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LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES - Performance Status (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	$ 12,496,815	$ 11,889,120
Loans still accruing interest because collection is considered probable	400	500
Purchased-credit-impaired loans	127,000	157,200
Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	30,500	74,700
Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	61,827	93,956
30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	10,042	55,532
30-59 Days past due | Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	500	700
60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	15,193	14,600
90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	36,592	23,824
Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	12,434,988	11,795,164
60 Days or More Past Due | Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	17,100	48,500
Commercial and industrial, including specialized lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	6,642,465	6,211,105
Commercial and industrial, including specialized lending | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	4,719	5,991
Commercial and industrial, including specialized lending | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	540	1,516
Commercial and industrial, including specialized lending | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	660	322
Commercial and industrial, including specialized lending | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	3,519	4,153
Commercial and industrial, including specialized lending | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	6,637,746	6,205,114
Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	2,115,978	2,138,622
Multifamily | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	11,834	16,003
Multifamily | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	16,003
Multifamily | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	0
Multifamily | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	11,834	0
Multifamily | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	2,104,144	2,122,619
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	981,904	797,319
Commercial real estate owner occupied | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	8,982	10,090
Commercial real estate owner occupied | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	449
Commercial real estate owner occupied | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	391	3,814
Commercial real estate owner occupied | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	8,591	5,827
Commercial real estate owner occupied | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	972,922	787,229
Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	1,326,591	1,177,650
Commercial real estate non-owner occupied | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	1,056	16,653
Commercial real estate non-owner occupied | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	293	16,653
Commercial real estate non-owner occupied | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	701	0
Commercial real estate non-owner occupied | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	62	0
Commercial real estate non-owner occupied | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	1,325,535	1,160,997
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	174,509	166,393
Construction | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	0
Construction | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	0
Construction | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	0
Construction | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	0	0
Construction | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	174,509	166,393
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	500,786	484,435
Residential real estate | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	13,259	16,523
Residential real estate | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	3,320	10,504
Residential real estate | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	5,944	2,255
Residential real estate | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	3,995	3,764
Residential real estate | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	487,527	467,912
Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	34,481	38,670
Manufactured housing | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	3,086	4,364
Manufactured housing | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	623	1,152
Manufactured housing | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	200	343
Manufactured housing | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	2,263	2,869
Manufactured housing | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	31,395	34,306
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	720,101	874,926
Installment | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	18,891	24,332
Installment | 30-59 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	5,266	9,255
Installment | 60-89 Days past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	7,297	7,866
Installment | 90 Days or more past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	6,328	7,211
Installment | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans receivable	$ 701,210	$ 850,594

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Amortized cost excluding accrued interest, of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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Amount at purchase price of financing receivable purchased with credit deterioration.

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