First Financial Bancorp. (FFBC) 10-K 24 Feb 23 2022 FY Annual report Financial data

Cover

Cover - USD ($)	12 Months Ended
	Dec. 31, 2022	Feb. 23, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	001-34762
Entity Registrant Name	FIRST FINANCIAL BANCORP.
Entity Incorporation, State or Country Code	OH
Entity Tax Identification Number	31-1042001
Entity Address, Address Line One	255 East Fifth Street, Suite 800
Entity Address, City or Town	Cincinnati
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	45202
City Area Code	877
Local Phone Number	322-9530
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 1,793,610,000
Entity Common Stock, Shares Outstanding		94,873,629
Entity Central Index Key	0000708955
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Document Information [Line Items]
Title of 12(g) Security	None
NASDAQ/NMS (GLOBAL MARKET) [Member]
Document Information [Line Items]
Title of 12(b) Security	Common stock, No par value
Trading Symbol	FFBC
Security Exchange Name	NASDAQ

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2022
Auditor Information [Abstract]
Auditor Firm ID	173
Auditor Name	Crowe LLP
Auditor Location	Louisville, Kentucky

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Cash and due from banks	$ 207,501	$ 220,031
Interest-bearing deposits with other banks	388,182	214,811
Investment Securities, Available-for-sale	3,409,648	4,207,846
Investment securities held-to-maturity (fair value $76,485 at December 31, 2022 and $99,898 at December 31, 2021)	84,021	98,420
Other investments	143,160	102,971
Loans held for sale, at fair value	7,918	29,482
Loans and leases
Total loans and leases	10,298,971	9,288,299
Loans and Leases Receivable, Allowance	(132,977)	(131,992)
Net loans and leases	10,165,994	9,156,307
Property, Plant, and Equipment, Excluding Lessor Asset under Operating Lease, after Accumulated Depreciation	189,080	193,040
Operating Lease	91,738	60,811
Goodwill	1,001,507	1,000,749
Other intangibles	93,919	104,367
Accrued interest and other assets	1,220,648	940,306
Deposits
Interest-bearing demand	3,037,153	3,198,745
Savings	3,828,139	4,157,374
Time	1,700,705	1,330,263
Total interest-bearing deposits	8,565,997	8,686,382
Total assets	17,003,316	16,329,141
Noninterest-bearing	4,135,180	4,185,572
Total deposits	12,701,177	12,871,954
Federal funds purchased and securities sold under agreements to repurchase	0	51,203
FHLB short-term borrowings	1,130,000	225,000
Other Short-term Borrowings	157,156	20,000
Total short-term borrowings	1,287,156	296,203
Long-term debt	346,672	409,832
Total borrowed funds	1,633,828	706,035
Accrued interest and other liabilities	626,938	492,210
Total liabilities	14,961,943	14,070,199
Shareholders' equity
Common stock - no par value	1,634,605	1,640,358
Retained earnings	968,237	837,473
Accumulated other comprehensive income (loss)	(358,663)	(433)
Treasury stock, at cost, 9,390,695 shares in 2022 and 10,132,554 shares in 2021	(202,806)	(218,456)
Total shareholders' equity	2,041,373	2,258,942
Total liabilities and shareholders’ equity	$ 17,003,316	$ 16,329,141
Common Stock, Shares Authorized	160,000,000	160,000,000
Common Stock, Shares, Issued	104,281,794	104,281,794
Commercial
Loans and leases
Total loans and leases	$ 3,410,272	$ 2,720,028
Lease financing
Loans and leases
Total loans and leases	236,124	109,624
Construction real estate
Loans and leases
Total loans and leases	512,050	455,894
Commercial real estate
Loans and leases
Total loans and leases	4,052,759	4,226,614
Residential real estate
Loans and leases
Total loans and leases	1,092,265	896,069
Home equity
Loans and leases
Total loans and leases	733,791	708,399
Installment
Loans and leases
Total loans and leases	209,895	119,454
Credit card
Loans and leases
Total loans and leases	$ 51,815	$ 52,217

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Investment Securities, Available-for-sale, Amortized Cost	$ 3,827,418	$ 4,180,589
Investment securities held-to-maturity, market value	$ 76,485	$ 99,898
Common Stock, No Par Value	$ 0	$ 0
Common Stock, Shares Authorized	160,000,000	160,000,000
Common Stock, Shares, Issued	104,281,794	104,281,794
Treasury Stock, Shares	9,390,695	10,132,554

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Intangible assets amortization	$ 11,185	$ 9,839	$ 11,126
Interest income
Loans and leases, including fees	458,742	385,535	431,657
Investment securities
Taxable	102,314	79,212	73,789
Tax-exempt	18,466	18,323	19,242
Total interest on investment securities	120,780	97,535	93,031
Other earning assets	5,484	147	275
Total interest income	585,006	483,217	524,963
Interest expense
Deposits	28,140	14,435	41,922
Short-term borrowings	19,132	198	6,442
Long-term borrowings	18,591	16,466	20,088
Total interest expense	65,863	31,099	68,452
Net interest income	519,143	452,118	456,511
Provision for loan and lease losses	6,731	(19,024)	70,796
Provision for Other Credit Losses	4,982	903	(237)
Net interest income after provision for credit losses	507,430	470,239	385,952
Noninterest income
Service charges on deposit accounts	28,062	31,876	29,446
Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions	23,506	23,780	21,286
Bankcard income	14,380	14,300	11,726
Client derivative fees	5,441	7,927	10,313
Foreign exchange income	54,965	44,793	39,377
Net gain from sales of loans	15,048	33,021	51,176
Net gain (loss) on sales/transfers of investment securities	(569)	(759)	4,563
Equity Securities, FV-NI, Unrealized Gain (Loss)	(639)	702	9,045
Other	17,873	15,866	12,191
Total noninterest income	189,641	171,506	189,123
Noninterest expenses
Salaries and employee benefits	269,368	245,924	236,779
Net occupancy	22,208	22,142	23,266
Furniture and equipment	13,224	13,819	14,968
Data processing	33,662	31,363	27,514
Marketing	8,744	7,983	6,414
Communication	2,683	2,930	3,492
Professional services	9,734	11,676	9,961
Gain (Loss) on Extinguishment of Debt	0	0	7,257
State intangible tax	4,285	4,256	6,058
FDIC assessments	7,194	5,630	5,110
Other	52,699	45,250	38,719
Total noninterest expenses	455,349	400,812	390,664
Income before income taxes	241,722	240,933	184,411
Income tax expense	24,110	35,773	28,601
Net income	$ 217,612	$ 205,160	$ 155,810
Earnings per common share
Basic	$ 2.33	$ 2.16	$ 1.60
Diluted	$ 2.30	$ 2.14	$ 1.59
Average common shares outstanding - basic	93,528,712	95,034,690	97,363,952
Average common shares outstanding - diluted	94,586,851	95,897,385	98,093,098
Operating Lease, Lease Income	$ 31,574	$ 0	$ 0
Operating Lease, Expense	$ 20,363	$ 0	$ 0

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 217,612	$ 205,160	$ 155,810
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on debt securities arising during the period	(346,963)	(52,538)	32,312
Change in retirement obligation	(11,177)	4,066	3,029
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(90)	(625)	0
Other comprehensive income (loss)	(358,230)	(49,097)	35,341
Comprehensive income (loss)	$ (140,618)	$ 156,063	$ 191,151

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive income (loss)	Treasury stock
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ (56,882)			$ (56,882)
Balances at January 1, 2018 at Dec. 31, 2019	$ 2,247,705		$ 1,640,771	$ 711,249		$ 13,323	$ (117,638)
Balances at January 1, 2018 at Dec. 31, 2019			104,281,794				(5,790,796)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	155,810			155,810
Other comprehensive loss	35,341					35,341
Cash dividends declared:
Common Stock at $0.78 per share in 2018, $0.90 per share in 2019, and $0.92 per share in 2020	(89,748)			(89,748)
Common stock issued in connection with business combinations	$ 0
Treasury Stock, Shares, Acquired	(880,000)						(880,000)
Treasury Stock, Value, Acquired, Cost Method	$ (16,686)						$ (16,686)
Exercise of stock options, net of shares purchased (in shares)							10,405
Exercise of stock options, net of shares purchased	(72)		$ (140)				$ (212)
Restricted stock awards, net of forfeitures (in shares)							400,526
Restricted stock awards, net of forfeitures	(1,220)		(9,362)				$ 8,142
Share-based compensation expense	7,678		$ 7,678
Ending Balances (in shares) at Dec. 31, 2020			104,281,794				(6,259,865)
Ending Balances at Dec. 31, 2020	2,282,070		$ 1,638,947	720,429		48,664	$ (125,970)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	205,160			205,160
Other comprehensive loss	(49,097)					(49,097)
Cash dividends declared:
Common Stock at $0.78 per share in 2018, $0.90 per share in 2019, and $0.92 per share in 2020	(88,116)			(88,116)
Stock Issued During Period, Shares, Acquisitions							405,805
Common stock issued in connection with business combinations	$ 10,000						$ 8,749
Treasury Stock, Shares, Acquired	(4,633,355)						(4,633,355)
Treasury Stock, Value, Acquired, Cost Method	$ (108,077)						$ (108,077)
Exercise of stock options, net of shares purchased (in shares)							6,936
Exercise of stock options, net of shares purchased	(64)		(81)				$ (145)
Restricted stock awards, net of forfeitures (in shares)							347,925
Restricted stock awards, net of forfeitures	(2,697)		(9,394)				$ 6,697
Share-based compensation expense	9,635		$ 9,635
Ending Balances (in shares) at Dec. 31, 2021			104,281,794				(10,132,554)
Ending Balances at Dec. 31, 2021	2,258,942		$ 1,640,358	837,473		(433)	$ (218,456)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	217,612			217,612
Other comprehensive loss	(358,230)					(358,230)
Cash dividends declared:
Common Stock at $0.78 per share in 2018, $0.90 per share in 2019, and $0.92 per share in 2020	(86,848)			(86,848)
Common stock issued in connection with business combinations	$ 0
Exercise of stock options, net of shares purchased (in shares)	15,660						15,660
Exercise of stock options, net of shares purchased	$ (177)		(160)				$ (337)
Restricted stock awards, net of forfeitures (in shares)							726,199
Restricted stock awards, net of forfeitures	(3,659)		(18,972)				$ 15,313
Share-based compensation expense	13,379		$ 13,379
Ending Balances (in shares) at Dec. 31, 2022			104,281,794				(9,390,695)
Ending Balances at Dec. 31, 2022	$ 2,041,373		$ 1,634,605	$ 968,237		$ (358,663)	$ (202,806)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Common Stock, Dividends, Per Share, Declared	$ 0.92	$ 0.92	$ 0.92

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating activities
Net income	$ 217,612	$ 205,160	$ 155,810
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	11,713	(18,121)	70,559
Depreciation and amortization	31,181	32,136	33,337
Stock-based compensation expense	13,379	9,635	7,678
Pension expense (income)	2,002	3,365	2,484
Net amortization (accretion) on investment securities	12,819	28,987	21,053
Net (gain) loss on sales/transfers of investments securities	569	759	(4,563)
Equity Securities, FV-NI, Unrealized Gain (Loss)	639	(702)	(9,045)
Originations of loans held for sale	(368,574)	(794,524)	(942,207)
Net (gains) losses on sales of loans held for sale	(15,048)	(33,021)	(51,176)
Proceeds from sales of loans held for sale	375,122	825,102	965,960
Deferred income taxes	(3,505)	12,087	(8,380)
Operating Lease, Expense	7,626	7,425	7,897
Operating Lease, Payments	(7,824)	(6,860)	(8,196)
Life Insurance, Corporate or Bank Owned, Change in Value	2,287	1,833	3,031
Decrease (increase) in interest receivable	(19,134)	6,463	(9,697)
(Decrease) increase in interest payable	6,652	(1,889)	(7,431)
Decrease (increase) in other assets	(226,398)	138,225	(288,857)
(Decrease) increase in other liabilities	164,302	(24,237)	176,168
Net cash provided by (used in) operating activities	200,846	388,157	108,363
Investing activities
Proceeds from Sale of Debt Securities, Available-for-sale	277,082	375,276	122,248
Proceeds from calls, paydowns and maturities of securities available-for-sale	704,304	1,139,498	904,821
Payments to Acquire Debt Securities, Available-for-sale	(641,643)	(2,418,290)	(1,551,952)
Proceeds from calls, paydowns and maturities of securities held-to-maturity	14,640	34,563	41,736
Purchases of securities held-to-maturity	0	(1,000)	(30,250)
Proceeds from Maturities, Prepayments and Calls of Other Investments	8	42,403	29,526
Purchases of other investment securities	(40,836)	(11,474)	(28,659)
Net decrease (increase) in interest-bearing deposits with other banks	(173,371)	(194,506)	36,643
Proceeds from Sale of Loans Held-for-investment	0	141,072	0
Payments for (Proceeds from) Other Loans and Leases	987,088	(503,203)	714,594
Proceeds from Sale of Other Real Estate	192	1,278	2,076
Purchases of premises and equipment	(13,778)	(15,333)	(16,466)
Net change in operating leases	(29,475)	0	0
Proceeds from Life Insurance Policy	6,860	2,305	1,525
Net cash acquired (paid) in business combinations	0	(109,024)	0
Net cash provided by (used in) investing activities	(883,105)	(510,029)	(1,203,346)
Financing activities
Net (decrease) increase in total deposits	(170,777)	639,951	2,021,774
Net (decrease) increase in short-term borrowings	990,953	129,609	(1,149,587)
Payments on long-term borrowings	(64,018)	(463,382)	(681,511)
Proceeds from FHLBank Borrowings, Financing Activities	0	0	1,040,975
Cash dividends paid on common stock	(86,606)	(87,316)	(89,691)
Treasury stock purchase	0	(108,077)	(16,686)
Proceeds from exercise of stock options	177	64	72
Net cash provided by (used in) financing activities	669,729	110,849	1,125,346
Cash and due from banks
Net (decrease) increase in Cash and due from banks	(12,530)	(11,023)	30,363
Cash and due from banks at beginning of year	220,031	231,054	200,691
Cash and due from banks at end of year	207,501	220,031	231,054
Supplemental disclosures
Interest paid	59,512	32,841	75,884
Income taxes paid	5,696	17,689	32,579
Acquisition of other real estate owned through foreclosure	327	98	1,017
Issuance of restricted stock awards	22,280	12,231	9,370
Investment securities purchased not settled	0	0	23,208
Common stock issued in bank acquisitions	0	10,000	0
Supplemental schedule for investing activities
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets, Net Of Purchase Consideration	64	62,916	0
Total liabilities assumed	822	125,894	0
Goodwill	$ 758	$ 62,978	$ 0

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Notes)	12 Months Ended
	Dec. 31, 2022
Summary of Significant Accounting Policies [Abstract]
BASIS OF PRESENTATION	Summary of Significant Accounting Policies Basis of presentation. The Consolidated Financial Statements of First Financial Bancorp., a financial holding company, principally serving Ohio, Indiana, Kentucky and Illinois, include the accounts and operations of First Financial and its wholly owned subsidiary, First Financial Bank. All significant intercompany transactions and accounts have been eliminated in consolidation. Certain reclassifications of prior years' amounts have been made to conform to current year presentation. Such reclassifications had no effect on net earnings. Use of estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates, assumptions and judgments that affect the amounts reported in the Consolidated Financial Statements and accompanying Notes. Actual realized amounts could differ materially from those estimates. COVID-19. First Financial's operations and financial results were significantly impacted by the COVID-19 pandemic. The spread of COVID-19 caused significant economic disruption throughout the United States as state and local governments issued stay at home orders and temporarily closed non-essential businesses. The full financial impact from the pandemic is unknown at this time, however prolonged disruption may adversely impact several industries within the Company's geographic footprint and impair the ability of First Financial's customers to fulfill their contractual obligations to the Company. This could cause First Financial to experience a material adverse effect on business operations, asset valuations, financial condition and results of operations. Material adverse impacts may include all or a combination of valuation impairments on First Financial's intangible assets, investments, loans, mortgage servicing rights or counter-party risk derivatives. Cash and due from banks. Cash and due from banks consist of currency, coin and cash items due from banks. Cash items due from banks include noninterest-bearing balances that are on deposit at other depository institutions. Investment securities. First Financial classifies debt securities into three categories: HTM, trading and AFS. Management classifies investment securities into the appropriate category at the time of purchase and re-evaluates that classification as deemed appropriate. Investment securities are classified as HTM when First Financial has the positive intent and ability to hold the securities to maturity. HTM securities are recorded at amortized cost. Investment securities classified as trading are held principally for resale in the near-term and are recorded at fair value. Fair value is determined using quoted market prices. Gains or losses on trading securities, both realized and unrealized, are reported in noninterest income. Investment securities not classified as either HTM or trading are classified as AFS. AFS securities are recorded at fair value, with the unrealized gains and losses, net of tax, reported as a separate component of accumulated other comprehensive income (loss) in shareholders' equity. The amortized cost of investment securities classified as either HTM or AFS on purchased callable debt securities is adjusted for amortization of premiums to the earliest call date if the call feature meets certain criteria. Otherwise, premiums are amortized to maturity similar to discounts on callable debt securities, or in the case of mortgage-backed securities, over the estimated life of the security. Such amortization and accretion are considered an adjustment to the yield on the security and included in interest income from investments. Interest and dividends are also included in interest income from investment securities in the Consolidated Statements of Income. Realized gains and losses are based on the amortized cost of the security sold using the specific identification method. Other investments. Other investments include holdings in FRB and FHLB stock, which are both carried at cost as well as equity securities, including class B Visa shares which are carried at fair value. Changes in the fair value of equity securities are recorded in Net gain (loss) on equity securities in the Consolidated Statements of Income. Loans held for sale. Loans held for sale consist of residential real estate loans newly originated for the purpose of sale to third parties, and in certain circumstances, loans previously originated that have been specifically identified by management for sale based on predetermined criteria. Loans held for sale are carried at fair value. Any subsequent change in the carrying value of transferred loans, not to exceed original cost, is recorded in the Consolidated Statements of Income. First Financial sells loans with servicing retained or released depending on pricing and market conditions. Loans and leases. Loans and leases for which First Financial has the intent and ability to hold for the foreseeable future, or until maturity or payoff, are classified in the Consolidated Balance Sheets as loans and leases. Loans and leases are carried at the principal amount outstanding, net of unamortized deferred loan origination fees and costs, and net of unearned income. Loan origination and commitment fees received, as well as certain direct loan origination costs paid, are deferred, and the net amount is amortized as an adjustment to the related loan's yield. Interest income on loans and leases is recorded on an accrual basis. When a loan is classified as nonaccrual, the accrual of interest income is discontinued and previously accrued, but unpaid interest is reversed. Any payments received while a loan is classified as nonaccrual are applied as a reduction to the carrying value of the loan. A loan may return to accrual status if collection of future principal and interest payments is no longer doubtful. Allowance for credit losses - held-to-maturity securities . Management measures expected credit losses on held-to-maturity debt securities on a collective basis by security type. The estimate of expected credit losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. Management classifies the held-to-maturity portfolio into the following major security types: Mortgage-backed, CMOs, Obligations of state and other political subdivisions and Other. Nearly all of the HTM securities held by the Company are issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses. The remainder of the Company's HTM securities are non-agency collateralized mortgage obligations and obligations of state and other political subdivisions which currently carry ratings no lower than A+. Accrued interest receivable on held-to maturity debt securities, which totaled $0.4 million and $0.2 million as of December 31, 2022 and 2021, respectively, is excluded by policy election from the estimate of credit losses. Allowance for credit losses - available-for-sale securities. For AFS debt securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For debt securities available-for-sale that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit loss is recognized in other comprehensive income (loss). Changes in the allowance for credit losses are recorded as provision for credit loss expense. Losses are charged against the allowance when management believes the uncollectibility of an AFS security is confirmed or when either of the criteria regarding intent or requirement to sell is met. Accrued interest receivable on AFS debt securities, which totaled $15.9 million and $14.9 million as of December 31, 2022 and 2020, respectively, is excluded from the estimate of credit losses. Allowance for credit losses - loans and leases. T he allowance for credit losses is a valuation account that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. Management's determination of the adequacy of the ACL is based on an assessment of the expected credit losses on loan and leases over their expected life. The ACL is increased by provision expense and decreased by charge-offs, net of recoveries of amounts previously charged-off. Loans are charged off when management believes that the collection of the princ ipal amount owed in full, either through payments from the borrower or a guarantor or from the liquidation of collateral is unlikely. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Any interest that is accrued bu t not collected is reversed against interest income when a loan is placed on nonaccrual status, which typically occurs prior to charging off all, or a portion, of a loan. The Company made the policy election to exclude accrued interest receivable on loans and leases from the estimate of credit losses. Management estimates the allowance using relevant available information from both internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience paired with economic forecasts provide the basis for the quantitatively modeled estimation of expected credit losses. First Financial adjusts its quantitative model, as necessary, to reflect conditions not already considered therein. These adjustments are commonly known as the Qualitative Framework. First Financial quantitatively models expected credit loss using PD, LGD and EAD over the R&S forecast period, reversion and post-reversion periods. Utilizing third-party software, First Financial forecasts PD by using a parameterized transition matrix approach. Average transition matrices are calculated over the TTC period, which was defined as the period from December 2007 to December 2016. TTC transition matrices are adjusted under forward-looking macroeconomic expectations to obtain R&S forecasts. First Financial is not required to develop forecasts over the full contractual term of the financial asset or group of financial assets. Rather, for periods beyond which the entity is able to make or obtain R&S forecasts of expected credit losses, the Company reverts in a straight line manner over a one year period to an average TTC loss level that is reflective of the prepayment adjusted contractual term of the financial asset or group of financial assets. First Financial elected a two year R&S period which is forecasted using econometric data sourced from Moody's, an industry-leading independent third party. FFB utilizes a non-parametric loss curve approach embedded within a third-party software for estimating LGD. The PD multiplied by LGD produces an expected loss rate that, when calculating the ACL, is applied to contractual loan cash flows, adjusted for expected future rates of principal prepayments. The Company adjusts its quantitative model for certain qualitative factors to reflect the extent to which management expects current conditions and R&S forecasts to differ from the conditions that existed for the period over which historical information was evaluated. The Qualitative Framework reflects changes related to relevant data, such as changes in asset quality trends, portfolio growth and composition, national and local economic factors, credit policy and administration and other factors not considered in the base quantitative model. Loans that do not share risk characteristics are evaluated on an individual basis. First Financial will typically evaluate on an individual basis any loans that are on nonaccrual, designated as a TDR, or reasonably expected to be designated as a TDR that are greater than $250,000. When management determines that foreclosure is probable or when repayment is expected to be provided substantially through the operation or sale of underlying collateral, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs, as applicable. For loans evaluated on an individual basis that are not determined to be collateral dependent, a discounted cash flow analysis is performed to determine expected credit losses. Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals and modifications unless either of the following applies: management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed with an individual borrower or the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company. Credit card receivables do not have stated maturities. In determining the estimated life of a credit card receivable, management first estimates the future cash flows expected to be received and then applies those expected future cash flows to the credit card balance. Significant downturns in circumstances relating to loan quality and economic conditions could result in a requirement for additional allowance. Likewise, an upturn in loan quality and improved economic conditions may allow a reduction in the required allowance. In either instance, unanticipated changes could have a significant impact on results of operations. Allowance for credit losses - unfunded commitments . First Financial estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life consistent with the Company's ACL methodology for loans and leases. A djustments to the reserve for unfunded commitments are recorded in Provision for credit losses - unfunded commitments in the Consolidated Statements of Income. The reserve for unfunded commitments is included in Accrued interest and other liabilities on the Consolidated Balance Sheets. Premises and equipment. Premises and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation and amortization are principally computed on the straight-line method over the estimated useful lives of the assets. Useful lives generally range from 10 to 40 years for building and building improvements; 3 to 10 years for furniture, fixtures and equipment; and 3 to 5 years for software, hardware and data handling equipment. Land improvements are depreciated over 20 years and leasehold improvements are depreciated over the lesser of the term of the respective lease or the useful life of the asset. Premises and equipment are evaluated for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Maintenance and repairs are expensed as incurred. Operating Leases. First Financial provides financing for various types of equipment through a variety of leasing arrangements. Operating leases are carried at the aggregate of lease payments plus estimated residual value of the leased equipment, less unearned income. The Company recognizes income over the term of the lease using the constant effective yield method. Lease residual values are reviewed for impairment at least annually. Depreciation expense related to operating lease equipment is recorded in Leasing business expense on the Consolidated Statements of Income. Bank-owned life insurance. First Financial purchases and is the owner and beneficiary of life insurance policies on the lives of certain employees . The Bank invests in these policies to provide an efficient form of funding for long-term retirement and other employee benefits costs. The policies are included within Accrued interest and other assets in the Consolidated Balance Sheets at each policy’s respective cash surrender value. Changes in the cash surrender value of these policies are recorded in Other noninterest income in the Consolidated Statements of Income. Goodwill. Under accounting for business combinations, the net assets of entities acquired by First Financial are recorded at their estimated fair value at the date of acquisition. The excess cost of the acquisition over the fair value of net assets acquired is recorded as goodwill. Goodwill and other intangible assets deemed to have indefinite lives are not amortized, but are subject to annual impairment tests. The Company is required to evaluate goodwill for impairment on an annual basis or whenever events or changes in circumstances indicate that the carrying value may not be recoverable. First Financial performs its annual impairment test effective October 1, absent events or changes in circumstances that indicate the carrying value of goodwill may not be recoverable. The Company’s goodwill is accounted for in a single reporting unit representing the consolidated entity. When required, management's quantitative impairment analysis utilizes a discounted cash flow model for the income approach and the market multiple methodology and comparable transaction methodology as the market approach. These valuation methodologies utilize key assumptions that include forecasts of revenues and expenses derived from internal management projections for a period of five years, changes in working capital estimates, company specific discount rate derived from a rate build up approach, externally sourced bank peer group market multiples and externally sourced bank peer group change in control premium, all of which are highly subjective and require significant management judgment. Changes in these key assumptions, as well as downturns in economic or business conditions, could materially affect our estimate of the reporting unit fair value and could affect our conclusion regarding the existence of potential impairment. In 2022, management evaluated goodwill for impairment using a qualitative analysis. Other intangible assets. Other intangible assets consist primarily of core deposit, customer list, MSR and other miscellaneous intangibles. CDI represent the estimated value of acquired customer deposit relationships. CDI are recorded at fair value at the date of acquisition and are based on a discounted cash flow methodology that gives appropriate consideration to expected customer attrition rates, cost of the deposit base, reserve requirements and the net maintenance cost attributable to customer deposits. Core deposit intangibles are amortized on an accelerated basis over their estimated useful lives. First Financial recorded a customer list intangible asset in conjunction with the Bannockburn and Summit mergers to account for the obligation or advantage on the part of either the Company or the customer to continue pre-existing relationships subsequent to the mergers. Customer list intangible assets are amortized on a straight-line basis over their estimated useful lives. Other intangible assets also include purchase commissions, non-compete agreements and trade name intangibles. Mortgage servicing rights are servicing fees First Financial receives from selling fixed and adjustable-rate residential mortgage loans where it obtains servicing responsibilities. In those sales, the First Financial obtained servicing responsibilities and provided certain standard representations and warranties; however, the investors have no recourse to the Company’s other assets for failure of debtors to pay when due. First Financial receives servicing fees based on a percentage of the outstanding balance. M ortgage servicing rights are measured at fair value with changes in fair value reported in Other noninterest income in the Consolidated Statements of Income. The market value of the mortgage servicing rights is estimated by calculating the present value of estimated future net servicing cash flows, taking into consideration actual and expected mortgage loan prepayment rates, discount rates, servicing costs, and other economic factors, which are determined based on current market conditions. The expected and actual rates of mortgage loan prepayments are the most significant factors driving the value of mortgage servicing rights. Increases in mortgage loan prepayments reduce estimated future net servicing cash flows because the life of the underlying loan is reduced. In determining the market value of the mortgage servicing rights, mortgage interest rates, which are used to determine prepayment rates and discount rates, are held constant over the estimated life of the portfolio. Capitalized mortgage servicing rights are reported in other assets and are amortized against noninterest income offsetting the actual servicing income of the underlying mortgage loans. Mortgage servicing rights are regularly evaluated for impairment based on the estimated fair value of those rights. The mortgage servicing rights are stratified by certain risk characteristics, primarily loan term and note rate. If impairment exists, a valuation allowance is established through a charge to income equal to the amount by which the carrying value exceeds the fair value. Other real estate owned. OREO consists of properties acquired by the Company primarily through the loan foreclosure or repossession process, or other resolution activity that results in partial or total satisfaction of problem loans. OREO properties are recorded at fair value, less estimated disposal costs (net realizable value) establishing a new cost basis. Physical possession of residential real estate property collateralizing a consumer mortgage loan occurs when legal title is obtained upon completion of foreclosure or when the borrower conveys all interest in the property to satisfy the loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Losses arising at the time of acquisition of such properties are charged against the ACL. Management performs periodic valuations to assess the adequacy of recorded OREO balances and subsequent changes in the carrying value of OREO properties are recorded in the Consolidated Statements of Income. Improvements to OREO properties may be capitalized if the improvements contribute to the overall value of the property, but may not be capitalized in excess of the net realizable value of the property. When management disposes of an OREO property, any gains or losses realized at the time of disposal are reflected in the Consolidated Statements of Income. Affordable housing projects. First Financial has investments in certain qualified affordable housing projects. These projects are indirect federal subsidies that provide tax incentives to encourage investment in the development, acquisition and rehabilitation of affordable rental housing, and allow investors to claim tax credits and other tax benefits (such as deductions from taxable income for operating losses) on their federal income tax returns. The principal risk associated with qualified affordable housing investments is the potential for noncompliance with the tax code requirements, such as failure to rent properties to qualified tenants, resulting in unavailability or recapture of the tax credits and other tax benefits. Investments in affordable housing projects are included in Accrued interest and other assets in the Consolidated Balance Sheets while any unfunded commitment is recorded with Accrued interest and other liabilities. These investments are accounted for under the proportional amortization method. Under the proportional amortization method, the initial cost of the investment is amortized in proportion to the tax credits and other benefits received and recognized as a component of Income tax expense in the Consolidated Statements of Income. Investments in historic tax credits. First Financial has noncontrolling financial investments in private investment funds and partnerships that finance the rehabilitation and re-use of historic buildings. These unconsolidated investments may generate a return through the realization of federal and state income tax credits, as well as other tax benefits, such as tax deductions from net operating losses of the investments over a period of time. Investments in historic tax credits are accounted for under the equity method of accounting and the Company’s recorded investment in these entities is carried in Accrued interest and other assets on the Consolidated Balance Sheets with any unfunded commitment recorded in Accrued interest and other liabilities. Impairment of these investments is recorded in Other noninterest expense, while the tax credits and other net tax benefits received are recognized as a component of income tax expense in the Consolidated Statements of Income. Investments in renewable energy credits . First Financial has investments in renewable energy projects where it has noncontrolling interest which is not consolidated. This investment may generate a return through the realization of federal and state income tax credits, as well as other tax benefits, such as tax deductions from net operating losses of the investments over a period of time. Investments in renewable energy tax credits are accounted for under the equity method of accounting and are included in Accrued interest and other assets on the Consolidated Balance Sheets with any unfunded commitment recorded in Accrued interest and other liabilities. Impairment of these investments is recorded in Other noninterest expense, while the tax credits and other net tax benefits received are recognized as a component of income tax expense in the Consolidated Statements of Income. Income taxes. First Financial and its subsidiaries file a consolidated federal income tax return. Each subsidiary provides for income taxes on a separate return basis, and remits to First Financial amounts determined to be currently payable. First Financial evaluates and assesses the relative risks and appropriate tax treatment of transactions after considering statutes, regulations, judicial precedent and other information, and maintains tax accruals consistent with its evaluation of these relative risks. Changes to the estimate of accrued taxes occur periodically due to changes in tax rates, interpretations of tax laws, the status of examinations being conducted by taxing authorities and changes to statutory, judicial and regulatory guidance that impact the relative risks of tax positions. These changes, when they occur, can affect deferred taxes and accrued taxes as well as the current period’s income tax expense and can be material to the Company's operating results. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Interest and penalties on income tax assessments or income tax refunds are recorded in Other noninterest expense in the Consolidated Statements of Income. In establishing a provision for income tax expense, we must make judgments and interpretations about the application of complex tax laws as well as make estimates about when in the future certain items will affect taxable income. First Financial regularly reviews its tax positions and establishes reserves for income tax-related uncertainties based on estimates of whether it is more likely than not that the tax uncertainty would be sustained upon challenge by the appropriate tax authorities which would then result in additional taxes, penalties and interest due. Reserves for uncertain tax positions, if any, are included in income tax expense in the Consolidated Financial Statements. Pension. First Financial sponsors a non-contributory defined-benefit pension plan covering substantially all employees. Accounting for the pension plan involves material estimates regarding future plan obligations and investment returns on plan assets. Significant assumptions used in the pension plan include the discount rate, expected return on plan assets and the rate of compensation increase. First Financial determines the discount rate assumption using published corporate bond indices and the projected cash flows of the pension plan. First Financial also utilizes external surveys for industry comparisons to assess the discount rate for reasonableness. The expected long-term return on plan assets is determined based on the composition of plan assets, actual returns and economic forecasts, while the rate of compensation increase is compared to historical increases for plan participants. Changes in these assumptions can have a material impact on the amount of First Financial’s future pension obligations, on the funded status of the plan and on the Company's operating results Derivative instruments. First Financial accounts for its derivative financial instruments in accordance with FASB ASC Topic 815, Derivatives and Hedging. FASB ASC Topic 815 requires all derivative instruments to be carried at fair value on the balance sheet. The accounting for changes in the fair value of derivatives is based on the intended use of the derivative and the resulting designation. Derivatives used to hedge the exposure to changes in the fair value of an asset, liability or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives used to hedge the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Client derivatives - First Financial utilizes matched interest rate swaps as a means to offer commercial borrowers fixed rate funding while providing the Company with floating rate assets. Upon entering into an interest rate swap with a borrower, the Bank simultaneously enters into an offsetting swap agreement with an institutional counterparty, with substantially matching terms. These matched interest rate swap agreements generally involve the receipt by First Financial of floating rate amounts from the counterparties in exchange for payments to these counterparties by First Financial of fixed rate amounts received from commercial borrowers over the life of the agreements. First Financial's matched interest rate swaps qualify as derivatives, but are not designated as hedging instruments. The net interest receivable or payable on matched interest rate swaps is accrued and recognized as an adjustment to interest income. The fair values of client derivatives are included within Accrued interest and other assets and Accrued interest and other liabilities in the Consolidated Balance Sheets. Foreign exchange contracts - First Financial may enter into foreign exchange derivative contracts for the benefit of commercial customers to hedge their exposure to foreign currency fluctuations. Similar to the hedging of interest rate risk from interest rate derivative contracts, First Financial also enters into foreign exchange contracts with major financial institutions to economically hedge a substantial portion of the exposure from client driven foreign exchange activity. These derivatives are classified as fre

RECENTLY ADOPTED AND ISSUED ACC

RECENTLY ADOPTED AND ISSUED ACCOUNTING STANDARDS	12 Months Ended
	Dec. 31, 2022
Accounting Standards Update and Change in Accounting Principle [Abstract]
RECENTLY ADOPTED AND ISSUED ACCOUNTING STANDARDS	Accounting Standards Recently Adopted or Issued Standards Adopted in 2022 During the first quarter of 2022, the SEC issued SAB No. 121. This bulletin adds interpretive guidance on the accounting and disclosure of obligations to safeguard crypto assets held for platform users. This guidance was applicable no later than the financial statements covering the first interim or annual period ending after June 15, 2022. Management has reviewed its business activities and determined SAB 121 is not impactful to the Company’s Consolidated Financial Statements as of September 30, 2022 as the Company does not currently safeguard crypto assets. Standards Adopted in 2021 During the first quarter of 2021, the Company adopted ASU 2019-12 - Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes . This standard simplified the accounting for income taxes by removing certain exceptions to the general principles in Topic 740 and added new requirements with the intention of simplifying and clarifying existing guidance. This update did not have a material impact on the Company’s Consolidated Financial Statements. Standards Issued But Not Yet Adopted In March, 2022, the FASB issued ASU 2022-02 - Financial Instruments - Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures . This standard eliminates the accounting guidance on TDRs for creditors in ASC 310-40 and amends the guidance on “vintage disclosures” to require disclosure of current period gross write-offs by year of origination. The ASU also updates the requirements related to accounting for credit losses under ASC 326 and adds enhanced disclosures for creditors with respect to loan refinancings and restructurings for borrowers experiencing financial difficulty. The amendments in this update are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Entities are permitted to early adopt these amendments, including adoption in any interim period, provided that the amendments are adopted as of the beginning of the annual reporting period that includes the interim period of adoption. The adoption of this standard is expected to result in amended disclosures in the Company's Consolidated Financial Statements; however, it is not expected to materially impact the Company's results of operations.

RESTRICTIONS ON CASH AND DIVIDE

RESTRICTIONS ON CASH AND DIVIDENDS	12 Months Ended
	Dec. 31, 2022
Subsidiaries [Member]
Restrictions on Subsidiary Dividends, Loans or Advances [Line Items]
Restrictions On Cash And Dividends [Text Block]	Restrictions on Cash and Dividends As of December 31, 2022 and 2021, First Financial had $25.0 million and $34.0 million, respectively, in cash restricted for withdrawal and usage due to the centrally cleared derivative initial margin requirement. Additionally, First Financial had no required reserves with the FRB as of December 31, 2022 and 2021. Dividends paid by First Financial to its shareholders are principally funded through dividends paid to the Company by its subsidiaries; however, certain restrictions exist regarding the ability of the Bank to transfer funds to First Financial in the form of cash dividends, loans or advances. The approval of the Federal Reserve Board and the ODFI is required for the Bank to pay dividends in excess of the regulatory limit, which is equal to the net income of the current year through the dividend date combined with the Bank's retained net income from the two preceding years. As of December 31, 2022, First Financial's subsidiaries had retained earnings of $801.2 million, of which $219.3 million was available for distribution to First Financial without prior regulatory approval.

INVESTMENTS

INVESTMENTS	12 Months Ended
	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
INVESTMENTS	Investment Securities During the year ended December 31, 2022, proceeds on the sale of $277.1 million of AFS securities resulted in gains of $1.0 million and losses of $1.6 million. During the year ended December 31, 2021, proceeds on the sale of $375.3 million of AFS securities resulted in gains of $6.8 million and losses of $7.6 million. During the year ended December 31, 2020, proceeds on the sale of $117.8 million of AFS securities resulted in gains of $0.9 million and losses of $0.8 million. The impact to income tax expense from these sales was insignificant in all three years. In 2022 and 2021, t here were no reclassifications of HTM securities to AFS securities. The carrying value of investment securities pledged as collateral to secure public deposits, repurchase agreements and for other purposes as required by law totaled $1.5 billion at both December 31, 2022 and December 31, 2021. The following is a summary of HTM and AFS investment securities as of December 31, 2022: Held-to-maturity Available-for-sale (Dollars in thousands) Amortized Unrecognized Unrecognized Fair Amortized Unrealized Unrealized Fair U.S. Treasuries $ 0 $ 0 $ 0 $ 0 $ 37,312 $ 0 $ (4,616) $ 32,696 Securities of U.S. government agencies and corporations 0 0 0 0 80,382 0 (13,914) 66,468 Mortgage-backed securities - residential 0 0 0 0 747,478 47 (97,462) 650,063 Mortgage-backed securities - commercial 35,363 0 (4,114) 31,249 676,934 2 (47,374) 629,562 Collateralized mortgage obligations 9,280 0 (827) 8,453 538,970 181 (61,439) 477,712 Obligations of state and other political subdivisions 8,128 105 (201) 8,032 832,066 565 (124,168) 708,463 Asset-backed securities 0 0 0 0 772,261 39 (60,975) 711,325 Other securities 31,250 0 (2,499) 28,751 142,015 0 (8,656) 133,359 Total $ 84,021 $ 105 $ (7,641) $ 76,485 $ 3,827,418 $ 834 $ (418,604) $ 3,409,648 The following is a summary of HTM and AFS investment securities as of December 31, 2021: Held-to-maturity Available-for-sale (Dollars in thousands) Amortized Unrecognized Unrecognized Fair Amortized Unrealized Unrealized Fair U.S. Treasuries $ 0 $ 0 $ 0 $ 0 $ 34,961 $ 4 $ (189) $ 34,776 Securities of U.S. government agencies and corporations 0 0 0 0 78,998 248 (129) 79,117 Mortgage-backed securities - residential 0 0 0 0 728,050 6,635 (10,548) 724,137 Mortgage-backed securities - commercial 46,362 651 0 47,013 729,948 4,294 (2,352) 731,890 Collateralized mortgage obligations 11,882 221 0 12,103 696,258 7,979 (6,497) 697,740 Obligations of state and other political subdivisions 8,926 915 0 9,841 1,058,735 35,591 (8,594) 1,085,732 Asset-backed securities 0 0 0 0 720,638 1,521 (2,578) 719,581 Other securities 31,250 176 (485) 30,941 133,001 2,114 (242) 134,873 Total $ 98,420 $ 1,963 $ (485) $ 99,898 $ 4,180,589 $ 58,386 $ (31,129) $ 4,207,846 The following table provides a summary of investment securities by contractual maturity as of December 31, 2022, except for residential and commercial mortgage-backed securities, collateralized mortgage obligations and asset-backed securities, which are shown as single totals, due to the unpredictability of the timing in principal repayments: Held-to-maturity Available-for-sale (Dollars in thousands) Amortized Fair Amortized Fair Due in one year or less $ 0 $ 0 $ 8,230 $ 8,125 Due after one year through five years 2,584 2,662 93,629 89,551 Due after five years through ten years 34,920 32,410 292,581 255,143 Due after ten years 1,874 1,711 697,335 588,167 Mortgage-backed securities - residential 0 0 747,478 650,063 Mortgage-backed securities - commercial 35,363 31,249 676,934 629,562 Collateralized mortgage obligations 9,280 8,453 538,970 477,712 Asset-backed securities 0 0 772,261 711,325 Total $ 84,021 $ 76,485 $ 3,827,418 $ 3,409,648 Unrealized gains and losses on debt securities are generally due to fluctuations in current market yields relative to the yields of the securities at their amortized cost. All AFS securities with unrealized losses are reviewed quarterly to determine if any impairment exists, requiring a write-down to fair value. For AFS securities in an unrealized loss position, the Company first assesses whether it intends to sell or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For debt securities available-for-sale in an unrealized loss position that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security . If the present value of cash flows expected to be collected is less than the amortized cost basis for the security, a credit loss exists and an allowance for credit losses is recorded, limited to the amount that the fair value of the security is less than its amortized cost basis. First Financial does not intend to sell, and it is not more likely than not that the Company will be required to sell, debt securities temporarily impaired prior to maturity or recovery of the recorded value. Additionally, based on the Company's credit assessment of AFS securities in an unrealized loss position, the Company recorded no reserves on investment securities for the twelve months ended December 31, 2022 or 2021. As of December 31, 2022, the Company's investment securities portfolio consisted of 1,251 securities, of which 891 were in an unrealized loss position. As of December 31, 2021, the Company's investment securities portfolio consisted of 1,418 securities, of which 327 were in an unrealized loss position. Certain HTM debt securities owned by First Financial are issued by U.S. government-sponsored enterprises. These securities carry the explicit and/or implicit guarantee of the U.S. government, are widely recognized as “risk free,” and have a long history of zero credit loss. The remainder of the Company's HTM securities are debt obligations of public and private corporations with no credit issues, as well as no n-agency collateralized mortgage obligations and obligations of state and other political subdivisions which currently carry ratings no lower than A+. There were no HTM securities on nonaccrual status or past due as of December 31, 2022, or 2021. The Company did not record an allowance for credit losses for these securities as of December 31, 2022 or 2021. The following tables provide the fair value and gross unrealized losses on investment securities in an unrealized loss position for which an allowance for credit losses was not recorded, aggregated by investment category and the length of time the individual securities have been in a continuous loss position: December 31, 2022 Less than 12 months 12 months or more Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasuries $ 2,383 $ (46) $ 30,313 $ (4,570) $ 32,696 $ (4,616) Securities of U.S. government agencies and corporations 0 0 66,468 (13,914) 66,468 (13,914) Mortgage-backed securities - residential 195,972 (10,413) 443,415 (87,049) 639,387 (97,462) Mortgage-backed securities - commercial 457,863 (21,020) 189,123 (30,468) 646,986 (51,488) Collateralized mortgage obligations 205,456 (13,059) 271,377 (49,207) 476,833 (62,266) Obligations of state and other political subdivisions 301,073 (31,397) 368,673 (92,972) 669,746 (124,369) Asset-backed securities 250,946 (9,410) 422,090 (51,565) 673,036 (60,975) Other securities 125,344 (7,283) 31,629 (3,872) 156,973 (11,155) Total $ 1,539,037 $ (92,628) $ 1,823,088 $ (333,617) $ 3,362,125 $ (426,245) December 31, 2021 Less than 12 months 12 months or more Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasuries $ 24,755 $ (190) $ 0 $ 0 $ 24,755 $ (190) Securities of U.S. Government agencies and corporations 17,382 (128) 0 0 17,382 (128) Mortgage-backed securities - residential 459,098 (8,375) 78,090 (2,173) 537,188 (10,548) Mortgage-backed securities - commercial 205,520 (2,149) 13,818 (203) 219,338 (2,352) Collateralized mortgage obligations 369,318 (6,110) 12,485 (387) 381,803 (6,497) Obligations of state and other political subdivisions 380,735 (7,543) 55,568 (1,051) 436,303 (8,594) Asset-backed securities 482,118 (2,578) 0 0 482,118 (2,578) Other securities 31,896 (354) 11,877 (373) 43,773 (727) Total $ 1,970,822 $ (27,427) $ 171,838 $ (4,187) $ 2,142,660 $ (31,614) For further detail on the fair value of investment securities, see Note 23 – Fair Value Disclosures.

LOANS

LOANS	12 Months Ended
	Dec. 31, 2022
Receivables [Abstract]
LOANS (excluding covered loans)	Loans and Leases First Financial offers clients a variety of commercial and consumer loan and lease products with various interest rates and payment terms. Commercial loan categories include C&I, CRE, construction real estate and lease financing. Consumer loan categories include residential real estate, home equity, installment and credit card. Lending activities are primarily concentrated in states where the Bank operates banking centers (Ohio, Indiana, Kentucky and Illinois). First Financial also offers two nationwide lending platforms, one that provides equipment and leasehold improvement financing for franchisees in the quick service and casual dining restaurant sector and another that provides loans that are secured by commissions and cash collateral accounts to insurance agents and brokers. In accordance with the CARES Act and the 2021 Consolidated Appropriations Act, First Financial participated in offering PPP loans to its customers. These loans provide a direct incentive for small businesses to keep their workers on the payroll and to maintain their operations during the COVID-19 pandemic. PPP loans are eligible to be forgiven provided certain conditions are met. As of December 31, 2022, First Financial had $3.0 million in PPP loans, net of unearned fees of $0.1 million. As of December 31, 2021, First Financial had $55.6 million in PPP loans, net of unearned income of $2.6 million. Credit quality. To facilitate the monitoring of credit quality for commercial loans, First Financial utilizes the following categories of credit grades: Pass - Higher quality loans that do not fit any of the other categories described below. Special Mention - First Financial assigns a special mention rating to loans and leases with potential weaknesses that deserve management's close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or lease or in First Financial's credit position at some future date. Substandard - First Financial assigns a substandard rating to loans or leases that are inadequately protected by the current sound financial worth and paying capacity of the borrower or the collateral pledged, if any. Substandard loans and leases have well-defined weaknesses that jeopardize repayment of the debt. Substandard loans and leases are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not addressed. Doubtful - First Financial assigns a doubtful rating to loans and leases with all of the attributes of a substandard rating with the added characteristic that the weaknesses make collection or liquidation in full highly questionable and improbable, on the basis of currently existing facts, conditions and values. The possibility of loss is extremely high, but because of certain important and reasonably specific pending factors that may work to the advantage and strengthening of the credit quality of the loan or lease, its classification as an estimated loss is deferred until its more exact status may be determined. Pending factors include proposed merger, acquisition or liquidation procedures, capital injection, perfecting liens on additional collateral and refinancing plans. The credit grades previously described are derived from standard regulatory rating definitions and are assigned upon initial approval of credit to borrowers and updated periodically thereafter. First Financial considers repayment performance to be the best indicator of credit quality for consumer loans. Consumer loans that have principal and interest payments that are past due by 90 days or more are generally classified as nonperforming. Additionally, consumer loans that have been modified in a TDR are classified as nonperforming. The following table sets forth the Company's loan portfolio at December 31, 2022 by risk attribute and origination date: (Dollars in thousands) 2022 2021 2020 2019 2018 Prior Term Total Revolving Total Commercial & industrial Pass $ 879,836 $ 561,890 $ 348,123 $ 209,758 $ 112,282 $ 206,656 $ 2,318,545 $ 971,080 $ 3,289,625 Special mention 2,740 13,821 4,125 14,047 8,523 5,544 48,800 18,055 66,855 Substandard 2,335 5,176 11,886 8,016 3,331 13,812 44,556 9,236 53,792 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 884,911 $ 580,887 $ 364,134 $ 231,821 $ 124,136 $ 226,012 $ 2,411,901 $ 998,371 $ 3,410,272 Lease financing Pass $ 167,035 $ 25,638 $ 13,705 $ 12,797 $ 9,402 $ 2,930 $ 231,507 $ 0 $ 231,507 Special mention 0 0 70 0 0 0 70 0 70 Substandard 4,363 0 0 164 11 9 4,547 0 4,547 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 171,398 $ 25,638 $ 13,775 $ 12,961 $ 9,413 $ 2,939 $ 236,124 $ 0 $ 236,124 Construction real estate Pass $ 89,116 $ 276,639 $ 96,823 $ 4,902 $ 390 $ 353 $ 468,223 $ 23,266 $ 491,489 Special mention 0 14,395 0 0 6,166 0 20,561 0 20,561 Substandard 0 0 0 0 0 0 0 0 0 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 89,116 $ 291,034 $ 96,823 $ 4,902 $ 6,556 $ 353 $ 488,784 $ 23,266 $ 512,050 Commercial real estate - investor Pass $ 643,174 $ 470,085 $ 301,510 $ 719,699 $ 300,772 $ 508,639 $ 2,943,879 $ 26,153 $ 2,970,032 Special mention 0 13,090 23,111 9,297 26,079 13,804 85,381 861 86,242 Substandard 0 6,950 6 4,025 17,178 9,631 37,790 0 37,790 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 643,174 $ 490,125 $ 324,627 $ 733,021 $ 344,029 $ 532,074 $ 3,067,050 $ 27,014 $ 3,094,064 Commercial real estate - owner Pass $ 165,411 $ 155,041 $ 170,587 $ 101,137 $ 112,063 $ 211,377 $ 915,616 $ 11,125 $ 926,741 Special mention 0 0 0 1,479 0 14,040 15,519 0 15,519 Substandard 0 525 844 5,114 3,501 6,451 16,435 0 16,435 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 165,411 $ 155,566 $ 171,431 $ 107,730 $ 115,564 $ 231,868 $ 947,570 $ 11,125 $ 958,695 Residential real estate Performing $ 320,676 $ 274,816 $ 205,948 $ 110,745 $ 51,583 $ 114,642 $ 1,078,410 $ 0 $ 1,078,410 Nonperforming 414 1,615 1,286 2,554 1,755 6,231 13,855 0 13,855 Total $ 321,090 $ 276,431 $ 207,234 $ 113,299 $ 53,338 $ 120,873 $ 1,092,265 $ 0 $ 1,092,265 Home equity Performing $ 26,411 $ 33,414 $ 38,226 $ 11,733 $ 8,051 $ 24,985 $ 142,820 $ 585,712 $ 728,532 Nonperforming 5 136 298 78 104 430 1,051 4,208 5,259 Total $ 26,416 $ 33,550 $ 38,524 $ 11,811 $ 8,155 $ 25,415 $ 143,871 $ 589,920 $ 733,791 Installment Performing $ 100,256 $ 38,694 $ 7,244 $ 3,915 $ 2,861 $ 3,242 $ 156,212 $ 51,854 $ 208,066 Nonperforming 650 794 18 6 20 42 1,530 299 1,829 Total $ 100,906 $ 39,488 $ 7,262 $ 3,921 $ 2,881 $ 3,284 $ 157,742 $ 52,153 $ 209,895 Credit cards Performing $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 51,287 $ 51,287 Nonperforming 0 0 0 0 0 0 0 528 528 Total $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 51,815 $ 51,815 Grand Total $ 2,402,422 $ 1,892,719 $ 1,223,810 $ 1,219,466 $ 664,072 $ 1,142,818 $ 8,545,307 $ 1,753,664 $ 10,298,971 The following table sets forth the Company's loan portfolio at December 31, 2021 by risk attribute and origination date: (Dollars in thousands) 2021 2020 2019 2018 2017 Prior Term Total Revolving Total Commercial & industrial Pass $ 711,198 $ 442,064 $ 339,507 $ 164,273 $ 119,580 $ 154,835 $ 1,931,457 $ 700,246 $ 2,631,703 Special mention 389 4,867 5,993 16,057 6,511 4,918 38,735 21,505 60,240 Substandard 2,220 434 2,843 1,224 12,640 1,465 20,826 7,259 28,085 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 713,807 $ 447,365 $ 348,343 $ 181,554 $ 138,731 $ 161,218 $ 1,991,018 $ 729,010 $ 2,720,028 Lease financing Pass $ 31,697 $ 21,536 $ 19,095 $ 15,494 $ 6,821 $ 4,765 $ 99,408 $ 0 $ 99,408 Special mention 0 10,216 0 0 0 0 10,216 0 10,216 Substandard 0 0 0 0 0 0 0 0 0 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 31,697 $ 31,752 $ 19,095 $ 15,494 $ 6,821 $ 4,765 $ 109,624 $ 0 $ 109,624 Construction real estate Pass $ 95,991 $ 200,421 $ 96,726 $ 15,886 $ 317 $ 12,719 $ 422,060 $ 18,299 $ 440,359 Special mention 0 6,531 0 9,004 0 0 15,535 0 15,535 Substandard 0 0 0 0 0 0 0 0 0 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 95,991 $ 206,952 $ 96,726 $ 24,890 $ 317 $ 12,719 $ 437,595 $ 18,299 $ 455,894 Commercial real estate - investor Pass $ 537,183 $ 379,217 $ 944,915 $ 367,946 $ 294,147 $ 434,641 $ 2,958,049 $ 66,579 $ 3,024,628 Special mention 0 7,479 18,136 18,006 15,566 34,153 93,340 0 93,340 Substandard 1,616 6 21,312 6,628 6,918 307 36,787 0 36,787 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 538,799 $ 386,702 $ 984,363 $ 392,580 $ 316,631 $ 469,101 $ 3,088,176 $ 66,579 $ 3,154,755 Commercial real estate - owner Pass $ 204,291 $ 184,564 $ 121,150 $ 135,463 $ 119,489 $ 259,504 $ 1,024,461 $ 7,565 $ 1,032,026 Special mention 970 2,283 2,262 3,751 1,381 5,512 16,159 0 16,159 Substandard 162 727 6,541 12,513 1,730 1,963 23,636 38 23,674 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 205,423 $ 187,574 $ 129,953 $ 151,727 $ 122,600 $ 266,979 $ 1,064,256 $ 7,603 $ 1,071,859 Residential real estate Performing $ 258,537 $ 230,699 $ 138,239 $ 64,310 $ 34,606 $ 162,924 $ 889,315 $ 0 $ 889,315 Nonperforming 236 970 1,193 598 339 3,418 6,754 0 6,754 Total $ 258,773 $ 231,669 $ 139,432 $ 64,908 $ 34,945 $ 166,342 $ 896,069 $ 0 $ 896,069 Home equity Performing $ 42,298 $ 45,638 $ 14,713 $ 11,221 $ 7,603 $ 30,588 $ 152,061 $ 553,245 $ 705,306 Nonperforming 72 161 44 67 56 234 634 2,459 3,093 Total $ 42,370 $ 45,799 $ 14,757 $ 11,288 $ 7,659 $ 30,822 $ 152,695 $ 555,704 $ 708,399 Installment Performing $ 58,209 $ 12,768 $ 8,213 $ 5,541 $ 3,925 $ 2,201 $ 90,857 $ 28,353 $ 119,210 Nonperforming 6 61 32 9 1 56 165 79 244 Total $ 58,215 $ 12,829 $ 8,245 $ 5,550 $ 3,926 $ 2,257 $ 91,022 $ 28,432 $ 119,454 Credit cards Performing $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 51,772 $ 51,772 Nonperforming 0 0 0 0 0 0 0 445 445 Total $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 52,217 $ 52,217 Grand Total $ 1,945,075 $ 1,550,642 $ 1,740,914 $ 847,991 $ 631,630 $ 1,114,203 $ 7,830,455 $ 1,457,844 $ 9,288,299 Delinquency. Loans are considered past due or delinquent when the contractual principal or interest due in accordance with the terms of the loan agreement or any portion thereof remains unpaid after the due date of the scheduled payment. Loan delinquency, including nonaccrual loans, was as follows: As of December 31, 2022 (Dollars in thousands) 30 – 59 60 – 89 > 90 days Total Current Total > 90 days Loans Commercial & industrial $ 5,375 $ 72 $ 501 $ 5,948 $ 3,404,324 $ 3,410,272 $ 0 Lease financing 5,212 1,052 843 7,107 229,017 236,124 742 Construction real estate 0 0 0 0 512,050 512,050 0 Commercial real estate-investor 0 0 0 0 3,094,064 3,094,064 0 Commercial real estate-owner 26 5,216 44 5,286 953,409 958,695 0 Residential real estate 4,254 2,074 3,260 9,588 1,082,677 1,092,265 0 Home equity 1,725 729 1,209 3,663 730,128 733,791 0 Installment 874 490 414 1,778 208,117 209,895 0 Credit card 261 150 116 527 51,288 51,815 115 Total $ 17,727 $ 9,783 $ 6,387 $ 33,897 $ 10,265,074 $ 10,298,971 $ 857 As of December 31, 2021 (Dollars in thousands) 30 - 59 60 - 89 > 90 days Total Current Total > 90 days Loans Commercial & industrial $ 303 $ 2,006 $ 2,775 $ 5,084 $ 2,714,944 $ 2,720,028 $ 0 Lease financing 93 0 0 93 109,531 109,624 0 Construction real estate 0 0 0 0 455,894 455,894 0 Commercial real estate-investor 89 42 6,409 6,540 3,148,215 3,154,755 0 Commercial real estate-owner 56 2,207 637 2,900 1,068,959 1,071,859 0 Residential real estate 4,379 262 2,114 6,755 889,314 896,069 0 Home equity 1,214 692 1,186 3,092 705,307 708,399 0 Installment 162 37 45 244 119,210 119,454 0 Credit card 223 134 137 494 51,723 52,217 137 Total $ 6,519 $ 5,380 $ 13,303 $ 25,202 $ 9,263,097 $ 9,288,299 $ 137 Nonaccrual. Loans are classified as nonaccrual when, in the opinion of management, collection of principal or interest is doubtful or when principal or interest payments are 90 days or more past due. Generally, loans are classified as nonaccrual due to the continued failure to adhere to contractual payment terms by the borrower, coupled with other pertinent factors. When a loan is classified as nonaccrual, the accrual of interest income is discontinued and previously accrued but unpaid interest is reversed. Any payments received while a loan is on nonaccrual status are applied as a reduction to the carrying value of the loan. A loan classified as nonaccrual may return to accrual status if none of the principal and interest is due and unpaid, and the Bank expects repayment of the remaining contractual principal and interest. Troubled debt restructurings. A loan modification is considered a TDR when the borrower is experiencing financial difficulty and concessions are made by the Company that would not otherwise be considered for a borrower with similar credit characteristics. The most common types of modifications include interest rate reductions, bankruptcies, maturity extensions and modifications to principal amortization, including interest-only structures. Modified terms are dependent upon the financial position and needs of the individual borrower. If the modification agreement is violated, the loan is managed by the Company’s credit administration group for resolution, which may result in foreclosure in the case of real estate. TDRs are generally classified as nonaccrual for a minimum period of six months and may qualify for return to accrual status once they have demonstrated performance with the restructured terms of the loan agreement. First Financial had 134 TDRs totaling $21.0 million at December 31, 2022, including $11.0 million of loans on accrual status and $10.0 million of loans classified as nonaccrual. First Financial had no commitments outstanding to lend additional funds to borrowers whose loan terms had been modified through TDRs, and the ACL included reserves of $5.0 million related to TDRs as of December 31, 2022. For the year ended December 31, 2022, First Financial charged off $3.2 million for the portion of TDRs determined to be uncollectible. Additionally, as of December 31, 2022, approximately $5.6 million of the accruing TDRs have been performing in accordance with the restructured terms for more than one year. First Financial had 150 TDRs totaling $27.6 million at December 31, 2021, including $11.6 million of loans on accrual status and $16.0 million of loans classified as nonaccrual. First Financial had $0.2 million of commitments outstanding to lend additional funds to borrowers whose loan terms had been modified through TDRs and the ACL included reserves of $6.3 million related to TDRs as of December 31, 2021. For the year ended December 31, 2021, First Financial charged off $1.7 million for the portion of TDRs determined to be uncollectible. Additionally, as of December 31, 2021, approximately $5.0 million of the accruing TDRs have been performing in accordance with the restructured terms for more than one year. First Financial had 155 TDRs totaling $21.8 million at December 31, 2020, including $7.1 million of loans on accrual status and $14.7 million of loans classified as nonaccrual. First Financial had $0.3 million of commitments outstanding to lend additional funds to borrowers whose loan terms had been modified through TDRs. Additionally, First Financial charged off $1.7 million for the portion of TDRs determined to be uncollectible for the year ended December 31, 2020. The following table provides information on loan modifications classified as TDRs during the years ended December 31, 2022, 2021 and 2020: Years ended December 31, 2022 2021 2020 (Dollars in thousands) Number of loans Pre-modification loan balance Period end balance Number of loans Pre-modification loan balance Period end balance Number of loans Pre-modification loan balance Period end balance Commercial & industrial 6 $ 10,049 $ 8,825 7 $ 9,311 $ 8,039 8 $ 14,984 $ 14,984 Construction 0 0 0 0 0 0 0 0 0 Commercial 2 6,337 3,115 8 16,850 9,807 0 0 0 Residential 15 1,376 1,317 17 1,585 1,553 24 1,953 1,847 Home equity 1 32 32 2 30 30 11 351 349 Installment 1 1 1 1 0 0 2 35 22 Total 25 $ 17,795 $ 13,290 35 $ 27,776 $ 19,429 45 $ 17,323 $ 17,202 The following table provides information on how TDRs were modified during the years ended December 31, 2022, 2021 and 2020: Years Ended December 31, (Dollars in thousands) 2022 2021 2020 Extended maturities $ 3,346 $ 0 $ 0 Adjusted interest rates 3,106 0 0 Combination of rate and maturity changes 0 0 0 Forbearance 4,477 7,328 4,759 Bankruptcies 90 6,723 678 Other (1) 2,271 5,378 11,765 Total $ 13,290 $ 19,429 $ 17,202 (1) Other includes covenant modifications and other concessions or combination of concessions that do not consist of interest rate adjustments, forbearance, bankruptcy and maturity extensions. First Financial considers repayment performance as an indication of the effectiveness of the Company's loan modifications. Borrowers that are 90 days or more past due on any principal or interest payments, or who prematurely terminate a restructured loan agreement without paying off the contractual principal balance, are considered to be in payment default of the terms of the TDR agreement. For the twelve months ended December 31, 2022, there were two TDRs with a balance of $0.2 million for which there was a payment default during the period that occurred within twelve months of the loan modification. For the twelve months ended December 31, 2021 and 2020, there was one TDR with an insignificant balance for which there was a payment default during the period that occurred within twelve months of the loan modification. As stated in the CARES Act and subsequently modified by the Consolidated Appropriations Act, loan modifications in response to COVID-19 executed on loans that were not more than 30 days past due as of December 31, 2019 and executed between March 1, 2020 and the January 1, 2022 are not required to be reported as a TDR. As of December 31, 2022, the Company's loan portfolio included no active loan modifications made under the guidance of the CARES Act that were not classified as TDR. As of December 31, 2021, the Company's loan portfolio included $16.5 million of active loan modifications made under the guidance of the CARES Act that were not classified as TDR. These modifications were comprised of two commercial loans making interest only payments. As of December 31, 2020, the Company's loan portfolio included $320.2 million of active loan modifications made under the guidance of the CARES Act that were not classified as TDR. These modifications included $291.5 million of borrowers making interest only payments at year end, and full principal and interest deferrals of $28.7 million. Active modifications as of December 31, 2020 were primarily hotel and franchise loans, which were $186.2 million and $44.3 million respectively as of December 31, 2020, or 58.2% and 13.8% of the total active modifications at December 31, 2020. As of December 31, 2020, the Company's loan portfolio included 90 commercial loans with balances of $312.5 million and 53 consumer loans with balances of $7.7 million that were modified in response to COVID-19 that were not considered TDRs. Nonperforming loans. Loans classified as nonaccrual and loans modified as TDRs are considered nonperforming. The following table provides information on nonperforming loans as of December 31: 2022 2021 2020 (Dollars in thousands) Nonaccrual loans with a related ACL Nonaccrual loans with no related ACL Total nonaccrual Nonaccrual loans with a related ACL Nonaccrual loans with no related ACL Total nonaccrual Nonaccrual loans with a related ACL Nonaccrual loans with no related ACL Total nonaccrual Nonaccrual loans (1) Commercial & industrial $ 6,692 $ 1,550 $ 8,242 $ 11,077 $ 6,285 $ 17,362 $ 18,711 $ 10,519 $ 29,230 Lease financing 0 178 178 0 203 203 0 0 0 Construction real estate 0 0 0 0 0 0 0 0 0 Commercial real estate 5,216 570 5,786 17,716 1,796 19,512 6,957 27,725 34,682 Residential real estate 0 10,691 10,691 0 8,305 8,305 251 11,350 11,601 Home equity 0 3,123 3,123 0 2,922 2,922 0 5,076 5,076 Installment 0 603 603 0 88 88 0 163 163 Total nonaccrual loans $ 11,908 $ 16,715 $ 28,623 $ 28,793 $ 19,599 $ 48,392 $ 25,919 $ 54,833 $ 80,752 Interest income effect 2022 2021 2020 Gross amount of interest that would have been recorded under original terms $ 3,247 $ 5,132 $ 5,892 Interest included in income Nonaccrual loans 1,134 1,618 1,636 Troubled debt restructurings 424 314 426 Total interest included in income 1,558 1,932 2,062 Net impact on interest income $ 1,689 $ 3,200 $ 3,830 Commitments outstanding to borrowers with nonaccrual loans $ 0 $ 0 $ 0 (1) Nonaccrual loans include nonaccrual TDRs of $10.0 million, $16.0 million and $14.7 million as of December 31, 2022, 2021 and 2020, respectively. First Financial individually reviews all nonperforming loan relationships greater than $250,000 to determine if an individually evaluated allowance is necessary based on the borrower’s overall financial condition, resources and payment record, support from guarantors and the realizable value of any collateral. Individually evaluated allowances are based on discounted cash flows using the loan's initial effective interest rate or the fair value of the collateral for certain collateral dependent loans. A loan is considered to be collateral dependent when the borrower is experiencing financial difficulty and the repayment is expected to be provided substantially through the operation or sale of collateral. The following table presents the amortized cost basis of collateral dependent loans by class of loan. December 31, 2022 Type of Collateral (Dollar in thousands) Business assets Commercial real estate Equipment Land Residential real estate Other Total Class of loan Commercial & industrial $ 8,205 $ 0 $ 0 $ 0 $ 0 $ 37 $ 8,242 Lease financing 0 0 178 0 0 0 178 Commercial real estate-investor 0 353 0 0 22 0 375 Commercial real estate-owner 0 3,399 1,893 119 0 0 5,411 Residential real estate 0 0 0 0 10,691 0 10,691 Home equity 0 0 0 0 3,123 0 3,123 Installment 0 0 0 0 0 603 603 Total $ 8,205 8205000 $ 3,752 $ 2,071 $ 119 $ 13,836 $ 640 $ 28,623 December 31, 2021 Type of Collateral (Dollar in thousands) Business assets Commercial real estate Equipment Land Residential real estate Other Total Class of loan Commercial & industrial $ 13,171 $ 15 $ 833 $ 0 $ 0 $ 3,343 $ 17,362 Lease financing 0 0 203 0 0 0 203 Commercial real estate-investor 0 6,362 0 0 422 0 6,784 Commercial real estate-owner 0 6,673 5,937 38 80 0 12,728 Residential real estate 0 0 0 0 8,305 0 8,305 Home equity 0 0 0 0 2,922 0 2,922 Installment 0 0 0 0 0 88 88 Total $ 13,171 $ 13,050 $ 6,973 $ 38 $ 11,729 $ 3,431 $ 48,392 Lease financing - Lessor. First Financial originates both sales-type and direct financing leases, and the Company manages and reviews lease residuals in accordance with its credit policies. Payments are generally fixed. However, in some agreements, lease payments may be indexed to a rate or index. Sales-type lease contracts contain the ability to purchase the underlying equipment at lease maturity and profit or loss is recognized at lease commencement. Direct financing leases are generally three to five years in length and may be extended at maturity, however, early cancellation may result in a fee to the borrower. For direct financing leases, the net unearned income is deferred and amortized over the life of the lease. Effective December 31, 2021, First Financial acquired Summit Funding Group, Inc., which is a full-service equipment leasing company. In conjunction with this acquisition, First Financial acquired $41.9 million of financing leases, which were included in Loans and leases on the Consolidated Balance Sheets. For further detail on the acquisition, see Note 24 - Business Combinations. The components of the Company's net investments in direct financing and sales-type leases, which are included in Lease financing on the Consolidated Balance Sheets are as follows: (Dollar in thousands) December 31, 2022 December 31, 2021 Direct financing leases Lease receivables $ 35,081 $ 49,843 Unguaranteed residual values 16,058 19,714 Sales-type leases Lease receivables 184,985 40,067 Unguaranteed residual values 0 0 Total net investment in direct financing and sales-type leases $ 236,124 $ 109,624 Interest income for direct financing and sales-type leases was $11.8 million, $2.7 million and $3.8 million for the years ended December 31, 2022, 2021 and 2020, respectively. The remaining maturities of lease receivables were as follows: (Dollars in thousands) Direct financing and Sales-type 2023 $ 56,640 2024 46,366 2025 39,495 2026 37,877 2027 31,826 Thereafter 37,512 Total lease payments 249,716 Less: unearned interest income (29,650) Net lease receivables $ 220,066 OREO. OREO is comprised of properties acquired by the Company primarily through the loan foreclosure or repossession process, that result in partial or total satisfaction of problem loans. Changes in OREO were as follows: Years ended December 31, (Dollars in thousands) 2022 2021 2020 Balance at beginning of year $ 98 $ 1,287 $ 2,033 Additions Commercial 0 98 510 Residential 327 0 507 Total additions 327 98 1,017 Disposals Commercial (98) (947) (217) Residential (94) (331) (1,859) Total disposals (192) (1,278) (2,076) Valuation adjustments Commercial 0 (9) 448 Residential (42) 0 (135) Total valuation adjustments (42) (9) 313 Balance at end of year $ 191 $ 98 $ 1,287

ALLOWANCE FOR CREDIT LOSSES

ALLOWANCE FOR CREDIT LOSSES	12 Months Ended
	Dec. 31, 2022
Receivables [Abstract]
ALLOWANCE FOR LOAN AND LEASE LOSSES	Allowance for Credit Losses Allowance for credit losses - loans and leases. The allowance for credit losses is a valuation account that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. The ACL is increased by provision expense and decreased by charge-offs, net of recoveries of amounts previously charged-off. First Financial's policy is to charge-off all or a portion of a loan when, in management's opinion, it is unlikely to collect the principal amount owed in full either through payments from the borrower or a guarantor or from the liquidation of collateral. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Accrued interest receivable on loans and leases, which totaled $47.5 million and $29.5 million as of December 31, 2022 and December 31, 2021, respectively, is excluded from the estimate of credit losses. Management estimates the allowance using relevant available information from both internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience paired with economic forecasts provide the basis for the quantitatively modeled estimation of expected credit losses. First Financial adjusts its quantitative model, as necessary, to reflect conditions not already considered by the quantitative model. These adjustments are commonly known as the Qualitative Framework. The ACL is measured on a collective (pool) basis when similar risk characteristics exist. The Company has identified the following portfolio segments and measures the ACL using the following methods: Commercial and industrial – C&I loans include revolving lines of credit and term loans to commercial customers for use in normal business operations to finance working capital needs, equipment purchases, leasehold improvements or other projects. C&I loans are generally underwritten individually and secured with the assets of the Company and/or the personal guarantee of the business owners. C&I loans also include ABL, equipment and leasehold improvement financing for franchisees in the quick service and casual dining restaurant sector and commission-based loans to insurance agents and brokers. ABL transactions typically involve larger commercial clients and are secured by specific assets, such as inventory, accounts receivable, machinery and equipment. In the franchise lending space, First Financial focuses on a limited number of restaurant concepts that have sound economics, low closure rates and strong brand awareness within specified local, regional or national markets. Within the insurance lending platform, First Financial serves insurance agents and brokers that are looking to maximize their book-of-business value and grow their agency business. Current period default rates are utilized in the modeling of the ACL for C&I loans, and are adjusted for forecasted changes in the treasury term spread and market volatility index. Changes in current period defaults or forecasted expectations for these economic variables could result in volatility in the Company's ACL in future periods. Lease financing – Lease financing consists of lease transactions for the acquisition of both new and used business equipment for commercial clients. Lease products may include tax leases, finance leases, lease lines of credit and interim funding. The credit underwriting for lease transactions includes detailed analysis of the lessee's industry and business model, nature of the equipment, equipment resale values, historical and projected cash flow analysis, secondary sources of repayment and guarantor, in addition to other considerations. The ACL model for leases sources expected default rates from the C&I portfolio model. Therefore, changes in forecasted expectations for the treasury term spread and market volatility index could result in volatility in the Company's ACL in future periods. Construction real estate – Real estate construction loans are term loans to individuals, companies or developers used for the construction or development of a commercial or residential property for which repayment will be generated by the sale or permanent financing of the property. Generally, these loans are for construction projects that have been pre-sold, pre-leased or have secured permanent financing, as well as loans to real estate companies with significant equity invested in the project. An independent credit team underwrites construction real estate loans, which are managed by experienced lending officers and monitored through the construction phase by a centralized funding desk that manages loan disbursements. The construction ACL model is adjusted for forecasted changes in rental vacancy rates in the Bank's geographic footprint and the housing price index. Changes in forecasted expectations for these economic variables could result in volatility in the Company's ACL in future periods. Commercial real estate - owner & investor – Commercial real estate loans consist of term loans secured by a mortgage lien on real estate properties such as apartment buildings, office and industrial buildings and retail shopping centers. Additionally, the Company's franchise lending activities discussed in the "Commercial and Industrial" section often include the financing of real estate in addition to equipment. The credit underwriting for both owner-occupied and investor income producing real estate loans includes detailed market analysis, historical and projected cash flow analysis, appropriate equity margins, assessment of lessees and lessors, environmental risks and the type, age, condition and location of real estate, among other factors. First Financial models owner-occupied and investor CRE separately when determining the ACL. For owner occupied CRE, current period default rates are utilized in the modeling, and are adjusted for forecasted changes in the BAA bond spread, national rental vacancy rates and the consumer confidence index. Current period default rates are also utilized in the modeling of investor CRE loans, and are adjusted for forecasted changes in the BAA bond spread, multifamily building permits within the Bank’s geographic footprint, and national rental vacancy rates. Changes in current period defaults and forecasted expectations for these economic variables could result in volatility in the Company's ACL in future periods. Residential real estate – Residential real estate loans represent loans to consumers for the financing of a residence. These loans generally have a 15 to 30 year term and a fixed interest rate, but may have a shorter term to maturity with an adjustable interest rate. In most cases, these loans are extended to borrowers to finance their primary residence. First Financial sells residential real estate loan originations into the secondary market on both servicing retained and servicing released bases. Residential real estate loans are generally underwritten to secondary market lending standards, utilizing underwriting processes that rely on empirical data to assess credit risk as well as analysis of the borrower's ability to repay their obligations, credit history, the amount of any down payment and the market value or other characteristics of the property. First Financial also offers a residential mortgage product that features similar borrower credit characteristics but a more streamlined underwriting process than typically required to sell to government-sponsored enterprises and thus is retained on the Consolidated Balance Sheets. The residential real estate ACL model is adjusted for forecasted changes in the housing price index, housing starts within the Bank’s geographic footprint and national single-family existing home sa l es. Changes in forecasted expectations for these economic variables could result in volatility in the Company's ACL in future periods. Home equity – Home equity lending includes both home equity loans and revolving lines of credit secured by a first or second lien on the borrower’s residence. Home equity lending underwriting considerations include the borrower's credit history as well as to debt-to-income and loan-to-value policy limits. The home equity ACL model is adjusted for forecasted changes in the consumer credit growth rate within the Bank’s geographic footprint and the working-age labor participation rate. Changes in forecasted expectations for these economic variables could result in volatility in the Company's ACL in future periods. Installment – Installment lending consists of consumer loans not secured by real estate, including loans secured by automobiles and unsecured personal loans. The ACL model for installment loans sources expected default rates from the residential real estate and home equity portfolio models and is paired with installment specific LGD rates. Changes in forecasted expectations for the consumer credit growth rate within the Bank’s geographic footprint, the working-age labor participation rate, the housing price index, housing starts within the Bank’s geographic footprint and national existing single-family existing home sa l es could result in volatility in the Company's ACL in future periods. Credit card – Credit card lending consists of secured and unsecured revolving lines of credit to consumer and business customers. Credit card lines are generally available for an indefinite period of time as long as the borrower's credit characteristics do not materially or adversely change, but lines are unconditionally cancellable by the Company at any time. The ACL model for credit card loans sources expected default rates from the residential real estate and home equity portfolio models and is paired with credit card specific LGD rates. Changes in forecasted expectations for the consumer credit growth rate within the Bank’s geographic footprint, the working-age labor participation rate, the housing price index, housing starts within the Bank’s geographic footprint and national existing single-family existing home sa l es could result in volatility in the Company's ACL in future periods. The Company utilized the Moody's December baseline forecast as its R&S forecast in the quantitative model. For reasonableness, the Company also considered the impact to the model from alternative, more adverse economic forecasts, slower prepayment speeds and increased default rates. These alternative analyses were utilized to inform the Company's qualitative adjustments. Additionally, First Financial considered its credit exposure to certain industries believed to be at risk for future credit stress, such as franchise, hotel and investor commercial real estate lending when making qualitative adjustments to the ACL model. First Financial's ACL is influenced by loan volumes, risk rating migration or delinquency status, and other conditions impacting loss expectations, such as reasonable and supportable forecasts of economic conditions. For the twelve months ended December 31, 2022, the ACL was relatively stable as strong loan growth and slower prepayment speeds offset the impact from stable credit quality. For the twelve months ended, December 31, 2021, the ACL declined due to improvements in economic forecasts and the Company's improved credit outlook. Changes in the allowance by loan category as of December 31 were as follows: 2022 (Dollars in thousands) Commercial & industrial Lease financing Construction real estate Commercial real estate Residential real estate Home equity Installment Credit card Total Allowance for credit losses Balance at beginning of year $ 44,052 $ 1,633 $ 11,874 $ 53,420 $ 6,225 $ 9,643 $ 1,097 $ 4,048 $ 131,992 Purchase accounting ACL for PCD 0 0 0 0 0 0 0 0 0 Provision for credit losses 3,221 2,041 1,653 (12,951) 6,509 2,066 5,232 (1,040) 6,731 Gross charge-offs (5,899) (152) 0 (3,667) (224) (160) (1,549) (907) (12,558) Recoveries 939 49 0 4,304 174 898 165 283 6,812 Total net charge-offs (4,960) (103) 0 637 (50) 738 (1,384) (624) (5,746) Ending allowance for credit losses $ 42,313 $ 3,571 $ 13,527 $ 41,106 $ 12,684 $ 12,447 $ 4,945 $ 2,384 $ 132,977 2021 (Dollars in thousands) Commercial & industrial Lease financing Construction real estate Commercial real estate Residential real estate Home equity Installment Credit card Total Allowance for credit losses Beginning balance, prior to adoption of ASC 326 $ 51,454 $ 995 $ 21,736 $ 76,795 $ 8,560 $ 11,869 $ 1,215 $ 3,055 $ 175,679 Purchase accounting ACL for PCD 0 17 0 0 0 0 0 0 17 Provision for credit losses 6,606 621 (8,367) (14,689) (2,436) (2,376) 65 1,552 (19,024) Gross charge-offs (15,620) 0 (1,498) (13,471) (127) (1,073) (334) (780) (32,903) Recoveries 1,612 0 3 4,785 228 1,223 151 221 8,223 Total net charge-offs (14,008) 0 (1,495) (8,686) 101 150 (183) (559) (24,680) Ending allowance for credit losses $ 44,052 $ 1,633 $ 11,874 $ 53,420 $ 6,225 $ 9,643 $ 1,097 $ 4,048 $ 131,992 2020 (Dollars in thousands) Commercial & industrial Lease financing Construction real estate Commercial real estate Residential real estate Home equity Installment Credit card Total Allowance for credit losses Beginning balance, prior to adoption of ASC 326 $ 18,584 $ 971 $ 2,381 $ 23,579 $ 5,299 $ 4,787 $ 392 $ 1,657 $ 57,650 Impact of adopting ASC 326 9,901 118 11,579 24,118 5,490 8,430 801 1,068 61,505 Provision for credit losses 25,407 758 7,759 38,936 (2,122) (939) 12 985 70,796 Gross charge-offs (5,345) (852) 0 (12,100) (488) (1,541) (148) (885) (21,359) Recoveries 2,907 0 17 2,262 381 1,132 158 230 7,087 Total net charge-offs (2,438) (852) 17 (9,838) (107) (409) 10 (655) (14,272) Ending allowance for credit losses $ 51,454 $ 995 $ 21,736 $ 76,795 $ 8,560 $ 11,869 $ 1,215 $ 3,055 $ 175,679 Allowance for credit losses - unfunded commitments. First Financial estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life consistent with the Company's ACL methodology for loans and leases. First Financial determined the adequacy of this reserve based upon an evaluation of the unfunded credit facilities, which included consideration of historical commitment utilization experience, credit risk ratings and historical loss rates, consistent with the Company's ACL methodology at the time.

PREMISES AND EQUIPMENT

PREMISES AND EQUIPMENT	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
PREMISES AND EQUIPMENT	Premises and Equipment Premises and equipment at December 31 were as follows: (Dollars in thousands) 2022 2021 Land and land improvements $ 49,016 $ 49,402 Buildings 157,620 155,337 Furniture and fixtures 69,855 70,847 Leasehold improvements 32,515 30,190 Construction in progress 5,644 8,145 314,650 313,921 Less: Accumulated depreciation and amortization 125,570 120,881 Total $ 189,080 $ 193,040 Depreciation expense recorded on premises and equipment in 2022, 2021 and 2020 was $12.9 million, $14.1 million and $15.4 million, respectively.

LEASES

LEASES	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Lessee, Operating Leases	Leases - Lessee A lease is defined as a contract, or part of a contract, that conveys the right to control the use of identified property, plant or equipment for a period of time in exchange for consideration. For contracts where First Financial is a lessee, substantially all of those agreements are for real estate property for branches, ATM locations and office space. Substantially all of the Company's leases are classified as operating leases, under Accounting Topic 842, operating lease agreements are required to be recognized on the Consolidated Balance Sheets as a ROU asset and a corresponding lease liability. The Company's right to use an asset over the life of a lease is recorded as a "right of use" asset in Accrued interest and other assets on the Consolidated Balance Sheet and was $ 54.3 million 57.2 million 64.5 million 67.6 million The calculated amount of the ROU assets and lease liabilities are impacted by the length of the lease term and the discount rate used to calculate the present value of minimum lease payments. Regarding the discount rate, Topic 842 requires the use of the rate implicit in the lease whenever this rate is readily determinable. As this rate is rarely determinable, the Company utilizes its incremental borrowing rate at lease inception, on a collateralized basis, over a similar term. Leases with an initial term of 12 months or less are not recorded on the balance sheet and First Financial recognizes lease expense for these leases on a straight-line basis over the term of the lease. Most leases include one or more options to renew, with renewal terms that can extend the lease term from one to 20 years or more. The exercise of renewal options on operating leases is at the Company's sole discretion, and certain leases may include options to purchase the leased property. If at lease inception, the Company considers the exercising of a renewal option to be reasonably certain, the Company will include the extended term in the calculation of the ROU asset and lease liability. First Financial does not enter into lease agreements which contain material residual value guarantees or material restrictive covenants. Certain leases provide for increases in future minimum annual rental payments as defined in the lease agreements and leases generally also include real estate taxes and common area maintenance charges in the annual rental payments. The components of lease expense for the years ended December 31, 2022, 2021 and 2020 were as follows: (Dollars in thousands) December 31, 2022 December 31, 2021 December 31, 2020 Operating lease cost $ 7,626 $ 7,425 $ 7,897 Short-term lease cost 8 108 142 Variable lease cost 2,827 2,621 2,532 Total operating lease cost $ 10,461 $ 10,154 $ 10,571 Future minimum commitments due under these lease agreements as of December 31, 2022 are as follows: (Dollars in thousands) Operating leases 2023 $ 7,681 2024 7,321 2025 7,011 2026 6,736 2027 6,164 Thereafter 46,808 Total lease payments 81,721 Less: imputed interest (17,244) Total $ 64,477 The weighted average lease term and discount rate for the Company's operating leases were as follows: December 31, 2022 December 31, 2021 December 31, 2020 Operating leases Weighted-average remaining lease term 13.1 years 13.9 years 15.1 years Weighted-average discount rate 3.29 % 3.25 % 3.07 % Supplemental cash information at year end related to leases was as follows: (Dollars in thousands) December 31, 2022 December 31, 2021 December 31, 2020 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 7,824 $ 6,860 $ 8,196 ROU assets obtained in exchange for lease obligations Operating leases 4,730 6,076 9,725

OPERATING LEASES

OPERATING LEASES	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Operating Leases - Lessor	Operating Leases - Lessor First Financial provides financing for various types of equipment through a operating leasing arrangements. Operating leases are carried at cost less accumulated depreciation in the Consolidated Balance Sheets. Operating leases were $91.7 million and $60.8 million at December 31, 2022 and December 31, 2021, respectively, net of accumulated depreciation of $35.0 million and $25.5 million at December 31, 2022 and December 31, 2021, respectively. The Company recorded lease income of $24.5 million related to lease payments for operating leases in leasing business income in the Consolidated Statement of Income for the twelve months ended December 31, 2022, respectively. Depreciation expense related to operating lease equipment was $20.4 million for the twelve months ended December 31, 2022, respectively. First Financial performs assessments of the recoverability of long-lived assets when events or changes in circumstances indicate that their carrying values may not be recoverable. First Financial recognized no impairment losses associated with operating lease assets for the twelve months ended December 31, 2022. Recognized impairment losses, if any, would be recorded in Leasing business income in the Consolidated Statements of Income. The future lease payments receivable from operating leases as of December 31, 2022 are as follows: (Dollars in thousands) Undiscounted cash flows 2023 $ 27,334 2024 21,422 2025 13,149 2026 7,122 2027 1,912 Thereafter 1,271 Total operating lease payments $ 72,210

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS	Goodwill and Other Intangible Assets Goodwill. Assets and liabilities acquired in a business combination are recorded at their estimated fair values as of the acquisition date. The excess of the purchase price of the acquisition over the fair value of net assets acquired is recorded as goodwill. Changes in the carrying amount of goodwill for the years ended December 31, 2022, 2021 and 2020 are shown below. (Dollars in thousands) 2022 2021 2020 Balance at beginning of year $ 1,000,749 $ 937,771 $ 937,771 Goodwill resulting from business combinations 758 62,978 0 Balance at end of year $ 1,001,507 $ 1,000,749 $ 937,771 In December 2021, First Financial recorded $63.0 million of goodwill resulting from the acquisition of Summit Funding Group, Inc. During 2022, First Financial recorded adjustments of $0.8 million to goodwill from the Summit merger. First Financial recorded its final adjustments to goodwill related to the Summit merger in the fourth quarter of 2022. For further detail on various mergers or acquisitions, see Note 24 - Business Combinations. Goodwill is evaluated for impairment on an annual basis as of October 1 of each year, or whenever events or changes in circumstances indicate that the fair value of a reporting unit may be below its carrying value. First Financial performed its most recent annual qualitative impairment test as of October 1, 2022 and no impairment was indicated. As of December 31, 2022, no events or changes in circumstances indicated that the fair value of the reporting unit was below its carrying value. Other intangible assets. Other intangible assets consist primarily of core deposit, customer list, mortgage servicing rights and other miscellaneous intangibles, such as purchase commissions, non-compete agreements and trade name intangibles. Core deposit intangibles represent the estimated fair value of acquired customer deposit relationships on the date of acquisition and are amortized on an accelerated basis over their estimated useful lives. First Financial's core deposit intangibles have an estimated weighted average remaining life of 5.3 years. First Financial recorded a customer list intangible asset in conjunction with the Summit acquisition to account for the obligation or advantage on the part of either the Company or the customer to continue the pre-existing relationship subsequent to the merger. The Summit customer list intangible asset is being amortized on a straight-line basis over its estimated useful life of 12 years and was $27.6 million and $30.1 million at December 31, 2022 and December 31, 2021, respectively. Additionally, First Financial recorded a customer list intangible asset in conjunction with the Bannockburn acquisition which is being amortized on a straight-line basis over its estimated useful life of 11 years and was $27.5 million and $31.1 million at December 31, 2022 and December 31, 2021, respectively. Mortgage servicing rights are servicing fees First Financial receives from selling fixed and adjustable-rate residential mortgage loans where it retains servicing responsibilities. In those sales, First Financial provided to the investors certain standard representations and warranties; however, the investors have no recourse to the Company’s other assets for failure of debtors to pay when due. First Financial receives servicing fees based on a percentage of the outstanding balance. M ortgage servicing rights are measured at fair value with changes in fair value reported in other noninterest income in the Consolidated Statements of Income. The gross carrying amount and accumulated amortization of other intangible assets were as follows: (Dollars in thousands) December 31, 2022 December 31, 2021 Gross Accumulated Gross Accumulated Amortized intangible assets Core deposit intangibles $ 41,750 $ (26,488) $ 45,256 $ (26,911) Customer list 69,563 (14,457) 69,563 (8,362) Other 14,079 (7,064) 14,589 (5,237) Unamortized intangible assets Mortgage servicing rights 16,536 0 15,469 0 Total $ 141,928 $ (48,009) $ 144,877 $ (40,510) Amortization expense recognized on intangible assets for 2022, 2021 and 2020 was $11.2 million, $9.8 million and $11.1 million, respectively. The estimated amortization expense of intangible assets for the next five years is as follows: (Dollars in thousands) Intangible amortization 2023 $ 10,538 2024 9,195 2025 9,147 2026 9,094 2027 9,053

DEPOSITS

DEPOSITS	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Deposit Liabilities Disclosures [Text Block]	Deposits Time deposits that meet or exceed the FDIC insurance limit of $250,000 at December 31, 2022 and 2021 were $165.1 million and $195.6 million, respectively. Scheduled maturities of all time deposits for the next five years were as follows: (Dollars in thousands) Time deposits 2023 $ 1,320,011 2024 293,775 2025 37,093 2026 37,881 2027 11,768 Thereafter 177 Total $ 1,700,705

BORROWINGS

BORROWINGS	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
BORROWINGS	Borrowings Short-term borrowings, or borrowings that mature in less than one year, on the Consolidated Balance Sheets include repurchase agreements utilized for corporate sweep accounts with cash management account agreements in place, federal funds purchased, overnight advances from the FHLB and a short-term line of credit. The following is a summary of short-term borrowings for the last three years: 2022 2021 2020 (Dollars in thousands) Amount Rate Amount Rate Amount Rate At December 31, Federal funds purchased and securities sold under agreements to repurchase $ 0 0.00 % $ 51,203 0.01 % $ 166,594 0.05 % FHLB borrowings 1,130,000 4.58 % 225,000 0.18 % 0 0.00 % Other short-term borrowings 157,156 4.33 % 20,000 1.90 % 0 0.00 % Total $ 1,287,156 4.55 % $ 296,203 0.27 % $ 166,594 0.05 % Average for the year Federal funds purchased and securities sold under agreements to repurchase $ 29,526 1.42 % $ 160,967 0.07 % $ 149,036 0.26 % FHLB borrowings 672,928 2.37 % 43,371 0.20 % 441,867 1.37 % Other short-term borrowings 115,041 2.38 % 165 1.92 % 0 0.00 % Total $ 817,495 2.34 % $ 204,503 0.10 % $ 590,903 1.09 % All repurchase agreements are subject to terms and conditions agreed to by the Bank and the client. To secure its liability to the client, the Bank is authorized to sell or repurchase U.S. Treasury, government agency and mortgage-backed securities. As of December 31, 2022, the Bank had no securities sold under agreements to repurchase. As of December 31, 2021 the Bank had $51.3 million of securities sold under agreements to repurchase. First Financial had outstanding FHLB advances included in short-term borrowings of $1.1 billion as of December 31, 2022 and $225.0 million outstanding short-term FHLB advances as of December 31, 2021. Additionally, at December 31, 2022, other short-term borrowings included $157.2 million of collateral owed by counterparty banks to First Financial. First Financial also has a $40.0 million short-term credit facility with an unaffiliated bank that matures in December, 2023, which is included in short-term borrowings. This facility has a variable interest rate and provides First Financial additional liquidity, if needed, for various corporate activities including the repurchase of First Financial common stock and the payment of dividends to shareholders. As of December 31, 2022, First Financial had no outstanding balance and as of December 31, 2021, First Financial had an outstanding balance of $20.0 million. The credit agreement requires First Financial to comply with certain covenants including those related to asset quality and capital levels, and First Financial was in compliance with all covenants associated with this facility as of December 31, 2022. This credit facility also required First Financial to pledge as collateral the Bank's common stock where the lender is granted a security interest in this collateral. The following is a summary of First Financial's long-term debt: 2022 2021 (Dollars in thousands) Amount Average Rate Amount Average Rate Subordinated debt $ 313,705 5.48 % $ 313,248 4.86 % Unamortized debt issuance costs (1,998) n/a (2,384) n/a Capital lease liability 1,698 3.82 % 1,781 3.81 % Capital loan with municipality 775 0.00 % 775 0.00 % Subtotal 314,180 5.50 % 313,420 4.88 % Acquired in Summit acquisition Bank lines of credit 0 0.00 % 23,030 2.77 % Notes issued in conjunction with acquisition of property and equipment 32,492 4.44 % 73,382 4.09 % Total notes payable acquired in Summit acquisition 32,492 4.44 % 96,412 3.77 % Total long-term debt $ 346,672 5.40 % $ 409,832 4.62 % As of December 31, 2022, First Financial's long-term debt matures as follows: (Dollars in thousands) Long-term debt 2023 $ 6,898 2024 12,408 2025 4,169 2026 6,201 2027 2,173 Thereafter 314,823 Total $ 346,672 In April 2020, First Financial issued $150.0 million of fixed to floating rate subordinated notes. The subordinated notes have an initial fixed interest rate of 5.25% to, but excluding, May 15, 2025, payable semi-annually in arrears. From, and including, May 15, 2025, the interest rate on the subordinated notes will reset quarterly to a floating rate per annum equal to a benchmark rate, which is expected to be the then-current three-month term SOFR, plus 509 basis points, payable quarterly in arrears. The subordinated notes mature on May 15, 2030. These notes are redeemable by the Company in whole or in part beginning with the interest payment date of May 15, 2025. In 2015, First Financial issued $120.0 million of subordinated notes, which have a fixed interest rate of 5.13% payable semiannually and mature in August 2025. These notes are not redeemable by the Company or callable by the holders of the notes prior to maturity. In addition, First Financial acquired $49.5 million of variable rate subordinated notes in the MSFG merger that were issued to previously formed trusts in exchange for the trust proceeds. Interest on the acquired subordinated notes is payable quarterly, in arrears, and the Company has the option to defer interest payments for a period not to exceed 20 consecutive quarters. These acquired subordinated notes mature 30 years after the date of original issuance and may be called at par following the 5 year anniversary of issuance. First Financial also acquired $8.4 million of 6.00% fixed rate private placement subordinated debt in conjunction with the MSFG merger that was issued in 2015 and matured in 2025. These notes were redeemable by the Company at par following the 5 year anniversary of issuance. These subordinated notes were redeemed by the Company in the first quarter of 2021. The subordinated notes are treated as Tier 2 capital for regulatory capital purposes and are included in Long-term debt on the Consolidated Balance Sheets. Additionally, in conjunction with the acquisition of Summit, First Financial assumed $96.4 million in outstanding long-term borrowings at December 31, 2021. These outstanding long-term borrowings consisted of $23.0 million of lines of credit with other banks utilized to operate the business and carried an average interest rate of 2.77%. These lines of credit were paid off in January 2022. Acquired long-term borrowings also included $32.5 million and $73.4 million of term notes, both with and without recourse, with an average interest rate of 4.44% and 4.09% at December 31, 2022 and 2021, respectively. These term notes were used to finance Summit's equity investment in the purchase of equipment to be leased to customers.

DERIVATIVES

DERIVATIVES	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES	Derivatives First Financial uses certain derivative instruments, including rate caps, floors, swaps and foreign exchange contracts, to meet the operating needs of its clients while managing the interest and currency rate risk associated with certain transactions. First Financial may also utilize interest rate swaps to manage the interest rate risk profile of the Company. Interest rate payments are exchanged with counterparties, based on the notional amount as established in the interest rate agreement. As only interest rate payments are exchanged, the cash requirements and credit risk associated with interest rate swaps are significantly less than the notional amount and the Company’s credit risk exposure is limited to the market value of the instruments. First Financial does not use derivatives for speculative purposes. First Financial manages this market value credit risk through counterparty credit policies including a review of total derivative notional position to total assets, total credit exposure to total capital and counterparty credit exposure risk. For discussion of First Financial's accounting for derivative instruments, see Note 1 – Summary of Significant Accounting Policies. Client derivatives. First Financial utilizes interest rate swaps as a means to offer commercial borrowers fixed rate funding while providing the Company with floating rate assets. At December 31, 2022, for interest rate derivatives, the Company had a total counterparty notional amount outstanding of $2.2 billion, spread among six counterparties, with an estimated fair value of $ 145.8 million 74.2 million First Financial monitors its derivative credit exposure to borrowers by monitoring the creditworthiness of the related loan customers through the Company's normal credit review processes. Additionally, the Company's ACL Committee monitors derivative credit risk exposure associated with problem loans through the Company's ACL committee. First Financial considers the market value of a derivative instrument to be part of the carrying value of the related loan for these purposes as the borrower is contractually obligated to pay First Financial this amount in the event the derivative contract is terminated. In connection with its use of derivative instruments, First Financial and its counterparties may be required to post cash collateral to offset the market position of the derivative instruments. First Financial maintains the right to offset these derivative positions with the collateral posted against them by or with the relevant counterparties. Foreign Exchange Contracts. First Financial may enter into foreign exchange derivative contracts for the benefit of commercial customers to hedge their exposure to foreign currency fluctuations. Similar to the hedging of interest rate risk from interest rate derivative contracts, First Financial also enters into foreign exchange contracts with major financial institutions to economically hedge a substantial portion of the exposure from client driven foreign exchange activity. These derivatives are classified as free-standing instruments with the revaluation gain or loss recorded in Foreign exchange income in the Consolidated Statements of Income. At December 31, 2022, the Company had total counterparty notional amount outstanding of $7.7 billion spread among five counterparties, with an estimated fair value of $ 17.3 million related to foreign exchange contracts, which is included in Accrued interest and other liabilities in the Consolidated Balance Sheets. At December 31, 2021, the Company had total counterparty notional amounts outstanding of $6.4 billion spread among four counterparties, with an estimated fair value of $ 15.2 million In connection with its use of foreign exchange contracts, First Financial and its counterparties may be required to post cash collateral to offset the market position of the derivative instruments. First Financial maintains the right to offset these derivative positions with the collateral posted against them by or with the relevant counterparties. The following table details the location and amounts of client derivatives and foreign exchange contracts recognized in the Consolidated Balance Sheets: December 31, 2022 December 31, 2021 Estimated fair value Estimated fair value (Dollars in thousands) Balance Notional Gain Loss Notional Gain Loss Client derivatives-instruments associated with loans Matched interest rate swaps with borrower Accrued interest and other assets and other liabilities $ 2,206,351 $ 5,057 $ (147,759) $ 2,430,587 $ 84,694 $ (7,508) Matched interest rate swaps with counterparty Accrued interest and other liabilities 2,206,351 147,759 (5,057) 2,430,587 7,508 (84,701) Foreign exchange contracts Matched foreign exchange contracts with customers Accrued interest and other assets 7,734,395 111,078 (93,804) 6,423,085 67,988 (52,780) Matched foreign exchange contracts with counterparty Accrued interest and other liabilities 7,681,006 93,804 (111,078) 6,399,432 52,780 (67,988) Total $ 19,828,103 $ 357,698 $ (357,698) $ 17,683,691 $ 212,970 $ (212,977) The following table discloses the gross and net amounts of client derivatives and foreign exchange contracts recognized in the Consolidated Balance Sheets: December 31, 2022 December 31, 2021 (Dollars in thousands) Gross amounts of recognized liabilities Gross amounts offset in the Consolidated Balance Sheets Net amounts of (assets)/liabilities presented in the Consolidated Balance Sheets Gross amounts of recognized liabilities Gross amounts offset in the Consolidated Balance Sheets Net amounts of (assets)/liabilities presented in the Consolidated Balance Sheets Client derivatives Matched interest rate swaps $ 152,816 $ (314,048) $ (161,232) $ 92,209 $ (149,647) $ (57,438) Foreign exchange contracts with counterparty 204,882 (101,945) 102,937 120,768 (56,443) 64,325 Total $ 357,698 $ (415,993) $ (58,295) $ 212,977 $ (206,090) $ 6,887 The following table details the derivative financial instruments, the average remaining maturities and the weighted-average interest rates being paid and received by First Financial at December 31, 2022: (Dollars in thousands) Notional Average Fair Client derivatives-interest rate contracts Receive fixed, matched interest rate swaps with borrower $ 2,206,351 5.3 $ (142,702) Pay fixed, matched interest rate swaps with counterparty 2,206,351 5.3 142,702 Client derivatives-foreign exchange contracts Foreign exchange contracts - pay USD 7,734,395 0.7 17,274 Foreign exchange contracts - receive USD 7,681,006 0.7 (17,274) Total client derivatives $ 19,828,103 1.7 $ 0 Credit derivatives. In conjunction with participating interests in commercial loans, First Financial periodically enters into risk participation agreements with counterparties whereby First Financial assumes a portion of the credit exposure associated with an interest rate swap on the participated loan in exchange for a fee. Under these agreements, First Financial will make payments to the counterparty if the loan customer defaults on its obligation to perform under the interest rate swap contract with the counterparty. The total notional value of these agreements totaled $379.3 million as of December 31, 2022 and $362.8 million as of December 31, 2021. The fair value of these agreements recorded in Accrued interest and other liabilities on the Consolidated Balance Sheets was immaterial at December 31, 2022 and $0.1 million at December 31, 2021. Mortgage Derivatives. First Financial enters into IRLCs and forward commitments for the future delivery of mortgage loans to third party investors, which are considered derivatives. When borrowers secure an IRLC with First Financial and the loans are intended to be sold, First Financial will enter into forward commitments for the future delivery of the loans to third party investors in order to hedge against the effect of changes in interest rates impacting IRLCs and and loans held for sale. At December 31, 2022, the notional amount of the IRLCs was $12.0 million and the notional amount of forward commitments was $15.3 million. As of December 31, 2021, the notional amount of IRLCs was $45.0 million and the notional amount of forward commitments was $62.5 million. The fair value of these agreements was $4.3 million at December 31, 2022 and $3.3 million at December 31, 2021 and was recorded in Accrued interest and other assets on the Consolidated Balance Sheets.

RELATED PARTIES TRANSACTIONS

RELATED PARTIES TRANSACTIONS	12 Months Ended
	Dec. 31, 2022
Related Party Transactions [Abstract]
Loans to Related Parties	Related Party Transactions Outstanding balance of loans to directors, executive officers, principal holders of First Financial’s common stock and certain related persons were as follows: (Dollars in thousands) 2022 Beginning balance $ 3,482 Additions 2,539 Deductions (403) Ending balance $ 5,618 Loans 90 days or more past due $ 0 Related parties of First Financial, as defined for inclusion in the table above, were clients of, and had transactions with, subsidiaries of First Financial during the periods noted. Similar transactions with related parties may be expected in future periods.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	Commitments and Contingencies First Financial offers a variety of financial instruments including letters of credit and outstanding commitments to extend credit to assist clients in meeting their requirement for liquidity and credit enhancement. GAAP does not require these financial instruments to be recorded in the Consolidated Financial Statements. First Financial utilizes the same credit policies in issuing commitments and conditional obligations as it does for credit instruments recorded on the Consolidated Balance Sheets. First Financial’s exposure to credit loss in the event of nonperformance by the counterparty is represented by the contractual amounts of those instruments. First Financial estimates credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company in accordance with ASC 326. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated useful life consistent with the Company's ACL methodology for loans and leases. Adjustments to the reserve for unfunded commitments are recorded in Provision for credit losses - unfunded commitments in the Consolidated Statements of Income. First Financial had $18.4 million and $13.4 million of reserves for unfunded commitments recorded in Accrued interest and other liabilities on the Consolidated Balance Sheets as of December 31, 2022 and 2021. Loan commitments. Loan commitments are agreements to extend credit to a client absent any violation of conditions established in the commitment agreement. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The amount of collateral obtained, if deemed necessary by First Financial upon extension of credit, is based on management’s credit evaluation of the client. The collateral held varies, but may include securities, real estate, inventory, plant or equipment. First Financial had commitments outstanding to extend credit, totaling $4.4 billion and $4.0 billion at December 31, 2022 and 2021, respectively. As of December 31, 2022, loan commitments with a fixed interest rate totaled $126.3 million while commitments with variable interest rates totaled $4.2 billion. At December 31, 2021, loan commitments with a fixed interest rate totaled $129.2 million while commitments with variable interest rates totaled $3.8 billion. The fixed rate loan commitments have interest rates ranging from 0.00% to 21.00% for both December 31, 2022 and 2021 and have maturities ranging from less than 1 year to 31.6 years for December 31, 2022 and less than 1 year to 30.9 years for December 31, 2021. The following table presents by type First Financial's loan balances and contractual obligations to extend credit: December 31, 2022 December 31, 2021 (dollars in thousands) Unfunded commitment Loan balance Unfunded commitment Loan balance Commercial & industrial $ 1,833,977 $ 3,410,272 $ 1,545,995 $ 2,720,028 Lease financing 6,842 236,124 18,037 109,624 Construction real estate 689,015 512,050 484,038 455,894 Commercial real estate-investor 107,205 3,094,064 65,660 3,154,755 Commercial real estate-owner 48,208 958,695 29,824 1,071,859 Residential real estate 74,089 1,092,265 50,043 896,069 Home equity 903,459 733,791 822,343 708,399 Installment 16,073 209,895 15,985 119,454 Credit card 225,864 51,815 217,006 52,217 Total $ 3,904,732 $ 10,298,971 $ 3,248,931 $ 9,288,299 Letters of credit. Letters of credit are conditional commitments issued by First Financial to guarantee the performance of a client to a third party. First Financial’s letters of credit consist of performance assurances made on behalf of clients who have a contractual commitment to produce or deliver goods or services. The risk to First Financial arises from its obligation to make payment in the event of the client's contractual default to produce the contracted good or service to a third party. First Financial has issued letters of credit aggregating $31.5 million and $41.1 million at December 31, 2022, and 2021, respectively. Management conducts regular reviews of these instruments on an individual client basis. Risk participation agreements. First Financial is a party in risk participation transactions of interest rate swaps, which had total notional amount of $379.3 million and $362.8 million at December 31, 2022 and 2021, respectively. Affordable housing projects and other tax credit investments. First Financial is a limited partner in several tax-advantaged limited partnerships whose purpose is to invest in approved qualified affordable housing, renewable energy, or other renovation or community revitalization projects. These investments are included in A ccrued interest and other assets in the Consolidated Balance Sheets , with any unfunded commitments included in A ccrued interest and other liabilities i n the Consolidated Balance Sheets . As of December 31, 2022 , First Financial expects to recover its remaining investments through the use of the tax credits that are generated by the investments. The following table summarizes First Financial's investments in affordable housing projects and other tax credit investments. (Dollars in thousands) December 31, 2022 December 31, 2021 Investment Accounting Method Investment Unfunded commitment Investment Unfunded commitment LIHTC Proportional amortization $ 126,537 $ 70,690 $ 108,974 $ 57,341 HTC Equity 17,108 11,955 2,581 56 NMTC Equity 2,944 0 3,895 0 Renewable energy Equity 11,851 1,689 18,585 15,114 Total $ 158,440 $ 84,334 $ 134,035 $ 72,511 The following tables summarize First Financial's amortization expense and tax benefit recognized in affordable housing projects and other tax credit investments. Twelve months ended December 31, 2022 December 31, 2021 December 31, 2020 (Dollars in thousands) Amortization expense (1) Tax expense (benefit) recognized (2) Amortization expense (1) Tax expense (benefit) recognized (2) Amortization expense (1) Tax expense (benefit) recognized (2) LIHTC $ 11,929 $ (11,088) $ 8,894 $ (8,581) $ 8,076 $ (7,629) HTC 0 (319) 1,116 (263) 474 (563) NMTC 415 (210) 210 (210) 175 (175) Renewable energy 23,411 (25,473) 11,467 (12,216) 4,756 (4,777) Total $ 35,755 $ (37,090) $ 21,687 $ (21,270) $ 13,481 $ (13,144) (1) The amortization expense for the LIHTC investments is included in income tax expense. The amortization expense for the HTC, NMTC, and Renewable energy tax credits is included in other noninterest expense. (2) All of the tax benefits recognized are included in Income tax expense. The tax benefit recognized for the HTC, NMTC, and Renewable energy investments primarily reflects the tax credits generated from the investments and excludes the net tax expense (benefit) and deferred tax liability of the investments’ income (loss). Contingencies/Litigation. First Financial and its subsidiaries are engaged in various matters of litigation from time to time, and have a number of unresolved claims pending. Like many banks, First Financial has been the subject of lawsuits relating to overdraft fees. This type of litigation is time consuming and expensive in large part due to the amount of data to be sorted and disclosed, in some cases going back multiple years. During the second and fourth quarters of 2021, First Financial determined that it was in its best interest to settle lawsuits in the states of Indiana and Ohio and have signed settlement agreements that were presented to the court for approval. As such, First Financial recorded legal settlement expenses of $7.1 million, which were recorded in Other noninterest expenses in the Consolidated Statements of Income during 2021. For year ended December 31, 2022, legal settlement expenses of $3.3 million were paid. Additionally, as part of the ordinary course of business, First Financial and its subsidiaries are parties to other litigation, including claims to the ownership of funds in particular accounts, the collection of delinquent accounts, challenges to security interests in collateral, foreclosure interests that are incidental to our regular business activities and other matters. While the ultimate liability with respect to these litigation matters and claims cannot be determined at this time, First Financial believes that damages, if any, and other amounts relating to pending matters are not probable or cannot be reasonably estimated as of December 31, 2022. Reserves are established for these various matters of litigation, when appropriate, under FASB ASC Topic 450, Contingencies, based in part upon the advice of legal counsel. First Financial had no reserves related to litigation matters as of December 31, 2022 or December 31, 2021.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
INCOME TAXES	Income Taxes Income tax expense consisted of the following components: (Dollars in thousands) 2022 2021 2020 Current expense Federal $ 24,307 $ 21,397 $ 34,632 State 3,308 2,289 2,349 Total current expense 27,615 23,686 36,981 Deferred expense (benefit) Federal (4,399) 10,944 (8,624) State 894 1,143 244 Total deferred expense (benefit) (3,505) 12,087 (8,380) Income tax expense $ 24,110 $ 35,773 $ 28,601 The difference between the federal income tax rates applied to income before income taxes and the effective rates were due to the following: (Dollars in thousands) 2022 2021 2020 Income taxes computed at federal statutory rate (21%) on income before income taxes $ 50,762 $ 50,596 $ 38,726 Benefit from tax-exempt income (5,743) (5,613) (5,901) Tax credits (37,331) (21,561) (13,064) Basis reduction on tax credit 2,761 1,346 657 Tax expense (benefit) of equity compensation (154) (243) 340 State income taxes, net of federal tax benefit 3,320 2,711 2,049 Affordable housing investments 9,341 7,194 6,635 Other 1,154 1,343 (841) Income tax expense $ 24,110 $ 35,773 $ 28,601 The major components of the temporary differences that gave rise to deferred tax assets and liabilities at December 31, 2022, and 2021, were as follows: (Dollars in thousands) 2022 2021 Deferred tax assets Allowance for credit losses $ 30,464 $ 29,754 Deferred compensation 346 292 Postretirement benefits other than pension liability 636 652 Accrued stock-based compensation 2,216 1,836 Interest on nonaccrual loans 406 442 Accrued expenses 7,454 7,286 Net unrealized losses on investment securities 92,072 0 State net operating loss 1,152 1,746 Leasing liability 15,308 15,794 Reserve for unfunded commitments 4,254 3,049 Other 516 565 Total deferred tax assets 154,824 61,416 Deferred tax liabilities Tax depreciation in excess of book depreciation (7,172) (9,117) FHLB and FRB stock (3,912) (3,836) Mortgage-servicing rights (3,825) (3,518) Leasing activities (12,829) (10,860) Retirement obligation (10,197) (13,754) Intangible assets (18,462) (16,081) Deferred loan fees and costs (1,638) (933) Prepaid expenses (645) (680) Limited partnership investments (312) (2,957) Fair value adjustments on business combinations (6,736) (6,900) Net unrealized gains on investment securities 0 (5,791) Foreign exchange deferred income 0 (428) ASU 2016-01 unrealized gain/loss-equity securities (2,237) (2,339) Right of use assets (12,911) (13,390) Other (3,653) (2,426) Total deferred tax liabilities (84,529) (93,010) Total net deferred tax asset (liability) $ 70,295 $ (31,594) At December 31, 2022 and 2021, the Company had a state net operating loss carryforward from MSFG of $1.5 million and $2.3 million. This carryforward begins to expire in 2026. The Company expects to fully utilize this net operating loss and, therefore, a valuation allowance was not required at December 31, 2022 and 2021. The acquired MSFG state net operating loss is subject to IRC Section 382 and is limited annually. The realization of the Company’s deferred tax assets is dependent upon the Company’s ability to generate taxable income in future periods and the reversal of deferred tax liabilities during the same period. The Company has evaluated the available evidence supporting the realization of its deferred tax assets and determined it is more likely than not that the assets will be realized and thus no valuation allowance was recorded at December 31, 2022 and 2021. The Bank’s retained earnings at December 31, 2022 and 2021 included base-year bad debt reserves of $16.1 million. Base-year reserves are subject to recapture in the event the Bank redeems its stock, makes distributions in excess of current and accumulated earnings and profits (as calculated for federal income tax purposes), loses its “bank” status or liquidates. The Bank has no intention of meeting any of the criteria for recapture. Accordingly, a deferred income tax liability of $3.4 million has not been recorded. At December 31, 2022, 2021 and 2020, First Financial had $1.9 million of unrecognized tax benefits, as determined in FASB ASC Topic 740-10, Income Taxes, that, if recognized, would favorably affect the effective income tax rate in future periods. A progression of gross unrecognized tax benefits as of December 31, 2022, 2021 and 2020 is as follows: (Dollars in thousands) 2022 2021 2020 Balance at beginning of year $ 2,386 $ 2,386 $ 3,006 Settlements 0 0 (620) Balance at end of year $ 2,386 $ 2,386 $ 2,386 The unrecognized tax benefits relate to state income tax exposures where First Financial believes it is likely that, upon examination, a state may take a position contrary to the position taken by the Company. The Company believes that resolution regarding our uncertain tax positions is reasonably possible within the next twelve months and could result in full, partial or no recognition of the benefit. First Financial recognizes interest accrued related to unrecognized tax benefits and penalties as income tax expense. At December 31, 2022, 2021 and 2020, the Company had no interest or penalties recorded. First Financial and its subsidiaries are subject to U.S. federal income tax as well as state and local income tax in several jurisdictions. Tax years prior to 2019 have been closed and are no longer subject to U.S. federal income tax examinations. Tax years 2019 through 2022 remain open to examination by the federal taxing authority. With limited exception, First Financial is no longer subject to state and local income tax examinations for years prior to 2018.

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
EMPLOYEE BENEFIT PLANS	Employee Benefit Plans Pension plan. First Financial sponsors a non-contributory defined benefit pension plan covering substantially all employees and uses a December 31 measurement date for the plan. Plan assets were primarily invested in fixed income and equity mutual funds. The pension plan does not directly own any shares of First Financial common stock or any other First Financial security or product. The investment objective of the Plan is to structure the assets to mirror the liabilities of the Plan, with the fixed income component matching the identified near and long-term plan distributions and the equity component generating growth of capital to meet other future Plan liabilities. The determination of the overall expected long-term return on plan assets was based on the composition of plan assets and long-term asset class return estimates developed by the Plan advisor, as well as a consensus of estimates from similarly managed portfolios of expected future returns. First Financial recorded expense related to its pension plan of $2.0 million for 2022, $3.4 million for 2021 and $2.5 million for 2020. The components of net periodic benefit cost other than the service cost component are included in Other noninterest expense while service costs are recorded as a component Salaries and employee benefits in the Consolidated Statements of Income. First Financial made no cash contributions to the pension plan in 2022, 2021 or 2020 and does not expect to make any contributions in 2023. The following tables set forth information concerning amounts recognized in First Financial's Consolidated Balance Sheets and Consolidated Statements of Income related to the Company's pension plan: December 31, (Dollars in thousands) 2022 2021 Change in benefit obligation Benefit obligation at beginning of year $ 93,271 $ 87,494 Service cost 9,065 9,128 Interest cost 2,585 2,157 Actuarial (gain) loss (16,655) 2,588 Benefits paid, excluding settlement (8,260) (8,096) Benefit obligation at end of year 80,006 93,271 Change in plan assets Fair value of plan assets at beginning of year 163,382 155,704 Actual return on plan assets (21,673) 15,774 Benefits paid, excluding settlement (8,260) (8,096) Fair value of plan assets at end of year 133,449 163,382 Amounts recognized in the Consolidated Balance Sheets Assets 53,443 70,111 Liabilities 0 0 Net amount recognized $ 53,443 $ 70,111 Amounts recognized in accumulated other comprehensive income (loss) Net actuarial loss $ 41,628 $ 27,264 Net prior service cost 32 (270) Deferred tax assets (9,637) (6,148) Net amount recognized $ 32,023 $ 20,846 Change in accumulated other comprehensive income (loss) $ 11,177 $ (4,066) Accumulated benefit obligation $ 79,236 $ 92,316 The change in the defined benefit obligations for the period was a result of the liabilities generating gains due to a large negative change in the interest crediting rate as well as an increase in the discount rate. The components of net periodic benefit cost are shown in the table that follows: December 31, (Dollars in thousands) 2022 2021 2020 Service cost $ 9,065 $ 9,128 $ 7,932 Interest cost 2,585 2,157 2,455 Expected return on assets (10,982) (10,118) (9,824) Amortization of prior service cost (302) (413) (413) Recognized net actuarial loss 1,636 2,611 2,334 Net periodic benefit (income) cost 2,002 3,365 2,484 Other changes recognized in accumulated other comprehensive income (loss) Net actuarial (gain) loss 16,001 (3,068) (2,001) Prior service cost 0 0 0 Amortization of prior service cost 302 413 413 Amortization of gain (1,636) (2,611) (2,334) Total recognized in accumulated other comprehensive income (loss) 14,667 (5,266) (3,922) Total recognized in net periodic benefit cost and accumulated other comprehensive income (loss) $ 16,669 $ (1,901) $ (1,438) The pension plan assumptions are shown in the table that follows: December 31, 2022 2021 2020 Benefit obligations Discount rate 5.50 % 2.89 % 2.55 % Rate of compensation increase 3.50 % 3.50 % 3.50 % Weighted average interest crediting rate 5.20 % 2.58 % 2.14 % Net periodic benefit cost Discount rate 2.89 % 2.55 % 3.33 % Expected return on plan assets 7.25 % 7.25 % 7.25 % Rate of compensation increase 3.50 % 3.50 % 3.50 % Weighted average interest crediting rate 2.58 % 2.14 % 2.82 % The fair value of the plan assets as of December 31, 2022 by asset category is shown in the table that follows: Fair Value Measurements (Dollars in thousands) Total Quoted Prices in Significant Significant Asset Category Cash $ 158 $ 158 $ 0 $ 0 U. S. Government agencies 4,602 0 4,602 0 Fixed income mutual funds 47,234 47,234 0 0 Equity mutual funds 67,316 67,316 0 0 Total assets in fair value hierarchy 119,310 114,708 4,602 0 Collective trusts 14,139 0 0 0 Investments at fair value $ 133,449 $ 114,708 $ 4,602 $ 0 The fair value of the plan assets as of December 31, 2021 by asset category is shown in the table that follows: Fair Value Measurements (Dollars in thousands) Total Quoted Prices in Significant Significant Asset Category Cash $ 122 $ 122 $ 0 $ 0 U. S. Government agencies 3,535 0 3,535 0 Fixed income mutual funds 63,526 63,526 0 0 Equity mutual funds 83,000 83,000 0 0 Total assets in fair value hierarchy 150,183 146,648 3,535 0 Collective trusts 13,199 0 0 0 Investments at fair value $ 163,382 $ 146,648 $ 3,535 $ 0 The pension plan utilizes values provided by third-party pricing vendors to price investment securities in accordance with the fair value hierarchy of the Fair Value Topic and reviews the pricing methodologies utilized by the pricing vendors to ensure that the fair value determination is consistent with the applicable accounting guidance. The level within the fair value hierarchy is based on the lowest level of input that is significant in the fair value measurement. The following methods, assumptions and valuation techniques were used by First Financial to measure the financial assets in the Company's pension plan. U.S. Government and Government Agency Securities. These securities are valued using matrix pricing models developed by a third party and consider standard input factors such as observable market data, benchmark yields, interest rate volatilities, broker/dealer quotes, credit spreads and new issue data. Matrix pricing is widely used to value securities without solely relying on quoted market prices for specific securities (Level 2). Mutual funds. Mutual funds held by the pension plan are open-end mutual funds that are registered with the U.S. Securities and Exchange Commission and are valued at the daily closing price as reported by the fund. These funds are required to publish their daily net asset value and to transact at that price. The mutual funds held by the Plan are deemed to be actively traded (Level 1). Collective trusts. The collective trusts are alternative investments valued at the net asset value of units of the collective trusts. The net asset value is used as a practical expedient to estimate fair value and is priced quarterly on a month lag. This practical expedient would not be used if it is determined to be probable that the fund will sell the investment for an amount different from the reported net asset value. Participant transactions (purchases and sales) may occur daily. If the plan initiates a full redemption of the collective trusts, the issuer reserves the right to require 12 months notification in order to ensure that securities liquidations will be carried out in an orderly business manner. Investments measured at fair value using net asset value per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in the hierarchy tables for such investments are intended to permit reconciliation to the fair value of plan assets at the end of the year. See Note 23 – Fair Value Disclosures for further information related to the framework for measuring fair value and the fair value hierarchy. The following benefit payments, which reflect expected future service, are expected to be paid: (Dollars in thousands) Expected benefit payments 2023 $ 5,810 2024 6,310 2025 7,056 2026 6,994 2027 8,497 Thereafter 46,009

REVENUE RECOGNITION

REVENUE RECOGNITION	12 Months Ended
	Dec. 31, 2022
Revenue Recognition and Deferred Revenue [Abstract]
REVENUE RECOGNITION	Revenue Recognition The majority of the Company's revenues come from sources that are outside of the scope of ASU 2014-09, Revenue from Contracts with Customers. Income sources that are outside of this standard include income earned on loans, leases, securities, derivatives and foreign exchange. The Company's services that fall within the scope of ASU 2014-09 are presented within Noninterest income and are recognized as revenue when the Company satisfies its obligation to the customer. Services within the scope of this guidance include service charges on deposits, trust and wealth management fees, bankcard income, gain/loss on the sale of OREO and investment brokerage fees. Service charges on deposit accounts. The Company earns revenues from its deposit customers for transaction-based fees, account maintenance fees and overdraft fees. Transaction-based fees, which include services such as ATM use fees, stop payment charges, statement rendering and ACH fees, are recognized at the time the transaction is executed as that is the point in time the Company fulfills the customer's request. Account maintenance fees, which relate primarily to monthly maintenance, are earned over the course of a month, representing the period over which the Company satisfies the performance obligation. Similarly, overdraft fees are recognized at the point in time that the overdraft occurs as this corresponds with the Company's performance obligation. Service charges on deposit accounts are withdrawn from the customer's deposit account. Trust and wealth management fees. Trust and wealth management fees are primarily asset-based, but can also include flat fees based upon a specific service rendered, such as tax preparation services. The Company’s performance obligation is generally satisfied over time and the resulting fees are recognized monthly, based upon the month-end market value of the assets under management and the applicable fees. The Company does not earn performance-based incentives. Optional services such as real estate sales and tax return preparation services are also available to existing trust and wealth management customers. The Company’s performance obligation for these transactional-based services is generally satisfied, and related revenue recognized, as incurred. Trust and wealth management fees also includes brokerage revenue. Brokerage revenue represents fees from investment brokerage services provided to customers by a third party provider. The Company receives commissions from the third-party service provider on a monthly basis based upon customer activity for the month. The fees are recognized monthly and a receivable is recorded until commissions are paid the following month. Because the Company (i) acts as an agent in arranging the relationship between the customer and the third-party service provider and (ii) does not control the services rendered to the customers, investment brokerage fees are presented net of related costs. Bankcard income. The Company earns interchange fees from cardholder transactions conducted through the Visa payment network. Interchange fees from cardholder transactions represent a percentage of the underlying transaction value and are recognized concurrent with the transaction processing services provided to the cardholder. Interchange income is presented on the Consolidated Statements of Income net of expenses. Gross interchange income for 2022 was $29.5 million, and was partially offset by $15.1 million of expenses within Noninterest income. Gross interchange income for 2021 was $27.9 million, and was partially offset by $13.6 million of expenses within Noninterest income, while gross interchange income for 2020 was $23.9 million, and was partially offset by $12.2 million of expenses within Noninterest income. Other. Other noninterest income includes other recurring revenue streams such as transaction fees, safe deposit rental income, insurance commissions, merchant referral income and gain (loss) on sale of OREO. Transaction fees primarily include check printing sales commissions, collection fees and wire transfer fees which arise from in-branch transactions. Safe deposit rental income arises from fees charged to the customer on an annual basis and recognized upon receipt of payment. Insurance commissions are agent commissions earned by the Company and earned upon the effective date of the bound coverage. Merchant referral income is associated with a program whereby the Company receives a share of processing revenue that is generated from clients that were referred by First Financial to the service provider. Revenue is recognized at the time when the transaction occurs. The Company records a gain or loss from the sale of OREO when control of the property transfers to the buyer, which generally occurs at the time of the executed deed. When the Company finances the sale of OREO to the buyer, the Company assesses whether the buyer is committed to perform their obligations under the contract and whether collectibility of the transaction price is probable. Once these criteria are met, the OREO asset is removed and the gain or loss on sale is recorded upon the transfer of control of the property to the buyer.

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	6 Months Ended
	Jun. 30, 2020
Equity [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	Accumulated Other Comprehensive Income (Loss) Shareholders’ equity is affected by transactions and valuations of asset and liability positions that require adjustments to accumulated other comprehensive income (loss). The related tax effects allocated to other comprehensive income and accumulated other comprehensive income (loss) are as follows: December 31, 2022 Total other comprehensive income (loss) Total accumulated (Dollars in thousands) Prior to Reclass Pre-tax Tax effect Net of tax Beginning balance Net activity Ending balance Unrealized gain (loss) on debt securities $ (444,257) $ 569 $ (444,826) $ 97,863 $ (346,963) $ 21,038 $ (346,963) $ (325,925) Retirement obligation (16,000) (1,334) (14,666) 3,489 (11,177) (20,846) (11,177) (32,023) Foreign currency translation (90) 0 (90) 0 (90) (625) (90) (715) Total $ (460,347) $ (765) $ (459,582) $ 101,352 $ (358,230) $ (433) $ (358,230) $ (358,663) December 31, 2021 Total other comprehensive income (loss) Total accumulated other (Dollars in thousands) Prior to Reclass Pre-tax Tax-effect Net of tax Beginning Balance Net Activity Ending Balance Unrealized gain (loss) on debt securities $ (67,759) $ (759) $ (67,000) $ 14,462 $ (52,538) $ 73,576 $ (52,538) $ 21,038 Retirement obligation 3,068 (2,198) 5,266 (1,200) 4,066 (24,912) 4,066 (20,846) Foreign currency translation (625) 0 (625) 0 (625) 0 (625) (625) Total $ (65,316) $ (2,957) $ (62,359) $ 13,262 $ (49,097) $ 48,664 $ (49,097) $ (433) December 31, 2020 Total other comprehensive income (loss) Total accumulated other (Dollars in thousands) Prior to Reclass Pre-tax Tax-effect Net of tax Beginning Balance Net Activity Ending Balance Unrealized gain (loss) on debt securities $ 36,643 $ (4,563) $ 41,206 $ (8,894) $ 32,312 $ 41,264 $ 32,312 $ 73,576 Retirement obligation 2,001 (1,921) 3,922 (893) 3,029 (27,941) 3,029 (24,912) Total $ 38,644 $ (6,484) $ 45,128 $ (9,787) $ 35,341 $ 13,323 $ 35,341 $ 48,664 The following table details the activity reclassified from accumulated other comprehensive income into income during the period: Amount Reclassified from Accumulated Other Comprehensive Income (1) December 31, (Dollars in thousands) 2022 2021 2020 Affected Line Item in the Consolidated Statements of Income Realized gains and losses on securities available-for-sale $ 569 $ (759) $ (4,563) Net gain (loss) on sales/transfers of investment securities Defined benefit pension plan Amortization of prior service cost (2) 302 413 413 Other noninterest expense Recognized net actuarial loss (2) (1,636) (2,611) (2,334) Other noninterest expense Amortization and settlement charges of defined benefit pension items (1,334) (2,198) (1,921) Total reclassifications for the period, before tax $ (765) $ (2,957) $ (6,484) (1) Negative amounts are debits to profit/loss. (2) Included in the computation of net periodic pension cost (see Note 17 - Employee Benefit Plans for additional details).

CAPITAL

CAPITAL	12 Months Ended
	Dec. 31, 2022
Banking Regulation, Total Capital [Abstract]
CAPITAL	Capital Risk-based capital. First Financial and its subsidiary, First Financial Bank, are subject to regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines and, additionally for banks, prompt corrective action regulations involve quantitative measures of assets, liabilities and certain off-balance sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators. Failure to meet minimum capital requirements can initiate regulatory action. The Board of Governors of the Federal Reserve System approved Basel III in order to strengthen the regulatory capital framework for all banking organizations, subject to a phase-in period for certain provisions. Basel III established and defined quantitative measures to ensure capital adequacy. These measures require First Financial to maintain minimum amounts and ratios of Common equity Tier 1 capital, Total and Tier 1 capital to risk-weighted assets and Tier 1 capital to average assets (Leverage ratio). Basel III includes a minimum ratio of Common equity Tier 1 capital to risk-weighted assets of 7.0% and a fully phased-in capital conservation buffer of 2.5% of risk-weighted assets. Further, the minimum ratio of Tier 1 capital to risk-weighted assets is 8.5% and all banks are subject to a 4.0% minimum leverage ratio, while the required Total risk-based capital ratio is 10.50%. Failure to maintain the required Common equity Tier 1 capital will result in potential restrictions on a bank’s ability to pay dividends, repurchase stock and pay discretionary compensation to its employees. The capital requirements also provide strict eligibility criteria for regulatory capital instruments and change the method for calculating risk-weighted assets in an effort to better identify riskier assets, such as highly volatile commercial real estate and nonaccrual loans. As of December 31, 2022, First Financial met all capital adequacy requirements to which it was subject. To be categorized as well-capitalized, First Financial must maintain minimum Total risk-based capital, Tier 1 risk-based capital and Tier 1 leverage ratios as set forth in the table that follows. The Company's most recent regulatory notifications categorized First Financial as "well-capitalized" under the regulatory framework for prompt corrective action. There have been no conditions or events since those notifications that management believes have changed the Company's categorization. Total regulatory capital exceeded the minimum requirement by $406.0 million on a consolidated basis at December 31, 2022. The following tables present the actual and required capital amounts and ratios as of December 31, 2022 and 2021 under the Basel III Capital Rules. Capital levels required to be considered "well capitalized" are based upon prompt corrective action regulations, as reflected in the Basel III Capital Rules. Actual Minimum capital PCA requirement to be (Dollars in thousands) Capital Ratio Capital Ratio Capital Ratio December 31, 2022 Common equity tier 1 capital to risk-weighted assets Consolidated $ 1,399,420 10.83 % $ 904,626 7.00 % N/A N/A First Financial Bank 1,581,328 12.26 % 903,244 7.00 % $ 838,726 6.50 % Tier 1 capital to risk-weighted assets Consolidated 1,443,698 11.17 % 1,098,475 8.50 % N/A N/A First Financial Bank 1,581,900 12.26 % 1,096,796 8.50 % 1,032,278 8.00 % Total capital to risk-weighted assets Consolidated 1,762,971 13.64 % 1,356,939 10.50 % N/A N/A First Financial Bank 1,640,671 12.71 % 1,354,865 10.50 % 1,290,348 10.00 % Leverage Consolidated 1,443,698 8.89 % 649,636 4.00 % N/A N/A First Financial Bank 1,581,900 9.76 % 648,607 4.00 % 810,759 5.00 % Actual Minimum capital PCA requirement to be (Dollars in thousands) Capital Ratio Capital Ratio Capital Ratio December 31, 2021 Common equity tier 1 capital to risk-weighted assets Consolidated $ 1,262,789 10.85 % $ 814,954 7.00 % N/A N/A First Financial Bank 1,513,175 13.02 % 813,731 7.00 % $ 755,607 6.50 % Tier 1 capital to risk-weighted assets Consolidated 1,306,571 11.22 % 989,587 8.50 % N/A N/A First Financial Bank 1,513,708 13.02 % 988,102 8.50 % 929,978 8.00 % Total capital to risk-weighted assets Consolidated 1,642,549 14.11 % 1,222,431 10.50 % N/A N/A First Financial Bank 1,589,570 13.67 % 1,220,597 10.50 % 1,162,473 10.00 % Leverage Consolidated 1,306,571 8.70 % 600,410 4.00 % N/A N/A First Financial Bank 1,513,708 10.10 % 599,578 4.00 % 749,472 5.00 % Share repurchases. Effective January 2022, First Financial's board of directors approved a stock repurchase plan (the 2022 Repurchase Plan), replacing the 2020 Repurchase Plan which became effective in January 2021. The 2022 Repurchase Plan continues for two years and authorizes the purchase of up to 5,000,000 shares of the Company's common stock and will expire in December 2023. First Financial did not repurchase any shares under the 2022 plan during 2022.

STOCK OPTIONS AND AWARDS

STOCK OPTIONS AND AWARDS	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
STOCK OPTIONS AND AWARDS	Stock Options and Awards First Financial follows the provisions of FASB ASC Topic 718, Compensation-Stock Compensation, which requires measurement of compensation cost for all stock-based awards at fair value on the date of grant and recognition of compensation expense over the service period for all awards expected to vest. First Financial recorded share-based compensation expense within salaries and employee benefits on the Consolidated Statements of Income of $13.4 million, $9.6 million and $7.7 million for the years ended December 31, 2022, 2021 and 2020, respectively, related to stock options and restricted stock awards. Total unrecognized compensation cost related to non-vested share-based compensation was $15.6 million at December 31, 2022 and is expected to be recognized over a weighted average period of 1.95 years. As of December 31, 2022, First Financial had two active stock-based compensation plans, the Amended and Restated 2012 Stock Plan and the 2020 Stock Plan. New awards may only be granted from the 2020 Stock Plan. At December 31, 2022, there were 2,951,070 shares available for issuance under the 2020 Stock Plan. In April 2018, in conjunction with the MSFG merger, First Financial assumed existing MSFG stock options, which were converted into options to purchase 83,551 shares of First Financial common stock. The converted MSFG options remain subject to all of the terms and conditions of the plan and grant agreements under which the MSFG Stock Options were originally issued. The assumed options were exercisable at the time of the merger and remain outstanding for 10 years after the initial grant date with all options expiring at the end of the exercise period. At December 31, 2022, 4,855 options were outstanding under the Plan, all of which expire on or before April 10, 2023. First Financial utilizes the Black-Scholes valuation model to determine the fair value of stock options granted. In addition to the stock option strike price, the Black-Scholes valuation model incorporates the following assumptions: the expected dividend yield based on historical dividend payouts; the expected stock price volatility based on the historical volatility of Company stock for a period approximating the expected life of the options; the risk-free rate based on the U.S. Treasury yield curve in effect at the time of grant for periods corresponding with the expected life of the option; and the expected option life represented by the period of time the options are expected to be outstanding, and is based on historical trends. No new options were granted in 2022, 2021 or 2020. Stock option activity for the year ended December 31, 2022, is summarized as follows: (Dollars in thousands, except share and per share data) Number of shares Weighted Weighted average Aggregate intrinsic value Outstanding at beginning of year 20,515 $ 10.98 Granted 0 0.00 Exercised (15,660) 11.32 Forfeited or expired 0 0.00 Outstanding at end of year 4,855 $ 9.86 0.27 years $ 70 Exercisable at end of year 4,855 $ 9.86 0.27 years $ 70 The intrinsic value of stock options is defined as the difference between the current market value and the exercise price. First Financial uses treasury shares purchased under the Company's share repurchase program to satisfy share-based exercises. 2022 2021 2020 Total intrinsic value of options exercised $ 208 $ 114 $ 86 Cash received from exercises $ 177 $ 64 $ 72 Tax benefit from exercises $ 3,095 $ 2,229 $ 1,776 Restricted stock awards are recorded at fair value as of the grant date as a component of shareholders' equity and amortized on a straight-line basis to salaries and benefits expense over the specified vesting periods, which is currently three years for employees and one year for non-employee directors. The vesting of these awards for employees and non-employee directors may require a service period to be met, and certain awards may also require performance measures to be met. Activity in restricted stock for the previous three years ended December 31 is summarized as follows: 2022 2021 2020 Number of shares Weighted Number of shares Weighted Number of shares Weighted Nonvested at beginning of year 839,733 $ 22.30 763,283 $ 22.04 530,569 $ 27.19 Granted 945,193 23.57 539,020 22.69 503,311 18.62 Vested (407,386) 28.05 (386,848) 22.24 (233,828) 26.07 Forfeited (148,194) 18.40 (75,722) 22.86 (36,769) 23.79 Nonvested at end of year 1,229,346 $ 21.28 839,733 $ 22.30 763,283 $ 22.04 The fair value of restricted stock is determined based on the number of shares granted and the quoted price of First Financial's common stock. The fair value of restricted stock vested during 2022, 2021 and 2020 was $11.4 million, $8.6 million and $6.1 million, respectively.

EARNINGS PER COMMON SHARE

EARNINGS PER COMMON SHARE	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
EARNINGS PER COMMON SHARE	Earnings per Common Share The following table sets forth the computation of basic and diluted earnings per share: (Dollars in thousands, except share and per share data) 2022 2021 2020 Numerator Net income $ 217,612 $ 205,160 $ 155,810 Denominator Basic earnings per common share - weighted average shares 93,528,712 95,034,690 97,363,952 Effect of dilutive securities Employee stock awards 1,058,139 862,695 729,146 Diluted earnings per common share - adjusted weighted average shares 94,586,851 95,897,385 98,093,098 Earnings per share available to common shareholders Basic $ 2.33 $ 2.16 $ 1.60 Diluted $ 2.30 $ 2.14 $ 1.59 Stock options and warrants with exercise prices greater than the average market price of the common shares are excluded from the computation of net income per diluted share, as they would be antidilutive. Using the end of period price of the Company's common shares, there were no antidilutive options at December 31, 2022, 2021, or 2020.

FAIR VALUE DISCLOSURES

FAIR VALUE DISCLOSURES	6 Months Ended
	Jun. 30, 2020
Fair Value Disclosures [Abstract]
FAIR VALUE DISCLOSURES	Fair Value Disclosures The fair value framework as disclosed in the Fair Value Topic includes a hierarchy which focuses on prioritizing the inputs used in valuation techniques. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities (Level 1), a lower priority to observable inputs other than quoted prices in active markets for identical assets and liabilities (Level 2) and the lowest priority to unobservable inputs (Level 3). When determining the fair value measurements for assets and liabilities, First Financial looks to active markets to price identical assets or liabilities whenever possible and classifies such items in Level 1. When identical assets and liabilities are not traded in active markets, First Financial looks to observable market data for similar assets and liabilities and classifies such items as Level 2. Certain assets and liabilities are not actively traded in observable markets and First Financial must use alternative techniques, based on unobservable inputs, to determine the fair value and classifies such items as Level 3. The level within the fair value hierarchy is based on the lowest level of input that is significant in the fair value measurement. The estimated fair values of First Financial's financial instruments not measured at fair value on a recurring or nonrecurring basis in the consolidated financial statements were as follows: Carrying Estimated fair value (Dollars in thousands) value Total Level 1 Level 2 Level 3 December 31, 2022 Financial assets Cash and short-term investments $ 595,683 $ 595,683 $ 595,683 $ 0 $ 0 Investment securities held-to-maturity 84,021 76,485 0 76,485 0 Other investments 143,160 143,160 1,171 132,853 9,136 Loans and leases 10,165,994 9,916,353 0 0 9,916,353 Accrued interest receivable 63,721 63,721 0 16,233 47,488 Financial liabilities Deposits 12,701,177 12,670,747 0 12,670,747 0 Short-term borrowings 1,287,156 1,287,156 1,287,156 0 0 Long-term debt 346,672 348,041 0 348,041 0 Accrued interest payable 11,150 11,150 3,835 7,315 0 Carrying Estimated Fair Value (Dollars in thousands) Value Total Level 1 Level 2 Level 3 December 31, 2021 Financial assets Cash and short-term investments $ 434,842 $ 434,842 $ 434,842 $ 0 $ 0 Investment securities held-to-maturity 98,420 99,898 0 99,898 0 Other investments 102,971 102,971 1,331 92,025 9,615 Loans and leases 9,156,307 9,172,111 0 0 9,172,111 Accrued interest receivable 44,627 44,627 0 15,170 29,457 Financial liabilities Deposits 12,871,954 12,869,567 0 12,869,567 0 Short-term borrowings 296,203 296,203 296,203 0 0 Long-term debt 409,832 411,569 0 411,569 0 Accrued interest payable 4,498 4,498 0 4,498 0 The following methods, assumptions and valuation techniques were used by First Financial to measure different financial assets and liabilities at fair value on a recurring or nonrecurring basis. Investment securities. Investment securities classified as available-for-sale are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted market prices, when available (Level 1). If quoted market prices are not available, fair values are measured utilizing independent valuation techniques of identical or similar investment securities. First Financial compiles prices from various sources who may apply such techniques as matrix pricing to determine the value of identical or similar investment securities (Level 2). Matrix pricing is a mathematical technique widely used in the banking industry to value investment securities without relying exclusively on quoted prices for the specific investment securities but rather relying on the investment securities’ relationship to other benchmark quoted investment securities. Any investment securities not valued based upon the methods previously described are considered Level 3. First Financial utilizes values provided by third-party pricing vendors to price the investment securities portfolio in accordance with the fair value hierarchy of the Fair Value Topic and reviews the pricing methodologies utilized by the pricing vendors to ensure that the fair value determination is consistent with the applicable accounting guidance. First Financial’s pricing process includes a series of quality assurance activities where prices are compared to recent market conditions, historical prices and other independent pricing services. Further, the Company periodically validates the fair value of a sample of securities in the portfolio by comparing the fair values to prices from other independent sources for the same or similar securities. First Financial analyzes unusual or significant variances, conducts additional research with the pricing vendor, and if necessary, takes appropriate action based on its findings. The results of the quality assurance process are incorporated into the selection of pricing providers by the portfolio manager. Loans held for sale. The fair value of the Company’s residential mortgage loans held for sale is determined on a recurring basis based on quoted prices for similar loans in active markets, and therefore, is classified as Level 2 in the fair value hierarchy. Derivatives. The fair values of derivative instruments are based primarily on a net present value calculation of the cash flows related to the interest rate swaps and foreign exchange contracts at the reporting date, using primarily observable market inputs such as interest rate yield curves and currency exchange rates, which represents the cost to terminate the swap if First Financial should choose to do so. Additionally, First Financial utilizes an internally-developed model to value the credit risk component of derivative assets and liabilities, which is recorded as an adjustment to the fair value of the derivative asset or liability on the reporting date. Derivative instruments are classified as Level 2 in the fair value hierarchy. Collateral dependent loans. Collateral dependent loans carried at fair value have been partially charged-off or receive specific allocations of the allowance for credit losses. For collateral dependent loans, fair value is generally based on real estate appraisals, a calculation of enterprise value or a valuation of business assets including equipment, inventory and accounts receivable. These loans had a principal amount of $11.9 million and $28.8 million at December 31, 2022 and December 31, 2021, respectively, with a valuation allowance of $3.7 million and $9.7 million at December 31, 2022 and December 31, 2021, respectively. The value of real estate collateral is determined utilizing an income or market valuation approach based on an appraisal conducted by an independent, licensed third-party appraiser (Level 3). These appraisals may utilize a single valuation approach or a combination of approaches including the comparable sales approach and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Collateral is then adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation, and management’s expertise and knowledge of the client and the client’s business, resulting in a Level 3 fair value classification. Collateral dependent loans are evaluated on a quarterly basis for additional write-downs and are adjusted accordingly. Enterprise value is defined as imputed value for the entire underlying business. To determine an appropriate range of enterprise value, FFB relies on a standardized set of valuation methodologies that take into account future projected cash flows, market based multiples as well as asset values. Valuations involve both quantitative and qualitative considerations and professional judgments concerning differences in financial and operating characteristics in addition to other factors that may impact values over time (Level 3). The value of business equipment is based on an outside appraisal, if deemed significant, or the net book value on the applicable borrower financial statements. Likewise, values for inventory and accounts receivable collateral are based on borrower financial statement balances or aging reports on a discounted basis as appropriate (Level 3). The fair value of collateral dependent loans is measured at fair value on a nonrecurring basis. Any fair value adjustments are recorded in the period incurred as provision for credit losses on the Consolidated Statements of Income. OREO. Assets acquired through loan foreclosure are recorded at fair value less costs to sell, with any difference between the fair value of the property and the carrying value of the loan recorded as a charge-off establishing a new cost basis. Subsequent changes in value are reported as adjustments to the carrying amount and are recorded in noninterest expense. The carrying value of OREO is not re-measured to fair value on a recurring basis, but is subject to fair value adjustments when the carrying value differs from the fair value, less estimated selling costs. Fair value is based on recent real estate appraisals and is updated at least annually. The Company classifies OREO in level 3 of the fair value hierarchy. The financial assets and liabilities measured at fair value on a recurring basis in the consolidated financial statements, were as follows: Fair Value Measurements Using Assets/Liabilities (Dollars in thousands) Level 1 Level 2 Level 3 at Fair Value December 31, 2022 Assets Investment securities available-for-sale $ 32,696 $ 3,341,096 $ 35,856 $ 3,409,648 Loans held for sale 0 7,918 0 7,918 Interest rate derivative contracts 0 152,846 0 152,846 Foreign exchange derivative contracts 0 204,882 0 204,882 Total $ 32,696 $ 3,706,742 $ 35,856 $ 3,775,294 Liabilities Interest rate derivative contracts $ 0 $ 153,119 $ 0 $ 153,119 Foreign exchange derivative contracts 0 204,882 0 204,882 Total $ 0 $ 358,001 $ 0 $ 358,001 Fair Value Measurements Using Assets/Liabilities (Dollars in thousands) Level 1 Level 2 Level 3 at Fair Value December 31, 2021 Assets Investment securities available-for-sale $ 34,776 $ 4,134,889 $ 38,181 $ 4,207,846 Loans held for sale 0 29,482 0 29,482 Interest rate derivative contracts 0 92,328 0 92,328 Foreign exchange derivative contracts 0 120,768 0 120,768 Total $ 34,776 $ 4,377,467 $ 38,181 $ 4,450,424 Liabilities Interest rate derivative contracts $ 0 $ 92,444 $ 0 $ 92,444 Foreign exchange derivative contracts 0 120,768 0 120,768 Total $ 0 $ 213,212 $ 0 $ 213,212 The following table presents a reconciliation for certain AFS securities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the years ended December 31, 2022, 2021 and 2020. (dollars in thousands) December 31, 2022 December 31, 2021 December 31, 2020 Beginning balance $ 38,181 $ 40,575 $ 9,190 Accretion (amortization) (56) (38) 1 Increase (decrease) in fair value 45 44 (17) Purchases (settlements) (2,313) (2,400) 31,401 Ending balance $ 35,857 $ 38,181 $ 40,575 Certain financial assets and liabilities are measured at fair value on a nonrecurring basis. Adjustments to the fair market value of these assets usually result from the application of fair value accounting or write-downs of individual assets. The following table summarizes financial assets and liabilities measured at fair value on a nonrecurring basis: Fair Value Measurements Using (Dollars in thousands) Level 1 Level 2 Level 3 December 31, 2022 Assets Collateral dependent loans Commercial $ 0 $ 0 $ 4,240 Commercial real estate 0 0 4,015 OREO 0 0 0 Operating leases 0 0 0 Fair Value Measurements Using (Dollars in thousands) Level 1 Level 2 Level 3 December 31, 2021 Assets Collateral dependent loans Commercial $ 0 $ 0 $ 4,449 Commercial real estate 0 0 14,618 OREO 0 0 0

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	12 Months Ended
	Dec. 31, 2022
Business Combinations [Abstract]
BUSINESS COMBINATIONS	Business Combination On December 31, 2021, the Company completed its acquisition of Summit Funding Group, Inc. and its subsidiaries. Summit is a privately held, full service, equipment financing company that originates, purchases, sells and services equipment leases to commercial businesses in the United States and Canada. Upon completion of the transaction, Summit became a subsidiary of the Bank and continues to operate as Summit Funding Group, taking advantage of its existing brand recognition within the equipment financing industry. Operating results related to the Summit acquisition were immaterial to 2021 consolidated financial statements but are included in the Consolidated Statements of Income for the year ended December 31,2022. Pursuant to the purchase agreement, First Financial agreed to acquire all of the issued and outstanding equity securities of Summit for aggregate consideration of approximately $127.1 million consisting of $113.5 million in cash and $10.0 million of First Financial common stock, and a $3.6 million earn-out payment. Pursuant to the purchase agreement, the “earn-out” payments are payable annually for each of the five years following the closing of the acquisition, contingent upon the results of Summit's operations. First Financial incurred expenses related to the Summit acquisition of $0.6 million and $2.6 million during the years ended December 31, 2022 and 2021, respectively. The Summit transaction was accounted for using the acquisition method of accounting and accordingly, assets acquired, liabilities assumed and consideration exchanged were recorded at estimated fair value on the acquisition date in accordance with FASB ASC Topic 805, Business Combinations. The fair value measurements of assets acquired and liabilities assumed were $185.8 million and $122.5 million, respectively, and included $41.9 million of financing leases and $75.3 million of operating leases. These present value measurements were subject to refinement for up to one year after the closing date of the acquisition as additional information relative to closing date fair values become available. The measurement period ended in December 2022. Goodwill arising from the Summit acquisition was $63.7 million and reflects the business’s high growth potential and the expectation that the acquisition will provide additional revenue growth with the expansion of the Bank's leasing business. The goodwill is not deductible for income tax purposes as the transaction was accounted for as a tax-free exchange. For further detail, see Note 10 – Goodwill and Other Intangible Assets. The following table provides the purchase price calculation as of the acquisition date, identifiable assets purchased and liabilities assumed at their estimated fair value. (Dollars in thousands) Summit Purchase consideration Cash consideration $ 102,994 Liabilities paid with cash concurrent with close 10,487 Stock consideration 10,000 Earn out 3,606 Total purchase consideration 127,087 Assets acquired Cash 4,413 Finance leases 41,894 Premises and equipment 707 Operating leases 75,309 Intangible assets 34,585 Other assets 28,927 Total assets acquired 185,835 Liabilities assumed Long-term borrowings 96,511 Other liabilities 25,973 Total liabilities assumed 122,484 Net identifiable assets 63,351 Goodwill $ 63,736

FIRST FINANCIAL BANCORP. (PAREN

FIRST FINANCIAL BANCORP. (PARENT COMPANY ONLY) FINANCIAL INFORMATION	12 Months Ended
	Dec. 31, 2022
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	First Financial Bancorp. (Parent Company Only) Financial Information Balance Sheets December 31, (Dollars in thousands) 2022 2021 Assets Cash $ 91,013 $ 49,746 Investment securities 1,681 1,836 Subordinated notes from subsidiaries 7,500 7,500 Investment in subsidiaries Commercial bank 2,161,338 2,447,095 Non-banks 11,246 10,417 Total investment in subsidiaries 2,172,584 2,457,512 Premises and equipment 283 1,311 Other assets 86,355 77,132 Total assets $ 2,359,416 $ 2,595,037 Liabilities Short-term borrowings $ 0 $ 20,000 Subordinated notes 311,707 310,864 Dividends payable 1,271 1,042 Other liabilities 5,065 4,189 Total liabilities 318,043 336,095 Shareholders’ equity 2,041,373 2,258,942 Total liabilities and shareholders’ equity $ 2,359,416 $ 2,595,037 Statements of Income and Comprehensive Income (Loss) Years Ended December 31, (Dollars in thousands) 2022 2021 2020 Income Interest income $ 37 $ 34 $ 27 Noninterest income 13 215 0 Net gain (loss) on equity securities (156) 448 272 Dividends from subsidiaries 171,900 202,000 81,725 Total income 171,794 202,697 82,024 Expenses Interest expense 16,624 15,900 14,172 Salaries and employee benefits 13,547 9,784 8,004 Professional services 256 2,343 1,160 Other 5,581 5,186 5,163 Total expenses 36,008 33,213 28,499 Income before income taxes and equity in undistributed net earnings of subsidiaries 135,786 169,484 53,525 Income tax expense (benefit) (8,523) (7,787) (6,145) Equity in undistributed earnings (loss) of subsidiaries 73,303 27,889 96,140 Net income $ 217,612 $ 205,160 $ 155,810 Comprehensive income (loss) $ (140,618) $ 156,063 $ 191,151 Statements of Cash Flows Years Ended December 31, (Dollars in thousands) 2022 2021 2020 Operating activities Net income $ 217,612 $ 205,160 $ 155,810 Adjustments to reconcile net income to net cash provided by operating activities Equity in undistributed (earnings) loss of subsidiaries (73,303) (27,889) (96,140) Depreciation and amortization 860 859 712 Stock-based compensation expense 13,379 9,635 7,678 Unrealized (gain) loss on equity securities 156 (448) (272) Deferred income taxes (475) (224) (158) (Decrease) increase in dividends payable 229 368 (175) (Decrease) increase in other liabilities 634 (751) (22) Decrease (increase) in other assets (8,748) (8,096) 8,907 Net cash provided by (used in) operating activities 150,344 178,614 76,340 Investing activities Capital contributions to subsidiaries 0 (113,152) 0 Other 1,011 0 0 Net cash (used in) provided by investing activities 1,011 (113,152) 0 Financing activities (Decrease) increase in short-term borrowings (20,000) 20,000 0 Proceeds from long-term borrowings 0 (10,592) 150,000 Cash dividends paid on common stock (86,606) (87,316) (89,691) Purchases of common stock 0 (108,077) (16,686) Proceeds from exercise of stock options, net of shares purchased 177 64 72 Other (3,659) (2,697) (3,002) Net cash provided by (used in) financing activities (110,088) (188,618) 40,693 Net increase (decrease) in cash 41,267 (123,156) 117,033 Cash at beginning of year 49,746 172,902 55,869 Cash at end of year $ 91,013 $ 49,746 $ 172,902

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2022
Basis of Presentation Policy	Basis of presentation. The Consolidated Financial Statements of First Financial Bancorp., a financial holding company, principally serving Ohio, Indiana, Kentucky and Illinois, include the accounts and operations of First Financial and its wholly owned subsidiary, First Financial Bank. All significant intercompany transactions and accounts have been eliminated in consolidation. Certain reclassifications of prior years' amounts have been made to conform to current year presentation. Such reclassifications had no effect on net earnings.
Use of Estimates, Policy	Use of estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates, assumptions and judgments that affect the amounts reported in the Consolidated Financial Statements and accompanying Notes. Actual realized amounts could differ materially from those estimates. COVID-19. First Financial's operations and financial results were significantly impacted by the COVID-19 pandemic. The spread of COVID-19 caused significant economic disruption throughout the United States as state and local governments issued stay at home orders and temporarily closed non-essential businesses. The full financial impact from the pandemic is unknown at this time, however prolonged disruption may adversely impact several industries within the Company's geographic footprint and impair the ability of First Financial's customers to fulfill their contractual obligations to the Company. This could cause First Financial to experience a material adverse effect on business operations, asset valuations, financial condition and results of operations. Material adverse impacts may include all or a combination of valuation impairments on First Financial's intangible assets, investments, loans, mortgage servicing rights or counter-party risk derivatives.
Cash and Cash Equivalents, Policy	Cash and due from banks. Cash and due from banks consist of currency, coin and cash items due from banks. Cash items due from banks include noninterest-bearing balances that are on deposit at other depository institutions.
Investment, Policy	Investment securities. First Financial classifies debt securities into three categories: HTM, trading and AFS. Management classifies investment securities into the appropriate category at the time of purchase and re-evaluates that classification as deemed appropriate. Investment securities are classified as HTM when First Financial has the positive intent and ability to hold the securities to maturity. HTM securities are recorded at amortized cost. Investment securities classified as trading are held principally for resale in the near-term and are recorded at fair value. Fair value is determined using quoted market prices. Gains or losses on trading securities, both realized and unrealized, are reported in noninterest income. Investment securities not classified as either HTM or trading are classified as AFS. AFS securities are recorded at fair value, with the unrealized gains and losses, net of tax, reported as a separate component of accumulated other comprehensive income (loss) in shareholders' equity. The amortized cost of investment securities classified as either HTM or AFS on purchased callable debt securities is adjusted for amortization of premiums to the earliest call date if the call feature meets certain criteria. Otherwise, premiums are amortized to maturity similar to discounts on callable debt securities, or in the case of mortgage-backed securities, over the estimated life of the security. Such amortization and accretion are considered an adjustment to the yield on the security and included in interest income from investments. Interest and dividends are also included in interest income from investment securities in the Consolidated Statements of Income. Realized gains and losses are based on the amortized cost of the security sold using the specific identification method. Other investments. Other investments include holdings in FRB and FHLB stock, which are both carried at cost as well as equity securities, including class B Visa shares which are carried at fair value. Changes in the fair value of equity securities are recorded in Net gain (loss) on equity securities in the Consolidated Statements of Income.
Financing Receivable, Held-for-sale [Policy Text Block]	Loans held for sale. Loans held for sale consist of residential real estate loans newly originated for the purpose of sale to third parties, and in certain circumstances, loans previously originated that have been specifically identified by management for sale based on predetermined criteria. Loans held for sale are carried at fair value. Any subsequent change in the carrying value of
Finance, Loans and Leases Receivable, Policy	Loans and leases. Loans and leases for which First Financial has the intent and ability to hold for the foreseeable future, or until maturity or payoff, are classified in the Consolidated Balance Sheets as loans and leases. Loans and leases are carried at the principal amount outstanding, net of unamortized deferred loan origination fees and costs, and net of unearned income. Loan origination and commitment fees received, as well as certain direct loan origination costs paid, are deferred, and the net amount is amortized as an adjustment to the related loan's yield. Interest income on loans and leases is recorded on an accrual basis. When a loan is classified as nonaccrual, the accrual of interest income is discontinued and previously accrued, but unpaid interest is reversed. Any payments received while a loan is classified as nonaccrual are applied as a reduction to the carrying value of the loan. A loan may return to accrual status if collection of future principal and interest payments is no longer doubtful.
Credit Loss, Financial Instrument	Allowance for credit losses - held-to-maturity securities . Management measures expected credit losses on held-to-maturity debt securities on a collective basis by security type. The estimate of expected credit losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. Management classifies the held-to-maturity portfolio into the following major security types: Mortgage-backed, CMOs, Obligations of state and other political subdivisions and Other. Nearly all of the HTM securities held by the Company are issued by U.S. government entities and agencies. These securities are either explicitly or implicitly guaranteed by the U.S. government, are highly rated by major rating agencies and have a long history of no credit losses. The remainder of the Company's HTM securities are non-agency collateralized mortgage obligations and obligations of state and other political subdivisions which currently carry ratings no lower than A+. Accrued interest receivable on held-to maturity debt securities, which totaled $0.4 million and $0.2 million as of December 31, 2022 and 2021, respectively, is excluded by policy election from the estimate of credit losses. Allowance for credit losses - available-for-sale securities. For AFS debt securities in an unrealized loss position, the Company first assesses whether it intends to sell, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For debt securities available-for-sale that do not meet the aforementioned criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for credit losses is recorded, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for credit loss is recognized in other comprehensive income (loss). Changes in the allowance for credit losses are recorded as provision for credit loss expense. Losses are charged against the allowance when management believes the uncollectibility of an AFS security is confirmed or when either of the criteria regarding intent or requirement to sell is met. Accrued interest receivable on AFS debt securities, which totaled $15.9 million and $14.9 million as of December 31, 2022 and 2020, respectively, is excluded from the estimate of credit losses.
Loans and Leases Receivable, Allowance for Loan Losses Policy	Allowance for credit losses - loans and leases. T he allowance for credit losses is a valuation account that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. Management's determination of the adequacy of the ACL is based on an assessment of the expected credit losses on loan and leases over their expected life. The ACL is increased by provision expense and decreased by charge-offs, net of recoveries of amounts previously charged-off. Loans are charged off when management believes that the collection of the princ ipal amount owed in full, either through payments from the borrower or a guarantor or from the liquidation of collateral is unlikely. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. Any interest that is accrued bu t not collected is reversed against interest income when a loan is placed on nonaccrual status, which typically occurs prior to charging off all, or a portion, of a loan. The Company made the policy election to exclude accrued interest receivable on loans and leases from the estimate of credit losses. Management estimates the allowance using relevant available information from both internal and external sources, relating to past events, current conditions and reasonable and supportable forecasts. Historical credit loss experience paired with economic forecasts provide the basis for the quantitatively modeled estimation of expected credit losses. First Financial adjusts its quantitative model, as necessary, to reflect conditions not already considered therein. These adjustments are commonly known as the Qualitative Framework. First Financial quantitatively models expected credit loss using PD, LGD and EAD over the R&S forecast period, reversion and post-reversion periods. Utilizing third-party software, First Financial forecasts PD by using a parameterized transition matrix approach. Average transition matrices are calculated over the TTC period, which was defined as the period from December 2007 to December 2016. TTC transition matrices are adjusted under forward-looking macroeconomic expectations to obtain R&S forecasts. First Financial is not required to develop forecasts over the full contractual term of the financial asset or group of financial assets. Rather, for periods beyond which the entity is able to make or obtain R&S forecasts of expected credit losses, the Company reverts in a straight line manner over a one year period to an average TTC loss level that is reflective of the prepayment adjusted contractual term of the financial asset or group of financial assets. First Financial elected a two year R&S period which is forecasted using econometric data sourced from Moody's, an industry-leading independent third party. FFB utilizes a non-parametric loss curve approach embedded within a third-party software for estimating LGD. The PD multiplied by LGD produces an expected loss rate that, when calculating the ACL, is applied to contractual loan cash flows, adjusted for expected future rates of principal prepayments. The Company adjusts its quantitative model for certain qualitative factors to reflect the extent to which management expects current conditions and R&S forecasts to differ from the conditions that existed for the period over which historical information was evaluated. The Qualitative Framework reflects changes related to relevant data, such as changes in asset quality trends, portfolio growth and composition, national and local economic factors, credit policy and administration and other factors not considered in the base quantitative model. Loans that do not share risk characteristics are evaluated on an individual basis. First Financial will typically evaluate on an individual basis any loans that are on nonaccrual, designated as a TDR, or reasonably expected to be designated as a TDR that are greater than $250,000. When management determines that foreclosure is probable or when repayment is expected to be provided substantially through the operation or sale of underlying collateral, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs, as applicable. For loans evaluated on an individual basis that are not determined to be collateral dependent, a discounted cash flow analysis is performed to determine expected credit losses. Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals and modifications unless either of the following applies: management has a reasonable expectation at the reporting date that a troubled debt restructuring will be executed with an individual borrower or the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company. Credit card receivables do not have stated maturities. In determining the estimated life of a credit card receivable, management first estimates the future cash flows expected to be received and then applies those expected future cash flows to the credit card balance. Significant downturns in circumstances relating to loan quality and economic conditions could result in a requirement for additional allowance. Likewise, an upturn in loan quality and improved economic conditions may allow a reduction in the required allowance. In either instance, unanticipated changes could have a significant impact on results of operations.
Commitments and Contingencies, Policy	Allowance for credit losses - unfunded commitments . First Financial estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life consistent with the Company's ACL methodology for loans and leases. A djustments to the reserve for unfunded commitments are recorded in Provision for credit losses - unfunded commitments in the Consolidated Statements of Income. The reserve for unfunded commitments is included in Accrued interest and other liabilities on the Consolidated Balance Sheets.
Property, Plant and Equipment, Policy	Premises and equipment. Premises and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation and amortization are principally computed on the straight-line method over the estimated useful lives of the assets. Useful lives generally range from 10 to 40 years for building and building improvements; 3 to 10 years for furniture, fixtures
Lessor, Leases	Operating Leases. First Financial provides financing for various types of equipment through a variety of leasing arrangements. Operating leases are carried at the aggregate of lease payments plus estimated residual value of the leased equipment, less unearned income. The Company recognizes income over the term of the lease using the constant effective yield method. Lease residual values are reviewed for impairment at least annually. Depreciation expense related to operating lease equipment is recorded in Leasing business expense on the Consolidated Statements of Income.
Bank Owned Life Insurance [Policy Text Block]	Bank-owned life insurance. First Financial purchases and is the owner and beneficiary of life insurance policies on the lives of certain employees . The Bank invests in these policies to provide an efficient form of funding for long-term retirement and other employee benefits costs. The policies are included within Accrued interest and other assets in the Consolidated Balance Sheets at each policy’s respective cash surrender value. Changes in the cash surrender value of these policies are recorded in Other noninterest income in the Consolidated Statements of Income.
Goodwill and Intangible Assets, Goodwill, Policy	Goodwill. Under accounting for business combinations, the net assets of entities acquired by First Financial are recorded at their estimated fair value at the date of acquisition. The excess cost of the acquisition over the fair value of net assets acquired is recorded as goodwill. Goodwill and other intangible assets deemed to have indefinite lives are not amortized, but are subject to annual impairment tests. The Company is required to evaluate goodwill for impairment on an annual basis or whenever events or changes in circumstances indicate that the carrying value may not be recoverable. First Financial performs its annual impairment test effective October 1, absent events or changes in circumstances that indicate the carrying value of goodwill may not be recoverable. The Company’s goodwill is accounted for in a single reporting unit representing the consolidated entity. When required, management's quantitative impairment analysis utilizes a discounted cash flow model for the income approach and the market multiple methodology and comparable transaction methodology as the market approach. These valuation methodologies utilize key assumptions that include forecasts of revenues and expenses derived from internal management projections for a period of five years, changes in working capital estimates, company specific discount rate derived from a rate build up approach, externally sourced bank peer group market multiples and externally sourced bank peer group change in control premium, all of which are highly subjective and require significant management judgment. Changes in these key assumptions, as well as downturns in economic or business conditions, could materially affect our estimate of the reporting unit fair value and could affect our conclusion regarding the existence of potential impairment. In 2022, management evaluated goodwill for impairment using a qualitative analysis.
Other intangible assets, Policy	Other intangible assets. Other intangible assets consist primarily of core deposit, customer list, MSR and other miscellaneous intangibles. CDI represent the estimated value of acquired customer deposit relationships. CDI are recorded at fair value at the date of acquisition and are based on a discounted cash flow methodology that gives appropriate consideration to expected customer attrition rates, cost of the deposit base, reserve requirements and the net maintenance cost attributable to customer deposits. Core deposit intangibles are amortized on an accelerated basis over their estimated useful lives. First Financial recorded a customer list intangible asset in conjunction with the Bannockburn and Summit mergers to account for the obligation or advantage on the part of either the Company or the customer to continue pre-existing relationships subsequent to the mergers. Customer list intangible assets are amortized on a straight-line basis over their estimated useful lives. Other intangible assets also include purchase commissions, non-compete agreements and trade name intangibles. Mortgage servicing rights are servicing fees First Financial receives from selling fixed and adjustable-rate residential mortgage loans where it obtains servicing responsibilities. In those sales, the First Financial obtained servicing responsibilities and provided certain standard representations and warranties; however, the investors have no recourse to the Company’s other assets for failure of debtors to pay when due. First Financial receives servicing fees based on a percentage of the outstanding balance. M ortgage servicing rights are measured at fair value with changes in fair value reported in Other noninterest income in the Consolidated Statements of Income. The market value of the mortgage servicing rights is estimated by calculating the present value of estimated future net servicing cash flows, taking into consideration actual and expected mortgage loan
Loan Commitments, Policy	Loan commitments are agreements to extend credit to a client absent any violation of conditions established in the commitment agreement.  Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee.  Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements.  The amount of collateral obtained, if deemed necessary by First Financial upon extension of credit, is based on management’s credit evaluation of the client.  The collateral held varies, but may include securities, real estate, inventory, plant or equipment.
Other Real Estate Owned Policy	Other real estate owned. OREO consists of properties acquired by the Company primarily through the loan foreclosure or repossession process, or other resolution activity that results in partial or total satisfaction of problem loans. OREO properties are recorded at fair value, less estimated disposal costs (net realizable value) establishing a new cost basis. Physical possession of residential real estate property collateralizing a consumer mortgage loan occurs when legal title is obtained upon completion of foreclosure or when the borrower conveys all interest in the property to satisfy the loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Losses arising at the time of acquisition of such properties are charged against the ACL. Management performs periodic valuations to assess the adequacy of recorded OREO balances and subsequent changes in the carrying value of OREO properties are recorded in the Consolidated Statements of Income. Improvements to OREO properties may be capitalized if the improvements contribute to the overall value of the property, but may not be capitalized in excess of the net realizable value of the property. When management disposes of an OREO property, any gains or losses realized at the time of disposal are reflected in the Consolidated Statements of Income.
Affordable Housing Program Policy	Affordable housing projects. First Financial has investments in certain qualified affordable housing projects. These projects are indirect federal subsidies that provide tax incentives to encourage investment in the development, acquisition and rehabilitation of affordable rental housing, and allow investors to claim tax credits and other tax benefits (such as deductions from taxable income for operating losses) on their federal income tax returns. The principal risk associated with qualified affordable housing investments is the potential for noncompliance with the tax code requirements, such as failure to rent properties to qualified tenants, resulting in unavailability or recapture of the tax credits and other tax benefits. Investments in affordable housing projects are included in Accrued interest and other assets in the Consolidated Balance Sheets while any unfunded commitment is recorded with Accrued interest and other liabilities. These investments are accounted for under the proportional amortization method. Under the proportional amortization method, the initial cost of the investment is amortized in proportion to the tax credits and other benefits received and recognized as a component of Income tax expense in the Consolidated Statements of Income.
Investments in Historic Tax Credits [Policy Text Block]	Investments in historic tax credits. First Financial has noncontrolling financial investments in private investment funds and partnerships that finance the rehabilitation and re-use of historic buildings. These unconsolidated investments may generate a return through the realization of federal and state income tax credits, as well as other tax benefits, such as tax deductions from net operating losses of the investments over a period of time. Investments in historic tax credits are accounted for under the equity method of accounting and the Company’s recorded investment in these entities is carried in Accrued interest and other assets on the Consolidated Balance Sheets with any unfunded commitment recorded in Accrued interest and other liabilities. Impairment of these investments is recorded in Other noninterest expense, while the tax credits and other net tax benefits received are recognized as a component of income tax expense in the Consolidated Statements of Income.
Renewable Energy Tax Credits Policy text block	Investments in renewable energy credits. First Financial has investments in renewable energy projects where it has noncontrolling interest which is not consolidated. This investment may generate a return through the realization of federal and state income tax credits, as well as other tax benefits, such as tax deductions from net operating losses of the investments over a period of time. Investments in renewable energy tax credits are accounted for under the equity method of accounting and are included in Accrued interest and other assets on the Consolidated Balance Sheets with any unfunded commitment recorded in Accrued interest and other liabilities. Impairment of these investments is recorded in Other noninterest expense, while the tax credits and other net tax benefits received are recognized as a component of income tax expense in the Consolidated Statements of Income.
Income Tax, Policy	Income taxes. First Financial and its subsidiaries file a consolidated federal income tax return. Each subsidiary provides for income taxes on a separate return basis, and remits to First Financial amounts determined to be currently payable. First Financial evaluates and assesses the relative risks and appropriate tax treatment of transactions after considering statutes, regulations, judicial precedent and other information, and maintains tax accruals consistent with its evaluation of these relative risks. Changes to the estimate of accrued taxes occur periodically due to changes in tax rates, interpretations of tax laws, the status of examinations being conducted by taxing authorities and changes to statutory, judicial and regulatory guidance that impact the relative risks of tax positions. These changes, when they occur, can affect deferred taxes and accrued taxes as well as the current period’s income tax expense and can be material to the Company's operating results. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Interest and penalties on income tax assessments or income tax refunds are recorded in Other noninterest expense in the Consolidated Statements of Income. In establishing a provision for income tax expense, we must make judgments and interpretations about the application of complex tax laws as well as make estimates about when in the future certain items will affect taxable income. First Financial regularly reviews its tax positions and establishes reserves for income tax-related uncertainties based on estimates of whether it is more likely than not that the tax uncertainty would be sustained upon challenge by the appropriate tax authorities which would then result in additional taxes, penalties and interest due. Reserves for uncertain tax positions, if any, are included in income tax expense in the Consolidated Financial Statements.
Pension and Other Postretirement Plans, Pensions, Policy	Pension. First Financial sponsors a non-contributory defined-benefit pension plan covering substantially all employees. Accounting for the pension plan involves material estimates regarding future plan obligations and investment returns on plan assets. Significant assumptions used in the pension plan include the discount rate, expected return on plan assets and the rate of compensation increase. First Financial determines the discount rate assumption using published corporate bond indices and the projected cash flows of the pension plan. First Financial also utilizes external surveys for industry comparisons to assess the discount rate for reasonableness. The expected long-term return on plan assets is determined based on the composition of plan assets, actual returns and economic forecasts, while the rate of compensation increase is compared to historical increases for plan participants. Changes in these assumptions can have a material impact on the amount of First Financial’s future pension obligations, on the funded status of the plan and on the Company's operating results
Derivatives, Policy	Derivative instruments. First Financial accounts for its derivative financial instruments in accordance with FASB ASC Topic 815, Derivatives and Hedging. FASB ASC Topic 815 requires all derivative instruments to be carried at fair value on the balance sheet. The accounting for changes in the fair value of derivatives is based on the intended use of the derivative and the resulting designation. Derivatives used to hedge the exposure to changes in the fair value of an asset, liability or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives used to hedge the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Client derivatives - First Financial utilizes matched interest rate swaps as a means to offer commercial borrowers fixed rate funding while providing the Company with floating rate assets. Upon entering into an interest rate swap with a borrower, the Bank simultaneously enters into an offsetting swap agreement with an institutional counterparty, with substantially matching terms. These matched interest rate swap agreements generally involve the receipt by First Financial of floating rate amounts from the counterparties in exchange for payments to these counterparties by First Financial of fixed rate amounts received from commercial borrowers over the life of the agreements. First Financial's matched interest rate swaps qualify as derivatives, but are not designated as hedging instruments. The net interest receivable or payable on matched interest rate swaps is accrued and recognized as an adjustment to interest income. The fair values of client derivatives are included within Accrued interest and other assets and Accrued interest and other liabilities in the Consolidated Balance Sheets. Foreign exchange contracts - First Financial may enter into foreign exchange derivative contracts for the benefit of commercial customers to hedge their exposure to foreign currency fluctuations. Similar to the hedging of interest rate risk from interest rate derivative contracts, First Financial also enters into foreign exchange contracts with major financial institutions to economically hedge a substantial portion of the exposure from client driven foreign exchange activity. These derivatives are classified as free-standing instruments with the revaluation gain or loss recorded in Foreign exchange income in the Consolidated Statements of Income. Credit derivatives - In conjunction with participating interests in commercial loans, First Financial periodically enters into risk participation agreements with counterparties whereby First Financial assumes a portion of the credit exposure associated with an interest rate swap on the participated loan in exchange for a fee. Under these agreements, First Financial will make payments to the counterparty if the loan customer defaults on its obligation to perform under the interest rate swap contract with the counterparty. The fair value of these agreements is recorded in the Consolidated Balance Sheets in Accrued interest and other liabilities. Mortgage derivatives - First Financial enters into IRLCs and forward commitments for the future delivery of mortgage loans to third party investors, which are considered derivatives. When borrowers secure an IRLC with First Financial and the loan is intended to be sold, First Financial will enter into forward commitments for the future delivery of the loans to third party investors in order to hedge against the effect of changes in interest rates impacting IRLCs and Loans held for sale. The fair value of these agreements is recorded in the Consolidated Balance Sheets in Accrued interest and other assets.
Share-based Compensation, Option and Incentive Plans Policy	Stock-based compensation. First Financial grants stock-based awards, including restricted stock awards and options to purchase the Company’s common stock. Restricted stock award grants are for a fixed number of shares to employees and directors with an exercise price equal to the fair value of the shares at the date of grant. Stock-based compensation expense is recognized in the Consolidated Statements of Income on a straight-line basis over the vesting period. As compensation expense is recognized, a deferred tax asset is recorded that represents an estimate of the future tax deduction from exercise. At the time stock-based awards are exercised, canceled or expire, First Financial may be required to recognize an adjustment to tax expense.
Earnings Per Share, Policy	Earnings per share. Basic earnings per common share is computed by dividing net income available to common shareholders by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per common share is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding, unvested shares and dilutive common stock equivalents outstanding during the period. Common stock equivalents, which consist of common stock issuable under the assumed exercise of stock options granted under First Financial's stock-based compensation plans and the assumed conversion of common stock warrants, are calculated using the treasury stock method.
Segment Reporting, Policy	Segments and related information. While the Company monitors the operating results of its six lines of business, operations are managed and financial performance is evaluated on a consolidated basis. Accordingly, and consistent with prior years, all of the Company's operations are considered by management to be aggregated in one reportable operating segment.
Off-Balance-Sheet Credit Exposure, Policy	Letters of credit are conditional commitments issued by First Financial to guarantee the performance of a client to a third party.  First Financial’s letters of credit consist of performance assurances made on behalf of clients who have a contractual commitment to produce or deliver goods or services.  The risk to First Financial arises from its obligation to make payment in the event of the client's contractual default to produce the contracted good or service to a third party.
Loans and Leases Receivable, Past Due Status, Policy [Policy Text Block]	Delinquency. Loans are considered past due or delinquent when the contractual principal or interest due in accordance with the terms of the loan agreement or any portion thereof remains unpaid after the due date of the scheduled payment.
Loans and Leases Receivable, Nonaccrual Loan and Lease Status, Policy	Nonaccrual. Loans are classified as nonaccrual when, in the opinion of management, collection of principal or interest is doubtful or when principal or interest payments are 90 days or more past due. Generally, loans are classified as nonaccrual due to the continued failure to adhere to contractual payment terms by the borrower, coupled with other pertinent factors. When a loan is classified as nonaccrual, the accrual of interest income is discontinued and previously accrued but unpaid interest is reversed. Any payments received while a loan is on nonaccrual status are applied as a reduction to the carrying value of the loan. A loan classified as nonaccrual may return to accrual status if none of the principal and interest is due and unpaid, and the Bank expects repayment of the remaining contractual principal and interest.
Troubled Debt Restructuring [Policy Text Block]	Troubled debt restructurings. A loan modification is considered a TDR when the borrower is experiencing financial difficulty and concessions are made by the Company that would not otherwise be considered for a borrower with similar credit characteristics. The most common types of modifications include interest rate reductions, bankruptcies, maturity extensions and modifications to principal amortization, including interest-only structures. Modified terms are dependent upon the financial position and needs of the individual borrower. If the modification agreement is violated, the loan is managed by the Company’s credit administration group for resolution, which may result in foreclosure in the case of real estate.
Impaired Financing Receivable, Policy	Loans classified as nonaccrual and loans modified as TDRs are considered nonperforming.
Loans and Leases Receivable, Real Estate Acquired Through Foreclosure, Policy	OREO is comprised of properties acquired by the Company primarily through the loan foreclosure or repossession process, that result in partial or total satisfaction of problem loans.
Fair Value of Financial Instruments, Policy	The following methods, assumptions and valuation techniques were used by First Financial to measure different financial assets and liabilities at fair value on a recurring or nonrecurring basis. Investment securities. Investment securities classified as available-for-sale are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted market prices, when available (Level 1). If quoted market prices are not available, fair values are measured utilizing independent valuation techniques of identical or similar investment securities. First Financial compiles prices from various sources who may apply such techniques as matrix pricing to determine the value of identical or similar investment securities (Level 2). Matrix pricing is a mathematical technique widely used in the banking industry to value investment securities without relying exclusively on quoted prices for the specific investment securities but rather relying on the investment securities’ relationship to other benchmark quoted investment securities. Any investment securities not valued based upon the methods previously described are considered Level 3. First Financial utilizes values provided by third-party pricing vendors to price the investment securities portfolio in accordance with the fair value hierarchy of the Fair Value Topic and reviews the pricing methodologies utilized by the pricing vendors to ensure that the fair value determination is consistent with the applicable accounting guidance. First Financial’s pricing process includes a series of quality assurance activities where prices are compared to recent market conditions, historical prices and other independent pricing services. Further, the Company periodically validates the fair value of a sample of securities in the portfolio by comparing the fair values to prices from other independent sources for the same or similar securities. First Financial analyzes unusual or significant variances, conducts additional research with the pricing vendor, and if necessary, takes appropriate action based on its findings. The results of the quality assurance process are incorporated into the selection of pricing providers by the portfolio manager. Loans held for sale. The fair value of the Company’s residential mortgage loans held for sale is determined on a recurring basis based on quoted prices for similar loans in active markets, and therefore, is classified as Level 2 in the fair value hierarchy. Derivatives. The fair values of derivative instruments are based primarily on a net present value calculation of the cash flows related to the interest rate swaps and foreign exchange contracts at the reporting date, using primarily observable market inputs such as interest rate yield curves and currency exchange rates, which represents the cost to terminate the swap if First Financial should choose to do so. Additionally, First Financial utilizes an internally-developed model to value the credit risk component of derivative assets and liabilities, which is recorded as an adjustment to the fair value of the derivative asset or liability on the reporting date. Derivative instruments are classified as Level 2 in the fair value hierarchy. Collateral dependent loans. Collateral dependent loans carried at fair value have been partially charged-off or receive specific allocations of the allowance for credit losses. For collateral dependent loans, fair value is generally based on real estate appraisals, a calculation of enterprise value or a valuation of business assets including equipment, inventory and accounts receivable. These loans had a principal amount of $11.9 million and $28.8 million at December 31, 2022 and December 31, 2021, respectively, with a valuation allowance of $3.7 million and $9.7 million at December 31, 2022 and December 31, 2021, respectively. The value of real estate collateral is determined utilizing an income or market valuation approach based on an appraisal conducted by an independent, licensed third-party appraiser (Level 3). These appraisals may utilize a single valuation approach or a combination of approaches including the comparable sales approach and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Collateral is then adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation, and management’s expertise and knowledge of the client and the client’s business, resulting in a Level 3 fair value classification. Collateral dependent loans are evaluated on a quarterly basis for additional write-downs and are adjusted accordingly. Enterprise value is defined as imputed value for the entire underlying business. To determine an appropriate range of enterprise value, FFB relies on a standardized set of valuation methodologies that take into account future projected cash flows, market based multiples as well as asset values. Valuations involve both quantitative and qualitative considerations and professional judgments concerning differences in financial and operating characteristics in addition to other factors that may impact values over time (Level 3). The value of business equipment is based on an outside appraisal, if deemed significant, or the net book value on the applicable borrower financial statements. Likewise, values for inventory and accounts receivable collateral are based on borrower financial statement balances or aging reports on a discounted basis as appropriate (Level 3). The fair value of collateral dependent loans is measured at fair value on a nonrecurring basis. Any fair value adjustments are recorded in the period incurred as provision for credit losses on the Consolidated Statements of Income. OREO. Assets acquired through loan foreclosure are recorded at fair value less costs to sell, with any difference between the fair value of the property and the carrying value of the loan recorded as a charge-off establishing a new cost basis. Subsequent changes in value are reported as adjustments to the carrying amount and are recorded in noninterest expense. The carrying value of OREO is not re-measured to fair value on a recurring basis, but is subject to fair value adjustments when the carrying value differs from the fair value, less estimated selling costs. Fair value is based on recent real estate appraisals and is updated at least annually. The Company classifies OREO in level 3 of the fair value hierarchy.
Other Contract-Mortgage
Derivatives, Methods of Accounting, Hedging Derivatives	First Financial enters into IRLCs and forward commitments for the future delivery of mortgage loans to third party investors, which are considered derivatives. When borrowers secure an IRLC with First Financial and the loans are intended to be sold, First Financial will enter into forward commitments for the future delivery of the loans to third party investors in order to hedge against the effect of changes in interest rates impacting IRLCs and and loans held for sale.
Credit Risk
Derivatives, Methods of Accounting, Hedging Derivatives	First Financial manages this market value credit risk through counterparty credit policies including a review of total derivative notional position to total assets, total credit exposure to total capital and counterparty credit exposure risk
Fair Value Hedges
Derivatives, Methods of Accounting, Hedging Derivatives	First Financial utilizes interest rate swaps as a means to offer commercial borrowers fixed rate funding while providing the Company with floating rate assets.

INVESTMENTS (Tables)

INVESTMENTS (Tables)	12 Months Ended
	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Summary of Held-To-Maturity and Available-For-Sale Investment Securities	The following is a summary of HTM and AFS investment securities as of December 31, 2022: Held-to-maturity Available-for-sale (Dollars in thousands) Amortized Unrecognized Unrecognized Fair Amortized Unrealized Unrealized Fair U.S. Treasuries $ 0 $ 0 $ 0 $ 0 $ 37,312 $ 0 $ (4,616) $ 32,696 Securities of U.S. government agencies and corporations 0 0 0 0 80,382 0 (13,914) 66,468 Mortgage-backed securities - residential 0 0 0 0 747,478 47 (97,462) 650,063 Mortgage-backed securities - commercial 35,363 0 (4,114) 31,249 676,934 2 (47,374) 629,562 Collateralized mortgage obligations 9,280 0 (827) 8,453 538,970 181 (61,439) 477,712 Obligations of state and other political subdivisions 8,128 105 (201) 8,032 832,066 565 (124,168) 708,463 Asset-backed securities 0 0 0 0 772,261 39 (60,975) 711,325 Other securities 31,250 0 (2,499) 28,751 142,015 0 (8,656) 133,359 Total $ 84,021 $ 105 $ (7,641) $ 76,485 $ 3,827,418 $ 834 $ (418,604) $ 3,409,648 The following is a summary of HTM and AFS investment securities as of December 31, 2021: Held-to-maturity Available-for-sale (Dollars in thousands) Amortized Unrecognized Unrecognized Fair Amortized Unrealized Unrealized Fair U.S. Treasuries $ 0 $ 0 $ 0 $ 0 $ 34,961 $ 4 $ (189) $ 34,776 Securities of U.S. government agencies and corporations 0 0 0 0 78,998 248 (129) 79,117 Mortgage-backed securities - residential 0 0 0 0 728,050 6,635 (10,548) 724,137 Mortgage-backed securities - commercial 46,362 651 0 47,013 729,948 4,294 (2,352) 731,890 Collateralized mortgage obligations 11,882 221 0 12,103 696,258 7,979 (6,497) 697,740 Obligations of state and other political subdivisions 8,926 915 0 9,841 1,058,735 35,591 (8,594) 1,085,732 Asset-backed securities 0 0 0 0 720,638 1,521 (2,578) 719,581 Other securities 31,250 176 (485) 30,941 133,001 2,114 (242) 134,873 Total $ 98,420 $ 1,963 $ (485) $ 99,898 $ 4,180,589 $ 58,386 $ (31,129) $ 4,207,846
Summary of Investment Securities by Estimated Maturity	The following table provides a summary of investment securities by contractual maturity as of December 31, 2022, except for residential and commercial mortgage-backed securities, collateralized mortgage obligations and asset-backed securities, which are shown as single totals, due to the unpredictability of the timing in principal repayments: Held-to-maturity Available-for-sale (Dollars in thousands) Amortized Fair Amortized Fair Due in one year or less $ 0 $ 0 $ 8,230 $ 8,125 Due after one year through five years 2,584 2,662 93,629 89,551 Due after five years through ten years 34,920 32,410 292,581 255,143 Due after ten years 1,874 1,711 697,335 588,167 Mortgage-backed securities - residential 0 0 747,478 650,063 Mortgage-backed securities - commercial 35,363 31,249 676,934 629,562 Collateralized mortgage obligations 9,280 8,453 538,970 477,712 Asset-backed securities 0 0 772,261 711,325 Total $ 84,021 $ 76,485 $ 3,827,418 $ 3,409,648
Age of Gross Unrealized Losses and Associated Fair Value by Investment Category	The following tables provide the fair value and gross unrealized losses on investment securities in an unrealized loss position for which an allowance for credit losses was not recorded, aggregated by investment category and the length of time the individual securities have been in a continuous loss position: December 31, 2022 Less than 12 months 12 months or more Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasuries $ 2,383 $ (46) $ 30,313 $ (4,570) $ 32,696 $ (4,616) Securities of U.S. government agencies and corporations 0 0 66,468 (13,914) 66,468 (13,914) Mortgage-backed securities - residential 195,972 (10,413) 443,415 (87,049) 639,387 (97,462) Mortgage-backed securities - commercial 457,863 (21,020) 189,123 (30,468) 646,986 (51,488) Collateralized mortgage obligations 205,456 (13,059) 271,377 (49,207) 476,833 (62,266) Obligations of state and other political subdivisions 301,073 (31,397) 368,673 (92,972) 669,746 (124,369) Asset-backed securities 250,946 (9,410) 422,090 (51,565) 673,036 (60,975) Other securities 125,344 (7,283) 31,629 (3,872) 156,973 (11,155) Total $ 1,539,037 $ (92,628) $ 1,823,088 $ (333,617) $ 3,362,125 $ (426,245) December 31, 2021 Less than 12 months 12 months or more Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasuries $ 24,755 $ (190) $ 0 $ 0 $ 24,755 $ (190) Securities of U.S. Government agencies and corporations 17,382 (128) 0 0 17,382 (128) Mortgage-backed securities - residential 459,098 (8,375) 78,090 (2,173) 537,188 (10,548) Mortgage-backed securities - commercial 205,520 (2,149) 13,818 (203) 219,338 (2,352) Collateralized mortgage obligations 369,318 (6,110) 12,485 (387) 381,803 (6,497) Obligations of state and other political subdivisions 380,735 (7,543) 55,568 (1,051) 436,303 (8,594) Asset-backed securities 482,118 (2,578) 0 0 482,118 (2,578) Other securities 31,896 (354) 11,877 (373) 43,773 (727) Total $ 1,970,822 $ (27,427) $ 171,838 $ (4,187) $ 2,142,660 $ (31,614)

LOANS (Tables)

LOANS (Tables)	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2022
LOANS - Carrying Amount of Accretable Yield for Purchased Impaired and Nonimpaired Loans [Abstract]
Commercial and Consumer Credit Exposure by Risk Attribute		The following table sets forth the Company's loan portfolio at December 31, 2022 by risk attribute and origination date: (Dollars in thousands) 2022 2021 2020 2019 2018 Prior Term Total Revolving Total Commercial & industrial Pass $ 879,836 $ 561,890 $ 348,123 $ 209,758 $ 112,282 $ 206,656 $ 2,318,545 $ 971,080 $ 3,289,625 Special mention 2,740 13,821 4,125 14,047 8,523 5,544 48,800 18,055 66,855 Substandard 2,335 5,176 11,886 8,016 3,331 13,812 44,556 9,236 53,792 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 884,911 $ 580,887 $ 364,134 $ 231,821 $ 124,136 $ 226,012 $ 2,411,901 $ 998,371 $ 3,410,272 Lease financing Pass $ 167,035 $ 25,638 $ 13,705 $ 12,797 $ 9,402 $ 2,930 $ 231,507 $ 0 $ 231,507 Special mention 0 0 70 0 0 0 70 0 70 Substandard 4,363 0 0 164 11 9 4,547 0 4,547 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 171,398 $ 25,638 $ 13,775 $ 12,961 $ 9,413 $ 2,939 $ 236,124 $ 0 $ 236,124 Construction real estate Pass $ 89,116 $ 276,639 $ 96,823 $ 4,902 $ 390 $ 353 $ 468,223 $ 23,266 $ 491,489 Special mention 0 14,395 0 0 6,166 0 20,561 0 20,561 Substandard 0 0 0 0 0 0 0 0 0 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 89,116 $ 291,034 $ 96,823 $ 4,902 $ 6,556 $ 353 $ 488,784 $ 23,266 $ 512,050 Commercial real estate - investor Pass $ 643,174 $ 470,085 $ 301,510 $ 719,699 $ 300,772 $ 508,639 $ 2,943,879 $ 26,153 $ 2,970,032 Special mention 0 13,090 23,111 9,297 26,079 13,804 85,381 861 86,242 Substandard 0 6,950 6 4,025 17,178 9,631 37,790 0 37,790 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 643,174 $ 490,125 $ 324,627 $ 733,021 $ 344,029 $ 532,074 $ 3,067,050 $ 27,014 $ 3,094,064 Commercial real estate - owner Pass $ 165,411 $ 155,041 $ 170,587 $ 101,137 $ 112,063 $ 211,377 $ 915,616 $ 11,125 $ 926,741 Special mention 0 0 0 1,479 0 14,040 15,519 0 15,519 Substandard 0 525 844 5,114 3,501 6,451 16,435 0 16,435 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 165,411 $ 155,566 $ 171,431 $ 107,730 $ 115,564 $ 231,868 $ 947,570 $ 11,125 $ 958,695 Residential real estate Performing $ 320,676 $ 274,816 $ 205,948 $ 110,745 $ 51,583 $ 114,642 $ 1,078,410 $ 0 $ 1,078,410 Nonperforming 414 1,615 1,286 2,554 1,755 6,231 13,855 0 13,855 Total $ 321,090 $ 276,431 $ 207,234 $ 113,299 $ 53,338 $ 120,873 $ 1,092,265 $ 0 $ 1,092,265 Home equity Performing $ 26,411 $ 33,414 $ 38,226 $ 11,733 $ 8,051 $ 24,985 $ 142,820 $ 585,712 $ 728,532 Nonperforming 5 136 298 78 104 430 1,051 4,208 5,259 Total $ 26,416 $ 33,550 $ 38,524 $ 11,811 $ 8,155 $ 25,415 $ 143,871 $ 589,920 $ 733,791 Installment Performing $ 100,256 $ 38,694 $ 7,244 $ 3,915 $ 2,861 $ 3,242 $ 156,212 $ 51,854 $ 208,066 Nonperforming 650 794 18 6 20 42 1,530 299 1,829 Total $ 100,906 $ 39,488 $ 7,262 $ 3,921 $ 2,881 $ 3,284 $ 157,742 $ 52,153 $ 209,895 Credit cards Performing $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 51,287 $ 51,287 Nonperforming 0 0 0 0 0 0 0 528 528 Total $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 51,815 $ 51,815 Grand Total $ 2,402,422 $ 1,892,719 $ 1,223,810 $ 1,219,466 $ 664,072 $ 1,142,818 $ 8,545,307 $ 1,753,664 $ 10,298,971 The following table sets forth the Company's loan portfolio at December 31, 2021 by risk attribute and origination date: (Dollars in thousands) 2021 2020 2019 2018 2017 Prior Term Total Revolving Total Commercial & industrial Pass $ 711,198 $ 442,064 $ 339,507 $ 164,273 $ 119,580 $ 154,835 $ 1,931,457 $ 700,246 $ 2,631,703 Special mention 389 4,867 5,993 16,057 6,511 4,918 38,735 21,505 60,240 Substandard 2,220 434 2,843 1,224 12,640 1,465 20,826 7,259 28,085 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 713,807 $ 447,365 $ 348,343 $ 181,554 $ 138,731 $ 161,218 $ 1,991,018 $ 729,010 $ 2,720,028 Lease financing Pass $ 31,697 $ 21,536 $ 19,095 $ 15,494 $ 6,821 $ 4,765 $ 99,408 $ 0 $ 99,408 Special mention 0 10,216 0 0 0 0 10,216 0 10,216 Substandard 0 0 0 0 0 0 0 0 0 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 31,697 $ 31,752 $ 19,095 $ 15,494 $ 6,821 $ 4,765 $ 109,624 $ 0 $ 109,624 Construction real estate Pass $ 95,991 $ 200,421 $ 96,726 $ 15,886 $ 317 $ 12,719 $ 422,060 $ 18,299 $ 440,359 Special mention 0 6,531 0 9,004 0 0 15,535 0 15,535 Substandard 0 0 0 0 0 0 0 0 0 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 95,991 $ 206,952 $ 96,726 $ 24,890 $ 317 $ 12,719 $ 437,595 $ 18,299 $ 455,894 Commercial real estate - investor Pass $ 537,183 $ 379,217 $ 944,915 $ 367,946 $ 294,147 $ 434,641 $ 2,958,049 $ 66,579 $ 3,024,628 Special mention 0 7,479 18,136 18,006 15,566 34,153 93,340 0 93,340 Substandard 1,616 6 21,312 6,628 6,918 307 36,787 0 36,787 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 538,799 $ 386,702 $ 984,363 $ 392,580 $ 316,631 $ 469,101 $ 3,088,176 $ 66,579 $ 3,154,755 Commercial real estate - owner Pass $ 204,291 $ 184,564 $ 121,150 $ 135,463 $ 119,489 $ 259,504 $ 1,024,461 $ 7,565 $ 1,032,026 Special mention 970 2,283 2,262 3,751 1,381 5,512 16,159 0 16,159 Substandard 162 727 6,541 12,513 1,730 1,963 23,636 38 23,674 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 205,423 $ 187,574 $ 129,953 $ 151,727 $ 122,600 $ 266,979 $ 1,064,256 $ 7,603 $ 1,071,859 Residential real estate Performing $ 258,537 $ 230,699 $ 138,239 $ 64,310 $ 34,606 $ 162,924 $ 889,315 $ 0 $ 889,315 Nonperforming 236 970 1,193 598 339 3,418 6,754 0 6,754 Total $ 258,773 $ 231,669 $ 139,432 $ 64,908 $ 34,945 $ 166,342 $ 896,069 $ 0 $ 896,069 Home equity Performing $ 42,298 $ 45,638 $ 14,713 $ 11,221 $ 7,603 $ 30,588 $ 152,061 $ 553,245 $ 705,306 Nonperforming 72 161 44 67 56 234 634 2,459 3,093 Total $ 42,370 $ 45,799 $ 14,757 $ 11,288 $ 7,659 $ 30,822 $ 152,695 $ 555,704 $ 708,399 Installment Performing $ 58,209 $ 12,768 $ 8,213 $ 5,541 $ 3,925 $ 2,201 $ 90,857 $ 28,353 $ 119,210 Nonperforming 6 61 32 9 1 56 165 79 244 Total $ 58,215 $ 12,829 $ 8,245 $ 5,550 $ 3,926 $ 2,257 $ 91,022 $ 28,432 $ 119,454 Credit cards Performing $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 51,772 $ 51,772 Nonperforming 0 0 0 0 0 0 0 445 445 Total $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 52,217 $ 52,217 Grand Total $ 1,945,075 $ 1,550,642 $ 1,740,914 $ 847,991 $ 631,630 $ 1,114,203 $ 7,830,455 $ 1,457,844 $ 9,288,299
Loan Delinquency, including Nonaccrual Loans		Loan delinquency, including nonaccrual loans, was as follows: As of December 31, 2022 (Dollars in thousands) 30 – 59 60 – 89 > 90 days Total Current Total > 90 days Loans Commercial & industrial $ 5,375 $ 72 $ 501 $ 5,948 $ 3,404,324 $ 3,410,272 $ 0 Lease financing 5,212 1,052 843 7,107 229,017 236,124 742 Construction real estate 0 0 0 0 512,050 512,050 0 Commercial real estate-investor 0 0 0 0 3,094,064 3,094,064 0 Commercial real estate-owner 26 5,216 44 5,286 953,409 958,695 0 Residential real estate 4,254 2,074 3,260 9,588 1,082,677 1,092,265 0 Home equity 1,725 729 1,209 3,663 730,128 733,791 0 Installment 874 490 414 1,778 208,117 209,895 0 Credit card 261 150 116 527 51,288 51,815 115 Total $ 17,727 $ 9,783 $ 6,387 $ 33,897 $ 10,265,074 $ 10,298,971 $ 857 As of December 31, 2021 (Dollars in thousands) 30 - 59 60 - 89 > 90 days Total Current Total > 90 days Loans Commercial & industrial $ 303 $ 2,006 $ 2,775 $ 5,084 $ 2,714,944 $ 2,720,028 $ 0 Lease financing 93 0 0 93 109,531 109,624 0 Construction real estate 0 0 0 0 455,894 455,894 0 Commercial real estate-investor 89 42 6,409 6,540 3,148,215 3,154,755 0 Commercial real estate-owner 56 2,207 637 2,900 1,068,959 1,071,859 0 Residential real estate 4,379 262 2,114 6,755 889,314 896,069 0 Home equity 1,214 692 1,186 3,092 705,307 708,399 0 Installment 162 37 45 244 119,210 119,454 0 Credit card 223 134 137 494 51,723 52,217 137 Total $ 6,519 $ 5,380 $ 13,303 $ 25,202 $ 9,263,097 $ 9,288,299 $ 137
Loans Restructured During Period		The following table provides information on loan modifications classified as TDRs during the years ended December 31, 2022, 2021 and 2020: Years ended December 31, 2022 2021 2020 (Dollars in thousands) Number of loans Pre-modification loan balance Period end balance Number of loans Pre-modification loan balance Period end balance Number of loans Pre-modification loan balance Period end balance Commercial & industrial 6 $ 10,049 $ 8,825 7 $ 9,311 $ 8,039 8 $ 14,984 $ 14,984 Construction 0 0 0 0 0 0 0 0 0 Commercial 2 6,337 3,115 8 16,850 9,807 0 0 0 Residential 15 1,376 1,317 17 1,585 1,553 24 1,953 1,847 Home equity 1 32 32 2 30 30 11 351 349 Installment 1 1 1 1 0 0 2 35 22 Total 25 $ 17,795 $ 13,290 35 $ 27,776 $ 19,429 45 $ 17,323 $ 17,202
Loans Restructured, Modifications		The following table provides information on how TDRs were modified during the years ended December 31, 2022, 2021 and 2020: Years Ended December 31, (Dollars in thousands) 2022 2021 2020 Extended maturities $ 3,346 $ 0 $ 0 Adjusted interest rates 3,106 0 0 Combination of rate and maturity changes 0 0 0 Forbearance 4,477 7,328 4,759 Bankruptcies 90 6,723 678 Other (1) 2,271 5,378 11,765 Total $ 13,290 $ 19,429 $ 17,202 (1) Other includes covenant modifications and other concessions or combination of concessions that do not consist of interest rate adjustments, forbearance, bankruptcy and maturity extensions.
Loan Restructuring, Loans with a Payment Default Within 12 Months of Loan Modification
Nonaccrual, Restructured and Impaired Loans		The following table provides information on nonperforming loans as of December 31: 2022 2021 2020 (Dollars in thousands) Nonaccrual loans with a related ACL Nonaccrual loans with no related ACL Total nonaccrual Nonaccrual loans with a related ACL Nonaccrual loans with no related ACL Total nonaccrual Nonaccrual loans with a related ACL Nonaccrual loans with no related ACL Total nonaccrual Nonaccrual loans (1) Commercial & industrial $ 6,692 $ 1,550 $ 8,242 $ 11,077 $ 6,285 $ 17,362 $ 18,711 $ 10,519 $ 29,230 Lease financing 0 178 178 0 203 203 0 0 0 Construction real estate 0 0 0 0 0 0 0 0 0 Commercial real estate 5,216 570 5,786 17,716 1,796 19,512 6,957 27,725 34,682 Residential real estate 0 10,691 10,691 0 8,305 8,305 251 11,350 11,601 Home equity 0 3,123 3,123 0 2,922 2,922 0 5,076 5,076 Installment 0 603 603 0 88 88 0 163 163 Total nonaccrual loans $ 11,908 $ 16,715 $ 28,623 $ 28,793 $ 19,599 $ 48,392 $ 25,919 $ 54,833 $ 80,752 Interest income effect 2022 2021 2020 Gross amount of interest that would have been recorded under original terms $ 3,247 $ 5,132 $ 5,892 Interest included in income Nonaccrual loans 1,134 1,618 1,636 Troubled debt restructurings 424 314 426 Total interest included in income 1,558 1,932 2,062 Net impact on interest income $ 1,689 $ 3,200 $ 3,830 Commitments outstanding to borrowers with nonaccrual loans $ 0 $ 0 $ 0 (1) Nonaccrual loans include nonaccrual TDRs of $10.0 million, $16.0 million and $14.7 million as of December 31, 2022, 2021 and 2020, respectively.
Schedule of Collateral Dependent Loans		The following table presents the amortized cost basis of collateral dependent loans by class of loan. December 31, 2022 Type of Collateral (Dollar in thousands) Business assets Commercial real estate Equipment Land Residential real estate Other Total Class of loan Commercial & industrial $ 8,205 $ 0 $ 0 $ 0 $ 0 $ 37 $ 8,242 Lease financing 0 0 178 0 0 0 178 Commercial real estate-investor 0 353 0 0 22 0 375 Commercial real estate-owner 0 3,399 1,893 119 0 0 5,411 Residential real estate 0 0 0 0 10,691 0 10,691 Home equity 0 0 0 0 3,123 0 3,123 Installment 0 0 0 0 0 603 603 Total $ 8,205 8205000 $ 3,752 $ 2,071 $ 119 $ 13,836 $ 640 $ 28,623 December 31, 2021 Type of Collateral (Dollar in thousands) Business assets Commercial real estate Equipment Land Residential real estate Other Total Class of loan Commercial & industrial $ 13,171 $ 15 $ 833 $ 0 $ 0 $ 3,343 $ 17,362 Lease financing 0 0 203 0 0 0 203 Commercial real estate-investor 0 6,362 0 0 422 0 6,784 Commercial real estate-owner 0 6,673 5,937 38 80 0 12,728 Residential real estate 0 0 0 0 8,305 0 8,305 Home equity 0 0 0 0 2,922 0 2,922 Installment 0 0 0 0 0 88 88 Total $ 13,171 $ 13,050 $ 6,973 $ 38 $ 11,729 $ 3,431 $ 48,392
Components of lease investments		The components of the Company's net investments in direct financing and sales-type leases, which are included in Lease financing on the Consolidated Balance Sheets are as follows: (Dollar in thousands) December 31, 2022 December 31, 2021 Direct financing leases Lease receivables $ 35,081 $ 49,843 Unguaranteed residual values 16,058 19,714 Sales-type leases Lease receivables 184,985 40,067 Unguaranteed residual values 0 0 Total net investment in direct financing and sales-type leases $ 236,124 $ 109,624
Sales-type and Direct Financing Leases, Lease Receivable, Maturity		The remaining maturities of lease receivables were as follows: (Dollars in thousands) Direct financing and Sales-type 2023 $ 56,640 2024 46,366 2025 39,495 2026 37,877 2027 31,826 Thereafter 37,512 Total lease payments 249,716 Less: unearned interest income (29,650) Net lease receivables $ 220,066
Changes in Other Real Estate Owned		Changes in OREO were as follows: Years ended December 31, (Dollars in thousands) 2022 2021 2020 Balance at beginning of year $ 98 $ 1,287 $ 2,033 Additions Commercial 0 98 510 Residential 327 0 507 Total additions 327 98 1,017 Disposals Commercial (98) (947) (217) Residential (94) (331) (1,859) Total disposals (192) (1,278) (2,076) Valuation adjustments Commercial 0 (9) 448 Residential (42) 0 (135) Total valuation adjustments (42) (9) 313 Balance at end of year $ 191 $ 98 $ 1,287

ALLOWANCE FOR CREDIT LOSSES (Ta

ALLOWANCE FOR CREDIT LOSSES (Tables)	12 Months Ended
	Dec. 31, 2022
Receivables [Abstract]
Changes in the Allowance for Loan and Lease Losses for the Previous Three Years	Changes in the allowance by loan category as of December 31 were as follows: 2022 (Dollars in thousands) Commercial & industrial Lease financing Construction real estate Commercial real estate Residential real estate Home equity Installment Credit card Total Allowance for credit losses Balance at beginning of year $ 44,052 $ 1,633 $ 11,874 $ 53,420 $ 6,225 $ 9,643 $ 1,097 $ 4,048 $ 131,992 Purchase accounting ACL for PCD 0 0 0 0 0 0 0 0 0 Provision for credit losses 3,221 2,041 1,653 (12,951) 6,509 2,066 5,232 (1,040) 6,731 Gross charge-offs (5,899) (152) 0 (3,667) (224) (160) (1,549) (907) (12,558) Recoveries 939 49 0 4,304 174 898 165 283 6,812 Total net charge-offs (4,960) (103) 0 637 (50) 738 (1,384) (624) (5,746) Ending allowance for credit losses $ 42,313 $ 3,571 $ 13,527 $ 41,106 $ 12,684 $ 12,447 $ 4,945 $ 2,384 $ 132,977 2021 (Dollars in thousands) Commercial & industrial Lease financing Construction real estate Commercial real estate Residential real estate Home equity Installment Credit card Total Allowance for credit losses Beginning balance, prior to adoption of ASC 326 $ 51,454 $ 995 $ 21,736 $ 76,795 $ 8,560 $ 11,869 $ 1,215 $ 3,055 $ 175,679 Purchase accounting ACL for PCD 0 17 0 0 0 0 0 0 17 Provision for credit losses 6,606 621 (8,367) (14,689) (2,436) (2,376) 65 1,552 (19,024) Gross charge-offs (15,620) 0 (1,498) (13,471) (127) (1,073) (334) (780) (32,903) Recoveries 1,612 0 3 4,785 228 1,223 151 221 8,223 Total net charge-offs (14,008) 0 (1,495) (8,686) 101 150 (183) (559) (24,680) Ending allowance for credit losses $ 44,052 $ 1,633 $ 11,874 $ 53,420 $ 6,225 $ 9,643 $ 1,097 $ 4,048 $ 131,992 2020 (Dollars in thousands) Commercial & industrial Lease financing Construction real estate Commercial real estate Residential real estate Home equity Installment Credit card Total Allowance for credit losses Beginning balance, prior to adoption of ASC 326 $ 18,584 $ 971 $ 2,381 $ 23,579 $ 5,299 $ 4,787 $ 392 $ 1,657 $ 57,650 Impact of adopting ASC 326 9,901 118 11,579 24,118 5,490 8,430 801 1,068 61,505 Provision for credit losses 25,407 758 7,759 38,936 (2,122) (939) 12 985 70,796 Gross charge-offs (5,345) (852) 0 (12,100) (488) (1,541) (148) (885) (21,359) Recoveries 2,907 0 17 2,262 381 1,132 158 230 7,087 Total net charge-offs (2,438) (852) 17 (9,838) (107) (409) 10 (655) (14,272) Ending allowance for credit losses $ 51,454 $ 995 $ 21,736 $ 76,795 $ 8,560 $ 11,869 $ 1,215 $ 3,055 $ 175,679

PREMISES AND EQUIPMENT (Tables)

PREMISES AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Table Text Block]	Premises and equipment at December 31 were as follows: (Dollars in thousands) 2022 2021 Land and land improvements $ 49,016 $ 49,402 Buildings 157,620 155,337 Furniture and fixtures 69,855 70,847 Leasehold improvements 32,515 30,190 Construction in progress 5,644 8,145 314,650 313,921 Less: Accumulated depreciation and amortization 125,570 120,881 Total $ 189,080 $ 193,040

LEASES (Tables)

LEASES (Tables)	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Lease, Cost [Table Text Block]	The components of lease expense for the years ended December 31, 2022, 2021 and 2020 were as follows: (Dollars in thousands) December 31, 2022 December 31, 2021 December 31, 2020 Operating lease cost $ 7,626 $ 7,425 $ 7,897 Short-term lease cost 8 108 142 Variable lease cost 2,827 2,621 2,532 Total operating lease cost $ 10,461 $ 10,154 $ 10,571
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	Future minimum commitments due under these lease agreements as of December 31, 2022 are as follows: (Dollars in thousands) Operating leases 2023 $ 7,681 2024 7,321 2025 7,011 2026 6,736 2027 6,164 Thereafter 46,808 Total lease payments 81,721 Less: imputed interest (17,244) Total $ 64,477
Schedule of supplemental balance sheet information related to leases. [Table Text Block]	The weighted average lease term and discount rate for the Company's operating leases were as follows: December 31, 2022 December 31, 2021 December 31, 2020 Operating leases Weighted-average remaining lease term 13.1 years 13.9 years 15.1 years Weighted-average discount rate 3.29 % 3.25 % 3.07 %
Schedule of supplemental cash flow information related to leases [Table Text Block]	Supplemental cash information at year end related to leases was as follows: (Dollars in thousands) December 31, 2022 December 31, 2021 December 31, 2020 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 7,824 $ 6,860 $ 8,196 ROU assets obtained in exchange for lease obligations Operating leases 4,730 6,076 9,725

OPERATING LEASES (Tables)

OPERATING LEASES (Tables)	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Operating Leases Maturity (Table Text Block)	The future lease payments receivable from operating leases as of December 31, 2022 are as follows: (Dollars in thousands) Undiscounted cash flows 2023 $ 27,334 2024 21,422 2025 13,149 2026 7,122 2027 1,912 Thereafter 1,271 Total operating lease payments $ 72,210

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL (Tables)	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	Changes in the carrying amount of goodwill for the years ended December 31, 2022, 2021 and 2020 are shown below. (Dollars in thousands) 2022 2021 2020 Balance at beginning of year $ 1,000,749 $ 937,771 $ 937,771 Goodwill resulting from business combinations 758 62,978 0 Balance at end of year $ 1,001,507 $ 1,000,749 $ 937,771
Schedule of Finite-Lived Intangible Assets	The gross carrying amount and accumulated amortization of other intangible assets were as follows: (Dollars in thousands) December 31, 2022 December 31, 2021 Gross Accumulated Gross Accumulated Amortized intangible assets Core deposit intangibles $ 41,750 $ (26,488) $ 45,256 $ (26,911) Customer list 69,563 (14,457) 69,563 (8,362) Other 14,079 (7,064) 14,589 (5,237) Unamortized intangible assets Mortgage servicing rights 16,536 0 15,469 0 Total $ 141,928 $ (48,009) $ 144,877 $ (40,510)
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The estimated amortization expense of intangible assets for the next five years is as follows: (Dollars in thousands) Intangible amortization 2023 $ 10,538 2024 9,195 2025 9,147 2026 9,094 2027 9,053

DEPOSITS (Tables)

DEPOSITS (Tables)	12 Months Ended
	Dec. 31, 2022
Deposits [Abstract]
Maturities of time deposits [Table Text Block]	Scheduled maturities of all time deposits for the next five years were as follows: (Dollars in thousands) Time deposits 2023 $ 1,320,011 2024 293,775 2025 37,093 2026 37,881 2027 11,768 Thereafter 177 Total $ 1,700,705

BORROWINGS (Tables)

BORROWINGS (Tables)	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Schedule of Short-term Debt [Table Text Block]	The following is a summary of short-term borrowings for the last three years: 2022 2021 2020 (Dollars in thousands) Amount Rate Amount Rate Amount Rate At December 31, Federal funds purchased and securities sold under agreements to repurchase $ 0 0.00 % $ 51,203 0.01 % $ 166,594 0.05 % FHLB borrowings 1,130,000 4.58 % 225,000 0.18 % 0 0.00 % Other short-term borrowings 157,156 4.33 % 20,000 1.90 % 0 0.00 % Total $ 1,287,156 4.55 % $ 296,203 0.27 % $ 166,594 0.05 % Average for the year Federal funds purchased and securities sold under agreements to repurchase $ 29,526 1.42 % $ 160,967 0.07 % $ 149,036 0.26 % FHLB borrowings 672,928 2.37 % 43,371 0.20 % 441,867 1.37 % Other short-term borrowings 115,041 2.38 % 165 1.92 % 0 0.00 % Total $ 817,495 2.34 % $ 204,503 0.10 % $ 590,903 1.09 %
Summary of Long-term Debt [Table Text Block]	The following is a summary of First Financial's long-term debt: 2022 2021 (Dollars in thousands) Amount Average Rate Amount Average Rate Subordinated debt $ 313,705 5.48 % $ 313,248 4.86 % Unamortized debt issuance costs (1,998) n/a (2,384) n/a Capital lease liability 1,698 3.82 % 1,781 3.81 % Capital loan with municipality 775 0.00 % 775 0.00 % Subtotal 314,180 5.50 % 313,420 4.88 % Acquired in Summit acquisition Bank lines of credit 0 0.00 % 23,030 2.77 % Notes issued in conjunction with acquisition of property and equipment 32,492 4.44 % 73,382 4.09 % Total notes payable acquired in Summit acquisition 32,492 4.44 % 96,412 3.77 % Total long-term debt $ 346,672 5.40 % $ 409,832 4.62 %
Schedule of Maturities of Long-term Debt [Table Text Block]	As of December 31, 2022, First Financial's long-term debt matures as follows: (Dollars in thousands) Long-term debt 2023 $ 6,898 2024 12,408 2025 4,169 2026 6,201 2027 2,173 Thereafter 314,823 Total $ 346,672

DERIVATIVES (Tables)

DERIVATIVES (Tables)	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Derivative Financial Instruments and Balances	The following table details the location and amounts of client derivatives and foreign exchange contracts recognized in the Consolidated Balance Sheets: December 31, 2022 December 31, 2021 Estimated fair value Estimated fair value (Dollars in thousands) Balance Notional Gain Loss Notional Gain Loss Client derivatives-instruments associated with loans Matched interest rate swaps with borrower Accrued interest and other assets and other liabilities $ 2,206,351 $ 5,057 $ (147,759) $ 2,430,587 $ 84,694 $ (7,508) Matched interest rate swaps with counterparty Accrued interest and other liabilities 2,206,351 147,759 (5,057) 2,430,587 7,508 (84,701) Foreign exchange contracts Matched foreign exchange contracts with customers Accrued interest and other assets 7,734,395 111,078 (93,804) 6,423,085 67,988 (52,780) Matched foreign exchange contracts with counterparty Accrued interest and other liabilities 7,681,006 93,804 (111,078) 6,399,432 52,780 (67,988) Total $ 19,828,103 $ 357,698 $ (357,698) $ 17,683,691 $ 212,970 $ (212,977)
Disclosure by Type of Financial Instrument [Table Text Block]	The following table discloses the gross and net amounts of client derivatives and foreign exchange contracts recognized in the Consolidated Balance Sheets: December 31, 2022 December 31, 2021 (Dollars in thousands) Gross amounts of recognized liabilities Gross amounts offset in the Consolidated Balance Sheets Net amounts of (assets)/liabilities presented in the Consolidated Balance Sheets Gross amounts of recognized liabilities Gross amounts offset in the Consolidated Balance Sheets Net amounts of (assets)/liabilities presented in the Consolidated Balance Sheets Client derivatives Matched interest rate swaps $ 152,816 $ (314,048) $ (161,232) $ 92,209 $ (149,647) $ (57,438) Foreign exchange contracts with counterparty 204,882 (101,945) 102,937 120,768 (56,443) 64,325 Total $ 357,698 $ (415,993) $ (58,295) $ 212,977 $ (206,090) $ 6,887
Derivative Financial Instruments, Average Remaining Maturity and the Weighted-Average Interest Rates being Paid and Received	The following table details the derivative financial instruments, the average remaining maturities and the weighted-average interest rates being paid and received by First Financial at December 31, 2022: (Dollars in thousands) Notional Average Fair Client derivatives-interest rate contracts Receive fixed, matched interest rate swaps with borrower $ 2,206,351 5.3 $ (142,702) Pay fixed, matched interest rate swaps with counterparty 2,206,351 5.3 142,702 Client derivatives-foreign exchange contracts Foreign exchange contracts - pay USD 7,734,395 0.7 17,274 Foreign exchange contracts - receive USD 7,681,006 0.7 (17,274) Total client derivatives $ 19,828,103 1.7 $ 0

RELATED PARTIES TRANSACTIONS (T

RELATED PARTIES TRANSACTIONS (Tables)	12 Months Ended
	Dec. 31, 2022
Related Party Transactions [Abstract]
Schedule of Loans to Related Parties [Table Text Block]	Outstanding balance of loans to directors, executive officers, principal holders of First Financial’s common stock and certain related persons were as follows: (Dollars in thousands) 2022 Beginning balance $ 3,482 Additions 2,539 Deductions (403) Ending balance $ 5,618 Loans 90 days or more past due $ 0

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies [Table Text Block]	The following table presents by type First Financial's loan balances and contractual obligations to extend credit: December 31, 2022 December 31, 2021 (dollars in thousands) Unfunded commitment Loan balance Unfunded commitment Loan balance Commercial & industrial $ 1,833,977 $ 3,410,272 $ 1,545,995 $ 2,720,028 Lease financing 6,842 236,124 18,037 109,624 Construction real estate 689,015 512,050 484,038 455,894 Commercial real estate-investor 107,205 3,094,064 65,660 3,154,755 Commercial real estate-owner 48,208 958,695 29,824 1,071,859 Residential real estate 74,089 1,092,265 50,043 896,069 Home equity 903,459 733,791 822,343 708,399 Installment 16,073 209,895 15,985 119,454 Credit card 225,864 51,815 217,006 52,217 Total $ 3,904,732 $ 10,298,971 $ 3,248,931 $ 9,288,299
Investment Holdings, Schedule of Investments	The following table summarizes First Financial's investments in affordable housing projects and other tax credit investments. (Dollars in thousands) December 31, 2022 December 31, 2021 Investment Accounting Method Investment Unfunded commitment Investment Unfunded commitment LIHTC Proportional amortization $ 126,537 $ 70,690 $ 108,974 $ 57,341 HTC Equity 17,108 11,955 2,581 56 NMTC Equity 2,944 0 3,895 0 Renewable energy Equity 11,851 1,689 18,585 15,114 Total $ 158,440 $ 84,334 $ 134,035 $ 72,511 The following tables summarize First Financial's amortization expense and tax benefit recognized in affordable housing projects and other tax credit investments. Twelve months ended December 31, 2022 December 31, 2021 December 31, 2020 (Dollars in thousands) Amortization expense (1) Tax expense (benefit) recognized (2) Amortization expense (1) Tax expense (benefit) recognized (2) Amortization expense (1) Tax expense (benefit) recognized (2) LIHTC $ 11,929 $ (11,088) $ 8,894 $ (8,581) $ 8,076 $ (7,629) HTC 0 (319) 1,116 (263) 474 (563) NMTC 415 (210) 210 (210) 175 (175) Renewable energy 23,411 (25,473) 11,467 (12,216) 4,756 (4,777) Total $ 35,755 $ (37,090) $ 21,687 $ (21,270) $ 13,481 $ (13,144) (1) The amortization expense for the LIHTC investments is included in income tax expense. The amortization expense for the HTC, NMTC, and Renewable energy tax credits is included in other noninterest expense. (2) All of the tax benefits recognized are included in Income tax expense. The tax benefit recognized for the HTC, NMTC, and Renewable energy investments primarily reflects the tax credits generated from the investments and excludes the net tax expense (benefit) and deferred tax liability of the investments’ income (loss).

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Income tax expense consisted of the following components: (Dollars in thousands) 2022 2021 2020 Current expense Federal $ 24,307 $ 21,397 $ 34,632 State 3,308 2,289 2,349 Total current expense 27,615 23,686 36,981 Deferred expense (benefit) Federal (4,399) 10,944 (8,624) State 894 1,143 244 Total deferred expense (benefit) (3,505) 12,087 (8,380) Income tax expense $ 24,110 $ 35,773 $ 28,601
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	The difference between the federal income tax rates applied to income before income taxes and the effective rates were due to the following: (Dollars in thousands) 2022 2021 2020 Income taxes computed at federal statutory rate (21%) on income before income taxes $ 50,762 $ 50,596 $ 38,726 Benefit from tax-exempt income (5,743) (5,613) (5,901) Tax credits (37,331) (21,561) (13,064) Basis reduction on tax credit 2,761 1,346 657 Tax expense (benefit) of equity compensation (154) (243) 340 State income taxes, net of federal tax benefit 3,320 2,711 2,049 Affordable housing investments 9,341 7,194 6,635 Other 1,154 1,343 (841) Income tax expense $ 24,110 $ 35,773 $ 28,601
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	The major components of the temporary differences that gave rise to deferred tax assets and liabilities at December 31, 2022, and 2021, were as follows: (Dollars in thousands) 2022 2021 Deferred tax assets Allowance for credit losses $ 30,464 $ 29,754 Deferred compensation 346 292 Postretirement benefits other than pension liability 636 652 Accrued stock-based compensation 2,216 1,836 Interest on nonaccrual loans 406 442 Accrued expenses 7,454 7,286 Net unrealized losses on investment securities 92,072 0 State net operating loss 1,152 1,746 Leasing liability 15,308 15,794 Reserve for unfunded commitments 4,254 3,049 Other 516 565 Total deferred tax assets 154,824 61,416 Deferred tax liabilities Tax depreciation in excess of book depreciation (7,172) (9,117) FHLB and FRB stock (3,912) (3,836) Mortgage-servicing rights (3,825) (3,518) Leasing activities (12,829) (10,860) Retirement obligation (10,197) (13,754) Intangible assets (18,462) (16,081) Deferred loan fees and costs (1,638) (933) Prepaid expenses (645) (680) Limited partnership investments (312) (2,957) Fair value adjustments on business combinations (6,736) (6,900) Net unrealized gains on investment securities 0 (5,791) Foreign exchange deferred income 0 (428) ASU 2016-01 unrealized gain/loss-equity securities (2,237) (2,339) Right of use assets (12,911) (13,390) Other (3,653) (2,426) Total deferred tax liabilities (84,529) (93,010) Total net deferred tax asset (liability) $ 70,295 $ (31,594)
Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block]	A progression of gross unrecognized tax benefits as of December 31, 2022, 2021 and 2020 is as follows: (Dollars in thousands) 2022 2021 2020 Balance at beginning of year $ 2,386 $ 2,386 $ 3,006 Settlements 0 0 (620) Balance at end of year $ 2,386 $ 2,386 $ 2,386

EMPLOYEE BENEFIT PLANS (Tables)

EMPLOYEE BENEFIT PLANS (Tables)	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Schedule of Amounts Recognized in Balance Sheet and Income Statement [Table Text Block]	The following tables set forth information concerning amounts recognized in First Financial's Consolidated Balance Sheets and Consolidated Statements of Income related to the Company's pension plan: December 31, (Dollars in thousands) 2022 2021 Change in benefit obligation Benefit obligation at beginning of year $ 93,271 $ 87,494 Service cost 9,065 9,128 Interest cost 2,585 2,157 Actuarial (gain) loss (16,655) 2,588 Benefits paid, excluding settlement (8,260) (8,096) Benefit obligation at end of year 80,006 93,271 Change in plan assets Fair value of plan assets at beginning of year 163,382 155,704 Actual return on plan assets (21,673) 15,774 Benefits paid, excluding settlement (8,260) (8,096) Fair value of plan assets at end of year 133,449 163,382 Amounts recognized in the Consolidated Balance Sheets Assets 53,443 70,111 Liabilities 0 0 Net amount recognized $ 53,443 $ 70,111 Amounts recognized in accumulated other comprehensive income (loss) Net actuarial loss $ 41,628 $ 27,264 Net prior service cost 32 (270) Deferred tax assets (9,637) (6,148) Net amount recognized $ 32,023 $ 20,846 Change in accumulated other comprehensive income (loss) $ 11,177 $ (4,066) Accumulated benefit obligation $ 79,236 $ 92,316
Schedule of Components of Net Periodic Benefit Cost [Table Text Block]	The components of net periodic benefit cost are shown in the table that follows: December 31, (Dollars in thousands) 2022 2021 2020 Service cost $ 9,065 $ 9,128 $ 7,932 Interest cost 2,585 2,157 2,455 Expected return on assets (10,982) (10,118) (9,824) Amortization of prior service cost (302) (413) (413) Recognized net actuarial loss 1,636 2,611 2,334 Net periodic benefit (income) cost 2,002 3,365 2,484 Other changes recognized in accumulated other comprehensive income (loss) Net actuarial (gain) loss 16,001 (3,068) (2,001) Prior service cost 0 0 0 Amortization of prior service cost 302 413 413 Amortization of gain (1,636) (2,611) (2,334) Total recognized in accumulated other comprehensive income (loss) 14,667 (5,266) (3,922) Total recognized in net periodic benefit cost and accumulated other comprehensive income (loss) $ 16,669 $ (1,901) $ (1,438)
Defined Benefit Plan, Assumptions [Table Text Block]	The pension plan assumptions are shown in the table that follows: December 31, 2022 2021 2020 Benefit obligations Discount rate 5.50 % 2.89 % 2.55 % Rate of compensation increase 3.50 % 3.50 % 3.50 % Weighted average interest crediting rate 5.20 % 2.58 % 2.14 % Net periodic benefit cost Discount rate 2.89 % 2.55 % 3.33 % Expected return on plan assets 7.25 % 7.25 % 7.25 % Rate of compensation increase 3.50 % 3.50 % 3.50 % Weighted average interest crediting rate 2.58 % 2.14 % 2.82 %
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]	The fair value of the plan assets as of December 31, 2022 by asset category is shown in the table that follows: Fair Value Measurements (Dollars in thousands) Total Quoted Prices in Significant Significant Asset Category Cash $ 158 $ 158 $ 0 $ 0 U. S. Government agencies 4,602 0 4,602 0 Fixed income mutual funds 47,234 47,234 0 0 Equity mutual funds 67,316 67,316 0 0 Total assets in fair value hierarchy 119,310 114,708 4,602 0 Collective trusts 14,139 0 0 0 Investments at fair value $ 133,449 $ 114,708 $ 4,602 $ 0 The fair value of the plan assets as of December 31, 2021 by asset category is shown in the table that follows: Fair Value Measurements (Dollars in thousands) Total Quoted Prices in Significant Significant Asset Category Cash $ 122 $ 122 $ 0 $ 0 U. S. Government agencies 3,535 0 3,535 0 Fixed income mutual funds 63,526 63,526 0 0 Equity mutual funds 83,000 83,000 0 0 Total assets in fair value hierarchy 150,183 146,648 3,535 0 Collective trusts 13,199 0 0 0 Investments at fair value $ 163,382 $ 146,648 $ 3,535 $ 0
Schedule of Expected Benefit Payments [Table Text Block]	The following benefit payments, which reflect expected future service, are expected to be paid: (Dollars in thousands) Expected benefit payments 2023 $ 5,810 2024 6,310 2025 7,056 2026 6,994 2027 8,497 Thereafter 46,009

ACCUMULATED OTHER COMPREHENSI_2

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Related Tax Effects Allocated to Other Comprehensive Income and Accumulated Other Comprehensive Income (Loss)	The related tax effects allocated to other comprehensive income and accumulated other comprehensive income (loss) are as follows: December 31, 2022 Total other comprehensive income (loss) Total accumulated (Dollars in thousands) Prior to Reclass Pre-tax Tax effect Net of tax Beginning balance Net activity Ending balance Unrealized gain (loss) on debt securities $ (444,257) $ 569 $ (444,826) $ 97,863 $ (346,963) $ 21,038 $ (346,963) $ (325,925) Retirement obligation (16,000) (1,334) (14,666) 3,489 (11,177) (20,846) (11,177) (32,023) Foreign currency translation (90) 0 (90) 0 (90) (625) (90) (715) Total $ (460,347) $ (765) $ (459,582) $ 101,352 $ (358,230) $ (433) $ (358,230) $ (358,663) December 31, 2021 Total other comprehensive income (loss) Total accumulated other (Dollars in thousands) Prior to Reclass Pre-tax Tax-effect Net of tax Beginning Balance Net Activity Ending Balance Unrealized gain (loss) on debt securities $ (67,759) $ (759) $ (67,000) $ 14,462 $ (52,538) $ 73,576 $ (52,538) $ 21,038 Retirement obligation 3,068 (2,198) 5,266 (1,200) 4,066 (24,912) 4,066 (20,846) Foreign currency translation (625) 0 (625) 0 (625) 0 (625) (625) Total $ (65,316) $ (2,957) $ (62,359) $ 13,262 $ (49,097) $ 48,664 $ (49,097) $ (433) December 31, 2020 Total other comprehensive income (loss) Total accumulated other (Dollars in thousands) Prior to Reclass Pre-tax Tax-effect Net of tax Beginning Balance Net Activity Ending Balance Unrealized gain (loss) on debt securities $ 36,643 $ (4,563) $ 41,206 $ (8,894) $ 32,312 $ 41,264 $ 32,312 $ 73,576 Retirement obligation 2,001 (1,921) 3,922 (893) 3,029 (27,941) 3,029 (24,912) Total $ 38,644 $ (6,484) $ 45,128 $ (9,787) $ 35,341 $ 13,323 $ 35,341 $ 48,664
Other Accumulated Comprehensive income reclassified from AOCI [Table Text Block]	The following table details the activity reclassified from accumulated other comprehensive income into income during the period: Amount Reclassified from Accumulated Other Comprehensive Income (1) December 31, (Dollars in thousands) 2022 2021 2020 Affected Line Item in the Consolidated Statements of Income Realized gains and losses on securities available-for-sale $ 569 $ (759) $ (4,563) Net gain (loss) on sales/transfers of investment securities Defined benefit pension plan Amortization of prior service cost (2) 302 413 413 Other noninterest expense Recognized net actuarial loss (2) (1,636) (2,611) (2,334) Other noninterest expense Amortization and settlement charges of defined benefit pension items (1,334) (2,198) (1,921) Total reclassifications for the period, before tax $ (765) $ (2,957) $ (6,484) (1) Negative amounts are debits to profit/loss. (2) Included in the computation of net periodic pension cost (see Note 17 - Employee Benefit Plans for additional details).

CAPITAL (Tables)

CAPITAL (Tables)	12 Months Ended
	Dec. 31, 2022
Banking Regulation, Total Capital [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]	Actual Minimum capital PCA requirement to be (Dollars in thousands) Capital Ratio Capital Ratio Capital Ratio December 31, 2022 Common equity tier 1 capital to risk-weighted assets Consolidated $ 1,399,420 10.83 % $ 904,626 7.00 % N/A N/A First Financial Bank 1,581,328 12.26 % 903,244 7.00 % $ 838,726 6.50 % Tier 1 capital to risk-weighted assets Consolidated 1,443,698 11.17 % 1,098,475 8.50 % N/A N/A First Financial Bank 1,581,900 12.26 % 1,096,796 8.50 % 1,032,278 8.00 % Total capital to risk-weighted assets Consolidated 1,762,971 13.64 % 1,356,939 10.50 % N/A N/A First Financial Bank 1,640,671 12.71 % 1,354,865 10.50 % 1,290,348 10.00 % Leverage Consolidated 1,443,698 8.89 % 649,636 4.00 % N/A N/A First Financial Bank 1,581,900 9.76 % 648,607 4.00 % 810,759 5.00 % Actual Minimum capital PCA requirement to be (Dollars in thousands) Capital Ratio Capital Ratio Capital Ratio December 31, 2021 Common equity tier 1 capital to risk-weighted assets Consolidated $ 1,262,789 10.85 % $ 814,954 7.00 % N/A N/A First Financial Bank 1,513,175 13.02 % 813,731 7.00 % $ 755,607 6.50 % Tier 1 capital to risk-weighted assets Consolidated 1,306,571 11.22 % 989,587 8.50 % N/A N/A First Financial Bank 1,513,708 13.02 % 988,102 8.50 % 929,978 8.00 % Total capital to risk-weighted assets Consolidated 1,642,549 14.11 % 1,222,431 10.50 % N/A N/A First Financial Bank 1,589,570 13.67 % 1,220,597 10.50 % 1,162,473 10.00 % Leverage Consolidated 1,306,571 8.70 % 600,410 4.00 % N/A N/A First Financial Bank 1,513,708 10.10 % 599,578 4.00 % 749,472 5.00 %

STOCK OPTIONS AND AWARDS (Table

STOCK OPTIONS AND AWARDS (Tables)	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Stock option activity for the year ended December 31, 2022, is summarized as follows: (Dollars in thousands, except share and per share data) Number of shares Weighted Weighted average Aggregate intrinsic value Outstanding at beginning of year 20,515 $ 10.98 Granted 0 0.00 Exercised (15,660) 11.32 Forfeited or expired 0 0.00 Outstanding at end of year 4,855 $ 9.86 0.27 years $ 70 Exercisable at end of year 4,855 $ 9.86 0.27 years $ 70
Cash Proceeds Received and Tax Benefit from Share-based Payment Awards [Table Text Block]	2022 2021 2020 Total intrinsic value of options exercised $ 208 $ 114 $ 86 Cash received from exercises $ 177 $ 64 $ 72 Tax benefit from exercises $ 3,095 $ 2,229 $ 1,776
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]	Activity in restricted stock for the previous three years ended December 31 is summarized as follows: 2022 2021 2020 Number of shares Weighted Number of shares Weighted Number of shares Weighted Nonvested at beginning of year 839,733 $ 22.30 763,283 $ 22.04 530,569 $ 27.19 Granted 945,193 23.57 539,020 22.69 503,311 18.62 Vested (407,386) 28.05 (386,848) 22.24 (233,828) 26.07 Forfeited (148,194) 18.40 (75,722) 22.86 (36,769) 23.79 Nonvested at end of year 1,229,346 $ 21.28 839,733 $ 22.30 763,283 $ 22.04

EARNINGS PER COMMON SHARE (Tabl

EARNINGS PER COMMON SHARE (Tables)	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share: (Dollars in thousands, except share and per share data) 2022 2021 2020 Numerator Net income $ 217,612 $ 205,160 $ 155,810 Denominator Basic earnings per common share - weighted average shares 93,528,712 95,034,690 97,363,952 Effect of dilutive securities Employee stock awards 1,058,139 862,695 729,146 Diluted earnings per common share - adjusted weighted average shares 94,586,851 95,897,385 98,093,098 Earnings per share available to common shareholders Basic $ 2.33 $ 2.16 $ 1.60 Diluted $ 2.30 $ 2.14 $ 1.59

FAIR VALUE DISCLOSURES (Tables)

FAIR VALUE DISCLOSURES (Tables)	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Estimated Fair Values of Financial Instruments	The estimated fair values of First Financial's financial instruments not measured at fair value on a recurring or nonrecurring basis in the consolidated financial statements were as follows: Carrying Estimated fair value (Dollars in thousands) value Total Level 1 Level 2 Level 3 December 31, 2022 Financial assets Cash and short-term investments $ 595,683 $ 595,683 $ 595,683 $ 0 $ 0 Investment securities held-to-maturity 84,021 76,485 0 76,485 0 Other investments 143,160 143,160 1,171 132,853 9,136 Loans and leases 10,165,994 9,916,353 0 0 9,916,353 Accrued interest receivable 63,721 63,721 0 16,233 47,488 Financial liabilities Deposits 12,701,177 12,670,747 0 12,670,747 0 Short-term borrowings 1,287,156 1,287,156 1,287,156 0 0 Long-term debt 346,672 348,041 0 348,041 0 Accrued interest payable 11,150 11,150 3,835 7,315 0 Carrying Estimated Fair Value (Dollars in thousands) Value Total Level 1 Level 2 Level 3 December 31, 2021 Financial assets Cash and short-term investments $ 434,842 $ 434,842 $ 434,842 $ 0 $ 0 Investment securities held-to-maturity 98,420 99,898 0 99,898 0 Other investments 102,971 102,971 1,331 92,025 9,615 Loans and leases 9,156,307 9,172,111 0 0 9,172,111 Accrued interest receivable 44,627 44,627 0 15,170 29,457 Financial liabilities Deposits 12,871,954 12,869,567 0 12,869,567 0 Short-term borrowings 296,203 296,203 296,203 0 0 Long-term debt 409,832 411,569 0 411,569 0 Accrued interest payable 4,498 4,498 0 4,498 0
Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis	The financial assets and liabilities measured at fair value on a recurring basis in the consolidated financial statements, were as follows: Fair Value Measurements Using Assets/Liabilities (Dollars in thousands) Level 1 Level 2 Level 3 at Fair Value December 31, 2022 Assets Investment securities available-for-sale $ 32,696 $ 3,341,096 $ 35,856 $ 3,409,648 Loans held for sale 0 7,918 0 7,918 Interest rate derivative contracts 0 152,846 0 152,846 Foreign exchange derivative contracts 0 204,882 0 204,882 Total $ 32,696 $ 3,706,742 $ 35,856 $ 3,775,294 Liabilities Interest rate derivative contracts $ 0 $ 153,119 $ 0 $ 153,119 Foreign exchange derivative contracts 0 204,882 0 204,882 Total $ 0 $ 358,001 $ 0 $ 358,001 Fair Value Measurements Using Assets/Liabilities (Dollars in thousands) Level 1 Level 2 Level 3 at Fair Value December 31, 2021 Assets Investment securities available-for-sale $ 34,776 $ 4,134,889 $ 38,181 $ 4,207,846 Loans held for sale 0 29,482 0 29,482 Interest rate derivative contracts 0 92,328 0 92,328 Foreign exchange derivative contracts 0 120,768 0 120,768 Total $ 34,776 $ 4,377,467 $ 38,181 $ 4,450,424 Liabilities Interest rate derivative contracts $ 0 $ 92,444 $ 0 $ 92,444 Foreign exchange derivative contracts 0 120,768 0 120,768 Total $ 0 $ 213,212 $ 0 $ 213,212
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The following table presents a reconciliation for certain AFS securities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the years ended December 31, 2022, 2021 and 2020. (dollars in thousands) December 31, 2022 December 31, 2021 December 31, 2020 Beginning balance $ 38,181 $ 40,575 $ 9,190 Accretion (amortization) (56) (38) 1 Increase (decrease) in fair value 45 44 (17) Purchases (settlements) (2,313) (2,400) 31,401 Ending balance $ 35,857 $ 38,181 $ 40,575
Summary of Financial Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis	The following table summarizes financial assets and liabilities measured at fair value on a nonrecurring basis: Fair Value Measurements Using (Dollars in thousands) Level 1 Level 2 Level 3 December 31, 2022 Assets Collateral dependent loans Commercial $ 0 $ 0 $ 4,240 Commercial real estate 0 0 4,015 OREO 0 0 0 Operating leases 0 0 0 Fair Value Measurements Using (Dollars in thousands) Level 1 Level 2 Level 3 December 31, 2021 Assets Collateral dependent loans Commercial $ 0 $ 0 $ 4,449 Commercial real estate 0 0 14,618 OREO 0 0 0

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	6 Months Ended
	Jun. 30, 2020
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table provides the purchase price calculation as of the acquisition date, identifiable assets purchased and liabilities assumed at their estimated fair value. (Dollars in thousands) Summit Purchase consideration Cash consideration $ 102,994 Liabilities paid with cash concurrent with close 10,487 Stock consideration 10,000 Earn out 3,606 Total purchase consideration 127,087 Assets acquired Cash 4,413 Finance leases 41,894 Premises and equipment 707 Operating leases 75,309 Intangible assets 34,585 Other assets 28,927 Total assets acquired 185,835 Liabilities assumed Long-term borrowings 96,511 Other liabilities 25,973 Total liabilities assumed 122,484 Net identifiable assets 63,351 Goodwill $ 63,736

FIRST FINANCIAL BANCORP. (PAR_2

FIRST FINANCIAL BANCORP. (PARENT COMPANY ONLY) FINANCIAL INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2022
Condensed Financial Information Disclosure [Abstract]
Schedule of Condensed Balance Sheet	Balance Sheets December 31, (Dollars in thousands) 2022 2021 Assets Cash $ 91,013 $ 49,746 Investment securities 1,681 1,836 Subordinated notes from subsidiaries 7,500 7,500 Investment in subsidiaries Commercial bank 2,161,338 2,447,095 Non-banks 11,246 10,417 Total investment in subsidiaries 2,172,584 2,457,512 Premises and equipment 283 1,311 Other assets 86,355 77,132 Total assets $ 2,359,416 $ 2,595,037 Liabilities Short-term borrowings $ 0 $ 20,000 Subordinated notes 311,707 310,864 Dividends payable 1,271 1,042 Other liabilities 5,065 4,189 Total liabilities 318,043 336,095 Shareholders’ equity 2,041,373 2,258,942 Total liabilities and shareholders’ equity $ 2,359,416 $ 2,595,037
Schedule of Condensed Income Statement	Statements of Income and Comprehensive Income (Loss) Years Ended December 31, (Dollars in thousands) 2022 2021 2020 Income Interest income $ 37 $ 34 $ 27 Noninterest income 13 215 0 Net gain (loss) on equity securities (156) 448 272 Dividends from subsidiaries 171,900 202,000 81,725 Total income 171,794 202,697 82,024 Expenses Interest expense 16,624 15,900 14,172 Salaries and employee benefits 13,547 9,784 8,004 Professional services 256 2,343 1,160 Other 5,581 5,186 5,163 Total expenses 36,008 33,213 28,499 Income before income taxes and equity in undistributed net earnings of subsidiaries 135,786 169,484 53,525 Income tax expense (benefit) (8,523) (7,787) (6,145) Equity in undistributed earnings (loss) of subsidiaries 73,303 27,889 96,140 Net income $ 217,612 $ 205,160 $ 155,810 Comprehensive income (loss) $ (140,618) $ 156,063 $ 191,151
Schedule of Condensed Cash Flow Statement	Statements of Cash Flows Years Ended December 31, (Dollars in thousands) 2022 2021 2020 Operating activities Net income $ 217,612 $ 205,160 $ 155,810 Adjustments to reconcile net income to net cash provided by operating activities Equity in undistributed (earnings) loss of subsidiaries (73,303) (27,889) (96,140) Depreciation and amortization 860 859 712 Stock-based compensation expense 13,379 9,635 7,678 Unrealized (gain) loss on equity securities 156 (448) (272) Deferred income taxes (475) (224) (158) (Decrease) increase in dividends payable 229 368 (175) (Decrease) increase in other liabilities 634 (751) (22) Decrease (increase) in other assets (8,748) (8,096) 8,907 Net cash provided by (used in) operating activities 150,344 178,614 76,340 Investing activities Capital contributions to subsidiaries 0 (113,152) 0 Other 1,011 0 0 Net cash (used in) provided by investing activities 1,011 (113,152) 0 Financing activities (Decrease) increase in short-term borrowings (20,000) 20,000 0 Proceeds from long-term borrowings 0 (10,592) 150,000 Cash dividends paid on common stock (86,606) (87,316) (89,691) Purchases of common stock 0 (108,077) (16,686) Proceeds from exercise of stock options, net of shares purchased 177 64 72 Other (3,659) (2,697) (3,002) Net cash provided by (used in) financing activities (110,088) (188,618) 40,693 Net increase (decrease) in cash 41,267 (123,156) 117,033 Cash at beginning of year 49,746 172,902 55,869 Cash at end of year $ 91,013 $ 49,746 $ 172,902

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Financing Receivables (Details)	12 Months Ended
	Dec. 31, 2022 USD ($)
Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured Loans, Loan Relationships, Review Threshold Amount Minimum	$ 250,000

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Premises and Equipment (Details)	12 Months Ended
	Dec. 31, 2022
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Minimum | Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Minimum | Furniture, Fixtures, and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Minimum | Software, Hardware, and Data Handling Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum | Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Maximum | Furniture, Fixtures, and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Maximum | Software, Hardware, and Data Handling Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Interest Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	$ 47,488	$ 29,500
Held-to-maturity Securities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	400	200
Available-for-sale Securities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	$ 15,900	$ 14,900

RECENTLY ADOPTED AND ISSUED A_2

RECENTLY ADOPTED AND ISSUED ACCOUNTING STANDARDS - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method		$ 17	$ 61,505
Off-Balance Sheet, Credit Loss, Liability, Change in Method, Credit Loss Expense (Reversal)	$ 12,200
Cumulative Effect, Period of Adoption, Adjustment
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest				$ (56,882)
Retained earnings | Cumulative Effect, Period of Adoption, Adjustment
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest				$ (56,882)

RECENTLY ADOPTED AND ISSUED A_3

RECENTLY ADOPTED AND ISSUED ACCOUNTING STANDARDS ASC 326 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Loans and Leases Receivable, Allowance	$ 132,977	$ 131,992	$ 175,679	$ 57,650
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method		17	61,505
Off-Balance Sheet, Credit Loss, Liability, Change in Method, Credit Loss Expense (Reversal)	12,200
Commercial & Industrial
Loans and Leases Receivable, Allowance	42,313	44,052	51,454	18,584
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		9,901
Lease financing
Loans and Leases Receivable, Allowance	3,571	1,633	995	971
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	17		118
Construction real estate
Loans and Leases Receivable, Allowance	13,527	11,874	21,736	2,381
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		11,579
Commercial real estate
Loans and Leases Receivable, Allowance	41,106	53,420	76,795	23,579
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		24,118
Residential real estate
Loans and Leases Receivable, Allowance	12,684	6,225	8,560	5,299
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		5,490
Home equity
Loans and Leases Receivable, Allowance	12,447	9,643	11,869	4,787
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		8,430
Installment
Loans and Leases Receivable, Allowance	4,945	1,097	1,215	392
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		801
Credit card
Loans and Leases Receivable, Allowance	2,384	$ 4,048	3,055	$ 1,657
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	$ 0		$ 1,068

RESTRICTIONS ON CASH AND DIVI_2

RESTRICTIONS ON CASH AND DIVIDENDS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Restrictions on Subsidiary Dividends, Loans or Advances [Line Items]
Average Restriction on Cash and Due From Bank Accounts	$ 0	$ 0
Restricted Cash	25	$ 34
Subsidiaries [Member]
Restrictions on Subsidiary Dividends, Loans or Advances [Line Items]
Retained Earnings, Unappropriated	801.2
Amount Available for Dividend Distribution without Affecting Capital Adequacy Requirements	$ 219.3

INVESTMENT SECURITIES INVESTMEN

INVESTMENT SECURITIES INVESTMENTS - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Gain (Loss) on Securities [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale	$ 277,082	$ 375,276	$ 122,248
Debt Securities, Available-for-sale, Realized Gain	1,000	6,800	900
Debt Securities, Available-for-sale, Realized Loss	1,600	7,600	800
Available For Sale Securities Net Realized Gain Loss Tax Provision	(132)	(173)	19
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Transfer, Amount	0	0
Debt Securities, Available-for-Sale, Restricted	1,500,000	1,500,000
Debt Securities, Held-to-maturity, Allowance for Credit Loss	$ 0	$ 0
NumberOfSecuritiesInSecurityPortfolio	1,251	1,418
NumberOfSecuritiesInUnrealizedLossPosition	891	327
Debt Securities, Held-to-maturity, Nonaccrual	$ 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	$ (7,641)	$ (485)
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale			$ 117,800

INVESTMENTS - Summary of Held-T

INVESTMENTS - Summary of Held-To-Maturity and Available-For-Sale Investment Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Investment Holdings [Line Items]
Total	$ 84,021	$ 98,420
Held To Maturity unrecognized gain	105	1,963
Held To Maturity unrecognized loss	7,641	485
Held-to-Maturity Market Value	76,485	99,898
Investment Securities, Available-for-sale, Amortized Cost, Total	3,827,418	4,180,589
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	834	58,386
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(418,604)	(31,129)
Investment Securities, Available-for-sale	3,409,648	4,207,846
U.S. Treasuries
Investment Holdings [Line Items]
Total	0	0
Held To Maturity unrecognized gain	0	0
Held To Maturity unrecognized loss	0	0
Held-to-Maturity Market Value	0	0
Investment Securities, Available-for-sale, Amortized Cost, Total	37,312	34,961
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	4
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(4,616)	(189)
Investment Securities, Available-for-sale	32,696	34,776
Securities of U.S. government agencies and corporations
Investment Holdings [Line Items]
Total	0	0
Held To Maturity unrecognized gain	0	0
Held To Maturity unrecognized loss	0	0
Held-to-Maturity Market Value	0	0
Investment Securities, Available-for-sale, Amortized Cost, Total	80,382	78,998
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	248
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(13,914)	(129)
Investment Securities, Available-for-sale	66,468	79,117
Mortgage-backed securities-residential
Investment Holdings [Line Items]
Total	0	0
Held To Maturity unrecognized gain	0	0
Held To Maturity unrecognized loss	0	0
Held-to-Maturity Market Value	0	0
Investment Securities, Available-for-sale, Amortized Cost, Total	747,478	728,050
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	47	6,635
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(97,462)	(10,548)
Investment Securities, Available-for-sale	650,063	724,137
Mortgage-backed securities-commercial
Investment Holdings [Line Items]
Total	35,363	46,362
Held To Maturity unrecognized gain	0	651
Held To Maturity unrecognized loss	4,114	0
Held-to-Maturity Market Value	31,249	47,013
Investment Securities, Available-for-sale, Amortized Cost, Total	676,934	729,948
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2	4,294
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(47,374)	(2,352)
Investment Securities, Available-for-sale	629,562	731,890
Collateralized mortgage obligations
Investment Holdings [Line Items]
Total	9,280	11,882
Held To Maturity unrecognized gain	0	221
Held To Maturity unrecognized loss	827	0
Held-to-Maturity Market Value	8,453	12,103
Investment Securities, Available-for-sale, Amortized Cost, Total	538,970	696,258
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	181	7,979
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(61,439)	(6,497)
Investment Securities, Available-for-sale	477,712	697,740
Obligations of state and other political subdivisions
Investment Holdings [Line Items]
Total	8,128	8,926
Held To Maturity unrecognized gain	105	915
Held To Maturity unrecognized loss	201	0
Held-to-Maturity Market Value	8,032	9,841
Investment Securities, Available-for-sale, Amortized Cost, Total	832,066	1,058,735
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	565	35,591
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(124,168)	(8,594)
Investment Securities, Available-for-sale	708,463	1,085,732
Asset-backed Securities
Investment Holdings [Line Items]
Total	0	0
Held To Maturity unrecognized gain	0	0
Held To Maturity unrecognized loss	0	0
Held-to-Maturity Market Value	0	0
Investment Securities, Available-for-sale, Amortized Cost, Total	772,261	720,638
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	39	1,521
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(60,975)	(2,578)
Investment Securities, Available-for-sale	711,325	719,581
Other securities
Investment Holdings [Line Items]
Total	31,250	31,250
Held To Maturity unrecognized gain	0	176
Held To Maturity unrecognized loss	2,499	485
Held-to-Maturity Market Value	28,751	30,941
Investment Securities, Available-for-sale, Amortized Cost, Total	142,015	133,001
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	2,114
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(8,656)	(242)
Investment Securities, Available-for-sale	$ 133,359	$ 134,873

INVESTMENTS - Summary of Invest

INVESTMENTS - Summary of Investment Securities by Estimated Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Held-to-Maturity Amortized Cost
Amortized cost	$ 84,021	$ 98,420
Held-to-Maturity Market Value
Held-to-Maturity Market Value	76,485	99,898
Available-for-Sale Amortized Cost
Amortized Cost	3,827,418	4,180,589
Available-for-Sale Market Value
Investment securities	3,409,648	4,207,846
One Year or Less
Held-to-Maturity Amortized Cost
Amortized cost	0
Held-to-Maturity Market Value
Held-to-Maturity Market Value	0
Available-for-Sale Amortized Cost
Amortized Cost	8,230
Available-for-Sale Market Value
Investment securities	8,125
After One Year Through Five Years
Held-to-Maturity Amortized Cost
Amortized cost	2,584
Held-to-Maturity Market Value
Held-to-Maturity Market Value	2,662
Available-for-Sale Amortized Cost
Amortized Cost	93,629
Available-for-Sale Market Value
Investment securities	89,551
After Five Years Through Ten Years
Held-to-Maturity Amortized Cost
Amortized cost	34,920
Held-to-Maturity Market Value
Held-to-Maturity Market Value	32,410
Available-for-Sale Amortized Cost
Amortized Cost	292,581
Available-for-Sale Market Value
Investment securities	255,143
After Ten Years
Held-to-Maturity Amortized Cost
Amortized cost	1,874
Held-to-Maturity Market Value
Held-to-Maturity Market Value	1,711
Available-for-Sale Amortized Cost
Amortized Cost	697,335
Available-for-Sale Market Value
Investment securities	588,167
Mortgage-backed securities-residential
Held-to-Maturity Amortized Cost
Amortized cost	0	0
Held-to-Maturity Market Value
Held-to-Maturity Market Value	0	0
Available-for-Sale Amortized Cost
Amortized Cost	747,478	728,050
Available-for-Sale Market Value
Investment securities	650,063	724,137
Mortgage-backed securities-commercial
Held-to-Maturity Amortized Cost
Amortized cost	35,363	46,362
Held-to-Maturity Market Value
Held-to-Maturity Market Value	31,249	47,013
Available-for-Sale Amortized Cost
Amortized Cost	676,934	729,948
Available-for-Sale Market Value
Investment securities	629,562	731,890
Collateralized mortgage obligations
Held-to-Maturity Amortized Cost
Amortized cost	9,280	11,882
Held-to-Maturity Market Value
Held-to-Maturity Market Value	8,453	12,103
Available-for-Sale Amortized Cost
Amortized Cost	538,970	696,258
Available-for-Sale Market Value
Investment securities	477,712	697,740
Asset-backed Securities
Held-to-Maturity Amortized Cost
Amortized cost	0	0
Held-to-Maturity Market Value
Held-to-Maturity Market Value	0	0
Available-for-Sale Amortized Cost
Amortized Cost	772,261	720,638
Available-for-Sale Market Value
Investment securities	$ 711,325	$ 719,581

INVESTMENTS - Age of Gross Unre

INVESTMENTS - Age of Gross Unrealized Losses and Associated Fair Value by Investment Category (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Investments, Unrealized Loss Position [Line Items]
Document Period End Date	Dec. 31, 2022
Less than 12 Months Fair Value	$ 1,539,037	$ 1,970,822
Less than 12 Months Unrealized Loss	(92,628)	(27,427)
12 Months or More Fair Value	1,823,088	171,838
12 Months or More Unrealized Loss	(333,617)	(4,187)
Total Fair Value	3,362,125	2,142,660
Total Unrealized Loss	(426,245)	(31,614)
U.S. Treasuries
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	2,383	24,755
Less than 12 Months Unrealized Loss	(46)	(190)
12 Months or More Fair Value	30,313	0
12 Months or More Unrealized Loss	(4,570)	0
Total Fair Value	32,696	24,755
Total Unrealized Loss	(4,616)	(190)
Securities of U.S. government agencies and corporations
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	0	17,382
Less than 12 Months Unrealized Loss	0	(128)
12 Months or More Fair Value	66,468	0
12 Months or More Unrealized Loss	(13,914)	0
Total Fair Value	66,468	17,382
Total Unrealized Loss	(13,914)	(128)
Mortgage-backed securities-residential
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	195,972	459,098
Less than 12 Months Unrealized Loss	(10,413)	(8,375)
12 Months or More Fair Value	443,415	78,090
12 Months or More Unrealized Loss	(87,049)	(2,173)
Total Fair Value	639,387	537,188
Total Unrealized Loss	(97,462)	(10,548)
Mortgage-backed securities-commercial
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	457,863	205,520
Less than 12 Months Unrealized Loss	(21,020)	(2,149)
12 Months or More Fair Value	189,123	13,818
12 Months or More Unrealized Loss	(30,468)	(203)
Total Fair Value	646,986	219,338
Total Unrealized Loss	(51,488)	(2,352)
Collateralized mortgage obligations
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	205,456	369,318
Less than 12 Months Unrealized Loss	(13,059)	(6,110)
12 Months or More Fair Value	271,377	12,485
12 Months or More Unrealized Loss	(49,207)	(387)
Total Fair Value	476,833	381,803
Total Unrealized Loss	(62,266)	(6,497)
Obligations of state and other political subdivisions
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	301,073	380,735
Less than 12 Months Unrealized Loss	(31,397)	(7,543)
12 Months or More Fair Value	368,673	55,568
12 Months or More Unrealized Loss	(92,972)	(1,051)
Total Fair Value	669,746	436,303
Total Unrealized Loss	(124,369)	(8,594)
Asset-backed Securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	250,946	482,118
Less than 12 Months Unrealized Loss	(9,410)	(2,578)
12 Months or More Fair Value	422,090	0
12 Months or More Unrealized Loss	(51,565)	0
Total Fair Value	673,036	482,118
Total Unrealized Loss	(60,975)	(2,578)
Other securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	125,344	31,896
Less than 12 Months Unrealized Loss	(7,283)	(354)
12 Months or More Fair Value	31,629	11,877
12 Months or More Unrealized Loss	(3,872)	(373)
Total Fair Value	156,973	43,773
Total Unrealized Loss	$ (11,155)	$ (727)

LOANS - Additional Information

LOANS - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) loans	Dec. 31, 2021 USD ($) loans	Dec. 31, 2020 USD ($) loans	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Restructured Loans | loans	134	150	155
Total restructured loans	$ 21,000	$ 27,600	$ 21,800
Restructured Loans, Accrual Status	11,000	11,600	7,100
Restructured Loans, Nonaccrual Status	10,000	16,000	14,700
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend	0	200			$ 300
Restructured Loans, Allowance for Loan and Lease Losses Included in Reserves	5,000	6,300
Restructured Loans, Portion Determined to be Uncollectible	3,200	1,700	1,700
Accruing TDRs performing in accordance with restructured terms for more than one year	5,600	5,000
Real Estate Acquired Through Foreclosure	191	98	1,287	$ 2,033
Paycheck Protection Program Amount of Funding		55,600
Unearned fees		2,600
Loans and Leases Receivable, Net of Deferred Income	10,298,971	9,288,299
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount	0	16,500	$ 320,200
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Paycheck Protection Program Amount of Funding	3,000
Unearned fees	100
Loans and Leases Receivable, Net of Deferred Income	3,410,272	2,720,028
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 10,691	8,305
Financing Receivable, Modifications, Number of Contracts | loans	15
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 8,242	$ 17,362
Financing Receivable, Modifications, Number of Contracts | loans	6	7
Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 178	$ 203
Lease financing | Summit Funding Group, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 41,900

LOANS - Commercial and Consumer

LOANS - Commercial and Consumer Credit Exposure by Risk Attribute (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 2,402,422	$ 1,945,075
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,892,719	1,550,642
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,223,810	1,740,914
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,219,466	847,991
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	664,072	631,630
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,142,818	1,114,203
Financing Receivable, before Allowance for Credit Loss	8,545,307	7,830,455
Financing Receivable, Revolving	1,753,664	1,457,844
Loans and Leases Receivable, Net of Deferred Income	10,298,971	9,288,299
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	884,911	713,807
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	580,887	447,365
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	364,134	348,343
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	231,821	181,554
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	124,136	138,731
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	226,012	161,218
Financing Receivable, before Allowance for Credit Loss	2,411,901	1,991,018
Financing Receivable, Revolving	998,371	729,010
Loans and Leases Receivable, Net of Deferred Income	3,410,272	2,720,028
Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	879,836	711,198
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	561,890	442,064
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	348,123	339,507
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	209,758	164,273
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	112,282	119,580
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	206,656	154,835
Financing Receivable, before Allowance for Credit Loss	2,318,545	1,931,457
Financing Receivable, Revolving	971,080	700,246
Loans and Leases Receivable, Net of Deferred Income	3,289,625	2,631,703
Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,740	389
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	13,821	4,867
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	4,125	5,993
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	14,047	16,057
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	8,523	6,511
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	5,544	4,918
Financing Receivable, before Allowance for Credit Loss	48,800	38,735
Financing Receivable, Revolving	18,055	21,505
Loans and Leases Receivable, Net of Deferred Income	66,855	60,240
Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,335	2,220
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	5,176	434
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	11,886	2,843
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	8,016	1,224
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,331	12,640
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	13,812	1,465
Financing Receivable, before Allowance for Credit Loss	44,556	20,826
Financing Receivable, Revolving	9,236	7,259
Loans and Leases Receivable, Net of Deferred Income	53,792	28,085
Commercial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	0
Lease financing
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	171,398	31,697
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	25,638	31,752
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	13,775	19,095
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	12,961	15,494
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,413	6,821
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,939	4,765
Financing Receivable, before Allowance for Credit Loss	236,124	109,624
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	236,124	109,624
Lease financing | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	167,035	31,697
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	25,638	21,536
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	13,705	19,095
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	12,797	15,494
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,402	6,821
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,930	4,765
Financing Receivable, before Allowance for Credit Loss	231,507	99,408
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	231,507	99,408
Lease financing | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	10,216
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	70	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss	70	10,216
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	70	10,216
Lease financing | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	4,363	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	164	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	11	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	9	0
Financing Receivable, before Allowance for Credit Loss	4,547	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	4,547	0
Lease financing | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	0
Construction real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	89,116	95,991
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	291,034	206,952
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	96,823	96,726
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4,902	24,890
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,556	317
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	353	12,719
Financing Receivable, before Allowance for Credit Loss	488,784	437,595
Financing Receivable, Revolving	23,266	18,299
Loans and Leases Receivable, Net of Deferred Income	512,050	455,894
Construction real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	89,116	95,991
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	276,639	200,421
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	96,823	96,726
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4,902	15,886
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	390	317
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	353	12,719
Financing Receivable, before Allowance for Credit Loss	468,223	422,060
Financing Receivable, Revolving	23,266	18,299
Loans and Leases Receivable, Net of Deferred Income	491,489	440,359
Construction real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	14,395	6,531
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	9,004
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,166	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss	20,561	15,535
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	20,561	15,535
Construction real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	0
Construction real estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	0
Commercial real estate-investor
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	643,174	538,799
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	490,125	386,702
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	324,627	984,363
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	733,021	392,580
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	344,029	316,631
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	532,074	469,101
Financing Receivable, before Allowance for Credit Loss	3,067,050	3,088,176
Financing Receivable, Revolving	27,014	66,579
Loans and Leases Receivable, Net of Deferred Income	3,094,064	3,154,755
Commercial real estate-investor | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	643,174	537,183
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	470,085	379,217
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	301,510	944,915
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	719,699	367,946
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	300,772	294,147
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	508,639	434,641
Financing Receivable, before Allowance for Credit Loss	2,943,879	2,958,049
Financing Receivable, Revolving	26,153	66,579
Loans and Leases Receivable, Net of Deferred Income	2,970,032	3,024,628
Commercial real estate-investor | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	13,090	7,479
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	23,111	18,136
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	9,297	18,006
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	26,079	15,566
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	13,804	34,153
Financing Receivable, before Allowance for Credit Loss	85,381	93,340
Financing Receivable, Revolving	861	0
Loans and Leases Receivable, Net of Deferred Income	86,242	93,340
Commercial real estate-investor | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	1,616
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	6,950	6
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	6	21,312
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4,025	6,628
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	17,178	6,918
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	9,631	307
Financing Receivable, before Allowance for Credit Loss	37,790	36,787
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	37,790	36,787
Commercial real estate-investor | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	0
Commercial real estate-owner
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	165,411	205,423
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	155,566	187,574
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	171,431	129,953
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	107,730	151,727
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	115,564	122,600
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	231,868	266,979
Financing Receivable, before Allowance for Credit Loss	947,570	1,064,256
Financing Receivable, Revolving	11,125	7,603
Loans and Leases Receivable, Net of Deferred Income	958,695	1,071,859
Commercial real estate-owner | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	165,411	204,291
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	155,041	184,564
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	170,587	121,150
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	101,137	135,463
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	112,063	119,489
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	211,377	259,504
Financing Receivable, before Allowance for Credit Loss	915,616	1,024,461
Financing Receivable, Revolving	11,125	7,565
Loans and Leases Receivable, Net of Deferred Income	926,741	1,032,026
Commercial real estate-owner | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	970
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	2,283
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	2,262
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,479	3,751
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	1,381
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	14,040	5,512
Financing Receivable, before Allowance for Credit Loss	15,519	16,159
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	15,519	16,159
Commercial real estate-owner | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	162
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	525	727
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	844	6,541
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	5,114	12,513
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,501	1,730
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	6,451	1,963
Financing Receivable, before Allowance for Credit Loss	16,435	23,636
Financing Receivable, Revolving	0	38
Loans and Leases Receivable, Net of Deferred Income	16,435	23,674
Commercial real estate-owner | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	0
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	26,416	42,370
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	33,550	45,799
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	38,524	14,757
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	11,811	11,288
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	8,155	7,659
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	25,415	30,822
Financing Receivable, before Allowance for Credit Loss	143,871	152,695
Financing Receivable, Revolving	589,920	555,704
Loans and Leases Receivable, Net of Deferred Income	733,791	708,399
Home equity | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	26,411	42,298
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	33,414	45,638
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	38,226	14,713
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	11,733	11,221
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	8,051	7,603
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	24,985	30,588
Financing Receivable, before Allowance for Credit Loss	142,820	152,061
Financing Receivable, Revolving	585,712	553,245
Loans and Leases Receivable, Net of Deferred Income	728,532	705,306
Home equity | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	5	72
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	136	161
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	298	44
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	78	67
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	104	56
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	430	234
Financing Receivable, before Allowance for Credit Loss	1,051	634
Financing Receivable, Revolving	4,208	2,459
Loans and Leases Receivable, Net of Deferred Income	5,259	3,093
Installment
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	100,906	58,215
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	39,488	12,829
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	7,262	8,245
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,921	5,550
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,881	3,926
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,284	2,257
Financing Receivable, before Allowance for Credit Loss	157,742	91,022
Financing Receivable, Revolving	52,153	28,432
Loans and Leases Receivable, Net of Deferred Income	209,895	119,454
Installment | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	100,256	58,209
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	38,694	12,768
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	7,244	8,213
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,915	5,541
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,861	3,925
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,242	2,201
Financing Receivable, before Allowance for Credit Loss	156,212	90,857
Financing Receivable, Revolving	51,854	28,353
Loans and Leases Receivable, Net of Deferred Income	208,066	119,210
Installment | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	650	6
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	794	61
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	18	32
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	6	9
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	20	1
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	42	56
Financing Receivable, before Allowance for Credit Loss	1,530	165
Financing Receivable, Revolving	299	79
Loans and Leases Receivable, Net of Deferred Income	1,829	244
Credit card
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Financing Receivable, Revolving	51,815	52,217
Loans and Leases Receivable, Net of Deferred Income	51,815	52,217
Credit card | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Financing Receivable, Revolving	51,287	51,772
Loans and Leases Receivable, Net of Deferred Income	51,287	51,772
Credit card | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss	0	0
Financing Receivable, Revolving	528	445
Loans and Leases Receivable, Net of Deferred Income	528	445
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	321,090	258,773
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	276,431	231,669
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	207,234	139,432
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	113,299	64,908
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	53,338	34,945
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	120,873	166,342
Financing Receivable, before Allowance for Credit Loss	1,092,265	896,069
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	1,092,265	896,069
Residential real estate | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	320,676	258,537
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	274,816	230,699
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	205,948	138,239
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	110,745	64,310
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	51,583	34,606
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	114,642	162,924
Financing Receivable, before Allowance for Credit Loss	1,078,410	889,315
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	1,078,410	889,315
Residential real estate | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	414	236
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,615	970
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,286	1,193
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	2,554	598
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,755	339
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	6,231	3,418
Financing Receivable, before Allowance for Credit Loss	13,855	6,754
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	$ 13,855	$ 6,754

LOANS - Loan Delinquency, inclu

LOANS - Loan Delinquency, including Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	$ 33,897	$ 25,202
Current	10,265,074	9,263,097
Total loans and leases	10,298,971	9,288,299
Greater than 90 days past due and still accruing	857	137
30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	17,727	6,519
60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	9,783	5,380
Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	6,387	13,303
Commercial
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	5,948	5,084
Current	3,404,324	2,714,944
Total loans and leases	3,410,272	2,720,028
Greater than 90 days past due and still accruing	0	0
Commercial | 30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	5,375	303
Commercial | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	72	2,006
Commercial | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	501	2,775
Lease financing
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	7,107	93
Current	229,017	109,531
Total loans and leases	236,124	109,624
Greater than 90 days past due and still accruing	742	0
Lease financing | 30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	5,212	93
Lease financing | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	1,052	0
Lease financing | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	843	0
Construction real estate
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	0	0
Current	512,050	455,894
Total loans and leases	512,050	455,894
Greater than 90 days past due and still accruing	0	0
Construction real estate | 30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	0	0
Construction real estate | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	0	0
Construction real estate | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	0	0
Commercial real estate-investor
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	0	6,540
Current	3,094,064	3,148,215
Total loans and leases	3,094,064	3,154,755
Greater than 90 days past due and still accruing	0	0
Commercial real estate-investor | 30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	0	89
Commercial real estate-investor | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	0	42
Commercial real estate-investor | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	0	6,409
Commercial real estate-owner
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	5,286	2,900
Current	953,409	1,068,959
Total loans and leases	958,695	1,071,859
Greater than 90 days past due and still accruing	0	0
Commercial real estate-owner | 30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	26	56
Commercial real estate-owner | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	5,216	2,207
Commercial real estate-owner | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	44	637
Commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans and leases	4,052,759	4,226,614
Residential real estate
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	9,588	6,755
Current	1,082,677	889,314
Total loans and leases	1,092,265	896,069
Greater than 90 days past due and still accruing	0	0
Residential real estate | 30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	4,254	4,379
Residential real estate | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	2,074	262
Residential real estate | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	3,260	2,114
Home equity
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	3,663	3,092
Current	730,128	705,307
Total loans and leases	733,791	708,399
Greater than 90 days past due and still accruing	0	0
Home equity | 30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	1,725	1,214
Home equity | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	729	692
Home equity | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	1,209	1,186
Installment
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	1,778	244
Current	208,117	119,210
Total loans and leases	209,895	119,454
Greater than 90 days past due and still accruing	0	0
Installment | 30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	874	162
Installment | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	490	37
Installment | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	414	45
Credit card
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	527	494
Current	51,288	51,723
Total loans and leases	51,815	52,217
Greater than 90 days past due and still accruing	115	137
Credit card | 30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	261	223
Credit card | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	150	134
Credit card | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	$ 116	$ 137

LOANS - Restructured Loans (Det

LOANS - Restructured Loans (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) loans entity d	Dec. 31, 2021 USD ($) loans entity	Dec. 31, 2020 USD ($) loans entity	Dec. 31, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Extended Maturities	$ 3,346,000	$ 0	$ 0
Adjusted Interest Rates	3,106,000	0	0
Combined Rate And Maturity	0	0	0
Forebearance Agreements	4,477,000	7,328,000	4,759,000
Other	2,271,000	5,378,000	11,765,000
Total	$ 13,290,000	$ 19,429,000	$ 17,202,000
Number of Restructured Loans | loans	134	150	155
Restructured loans, Number of Loans | loans	25	35	45
Restructured loans, Restructured loans, Pre-Modification Loan Balance	$ 17,795,000	$ 27,776,000	$ 17,323,000
Restructured loans, Period End Balance	$ 13,290,000	$ 19,429,000	$ 17,202,000
Restructured loans with payment default within 12 months of modification, Number of Loans | loans	2	1	1
Restructured loans with payment default within 12 months of modification, Period End Balance		$ 200,000	$ 29,000
Total restructured loans	$ 21,000,000	27,600,000	21,800,000
Restructured Loans, Accrual Status	11,000,000	11,600,000	7,100,000
Restructured Loans, Nonaccrual Status	10,000,000	16,000,000	14,700,000
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend	0	200,000		$ 300,000
Restructured Loans, Allowance for Loan and Lease Losses Included in Reserves	5,000,000	6,300,000
Accruing TDRs performing in accordance with restructured terms for more than one year	$ 5,600,000	5,000,000
Restructured loans performance threshold (days) | d	90
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount	$ 0	16,500,000	320,200,000
Bankruptcies	90,000	6,723,000	678,000
Payment Deferral [Member] | Interest only payments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount			291,500,000
Payment Deferral [Member] | Full principal and Interest payments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount			$ 28,700,000
Commercial & Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured Loans, Loan Relationships, Review Threshold Amount Minimum	$ 250,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans | loans			8
Restructured loans, Restructured loans, Pre-Modification Loan Balance		9,311,000	$ 14,984,000
Restructured loans, Period End Balance		$ 8,039,000	14,984,000
Financing Receivable, Modifications, Number of Contracts | loans	6	7
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 10,049,000
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 8,825,000
Commercial | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Number of Contracts | entity		2
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Number of Contracts | entity	90
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount			$ 312,500,000
Construction real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans | loans		0	0
Restructured loans, Restructured loans, Pre-Modification Loan Balance		$ 0	$ 0
Restructured loans, Period End Balance		$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	0
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans | loans		8	0
Restructured loans, Restructured loans, Pre-Modification Loan Balance		$ 16,850,000	$ 0
Restructured loans, Period End Balance		$ 9,807,000	$ 0
Financing Receivable, Modifications, Number of Contracts | loans	2
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 6,337,000
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 3,115,000
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans | loans		17	24
Restructured loans, Restructured loans, Pre-Modification Loan Balance		$ 1,585,000	$ 1,953,000
Restructured loans, Period End Balance		$ 1,553,000	$ 1,847,000
Financing Receivable, Modifications, Number of Contracts | loans	15
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 1,376,000
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 1,317,000
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans | loans		2	11
Restructured loans, Restructured loans, Pre-Modification Loan Balance		$ 30,000	$ 351,000
Restructured loans, Period End Balance		$ 30,000	$ 349,000
Financing Receivable, Modifications, Number of Contracts | loans	1
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 32,000
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 32,000
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans | loans		1	2
Restructured loans, Restructured loans, Pre-Modification Loan Balance		$ 0	$ 35,000
Restructured loans, Period End Balance		$ 0	$ 22,000
Financing Receivable, Modifications, Number of Contracts | loans	1
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 1,000
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 1,000
Installment | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Number of Contracts | entity			53
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount			$ 7,700,000
Hotel [Member] | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount			$ 186,200,000
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Percent			58.20%
Franchise [Member] | Payment Deferral [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount			$ 44,300,000
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Percent			13.80%

LOANS - Nonaccrual, Restructure

LOANS - Nonaccrual, Restructured and Impaired Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	$ 11,908	$ 28,793	$ 25,919
Financing Receivable, Nonaccrual, No Allowance	16,715	19,599	54,833
Nonaccrual loans	28,623	48,392	80,752
Restructured loans - accrual status	11,000	11,600	7,100
Interest income effect
Gross amount of interest that would have been recorded under original terms	3,247	5,132	5,892
Interest included in income
Nonaccrual loans	1,134	1,618	1,636
Restructured loans	424	314	426
Impaired Financing Receivable, Interest Income, Accrual Method	1,558	1,932	2,062
Net impact on interest income	1,689	3,200	3,830
Loans and Leases Receivable-Nonaccrual, future commitment to lend	0	0	0
Restructured loans - nonaccrual status	10,000	16,000	14,700
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	6,692	11,077	18,711
Financing Receivable, Nonaccrual, No Allowance	1,550	6,285	10,519
Nonaccrual loans	8,242	17,362	29,230
Lease financing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	0	0	0
Financing Receivable, Nonaccrual, No Allowance	178	203	0
Nonaccrual loans	178	203	0
Construction real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	0	0	0
Financing Receivable, Nonaccrual, No Allowance	0	0	0
Nonaccrual loans	0	0	0
Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	5,216	17,716	6,957
Financing Receivable, Nonaccrual, No Allowance	570	1,796	27,725
Nonaccrual loans	5,786	19,512	34,682
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	0	0	251
Financing Receivable, Nonaccrual, No Allowance	10,691	8,305	11,350
Nonaccrual loans	10,691	8,305	11,601
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	0	0	0
Financing Receivable, Nonaccrual, No Allowance	3,123	2,922	5,076
Nonaccrual loans	3,123	2,922	5,076
Installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	0	0	0
Financing Receivable, Nonaccrual, No Allowance	603	88	163
Nonaccrual loans	$ 603	$ 88	$ 163

LOANS - Collateral Dependent Lo

LOANS - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 10,298,971	$ 9,288,299
Business assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	8,205	13,171
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,752	13,050
Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,071	6,973
Land
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	119	38
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13,836	11,729
Other Property
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	640	3,431
Total Collateral
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	28,623	48,392
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	8,242	17,362
Commercial | Business assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	8,205	13,171
Commercial | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	15
Commercial | Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	833
Commercial | Land
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Commercial | Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Commercial | Other Property
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	37	3,343
Lease financing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	178	203
Lease financing | Business assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Lease financing | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Lease financing | Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	178	203
Lease financing | Land
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Lease financing | Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Lease financing | Other Property
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Commercial real estate-investor
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	375	6,784
Commercial real estate-investor | Business assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Commercial real estate-investor | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	353	6,362
Commercial real estate-investor | Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Commercial real estate-investor | Land
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Commercial real estate-investor | Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	22	422
Commercial real estate-investor | Other Property
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Commercial real estate-owner
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,411	12,728
Commercial real estate-owner | Business assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Commercial real estate-owner | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,399	6,673
Commercial real estate-owner | Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,893	5,937
Commercial real estate-owner | Land
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	119	38
Commercial real estate-owner | Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	80
Commercial real estate-owner | Other Property
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	10,691	8,305
Residential real estate | Business assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Residential real estate | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Residential real estate | Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Residential real estate | Land
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Residential real estate | Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	10,691	8,305
Residential real estate | Other Property
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Home Equity Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,123	2,922
Home Equity Loan | Business assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Home Equity Loan | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Home Equity Loan | Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Home Equity Loan | Land
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Home Equity Loan | Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,123	2,922
Home Equity Loan | Other Property
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	603	88
Installment | Business assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Installment | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Installment | Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Installment | Land
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Installment | Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Installment | Other Property
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 603	$ 88

LOANS AND LEASES - Leasing (Det

LOANS AND LEASES - Leasing (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
Direct Financing Lease, Lease Receivable	$ 35,081	$ 49,843
Direct Financing Lease, Unguaranteed Residual Asset	16,058	19,714
Sales-type Lease, Lease Receivable	184,985	40,067
Sales-type Lease, Unguaranteed Residual Asset	0	0
Net Investment in Lease, before Allowance for Credit Loss	236,124	109,624
Sales-type and Direct Financing Leases, Interest Income	$ 11,800	$ 2,700	$ 3,800

LOANS - Changes in Other Real E

LOANS - Changes in Other Real Estate Owned (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of year	$ 98	$ 1,287	$ 2,033
Additions	327	98	1,017
Proceeds from Sale of Other Real Estate	192	1,278	2,076
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Other Deduction	42	9	(313)
Balance at end of year	191	98	1,287
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additions	0	98	510
Proceeds from Sale of Other Real Estate	98	947	217
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Other Deduction	0	9	(448)
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additions	327	0	507
Proceeds from Sale of Other Real Estate	94	331	1,859
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Other Deduction	$ 42	$ 0	$ 135

LOANS AND LEASES - Leasing Matu

LOANS AND LEASES - Leasing Maturity (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Receivables [Abstract]
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year One	$ 56,640
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Two	46,366
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Three	39,495
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Four	37,877
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Five	31,826
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, after Year Five	37,512
Sales-type and Direct Financing Leases, Lease Receivable	249,716
Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount	(29,650)
Sales-Type and Direct Financing Leases, Lease Receivable, Payments to be Received	$ 220,066

ALLOWANCE FOR CREDIT LOSSES - C

ALLOWANCE FOR CREDIT LOSSES - Changes in the Allowance for Credit Losses for the Previous Three Years (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance for loan and lease losses
Balance at beginning of year	$ 131,992	$ 175,679	$ 57,650
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method		17	61,505
Provision for loan and lease losses	6,731	(19,024)	70,796
Loans charged off	(12,558)	(32,903)	(21,359)
Recoveries	6,812	8,223	7,087
Total net charge-offs	5,746	24,680	14,272
Balance at end of year	132,977	131,992	175,679
Commercial & Industrial
Allowance for loan and lease losses
Balance at beginning of year	44,052	51,454	18,584
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		9,901
Provision for loan and lease losses	3,221	6,606	25,407
Loans charged off	(5,899)	(15,620)	(5,345)
Recoveries	939	1,612	2,907
Total net charge-offs	4,960	14,008	2,438
Balance at end of year	42,313	44,052	51,454
Lease financing
Allowance for loan and lease losses
Balance at beginning of year	1,633	995	971
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	17		118
Provision for loan and lease losses	2,041	621	758
Loans charged off	(152)	0	(852)
Recoveries	49	0	0
Total net charge-offs	103	0	852
Balance at end of year	3,571	1,633	995
Construction real estate
Allowance for loan and lease losses
Balance at beginning of year	11,874	21,736	2,381
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		11,579
Provision for loan and lease losses	1,653	(8,367)	7,759
Loans charged off	0	(1,498)	0
Recoveries	0	3	17
Total net charge-offs	0	1,495	(17)
Balance at end of year	13,527	11,874	21,736
Commercial real estate
Allowance for loan and lease losses
Balance at beginning of year	53,420	76,795	23,579
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		24,118
Provision for loan and lease losses	(12,951)	(14,689)	38,936
Loans charged off	(3,667)	(13,471)	(12,100)
Recoveries	4,304	4,785	2,262
Total net charge-offs	(637)	8,686	9,838
Balance at end of year	41,106	53,420	76,795
Residential
Allowance for loan and lease losses
Balance at beginning of year	6,225	8,560	5,299
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		5,490
Provision for loan and lease losses	6,509	(2,436)	(2,122)
Loans charged off	(224)	(127)	(488)
Recoveries	174	228	381
Total net charge-offs	50	(101)	107
Balance at end of year	12,684	6,225	8,560
Home equity
Allowance for loan and lease losses
Balance at beginning of year	9,643	11,869	4,787
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		8,430
Provision for loan and lease losses	2,066	(2,376)	(939)
Loans charged off	(160)	(1,073)	(1,541)
Recoveries	898	1,223	1,132
Total net charge-offs	(738)	(150)	409
Balance at end of year	12,447	9,643	11,869
Installment
Allowance for loan and lease losses
Balance at beginning of year	1,097	1,215	392
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		801
Provision for loan and lease losses	5,232	65	12
Loans charged off	(1,549)	(334)	(148)
Recoveries	165	151	158
Total net charge-offs	1,384	183	(10)
Balance at end of year	4,945	1,097	1,215
Credit card
Allowance for loan and lease losses
Balance at beginning of year	4,048	3,055	1,657
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		1,068
Provision for loan and lease losses	(1,040)	1,552	985
Loans charged off	(907)	(780)	(885)
Recoveries	283	221	230
Total net charge-offs	624	559	655
Balance at end of year	$ 2,384	$ 4,048	$ 3,055

ALLOWANCE FOR CREDIT LOSSES -_2

ALLOWANCE FOR CREDIT LOSSES - Changes in the Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	$ 132,977	$ 131,992	$ 175,679	$ 57,650
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method		17	61,505
Commercial & Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	42,313	44,052	51,454	18,584
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		9,901
Lease financing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	3,571	1,633	995	971
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	17		118
Construction real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	13,527	11,874	21,736	2,381
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		11,579
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	41,106	53,420	76,795	23,579
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		24,118
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	12,684	6,225	8,560	5,299
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		5,490
Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	12,447	9,643	11,869	4,787
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		8,430
Installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	4,945	1,097	1,215	392
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	0		801
Credit card
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	2,384	$ 4,048	3,055	$ 1,657
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	$ 0		$ 1,068

ALLOWANCE FOR CREDIT LOSSES ALL

ALLOWANCE FOR CREDIT LOSSES ALLOWANCE FOR CREDIT LOSSES - Additional information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
Interest Receivable	$ 47,488	$ 29,500
Reserves for unfunded commitments	18,400	13,400
Off-Balance Sheet, Credit Loss, Liability, Change in Method, Credit Loss Expense (Reversal)	12,200
Provision for Other Credit Losses	$ 4,982	$ 903	$ (237)

PREMISES AND EQUIPMENT - Schedu

PREMISES AND EQUIPMENT - Schedule of Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 314,650	$ 313,921
Less accumulated depreciation and amortization	125,570	120,881
Total premises and equipment	189,080	193,040
Depreciation	12,900	14,100	$ 15,400
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	49,016	49,402
Buildings [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	157,620	155,337
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	69,855	70,847
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	32,515	30,190
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 5,644	$ 8,145

LEASES - Lease Cost (Details)

LEASES - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating Lease, Cost	$ 7,626	$ 7,425	$ 7,897
Short-term Lease, Cost	8	108	142
Variable Lease, Cost	2,827	2,621	2,532
Total operating lease cost	$ 10,461	$ 10,154	$ 10,571

LEASES - Lease Maturity (Detail

LEASES - Lease Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Lessee, Operating Lease, Liability, to be Paid, Year One	$ 7,681
Lessee, Operating Lease, Liability, to be Paid, Year Two	7,321
Lessee, Operating Lease, Liability, to be Paid, Year Three	7,011
Lessee, Operating Lease, Liability, to be Paid, Year Four	6,736
Lessee, Operating Lease, Liability, to be Paid, Year Five	6,164
Lessee, Operating Lease, Liability, to be Paid, after Year Five	46,808
Total lease payments	81,721
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	$ (17,244)
Operating Lease, Liability	Other liabilities	Other liabilities

LEASES - Schedule of supplement

LEASES - Schedule of supplemental balance sheet information related to leases (Details)	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	13 years 1 month 6 days	13 years 10 months 24 days	15 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent	3.29%	3.25%	3.07%

LEASES - Supplemental cash flow

LEASES - Supplemental cash flow information related to leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating Lease, Payments	$ 7,824	$ 6,860	$ 8,196
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 4,730	$ 6,076	$ 9,725

LEASES - Additional Information

LEASES - Additional Information (Details)	Dec. 31, 2022	Dec. 31, 2021
Operating Lease, Liability	Other liabilities	Other liabilities
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Accrued interest and other assets	Accrued interest and other assets
Accrued interest and other liabilities
Operating Lease, Liability	Other liabilities

OPERATING LEASES - Additional i

OPERATING LEASES - Additional information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating Lease	$ 91,738	$ 60,811
Property, Plant, and Equipment, Lessor Asset under Operating Lease, Accumulated Depreciation	35,000	$ 25,500
Operating Lease, Lease Income, Lease Payments	24,500
Depreciation, Lessor Asset under Operating Lease	20,400
Impairment, Lessor Asset under Operating Lease	$ 0

OPERATING LEASES - Maturity Tab

OPERATING LEASES - Maturity Table (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Leases [Abstract]
Lessor, Operating Lease, Payment to be Received, Year One	$ 27,334
Lessor, Operating Lease, Payment to be Received, Year Two	21,422
Lessor, Operating Lease, Payment to be Received, Year Three	13,149
Lessor, Operating Lease, Payment to be Received, Year Four	7,122
Lessor, Operating Lease, Payment to be Received, Year Five	1,912
Lessor, Operating Lease, Payment to be Received, after Year Five	1,271
Lessor, Operating Lease, Payments to be Received, Total	$ 72,210

GOODWILL AND OTHER INTANGIBLE_3

GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL AND OTHER INTANGIBLE ASSETS-Schedule of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Balance at beginning of year	$ 1,000,749	$ 937,771	$ 937,771
Goodwill	758	62,978	0
Balance at end of year	$ 1,001,507	$ 1,000,749	$ 937,771

GOODWILL AND OTHER INTANGIBLE_4

GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL AND OTHER INTANGIBLE ASSETS-Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 141,928	$ 144,877
Finite-Lived Intangible Assets, Accumulated Amortization	48,009	40,510
Servicing Asset	16,536	15,469
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	41,750	45,256
Finite-Lived Intangible Assets, Accumulated Amortization	26,488	26,911
Customer Lists
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	69,563	69,563
Finite-Lived Intangible Assets, Accumulated Amortization	14,457	8,362
Other
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	14,079	14,589
Finite-Lived Intangible Assets, Accumulated Amortization	$ 7,064	$ 5,237

GOODWILL AND OTHER INTANGIBLE_5

GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL AND OTHER INTANGIBLE ASSETS-Schedule of Future Amortization Expense (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Finite-Lived Intangible Asset, Expected Amortization, Year One	$ 10,538
Finite-Lived Intangible Asset, Expected Amortization, Year Two	9,195
Finite-Lived Intangible Asset, Expected Amortization, Year Three	9,147
Finite-Lived Intangible Asset, Expected Amortization, Year Four	9,094
Finite-Lived Intangible Asset, Expected Amortization, Year Five	$ 9,053

GOODWILL AND OTHER INTANGIBLE_6

GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL AND OTHER INTANGIBLE ASSETS--Additional Information (Details) - USD ($) $ in Thousands			12 Months Ended
	Dec. 31, 2021	Aug. 30, 2019	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Goodwill			$ 758	$ 62,978	$ 0
Intangible assets amortization			$ 11,185	9,839	$ 11,126
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization method			accelerated basis
Estimated weighted average life (in years)			5 years 3 months 18 days
Customer Lists
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization method			straight-line basis
Estimated weighted average life (in years)	12 years	11 years
Customer Lists | Bannockburn [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	$ 31,100		$ 27,500	31,100
Customer Lists | Summit Funding Group
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	$ 30,100		$ 27,600	$ 30,100

DEPOSITS (Details)

DEPOSITS (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deposits [Abstract]
Time Deposit Maturities, Year One	$ 1,320,011
Time Deposit Maturities, Year Two	293,775
Time Deposit Maturities, Year Three	37,093
Time Deposit Maturities, Year Four	37,881
Time Deposit Maturities, Year Five	11,768
Time Deposit Maturities, after Year Five	177
Time	$ 1,700,705	$ 1,330,263

DEPOSITS-Additional Information

DEPOSITS-Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deposits [Abstract]
Time Deposits, at or Above FDIC Insurance Limit	$ 165.1	$ 195.6

BORROWINGS - Schedule of Short-

BORROWINGS - Schedule of Short-term Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Short-term Debt	$ 1,287,156	$ 296,203	$ 166,594
Short-term debt interest rate	4.55%	0.27%	0.05%
Short-term debt, average for the year	$ 817,495	$ 204,503	$ 590,903
Short-term debt, average rate (as a percent)	2.34%	0.10%	1.09%
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Short-term Debt	$ 0	$ 51,203	$ 166,594
Short-term debt interest rate	0%	0.01%	0.05%
Short-term debt, average for the year	$ 29,526	$ 160,967	$ 149,036
Short-term debt, average rate (as a percent)	1.42%	0.07%	0.26%
Federal Home Loan Bank Borrowings [Member]
Short-term Debt [Line Items]
Short-term Debt	$ 1,130,000	$ 225,000	$ 0
Short-term debt interest rate	4.58%	0.18%	0%
Short-term debt, average for the year	$ 672,928	$ 43,371	$ 441,867
Short-term debt, average rate (as a percent)	2.37%	0.20%	1.37%
Short-term Debt
Short-term Debt [Line Items]
Short-term Debt	$ 157,156	$ 20,000	$ 0
Short-term debt interest rate	4.33%	1.90%	0%
Short-term debt, average for the year	$ 115,041	$ 165	$ 0
Short-term debt, average rate (as a percent)	2.38%	1.92%	0%
Line of Credit [Member]
Short-term Debt [Line Items]
Short-term Debt	$ 0	$ 20,000

BORROWINGS BORROWINGS - Repurch

BORROWINGS BORROWINGS - Repurchase Agreements (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Carrying Value of Securities Sold under Repurchase Agreements and Deposits Received for Securities Loaned	$ 0	$ 51.3

BORROWINGS - Schedule of Long-t

BORROWINGS - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Amount
Long term debt and Lease Obligation, interest rate at period end	5.50%	4.88%
Notes Payable to Bank, Current		$ 23,000
Notes Payable, Noncurrent	$ 32,500	73,400
Notes Payable		96,400
Total long-term debt	$ 346,672	$ 409,832
Average Rate
Debt, Weighted Average Interest Rate	5.48%	4.86%
Lessee, Finance Lease, Discount Rate	3.82%	3.81%
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	0%	0%
Debt Instrument, Interest Rate, Stated Percentage	0%	2.77%
Other Notes payable interest rate	4.44%	4.09%
Notes payable interest rate	4.44%	3.77%
Long-term Debt, Weighted Average Interest Rate, at Point in Time	5.40%	4.62%
Maturities of Long-term Debt [Abstract]
2022	$ 6,898
2023	12,408
2024	4,169
2025	6,201
2026	2,173
Thereafter	314,823
Long-term Debt [Member]
Amount
Subordinated Debt	313,705	$ 313,248
Unamortized debt issuance costs	(1,998)	(2,384)
Finance Lease, Liability	1,698	1,781
Other Long-term Debt	775	775
Long-term Debt and Lease Obligation	314,180	313,420
Notes Payable to Bank, Current	0	23,030
Notes Payable, Noncurrent	32,492	73,382
Notes Payable	$ 32,492	$ 96,412

BORROWINGS Borrowings - - Addit

BORROWINGS Borrowings - - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Convertible Subordinated Debt		$ 150,000
Debt Instrument, Basis Spread on Variable Rate		5.09%
Subordinated debt, original issue		$ 120,000
Subordinated Borrowing, Interest Rate		5.13%
Debt, Weighted Average Interest Rate		5.48%	4.86%
Notes Payable			$ 96,400
Bank lines of credit credit			$ 23,000
Debt Instrument, Interest Rate, Stated Percentage		0%	2.77%
Notes Payable, Noncurrent		$ 32,500	$ 73,400
Other Notes payable interest rate		4.44%	4.09%
Book value of FHLB collateral		$ 6,000,000
Line of Credit Facility, Maximum Borrowing Capacity		40,000
Short-term Debt		1,287,156	$ 296,203	$ 166,594
Private Placement [Member]
Debt Instrument [Line Items]
Subordinated Debt		$ 8,400
Debt, Weighted Average Interest Rate		6%
Long-term Debt [Member]
Debt Instrument [Line Items]
Subordinated Borrowing, Interest Rate		5.25%
Short-term Debt
Debt Instrument [Line Items]
Short-term Debt		$ 157,156	20,000	$ 0
Line of Credit [Member]
Debt Instrument [Line Items]
Short-term Debt		0	$ 20,000
Subordinated Debt [Member]
Debt Instrument [Line Items]
Subordinated Debt		$ 49,500
Debt Instrument Maturity Period		30 years
DebtInstrumentMinimumCallablePeriod		5 years
Private Placement [Member]
Debt Instrument [Line Items]
DebtInstrumentMinimumCallablePeriod	5 years

DERIVATIVES - Additional Inform

DERIVATIVES - Additional Information (Detail) $ in Thousands	Dec. 31, 2022 USD ($) entity	Dec. 31, 2021 USD ($) entity
Derivative [Line Items]
Number of counterparties | entity	6	6
Derivative Asset		$ 212,970
Derivative Assets (Liabilities), at Fair Value, Net	$ 0
Derivative Liability	357,698	212,977
Derivative, Notional Amount	$ 19,828,103	$ 17,683,691
Foreign Exchange [Member]
Derivative [Line Items]
Number of counterparties | entity	5	4
Credit Risk Contract [Member]
Derivative [Line Items]
Outstanding liability from counterparty contracts	$ 5	$ 100
Derivative, Notional Amount	379,300	362,800
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	12,000	45,000
Other Credit Derivatives [Member]
Derivative [Line Items]
Outstanding liability from counterparty contracts		3,300
Derivative, Notional Amount	15,300	$ 62,500
Credit Risk Derivative Assets, at Fair Value	$ 4,300
Derivative [Member]
Derivative [Line Items]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Derivative [Member] | Foreign Exchange [Member]
Derivative [Line Items]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Derivative [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 2,200,000	$ 2,400,000
Derivative [Member] | Other Liabilities [Member] | Foreign Exchange [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 7,700,000	$ 6,400,000

DERIVATIVES - Summary of Deriva

DERIVATIVES - Summary of Derivative Financial Instruments and Balances (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 19,828,103	$ 17,683,691
Derivative Asset		212,970
Estimate Fair Value Loss	$ (357,698)	(212,977)
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Accrued interest and other assets
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 2,206,351	2,430,587
Derivative Asset	147,759	7,508
Estimate Fair Value Loss	(5,057)	(84,701)
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other assets
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,206,351	2,430,587
Derivative Asset	5,057	84,694
Estimate Fair Value Loss	(147,759)	(7,508)
Foreign Exchange [Member] | Matched interest rate swaps | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	7,681,006	6,399,432
Derivative Asset	93,804	52,780
Estimate Fair Value Loss	(111,078)	(67,988)
Foreign Exchange [Member] | Matched interest rate swaps | Accrued interest and other assets
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	7,734,395	6,423,085
Derivative Asset	111,078	67,988
Estimate Fair Value Loss	(93,804)	(52,780)
Derivative [Member] | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 2,200,000	$ 2,400,000

DERIVATIVES - Disclosure by Typ

DERIVATIVES - Disclosure by Type of Financial Instrument (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 357,698	$ 212,977
Derivative Liability, Fair Value, Gross Asset	(415,993)	(206,090)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral		6,887
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(58,295)
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	152,816	92,209
Derivative Liability, Fair Value, Gross Asset	(314,048)	(149,647)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(161,232)	(57,438)
Fair Value Hedges | Foreign Exchange [Member] | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	204,882	120,768
Derivative Liability, Fair Value, Gross Asset	(101,945)	(56,443)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	$ 102,937	$ 64,325

DERIVATIVES - Derivative Financ

DERIVATIVES - Derivative Financial Instruments, Average Remaining Maturity and the Weighted-Average Interest Rates being Paid and Received (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Derivative, Notional Amount	$ 19,828,103	$ 17,683,691
Average Maturity (years)	1 year 8 months 12 days
Fair Value	$ 0
Asset conversion swaps | Derivative Financial Instruments Receive Fixed Pay Variable
Derivative [Line Items]
Derivative, Notional Amount	$ 2,206,351
Average Maturity (years)	5 years 3 months 18 days
Fair Value	$ (142,702)
Asset conversion swaps | Derivative Financial Instruments Receive Variable Pay Fixed
Derivative [Line Items]
Derivative, Notional Amount	$ 2,206,351
Average Maturity (years)	5 years 3 months 18 days
Fair Value	$ 142,702
Foreign Exchange [Member] | Derivative Financial Instruments Receive Fixed Pay Variable
Derivative [Line Items]
Derivative, Notional Amount	$ 7,734,395
Average Maturity (years)	8 months 12 days
Fair Value	$ 17,274
Foreign Exchange [Member] | Derivative Financial Instruments Receive Variable Pay Fixed
Derivative [Line Items]
Derivative, Notional Amount	$ 7,681,006
Average Maturity (years)	8 months 12 days
Fair Value	$ (17,274)

RELATED PARTIES TRANSACTIONS (D

RELATED PARTIES TRANSACTIONS (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Loans to Related Parties [Roll Forward]
Beginning balance	$ 3,482
Additions	2,539
Deductions	(403)
Ending balance	5,618
Loans 90 days past due	$ 0

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - Loans and Unfunded Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Commitments [Line Items]
Unused Commitments to Extend Credit	$ 3,904,732	$ 3,248,931
Loans and Leases Receivable, Net of Deferred Income	10,298,971	9,288,299
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments, Amortization	35,755	21,687	$ 13,481
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(37,090)	(21,270)	(13,144)
Low Income Housing Tax Credits
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments, Amortization	11,929	8,894	8,076
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(11,088)	(8,581)	(7,629)
Historic tax credit [Member]
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments, Amortization	0	1,116	474
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(319)	(263)	(563)
New Markets Tax Credit
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments, Amortization	415	210	175
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(210)	(210)	(175)
Renewable Energy Program [Member]
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments, Amortization	23,411	11,467	4,756
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(25,473)	(12,216)	$ (4,777)
Commercial
Other Commitments [Line Items]
Unused Commitments to Extend Credit	1,833,977	1,545,995
Loans and Leases Receivable, Net of Deferred Income	3,410,272	2,720,028
Lease financing
Other Commitments [Line Items]
Unused Commitments to Extend Credit	6,842	18,037
Loans and Leases Receivable, Net of Deferred Income	236,124	109,624
Construction real estate
Other Commitments [Line Items]
Unused Commitments to Extend Credit	689,015	484,038
Loans and Leases Receivable, Net of Deferred Income	512,050	455,894
Commercial real estate-investor
Other Commitments [Line Items]
Unused Commitments to Extend Credit	107,205	65,660
Loans and Leases Receivable, Net of Deferred Income	3,094,064	3,154,755
Commercial real estate-owner
Other Commitments [Line Items]
Unused Commitments to Extend Credit	48,208	29,824
Loans and Leases Receivable, Net of Deferred Income	958,695	1,071,859
Residential real estate
Other Commitments [Line Items]
Unused Commitments to Extend Credit	74,089	50,043
Loans and Leases Receivable, Net of Deferred Income	1,092,265	896,069
Home equity
Other Commitments [Line Items]
Unused Commitments to Extend Credit	903,459	822,343
Loans and Leases Receivable, Net of Deferred Income	733,791	708,399
Installment
Other Commitments [Line Items]
Unused Commitments to Extend Credit	16,073	15,985
Loans and Leases Receivable, Net of Deferred Income	209,895	119,454
Credit card
Other Commitments [Line Items]
Unused Commitments to Extend Credit	225,864	217,006
Loans and Leases Receivable, Net of Deferred Income	$ 51,815	$ 52,217

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES - Investment Holdings Schedule (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	$ 158,440	$ 134,035
Qualified Affordable Housing Project Investments, Commitment	84,334	72,511
Amortization Method Qualified Affordable Housing Project Investments, Amortization	35,755	21,687	$ 13,481
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(37,090)	(21,270)	(13,144)
Low Income Housing Tax Credits
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	126,537	108,974
Qualified Affordable Housing Project Investments, Commitment	70,690	57,341
Amortization Method Qualified Affordable Housing Project Investments, Amortization	11,929	8,894	8,076
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(11,088)	(8,581)	(7,629)
Historic tax credit [Member]
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	17,108	2,581
Qualified Affordable Housing Project Investments, Commitment	11,955	56
Amortization Method Qualified Affordable Housing Project Investments, Amortization	0	1,116	474
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(319)	(263)	(563)
New Markets Tax Credit
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	2,944	3,895
Qualified Affordable Housing Project Investments, Commitment	0	0
Amortization Method Qualified Affordable Housing Project Investments, Amortization	415	210	175
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(210)	(210)	(175)
Renewable Energy Program [Member]
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	11,851	18,585
Qualified Affordable Housing Project Investments, Commitment	1,689	15,114
Amortization Method Qualified Affordable Housing Project Investments, Amortization	23,411	11,467	4,756
Affordable Housing Tax Credits and Other Tax Benefits, Amount	$ (25,473)	$ (12,216)	$ (4,777)

COMMITMENTS AND CONTINGENCIES_3

COMMITMENTS AND CONTINGENCIES - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2020
Commitments and Contingencies Disclosure [Line Items]
Reserves for unfunded commitments	$ 18,400	$ 13,400
Loans and Leases Receivable, Commitments, Fixed Rates	126,300	129,200
Loans and Leases Receivable, Commitments, Variable Rates	$ 4,200,000	$ 3,800,000
Loan Commitments, Fixed Interest Rate Range, Minimum	0%	0%
Loan Commitments, Fixed Interest Rate Range, Maximum	21%	21%
Loan Commitments, Fixed Rate, Maturities, Minimum	1 year	1 year
Loan Commitments, Fixed Rate, Maturities, Maximum	31 years 7 months 6 days	30 years 10 months 24 days
Letters of credit issued to guarantee performance of a client to a third party	$ 31,500	$ 41,100
Derivative, Notional Amount	19,828,103	17,683,691
Litigation Settlement, Expense	3,300	7,100
Estimated Litigation Liability			$ 0
Credit Default Swap
Commitments and Contingencies Disclosure [Line Items]
Derivative, Notional Amount	379,300	362,800
Commitments to Extend Credit
Commitments and Contingencies Disclosure [Line Items]
Commitments outstanding to extend credit	$ 4,400,000	$ 4,000,000

INCOME TAXES (Detail)

INCOME TAXES (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current expense [Abstract]
Federal	$ 24,307	$ 21,397	$ 34,632
State	3,308	2,289	2,349
Total current expense	27,615	23,686	36,981
Deferred (benefit) expense [Abstract]
Federal	(4,399)	10,944	(8,624)
State	894	1,143	244
Total deferred (benefit) expense	(3,505)	12,087	(8,380)
Income tax expense	24,110	35,773	28,601
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income taxes computed at federal statutory rate (21%) on income before income taxes	50,762	50,596	38,726
Benefit from tax-exempt income	(5,743)	(5,613)	(5,901)
Tax credits	(37,331)	(21,561)	(13,064)
Basis reduction on tax credit	2,761	1,346	657
Tax benefit of equity compensation	(154)	(243)	340
State income taxes, net of federal tax benefit	3,320	2,711	2,049
Affordable housing investments	9,341	7,194	6,635
Other	1,154	1,343	(841)
Income tax expense	24,110	35,773	28,601
Deferred tax assets [Abstract]
Allowance for credit losses	30,464	29,754
Deferred compensation	346	292
Postretirement benefits other than pension liability	636	652
Accrued stock-based compensation	2,216	1,836
Interest on nonaccrual loans	406	442
Accrued expenses	7,454	7,286
Deferred Tax Asset, Debt Securities, Available-for-Sale, Unrealized Loss	92,072	0
State net operating loss	1,152	1,746
Deferred tax asset, Leasing liability	15,308	15,794
Federal tax credit carryforwards	4,254	3,049
Other	516	565
Total deferred tax assets	154,824	61,416
Deferred tax liabilities [Abstract]
Tax depreciation greater than book depreciation	(7,172)	(9,117)
FHLB and FRB stock	(3,912)	(3,836)
Mortgage-servicing rights	(3,825)	(3,518)
Leasing activities	(12,829)	(10,860)
Retirement obligations	10,197	13,754
Intangible assets	(18,462)	(16,081)
Deferred loan fees and costs	(1,638)	(933)
Prepaid expenses	(645)	(680)
Limited partnership investments	312	2,957
Unrealized gains on investment securities	0	(5,791)
Foreign exchange deferred income	0	(428)
Deferred Tax Liability, Unrealized gain/loss equity securities	(2,237)	(2,339)
Deferred tax liability, right of use asset	(12,911)	(13,390)
Other	(3,653)	(2,426)
Deferred Tax Liabilities, Gross	(84,529)	(93,010)
Deferred Tax Assets, Net	70,295
Total deferred tax liabilities		(31,594)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Balance at beginning of year	2,386	2,386	3,006
Decrease resulting from settlements	0	0	(620)
Balance at end of year	$ 2,386	$ 2,386	$ 2,386
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21%	21%	21%
Deferred Tax Assets Operating Loss Carryforwards State And Local Acquired	$ 1,500	$ 2,300
Deferred taxes, business combination, valuation allowance	0	0
Retained Earnings For Which No Deferred Income Tax Liability Has Been Recognized	16,100	16,100
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Bad Debt Reserve for Tax Purposes of Qualified Lender	3,400
Unrecognized tax benefits affecting income tax rate	1,900	1,900	$ 1,900
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	0	0	$ 0
Fair value adjustments on business combinations	$ (6,736)	$ (6,900)

EMPLOYEE BENEFIT PLANS (Details

EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Pension Cost (Reversal of Cost)	$ 2,002	$ 3,365	$ 2,484
Payment for Pension Benefits	$ 0	0	0
Defined Contribution Plan, Maximum Annual Contribution Percent by Employee	50%
Defined Contribution Plan, Cost	$ 0	0	0
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	0
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	93,271	87,494
Service cost	9,065	9,128	7,932
Interest cost	2,585	2,157	2,455
Actuarial gain (loss)	(16,655)	2,588
Defined Benefit Plan, Benefit Obligation, Benefits Paid	8,260	8,096
Benefit obligation at end of year	80,006	93,271	87,494
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	163,382	155,704
Actual return on plan assets	(21,673)	15,774
Defined Benefit Plan, Plan Assets, Benefits Paid	8,260	8,096
Fair value of plan assets at end of year	133,449	163,382	155,704
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Assets	53,443	70,111
Liabilities	0	0
Net amount recognized	53,443	70,111
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), after Tax [Abstract]
Net actuarial loss	41,628	27,264
Net prior service cost	32	(270)
Deferred tax assets	(9,637)	(6,148)
Net amount recognized	32,023	20,846	24,912	$ 27,941
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	11,177	(4,066)	(3,029)
Accumulated benefit obligation	79,236	92,316
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	9,065	9,128	7,932
Interest cost	2,585	2,157	2,455
Expected return on plan assets	(10,982)	(10,118)	(9,824)
Amortization of prior service cost	(302)	(413)	(413)
Defined Benefit Plan, Amortization of Gain (Loss)	1,636	2,611	2,334
Net periodic benefit (income) cost	2,002	3,365	2,484
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax	16,001	(3,068)	(2,001)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	0	0	0
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax	302	413	413
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	(1,636)	(2,611)	(2,334)
Total recognized in accumulated other comprehensive income	14,667	(5,266)	(3,922)
Total recognized in net periodic benefit cost and accumulated other comprehensive income	$ 16,669	$ (1,901)	$ (1,438)
Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	5.50%	2.89%	2.55%
Rate of compensation increase	3.50%	3.50%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate	5.20%	2.58%	2.14%
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.89%	2.55%	3.33%
Expected return on plan assets	7.25%	7.25%	7.25%
Rate of compensation increase	3.50%	3.50%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted-Average Interest Crediting Rate	2.58%	2.14%	2.82%
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2023	$ 5,810
2024	6,310
2025	7,056
2026	6,994
2027	8,497
Thereafter	46,009
Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	150,183
Fair value of plan assets at end of year	119,310	$ 150,183
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	146,648
Fair value of plan assets at end of year	114,708	146,648
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	3,535
Fair value of plan assets at end of year	4,602	3,535
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0
Fair value of plan assets at end of year	0	0
Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	13,199
Fair value of plan assets at end of year	14,139	13,199
Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0
Fair value of plan assets at end of year	0	0
Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0
Fair value of plan assets at end of year	0	0
Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	0
Fair value of plan assets at end of year	$ 0	$ 0

EMPLOYEE BENEFIT PLANS Defined

EMPLOYEE BENEFIT PLANS Defined Benefit Plan, Fair Value on Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	$ 133,449	$ 163,382	$ 155,704
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	114,708	146,648
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	4,602	3,535
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	0	0
Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	119,310	150,183
Cash | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	158	122
Cash | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	0	0
Cash | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	0	0
Cash | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	158	122
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	0	0
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	4,602	3,535
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	0	0
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	4,602	3,535
Fixed income mutual funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	47,234	63,526
Fixed income mutual funds | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	0	0
Fixed income mutual funds | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	0	0
Fixed income mutual funds | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	47,234	63,526
Equity mutual funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	67,316	83,000
Equity mutual funds | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	0	0
Equity mutual funds | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	0	0
Equity mutual funds | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	67,316	83,000
Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	0	0
Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	0	0
Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	0	0
Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	$ 14,139	$ 13,199

REVENUE RECOGNITION (Details)

REVENUE RECOGNITION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue Recognition and Deferred Revenue [Abstract]
Interchange income	$ 29.5	$ 27.9	$ 23.9
Credit card expense	$ 15.1	$ 13.6	$ 12.2

ACCUMULATED OTHER COMPREHENSI_3

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Comprehensive Income (Loss), before Reclassification Adjustments and Tax [Abstract]
Unrealized gain (loss) on debt securities	$ (444,257)	$ (67,759)	$ 36,643
Retirement obligations	(16,000)	3,068	2,001
Total	(460,347)	(65,316)	38,644
Other Comprehensive Income (Loss) Reclassifications before Tax [Abstract]
Unrealized gain (loss) on debt securities	569	(759)	(4,563)
Retirement obligation	1,334	2,198	1,921
Total	(765)	(2,957)	(6,484)
Transactions Pre-tax
Unrealized gain (loss) on debt securities	(444,826)	(67,000)	41,206
Retirement obligation	(14,666)	5,266	3,922
Total	(459,582)	(62,359)	45,128
Transactions Tax-effect
Unrealized gain (loss) on debt securities	97,863	14,462	(8,894)
Retirement obligation	3,489	(1,200)	(893)
Total	101,352	13,262	(9,787)
Transactions Net of tax
Unrealized gain (loss) on debt securities	(346,963)	(52,538)	32,312
Retirement obligation	(11,177)	4,066	3,029
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(715)	(625)	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(90)	(625)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	0	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(90)	(625)
Other Comprehensive Income (Loss), Reclassification, Foreign Currency Transaction	0	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	(90)	(625)
Total	(358,230)	(49,097)	35,341
Balances Net of tax
Unrealized gain (loss) on debt securities	(325,925)	21,038	73,576	$ 41,264
Retirement obligation	(32,023)	(20,846)	(24,912)	(27,941)
Total	$ (358,663)	$ (433)	$ 48,664	$ 13,323

ACCUMULATED OTHER COMPREHENSI_4

ACCUMULATED OTHER COMPREHENSIVE INCOME AMOUNT RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Realized gains and losses on securities available for sale	$ 569	$ (759)	$ (4,563)
Amortization of prior service cost	302	413	413
Recognized net actuarial loss	(1,636)	(2,611)	(2,334)
Other Comprehensive Income, Reclassification, Amortization of Defined Benefit Plans items, Pre-tax	(1,334)	(2,198)	(1,921)
Total reclassifications for the period, before tax	$ (765)	$ (2,957)	$ (6,484)

CAPITAL - Risk-Based Capital (D

CAPITAL - Risk-Based Capital (Details) $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital Conservation Buffer-Fully Phased-In	2.50%
Banking Regulation, Total Risk-Based Capital, Excess, Actual	$ 406,000
Banking Regulation, Risk-Based Information [Abstract]
Banking Regulation, Common Equity Tier One Risk-Based Capital, Actual	$ 1,399,420	$ 1,262,789
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Actual	0.1083	0.1085
Banking Regulation, Common Equity Tier One Risk-Based Capital, Capital Adequacy, Minimum	$ 904,626	$ 814,954
Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets	0.070	0.0700
Banking Regulation, Tier One Risk-Based Capital [Abstract]
Banking Regulation, Tier One Risk-Based Capital, Actual	$ 1,443,698	$ 1,306,571
Banking Regulation, Tier One Risk-Based Capital Ratio, Actual	0.1117	0.1122
Banking Regulation, Tier One Risk-Based Capital, Capital Adequacy, Minimum	$ 1,098,475	$ 989,587
Banking Regulation, Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.085	0.0850
Banking Regulation, Total Capital [Abstract]
Banking Regulation, Total Capital, Actual	$ 1,762,971	$ 1,642,549
Banking Regulation, Total Risk-Based Capital Ratio, Actual	0.1364	0.1411
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum	$ 1,356,939	$ 1,222,431
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.1050	0.1050
Banking Regulation, Tier One Leverage Capital [Abstract]
Banking Regulation, Tier One Leverage Capital, Actual	$ 1,443,698	$ 1,306,571
Banking Regulation, Tier One Leverage Capital Ratio, Actual	0.0889	0.0870
Banking Regulation, Tier One Leverage Capital, Capital Adequacy, Minimum	$ 649,636	$ 600,410
Banking Regulation, Tier One Leverage Capital Ratio, Capital Adequacy, Minimum	0.0400	0.0400
Subsidiaries [Member]
Banking Regulation, Risk-Based Information [Abstract]
Banking Regulation, Common Equity Tier One Risk-Based Capital, Actual	$ 1,581,328	$ 1,513,175
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Actual	0.1226	0.1302
Banking Regulation, Common Equity Tier One Risk-Based Capital, Capital Adequacy, Minimum	$ 903,244	$ 813,731
Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets	0.0700	0.0700
Common Equity Tier One Risk Based Capital Required to be Well Capitalized To Risk Weighted Assets	$ 838,726	$ 755,607
Common Equity Tier One Risk Based Capital Required to be Well Capitalized To Risk Weighted Assets	6.50%	6.50%
Banking Regulation, Tier One Risk-Based Capital [Abstract]
Banking Regulation, Tier One Risk-Based Capital, Actual	$ 1,581,900	$ 1,513,708
Banking Regulation, Tier One Risk-Based Capital Ratio, Actual	0.1226	0.1302
Banking Regulation, Tier One Risk-Based Capital, Capital Adequacy, Minimum	$ 1,096,796	$ 988,102
Banking Regulation, Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.0850	0.0850
Tier One Risk Based Capital Required For Capital Adequacy With Buffer To Risk Weighted Assets	0.0800	0.0800
Capital Required for Capital Adequacy to Risk Weighted Assets	$ 1,032,278	$ 929,978
Banking Regulation, Total Capital [Abstract]
Banking Regulation, Total Capital, Actual	$ 1,640,671	$ 1,589,570
Banking Regulation, Total Risk-Based Capital Ratio, Actual	0.1271	0.1367
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum	$ 1,354,865	$ 1,220,597
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.1050	0.1050
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	$ 1,290,348	$ 1,162,473
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum	0.1000	0.1000
Banking Regulation, Tier One Leverage Capital [Abstract]
Banking Regulation, Tier One Leverage Capital, Actual	$ 1,581,900	$ 1,513,708
Banking Regulation, Tier One Leverage Capital Ratio, Actual	0.0976	0.1010
Banking Regulation, Tier One Leverage Capital, Capital Adequacy, Minimum	$ 648,607	$ 599,578
Banking Regulation, Tier One Leverage Capital Ratio, Capital Adequacy, Minimum	0.0400	0.0400
Tier One Leverage Capital Required to be Well Capitalized to Average Assets	$ 810,759	$ 749,472
Banking Regulation, Tier One Leverage Capital Ratio, Well Capitalized, Minimum	0.0500	0.0500

CAPITAL - Share Repurchase (Det

CAPITAL - Share Repurchase (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jan. 26, 2020
Banking Regulation, Total Capital [Abstract]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			5,000,000
Treasury Stock, Shares, Acquired	4,633,355	880,000
Treasury Stock Acquired, Average Cost Per Share	$ 23.33	$ 18.96

STOCK OPTIONS AND AWARDS (Detai

STOCK OPTIONS AND AWARDS (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Noncash Expense		$ 13,379	$ 9,635	$ 7,678
Total unrecognized compensation cost		$ 15,600
Unrecognized compensation cost, period for recognition (in years)		1 year 11 months 12 days
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized		2,951,070
Share-based Compensation Arrangement by Share-based Payment Award, Other Share Increase (Decrease)	83,551
Share-based Compensation Arrangement by Share-based Payment Award, Option Term		10 years
Options outstanding at end of year		4,855	20,515
Activity for stock option plan [Roll Forward]
Outstanding at beginning of year (in shares)		20,515
Granted (in shares)		0	0	0
Exercised (in shares)		(15,660)
Forfeited or expired (in shares)		0
Outstanding at end of year (in shares)		4,855	20,515
Exercised (in shares)		4,855
Weighted average exercise price, outstanding at beginning of year (in dollars per share)		$ 10.98
Weighted average exercise price, granted (in dollars per share)		0
Weighted average exercise price, exercised (in dollars per share)		11.32
Weighted average exercise price, forfeited or expired (in dollars per share)		0
Weighted average exercise price, outstanding at end of year (in dollars per share)		9.86	$ 10.98
Weighted average exercise price, Exercisable (in dollars per share)		$ 9.86
Weighted average remaining contractual term, outstanding at end of year (in years)		3 months 7 days
Weighted average remaining contractual life, exercisable at end of year (in years)		3 months 7 days
Aggregate intrinsic value, outstanding at end of year		$ 70
Aggregate intrinsic value, exercisable at end of year		70
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Total intrinsic value of options exercised		208	$ 114	$ 86
Proceeds from exercise of stock options		177	64	72
Share-based Payment Arrangement, Exercise of Option, Tax Benefit		3,095	2,229	1,776
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested in period, total fair value		$ 11,400	$ 8,600	$ 6,100
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Number of shares nonvested at beginning of year	530,569	839,733	763,283	530,569
Number of shares granted		945,193	539,020	503,311
Number of shares vested		(407,386)	(386,848)	(233,828)
Number of shares forfeited		(148,194)	(75,722)	(36,769)
Number of shares nonvested at end of year		1,229,346	839,733	763,283
Weighted average of shares fair value, nonvested at beginning of year	$ 27.19	$ 22.30	$ 22.04	$ 27.19
Weighted average of shares fair value granted		23.57	22.69	18.62
Weighted average of shares fair value vested		28.05	22.24	26.07
Weighted average of shares fair value forfeited		18.40	22.86	23.79
Weighted average of shares fair value, nonvested at end of year		$ 21.28	$ 22.30	$ 22.04

EARNINGS PER COMMON SHARE - Com

EARNINGS PER COMMON SHARE - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator for basic and diluted earnings per share -income available to common shareholders:
Net income	$ 217,612	$ 205,160	$ 155,810
Denominator for basic earnings per share - weighted average shares	93,528,712	95,034,690	97,363,952
Effect of dilutive securities -
Employee stock awards	1,058,139	862,695	729,146
Denominator for diluted earnings per share - adjusted weighted average shares	94,586,851	95,897,385	98,093,098
Basic	$ 2.33	$ 2.16	$ 1.60
Diluted	$ 2.30	$ 2.14	$ 1.59

EARNINGS PER COMMON SHARE - Add

EARNINGS PER COMMON SHARE - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share Disclosure [Line Items]
Preferred Stock, Shares Authorized	10,000,000	10,000,000	10,000,000
Preferred Stock, Shares Outstanding	0	0	0
Antidilutive Stock Options
Earnings Per Share Disclosure [Line Items]
Stock options and warrants with an exercise price greater than the average market price of the common shares not included in the computation of net income per diluted share	0	0	0

FAIR VALUE DISCLOSURES - Estima

FAIR VALUE DISCLOSURES - Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financial assets
Investment securities held-to-maturity	$ 84,021	$ 98,420
Other investments	143,160	102,971
Loans held for sale	7,900	29,500
Interest Receivable	47,488	29,500
Deposits
Noninterest-bearing	4,135,180	4,185,572
Savings	3,828,139	4,157,374
Time	1,700,705	1,330,263
Deposits	12,701,177	12,871,954
Impaired Commercial And Commercial Real Estate Loans Member
Deposits
Principal Amount of Commercial and Commercial Real Estate Loans	11,900	28,800
Allowance for Loan and Lease Losses, Real Estate	3,700	9,700
Carrying value
Financial assets
Cash and short-term investments	595,683	434,842
Investment securities held-to-maturity	84,021	98,420
Other investments	143,160	102,971
Loans and leases	10,165,994	9,156,307
Interest Receivable	63,721	44,627
Deposits
Deposits	12,701,177	12,871,954
Short-term borrowings	1,287,156	296,203
Long-term debt	346,672	409,832
Interest Payable	11,150	4,498
Fair value
Financial assets
Cash and short-term investments	595,683	434,842
Investment securities held-to-maturity	76,485	99,898
Other investments	143,160	102,971
Loans and leases	9,916,353	9,172,111
Interest Receivable	63,721	44,627
Deposits
Deposits	12,670,747	12,869,567
Short-term borrowings	1,287,156	296,203
Long-term debt	348,041	411,569
Interest Payable	11,150	4,498
Fair Value, Inputs, Level 1 [Member] | Fair value
Financial assets
Cash and short-term investments	595,683	434,842
Investment securities held-to-maturity	0	0
Other investments	1,171	1,331
Loans and leases	0	0
Interest Receivable	0	0
Deposits
Deposits	0	0
Short-term borrowings	1,287,156	296,203
Long-term debt	0	0
Interest Payable	3,835	0
Fair Value, Inputs, Level 2 [Member] | Fair value
Financial assets
Cash and short-term investments	0	0
Investment securities held-to-maturity	76,485	99,898
Other investments	132,853	92,025
Loans and leases	0	0
Interest Receivable	16,233	15,170
Deposits
Deposits	12,670,747	12,869,567
Short-term borrowings	0	0
Long-term debt	348,041	411,569
Interest Payable	7,315	4,498
Fair Value, Inputs, Level 3 [Member] | Fair value
Financial assets
Cash and short-term investments	0	0
Investment securities held-to-maturity	0	0
Other investments	9,136	9,615
Loans and leases	9,916,353	9,172,111
Interest Receivable		29,457
Deposits
Deposits	0	0
Short-term borrowings	0	0
Long-term debt	0	0
Interest Payable	$ 0	$ 0

FAIR VALUE DISCLOSURES - Summar

FAIR VALUE DISCLOSURES - Summary of Financial Assets and Liabilities Measure at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets
Investment Securities, Available-for-sale	$ 3,409,648	$ 4,207,846
Loans Held-for-sale, Fair Value Disclosure	7,900	29,500
Derivatives		212,970
Liabilities
Derivatives	357,698	212,977
Impaired Commercial And Commercial Real Estate Loans Member
Liabilities
Principal Amount of Commercial and Commercial Real Estate Loans	11,900	28,800
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 [Member] | Fair value
Assets
Loans Held-for-sale, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 [Member]
Assets
Investment Securities, Available-for-sale	32,696	34,776
Derivatives		0
Total	32,696	34,776
Liabilities
Total	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 [Member] | Fair value
Assets
Loans Held-for-sale, Fair Value Disclosure	7,918	29,482
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 [Member]
Assets
Investment Securities, Available-for-sale	3,341,096	4,134,889
Derivatives		92,328
Total	3,706,742	4,377,467
Liabilities
Total	358,001	213,212
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 [Member] | Fair value
Assets
Loans Held-for-sale, Fair Value Disclosure	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 [Member]
Assets
Investment Securities, Available-for-sale	35,856	38,181
Derivatives		0
Total	35,856	38,181
Liabilities
Total	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Assets
Investment Securities, Available-for-sale	3,409,648	4,207,846
Loans Held-for-sale, Fair Value Disclosure	7,918	29,482
Derivatives		92,328
Total	3,775,294	4,450,424
Liabilities
Total	358,001	213,212
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 [Member]
Assets
Derivatives	0
Liabilities
Derivatives	0	0
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 [Member]
Assets
Derivatives	152,846
Liabilities
Derivatives	153,119	92,444
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 [Member]
Assets
Derivatives	0
Liabilities
Derivatives	0	0
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Assets
Derivatives	152,846
Liabilities
Derivatives	153,119	92,444
Foreign Exchange [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 [Member]
Assets
Derivatives	0	0
Liabilities
Derivatives	0	0
Foreign Exchange [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 [Member]
Assets
Derivatives	204,882	120,768
Liabilities
Derivatives	204,882	120,768
Foreign Exchange [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 [Member]
Assets
Derivatives	0	0
Liabilities
Derivatives	0	0
Foreign Exchange [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Assets
Derivatives	204,882	120,768
Liabilities
Derivatives	$ 204,882	$ 120,768

FAIR VALUE DISCLOSURES - Reconc

FAIR VALUE DISCLOSURES - Reconciliation of Gains and Losses on Level 3 Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Beginning balance	$ 38,181	$ 40,575	$ 9,190
Accretion (amortization)		(38)	1
Increase (decrease) fair value	45	44	(17)
Settlements	(2,313)	(2,400)	31,401
Ending balance	$ 35,857	$ 38,181	$ 40,575
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other Operating Income

FAIR VALUE DISCLOSURES - Summ_2

FAIR VALUE DISCLOSURES - Summary of Financial Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Detail) - Fair Value, Measurements, Nonrecurring - Fair value - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Inputs, Level 1 [Member] | Operating lease
Assets
Total	$ 0
Fair Value, Inputs, Level 1 [Member] | Real Estate Acquired in Satisfaction of Debt
Assets
Total	0	$ 0
Fair Value, Inputs, Level 1 [Member] | Commercial
Assets
Total	0	0
Fair Value, Inputs, Level 1 [Member] | Commercial real estate
Assets
Total	0	0
Fair Value, Inputs, Level 2 [Member] | Operating lease
Assets
Total	0
Fair Value, Inputs, Level 2 [Member] | Real Estate Acquired in Satisfaction of Debt
Assets
Total	0	0
Fair Value, Inputs, Level 2 [Member] | Commercial
Assets
Total	0	0
Fair Value, Inputs, Level 2 [Member] | Commercial real estate
Assets
Total	0	0
Fair Value, Inputs, Level 3 [Member] | Operating lease
Assets
Total	0
Fair Value, Inputs, Level 3 [Member] | Real Estate Acquired in Satisfaction of Debt
Assets
Total	0	0
Fair Value, Inputs, Level 3 [Member] | Commercial
Assets
Total	4,240	4,449
Fair Value, Inputs, Level 3 [Member] | Commercial real estate
Assets
Total	$ 4,015	$ 14,618

FAIR VALUE DISCLOSURES (Details

FAIR VALUE DISCLOSURES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Loans Held-for-sale, Fair Value Disclosure	$ 7.9	$ 29.5
Financing Receivable, Held-for-Sale	7.5	27.2
Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables	0.4	2.3
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 1.9	$ (3.3)

BUSINESS COMBINATIONS - Additio

BUSINESS COMBINATIONS - Additional Information - Narrative (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Cash consideration	$ 102,994
Stock consideration	10,000
Payments for Merger Related Costs		$ 600	$ 2,600
Total assets acquired	185,835		185,835
Total liabilities	122,484		122,484
Total liabilities assumed	125,894	822	125,894	$ 0
Business Combination, Acquired Direct Financing Lease Receivable	41,900		41,900
Operating leases	75,309		75,309
Goodwill	1,000,749	1,001,507	1,000,749	$ 937,771	$ 937,771
Summit Funding Group, Inc.
Business Acquisition [Line Items]
Business Combination, Consideration Transferred		127,100
Cash consideration		113,500
Stock consideration		10,000
Business Combination, Contingent Consideration, Asset		$ 3,600
Summit Funding Group
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	127,087
Goodwill	$ 63,736		$ 63,736

BUSINESS COMBINATION BUSINESS C

BUSINESS COMBINATION BUSINESS COMBINATIONS (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Cash consideration	$ 102,994
Liabilities paid with cash concurrent with close	10,487
Stock consideration	10,000
Warrant consideration	3,606
Cash	4,413
Loans	41,894
Premises and equipment	707
Operating leases	75,309
Intangible assets	34,585
Other assets	28,927
Total assets acquired	185,835
Other borrowings	96,511
Other liabilities	25,973
Total liabilities assumed	122,484
Net identifiable assets	63,351
Goodwill	1,000,749	$ 1,001,507	$ 937,771	$ 937,771
Summit Funding Group
Business Acquisition [Line Items]
Total purchase consideration	127,087
Goodwill	$ 63,736

FIRST FINANCIAL BANCORP. (PAR_3

FIRST FINANCIAL BANCORP. (PARENT COMPANY ONLY) FINANCIAL INFORMATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Cash	$ 207,501	$ 220,031
Other investments	143,160	102,971
Premises and equipment	189,080	193,040
Total assets	17,003,316	16,329,141
Short-term Debt	1,287,156	296,203	$ 166,594
Other liabilities	626,938	492,210
Total liabilities	14,961,943	14,070,199
Shareholders’ equity	2,041,373	2,258,942	2,282,070	$ 2,247,705
Total liabilities and shareholders’ equity	17,003,316	16,329,141
Income Statement [Abstract]
Noninterest income	189,641	171,506	189,123
Interest Expense	65,863	31,099	68,452
Salaries and employee benefits	269,368	245,924	236,779
Professional services	9,734	11,676	9,961
Income before income taxes and equity in undistributed net earnings of subsidiaries	241,722	240,933	184,411
Income tax expense (benefit)	24,110	35,773	28,601
Net income	217,612	205,160	155,810
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(140,618)	156,063	191,151
Operating activities
Net income	217,612	205,160	155,810
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	31,181	32,136	33,337
Stock-based compensation expense	13,379	9,635	7,678
Equity Securities, FV-NI, Unrealized Gain (Loss)	639	(702)	(9,045)
Deferred income taxes	(3,505)	12,087	(8,380)
Decrease (increase) in other assets	(226,398)	138,225	(288,857)
Net cash provided by (used in) operating activities	200,846	388,157	108,363
Investing activities
Net cash acquired (paid) in business combinations	0	(109,024)	0
Proceeds from sales and maturities of investment securities	704,304	1,139,498	904,821
Payments to Acquire Debt Securities, Available-for-sale	(641,643)	(2,418,290)	(1,551,952)
Payments for (Proceeds from) Other Investing Activities	1,011	0	0
Net cash provided by (used in) investing activities	(883,105)	(510,029)	(1,203,346)
Financing activities
Net (decrease) increase in short-term borrowings	990,953	129,609	(1,149,587)
Cash dividends paid on common stock	(86,606)	(87,316)	(89,691)
Treasury stock purchase	0	(108,077)	(16,686)
Proceeds from exercise of stock options, net of shares purchased	177	64	72
Net cash provided by (used in) financing activities	669,729	110,849	1,125,346
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(12,530)	(11,023)	30,363
Cash and due from banks at beginning of year	220,031
Cash and due from banks at end of year	207,501	220,031
Parent Company [Member]
Statement of Financial Position [Abstract]
Cash	91,013	49,746	172,902	$ 55,869
Other investments	1,681	1,836
Subordinated notes from subsidiaries	7,500	7,500
Premises and equipment	283	1,311
Other assets	86,355	77,132
Total assets	2,359,416	2,595,037
Short-term Debt	0	20,000
Subordinated Debt	311,707	310,864
Dividends payable	1,271	1,042
Other liabilities	5,065	4,189
Total liabilities	318,043	336,095
Shareholders’ equity	2,041,373	2,258,942
Total liabilities and shareholders’ equity	2,359,416	2,595,037
Income Statement [Abstract]
Interest income	37	34	27
Noninterest income	13	215	0
Dividends from subsidiaries	171,900	202,000	81,725
Total income	171,794	202,697	82,024
Interest Expense	16,624	15,900	14,172
Salaries and employee benefits	13,547	9,784	8,004
Professional services	256	2,343	1,160
Other	5,581	5,186	5,163
Total expenses	36,008	33,213	28,499
Income before income taxes and equity in undistributed net earnings of subsidiaries	135,786	169,484	53,525
Income tax expense (benefit)	(8,523)	(7,787)	(6,145)
Income (Loss) from Equity Method Investments	73,303	27,889	96,140
Net income	217,612	205,160	155,810
Operating activities
Net income	217,612	205,160	155,810
Adjustments to reconcile net income to net cash provided by operating activities
Equity in undistributed earnings (loss) of subsidiaries	(73,303)	(27,889)	(96,140)
Depreciation and amortization	860	859	712
Stock-based compensation expense	13,379	9,635	7,678
Equity Securities, FV-NI, Unrealized Gain (Loss)	156	(448)	(272)
Deferred income taxes	(475)	(224)	(158)
(Decrease) increase in dividends payable	229	368	(175)
(Decrease) increase in other liabilities	634	(751)	(22)
Decrease (increase) in other assets	(8,748)	(8,096)	8,907
Net cash provided by (used in) operating activities	150,344	178,614	76,340
Investing activities
Capital contributions to subsidiaries	0	(113,152)	0
Net cash provided by (used in) investing activities	1,011	(113,152)	0
Financing activities
Net (decrease) increase in short-term borrowings	(20,000)	20,000	0
Proceeds from Issuance of Subordinated Long-term Debt	0	(10,592)	150,000
Cash dividends paid on common stock	(86,606)	(87,316)	(89,691)
Treasury stock purchase	0	(108,077)	(16,686)
Proceeds from exercise of stock options, net of shares purchased	177	64	72
Other	(3,659)	(2,697)	(3,002)
Net cash provided by (used in) financing activities	(110,088)	(188,618)	40,693
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	41,267	(123,156)	117,033
Cash and due from banks at beginning of year	49,746	172,902	55,869
Cash and due from banks at end of year	91,013	49,746	$ 172,902
Commercial Banks [Member] | Parent Company [Member]
Statement of Financial Position [Abstract]
Investment in subsidiaries	2,161,338	2,447,095
Nonbanks [Member] | Parent Company [Member]
Statement of Financial Position [Abstract]
Investment in subsidiaries	11,246	10,417
Subsidiaries [Member] | Parent Company [Member]
Statement of Financial Position [Abstract]
Investment in subsidiaries	$ 2,172,584	$ 2,457,512