
Prior	10,946	9,377
Revolving Loans	0	0
Total loans	20,056	17,882
Residential Mortgage | less than 540
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	5,493	229
Year one	1,589	2,042
Year two	31,046	3,351
Year three	21,509	2,424
Year four	8,382	2,533
Prior	33,065	14,357
Revolving Loans	0	0
Total loans	101,084	24,936
Residential Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	17,457	24,059
Year one	8,785	68,773
Year two	12,257	23,216
Year three	7,161	3,978
Year four	1,500	150
Prior	1,458	1,243
Revolving Loans	410	0
Total loans	49,028	121,419
Current period gross charge-offs, current year	0	0
Current period gross charge-offs, year one	0	0
Current period gross charge-offs, year two	0	0
Current period gross charge-offs, year three	0	0
Current period gross charge-offs, year four	0	0
Current period gross charge-offs, prior	0	0
Current period gross charge-offs, revolving loans	0	0
Current period gross charge-offs, total	0	0
Residential Construction | 660-850
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	16,923	21,975
Year one	7,326	68,273
Year two	11,695	21,897
Year three	6,723	2,478
Year four	0	150
Prior	150	0
Revolving Loans	410	0
Total loans	43,227	114,773
Residential Construction | 600-659
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	1,641
Year one	0	500
Year two	0	1,319
Year three	0	1,500
Year four	0	0
Prior	1,308	1,243
Revolving Loans	0	0
Total loans	1,308	6,203
Residential Construction | 540-599
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	521	443
Year one	0	0
Year two	500	0
Year three	0	0
Year four	1,500	0
Prior	0	0
Revolving Loans	0	0
Total loans	2,521	443
Residential Construction | less than 540
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	13	0
Year one	1,459	0
Year two	62	0
Year three	438	0
Year four	0	0
Prior	0	0
Revolving Loans	0	0
Total loans	1,972	0
Commercial Business
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	9,508,792	9,353,507
Commercial Business | Commercial Business
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	302,642	254,338
Year one	143,474	346,152
Year two	297,938	204,481
Year three	164,504	94,152
Year four	72,335	65,378
Prior	147,992	119,926
Revolving Loans	524,250	420,453
Total loans	1,653,135	1,504,880
Current period gross charge-offs, current year	0	0
Current period gross charge-offs, year one	0	9
Current period gross charge-offs, year two	1,482	324
Current period gross charge-offs, year three	470	0
Current period gross charge-offs, year four	0	0
Current period gross charge-offs, prior	1,479	116
Current period gross charge-offs, revolving loans	50	0
Current period gross charge-offs, total	3,481	449
Commercial Business | Commercial Business | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	302,334	247,081
Year one	142,011	344,034
Year two	291,167	202,020
Year three	161,300	92,198
Year four	71,650	62,413
Prior	139,311	118,061
Revolving Loans	509,158	410,856
Total loans	1,616,931	1,476,663
Commercial Business | Commercial Business | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	143	532
Year one	605	45
Year two	5,689	180
Year three	1,588	1,037
Year four	48	1,040
Prior	3,913	294
Revolving Loans	10,468	3,635
Total loans	22,454	6,763
Commercial Business | Commercial Business | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	165	6,725
Year one	858	2,073
Year two	1,082	2,281
Year three	1,616	917
Year four	637	1,925
Prior	4,768	1,571
Revolving Loans	4,624	5,962
Total loans	13,750	21,454
Commercial Business | Commercial Business | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	0	0
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Prior	0	0
Revolving Loans	0	0
Total loans	0	0
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	17,190	13,069
Year one	10,447	5,741
Year two	5,269	2,279
Year three	1,991	1,041
Year four	942	2,659
Prior	31,171	34,168
Revolving Loans	375,547	358,585
Total loans	442,557	417,542
Current period gross charge-offs, current year	0	0
Current period gross charge-offs, year one	6	20
Current period gross charge-offs, year two	0	28
Current period gross charge-offs, year three	25	0
Current period gross charge-offs, year four	0	15
Current period gross charge-offs, prior	17	1,735
Current period gross charge-offs, revolving loans	493	207
Current period gross charge-offs, total	541	2,005
Consumer | 660-850
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	14,476	11,452
Year one	6,973	4,960
Year two	3,273	1,823
Year three	1,218	519
Year four	637	1,662
Prior	22,453	24,543
Revolving Loans	329,297	333,382
Total loans	378,327	378,341
Consumer | 600-659
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	825	1,209
Year one	1,730	192
Year two	282	237
Year three	40	425
Year four	78	209
Prior	3,166	3,954
Revolving Loans	13,113	12,668
Total loans	19,234	18,894
Consumer | 540-599
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	155	24
Year one	166	374
Year two	430	87
Year three	91	47
Year four	30	500
Prior	2,021	2,868
Revolving Loans	4,571	5,920
Total loans	7,464	9,820
Consumer | less than 540
Financing Receivable, Credit Quality Indicator [Line Items]
Current year	1,734	384
Year one	1,578	215
Year two	1,284	132
Year three	642	50
Year four	197	288
Prior	3,531	2,803
Revolving Loans	28,566	6,615
Total loans	$ 37,532	$ 10,487