First Financial Bancorp. (FFBC) 10-K 18 Feb 22 2021 FY Annual report Financial data

Cover

Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 17, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
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			$ 2,227,220,000
Entity Common Stock, Shares Outstanding		94,149,227
Entity Central Index Key	0000708955
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
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, 2021
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, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 220,031	$ 231,054
Interest-bearing deposits with other banks	214,811	20,305
Investment Securities, Available-for-sale	4,207,846	3,424,580
Investment securities held-to-maturity (fair value $99,898 at December 31, 2021 and $136,698 at December 31, 2020)	98,420	131,687
Other investments	102,971	133,198
Loans held for sale, at fair value	29,482	41,103
Loans and leases
Total loans and leases	9,288,299	9,900,970
Loans and Leases Receivable, Allowance	(131,992)	(175,679)
Net loans and leases	9,156,307	9,725,291
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization	193,040	207,211
Property, Plant, and Equipment, Lessor Asset under Operating Lease, after Accumulated Depreciation	73,857
Goodwill	1,000,749	937,771
Other intangibles	88,898	64,552
Accrued interest and other assets	942,729	1,056,382
Deposits
Interest-bearing demand	3,198,745	2,914,787
Savings	4,157,374	3,680,774
Time	1,330,263	1,872,733
Total interest-bearing deposits	8,686,382	8,468,294
Total assets	16,329,141	15,973,134
Noninterest-bearing	4,185,572	3,763,709
Total deposits	12,871,954	12,232,003
Federal funds purchased and securities sold under agreements to repurchase	51,203	166,594
FHLB short-term borrowings	225,000	0
Other Short-term Borrowings	20,000	0
Total short-term borrowings	296,203	166,594
Long-term debt	409,832	776,202
Total borrowed funds	706,035	942,796
Accrued interest and other liabilities	492,210	516,265
Total liabilities	14,070,199	13,691,064
Shareholders' equity
Common stock - no par value	1,640,358	1,638,947
Retained earnings	837,473	720,429
Accumulated other comprehensive income (loss)	(433)	48,664
Treasury stock, at cost,10,132,554 shares in 2021 and 6,259,865 shares in 2020	(218,456)	(125,970)
Total shareholders' equity	2,258,942	2,282,070
Total liabilities and shareholders’ equity	16,329,141	15,973,134
Commercial & industrial
Loans and leases
Total loans and leases	2,720,028	3,007,509
Lease financing
Loans and leases
Total loans and leases	109,624	72,987
Construction real estate
Loans and leases
Total loans and leases	455,894	636,096
Commercial real estate
Loans and leases
Total loans and leases	4,226,614	4,307,858
Residential real estate
Loans and leases
Total loans and leases	896,069	1,003,086
Home equity
Loans and leases
Total loans and leases	708,399	743,099
Installment
Loans and leases
Total loans and leases	119,454	81,850
Credit card
Loans and leases
Total loans and leases	$ 52,217	$ 48,485

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Investment Securities, Available-for-sale, Amortized Cost	$ 4,180,589	$ 3,330,029
Investment securities held-to-maturity, market value	$ 99,898	$ 136,698
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	10,132,554	6,259,865

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Intangible assets amortization	$ 9,839	$ 11,126	$ 9,671
Interest income
Loans and leases, including fees	385,535	431,657	499,009
Investment securities
Taxable	79,212	73,789	90,168
Tax-exempt	18,323	19,242	17,596
Total interest on investment securities	97,535	93,031	107,764
Other earning assets	147	275	805
Total interest income	483,217	524,963	607,578
Interest expense
Deposits	14,435	41,922	79,032
Short-term borrowings	198	6,442	25,235
Long-term borrowings	16,466	20,088	19,057
Total interest expense	31,099	68,452	123,324
Net interest income	452,118	456,511	484,254
Provision for loan and lease losses	(19,024)	70,796	30,598
Provision for Other Credit Losses	903	(237)	(165)
Net interest income after provision for credit losses	470,239	385,952	453,821
Noninterest income
Service charges on deposit accounts	31,876	29,446	37,939
Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions	23,780	21,286	20,728
Bankcard income	14,300	11,726	18,804
Client derivative fees	7,927	10,313	15,662
Foreign exchange income	44,793	39,377	7,739
Net gain from sales of loans	33,021	51,176	14,851
Net gain (loss) on sales/transfers of investment securities	(759)	4,563	(406)
Equity Securities, FV-NI, Unrealized Gain (Loss)	702	9,045	575
Other	15,866	12,191	15,481
Total noninterest income	171,506	189,123	131,373
Noninterest expenses
Salaries and employee benefits	245,924	236,779	209,061
Net occupancy	22,142	23,266	24,069
Furniture and equipment	13,819	14,968	15,903
Data processing	31,363	27,514	21,881
Marketing	7,983	6,414	6,908
Communication	2,930	3,492	3,267
Professional services	11,676	9,961	11,254
Gain (Loss) on Extinguishment of Debt	0	7,257	0
State intangible tax	4,256	6,058	5,829
FDIC assessments	5,630	5,110	1,973
Other	45,250	38,719	32,516
Total noninterest expenses	400,812	390,664	342,332
Income before income taxes	240,933	184,411	242,862
Income tax expense	35,773	28,601	44,787
Net income	$ 205,160	$ 155,810	$ 198,075
Earnings per common share
Basic	$ 2.16	$ 1.60	$ 2.01
Diluted	$ 2.14	$ 1.59	$ 2
Average common shares outstanding - basic	95,034,690	97,363,952	98,305,570
Average common shares outstanding - diluted	95,897,385	98,093,098	98,851,471

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 205,160	$ 155,810	$ 198,075
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on debt securities arising during the period	(52,538)	32,312	51,959
Change in retirement obligation	4,066	3,029	4,649
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	0	0	217
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(625)	0	0
Other comprehensive income (loss)	(49,097)	35,341	56,825
Comprehensive income	$ 156,063	$ 191,151	$ 254,900

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 earningsCumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive income (loss)	Accumulated other comprehensive income (loss)Cumulative Effect, Period of Adoption, Adjustment	Treasury stock
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ 3,542			$ 2,636		$ 906
Balances at January 1, 2018 at Dec. 31, 2018	$ 2,078,249		$ 1,633,256	$ 600,014		$ (44,408)		$ (110,613)
Balances at January 1, 2018 at Dec. 31, 2018			104,281,794					(6,387,508)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	198,075			198,075
Other comprehensive loss	56,825					56,825
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	(89,476)			(89,476)
Stock Issued During Period, Shares, Acquisitions								2,601,823
Common stock issued in connection with business combinations	$ 60,934		$ 13,658					$ 47,276
Treasury Stock, Shares, Acquired	(2,753,272)							(2,753,272)
Treasury Stock, Value, Acquired, Cost Method	$ (66,218)							$ (66,218)
Adjustments to Additional Paid in Capital, Other	0		(7,830)					$ 7,830
Stock Issued During Period, Shares, Other								452,134
Exercise of stock options, net of shares purchased (in shares)								20,424
Exercise of stock options, net of shares purchased	(90)		(264)					$ (354)
Restricted stock awards, net of forfeitures (in shares)								275,603
Restricted stock awards, net of forfeitures	(2,285)		(6,018)					$ 3,733
Share-based compensation expense	7,969		$ 7,969
Ending Balances (in shares) at Dec. 31, 2019			104,281,794					(5,790,796)
Ending Balances at Dec. 31, 2019	2,247,705		$ 1,640,771	711,249		13,323		$ (117,638)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ (56,882)			$ (56,882)
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		1,251					$ 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							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)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Common Stock, Dividends, Per Share, Declared	$ 0.92	$ 0.92	$ 0.90

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities
Net income	$ 205,160	$ 155,810	$ 198,075
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	(18,121)	70,559	30,598
Depreciation and amortization	32,136	33,337	28,138
Stock-based compensation expense	9,635	7,678	7,969
Pension expense (income)	3,365	2,484	1,041
Net amortization (accretion) on investment securities	28,987	21,053	11,430
Net (gain) loss on sales/transfers of investments securities	759	(4,563)	406
Equity Securities, FV-NI, Unrealized Gain (Loss)	(702)	(9,045)	(575)
Originations of loans held for sale	(794,524)	(942,207)	(390,578)
Net (gains) losses on sales of loans held for sale	(33,021)	(51,176)	(14,851)
Proceeds from sales of loans held for sale	825,102	965,960	396,121
Deferred income taxes	12,087	(8,380)	12,590
Operating Lease, Expense	7,425	7,897	7,324
Operating Lease, Payments	(6,860)	(8,196)	(7,335)
Life Insurance, Corporate or Bank Owned, Change in Value	(472)	1,506	3,748
Decrease (increase) in interest receivable	6,463	(9,697)	2,117
(Decrease) increase in interest payable	(1,889)	(7,431)	1,545
Decrease (increase) in other assets	138,225	(288,857)	(165,902)
(Decrease) increase in other liabilities	(24,237)	176,168	71,964
Net cash provided by (used in) operating activities	390,462	109,888	186,329
Investing activities
Proceeds from Sale of Debt Securities, Available-for-sale	375,276	122,248	519,136
Proceeds from calls, paydowns and maturities of securities available-for-sale	1,139,498	904,821	557,034
Payments to Acquire Debt Securities, Available-for-sale	(2,418,290)	(1,551,952)	(834,743)
Proceeds from calls, paydowns and maturities of securities held-to-maturity	34,563	41,736	18,062
Purchases of securities held-to-maturity	(1,000)	(30,250)	0
Proceeds from Maturities, Prepayments and Calls of Other Investments	42,403	29,526	0
Purchases of other investment securities	(11,474)	(28,659)	(12,120)
Net decrease (increase) in interest-bearing deposits with other banks	(194,506)	36,643	(19,210)
Proceeds from Sale of Loans Held-for-investment	141,072	0	0
Payments for (Proceeds from) Other Loans and Leases	(503,203)	714,594	409,557
Proceeds from Sale of Other Real Estate	1,278	2,076	1,453
Purchases of premises and equipment	(15,333)	(16,466)	(20,934)
Net cash acquired (paid) in business combinations	(109,024)	0	(51,663)
(Payments for) Proceeds from Branch Divestitures	0	0	(118)
Net cash provided by (used in) investing activities	(512,334)	(1,204,871)	(252,424)
Financing activities
Net (decrease) increase in total deposits	639,951	2,021,774	69,953
Net (decrease) increase in short-term borrowings	129,609	(1,149,587)	275,490
Payments on long-term borrowings	(463,382)	(681,511)	(159,653)
Proceeds from FHLBank Borrowings, Financing Activities	0	1,040,975	0
Cash dividends paid on common stock	(87,316)	(89,691)	(89,097)
Treasury stock purchase	(108,077)	(16,686)	(66,218)
Proceeds from exercise of stock options	64	72	90
Net cash provided by (used in) financing activities	110,849	1,125,346	30,565
Cash and due from banks
Net (decrease) increase in Cash and due from banks	(11,023)	30,363	(35,530)
Cash and due from banks at beginning of year	231,054	200,691	236,221
Cash and due from banks at end of year	220,031	231,054	200,691
Supplemental disclosures
Interest paid	32,841	75,884	121,779
Income taxes paid	17,689	32,579	27,497
Acquisition of other real estate owned through foreclosure	98	1,017	2,448
Issuance of restricted stock awards	12,231	9,370	10,488
Securities transferred from HTM to AFS	0	0	268,703
Common stock issued in bank acquisitions	10,000	0	60,934
us-gaap_OperatingLeaseRightOfUseAsset	0	0	60,249
us-gaap_OperatingLeaseLiability	0	0	65,799
Supplemental schedule for investing activities
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets, Net Of Purchase Consideration	62,916	0	(39,140)
Total liabilities assumed	125,894	0	18,380
Goodwill	$ 62,978	$ 0	$ 57,520

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Notes)	12 Months Ended
	Dec. 31, 2021
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 in both 2020 and 2021. 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 Unrealized gain (loss) on 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 $0.2 million and $0.3 million as of December 31, 2021 and 2020, respectively, is excluded by policy election from the estimate of credit losses. Allowance for credit losses - available-for-sale securities. For available-for-sale 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. 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 available-for-sale security is confirmed or when either of the criteria regarding intent or requirement to sell is met. Accrued interest receivable on available-for-sale debt securities, which totaled $14.9 million and $12.9 million as of December 31, 2021 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, the Bank 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. The R&S period, elected by the bank to be two years, 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. 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. Bank-owned life insurance. First Financial purchases and is the owner and beneficiary of the 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. Our quantitative impairment analysis utilized the 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 2020, First Financial engaged a third-party to perform a quantitative analysis of its goodwill to determine whether any impairment existed for its annual impairment test. This third-party quantitative analysis was performed due to the on-going economic market disruption, the movement of the Company’s stock price in relation to other bank indexes and the length of time that the market value of the reporting unit has been below its book value. This analysis indicated that no impairment existed as of the issue date. Additionally, in response to the COVID-19 pandemic and the related deterioration in general economic conditions, First Financial performed an interim qualitative impairment test as of the end of each quarter in 2020. Likewise, the results of these interim qualitative tests did not indicate that the Company's goodwill was impaired. Other intangible assets. Other intangible assets consist primarily of core deposit, customer list 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. 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). 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. These tax credits and other net tax benefits received are recognized as a component of income tax expense in the Consolidated Statements of Income and is evaluated for impairment at the end of each reporting period. 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 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 and Loans held for sale. The fair value of these agreements is recorded in the Consolidated Balance Sheets in Accrued interest and other assets. Stock-based compensation. First Financial grants stock-based awards, in

RECENTLY ADOPTED AND ISSUED ACC

RECENTLY ADOPTED AND ISSUED ACCOUNTING STANDARDS	12 Months Ended
	Dec. 31, 2021
Accounting Standards Update and Change in Accounting Principle [Abstract]
RECENTLY ADOPTED AND ISSUED ACCOUNTING STANDARDS	Accounting Standards Recently Adopted or Issued 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 Adopted in 2020 On January 1, 2020, the Company adopted ASU 2016-13 Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which replaced the previously required incurred loss methodology with an expected loss methodology that is referred to as the current expected credit loss (CECL) methodology. The measurement of expected credit losses under the CECL methodology is applicable to financial assets measured at amortized cost, including loan receivables and held-to-maturity debt securities. It also applies to off-balance sheet credit exposures not accounted for as insurance (loan commitments, standby letters of credit, financial guarantees, and other similar instruments) and net investments in leases recognized by a lessor in accordance with Topic 842 on leases. In addition, ASC 326 made changes to the accounting for available-for-sale debt securities. One such change is to require credit losses to be presented as an allowance rather than as a write-down on available-for-sale debt securities that management does not intend to sell or believes that it is more likely than not they will be required to sell. The Company adopted ASC 326 using the modified retrospective method for all financial assets measured at amortized cost and OBS credit exposures. Results for reporting periods beginning after January 1, 2020 are presented under ASC 326 while prior period amounts continue to be reported in accordance with previously applicable GAAP. The Company recorded a net decrease to retained earning s of $56.9 million as of January 1, 2020 for the cumulative effect of adopting ASC 326. As detailed in the following table, the transition adjustment included a $61.5 million increase to the ACL, a $12.2 million increase in the ACL for unfunded commitments and a $16.8 million decrease in Deferred tax liability. The Company adopted CECL using the prospective transition approach for financial assets purchased with credit deterioration that were previously classified as purchased credit impaired and accounted for under ASC 310-30. In accordance with the standard, First Financial did not reassess whether PCI assets met the definition of PCD assets as of the date of adoption. In March 2020, the OCC, the Board of Governors of the Federal Reserve System, and the FDIC announced an interim final rule to delay the estimated impact on regulatory capital stemming from the implementation of CECL. The interim final rule maintains the three-year transition option in the previous rule and provides banks the option to delay for two years an estimate of CECL’s effect on regulatory capital, relative to the incurred loss methodology’s effect on regulatory capital, followed by a three-year transition period. First Financial is adopting the capital transition relief over the five year permissible period. The impact of adopting ASC 326 was as follows: January 1, 2020 (dollars in thousands) As Reported under ASC 326 Pre-ASC 326 Impact of ASC 326 Adoption Assets Loans Commercial and industrial $ 28,485 $ 18,584 $ 9,901 Lease financing 1,089 971 118 Construction real estate 13,960 2,381 11,579 Commercial real estate 47,697 23,579 24,118 Residential real estate 10,789 5,299 5,490 Home equity 13,217 4,787 8,430 Installment 1,193 392 801 Credit card 2,725 1,657 1,068 Allowance for credit losses on loans $ 119,155 $ 57,650 $ 61,505 Liabilities Deferred tax liability $ 16,252 $ 33,030 $ (16,778) Allowance for credit losses on OBS credit exposures 12,740 585 12,155 For more information on the calculation of the ACL, please refer to Note 1 - Summary of Significant Accounting Policies and Note 5 - Allowance for Credit Losses .

RESTRICTIONS ON CASH AND DIVIDE

RESTRICTIONS ON CASH AND DIVIDENDS	12 Months Ended
	Dec. 31, 2021
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, 2021 and 2020, First Financial had $34.0 million and $38.0 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, 2021 and 2020. 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, 2021, First Financial's subsidiaries had retained earnings of $727.9 million, of which $166.2 million was available for distribution to First Financial without prior regulatory approval.

INVESTMENTS

INVESTMENTS	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
INVESTMENTS	Investment SecuritiesDuring 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. During the year ended December 31, 2019, proceeds on the sale of $519.1 million of AFS securities resulted in gains of $2.1 million and losses of $2.1 million. The impact to income tax expense from these sales was insignificant in all three years. In 2021 and 2020, t here were no reclassifications of HTM securities to AFS securities. However, in the first quarter of 2019, in addition to the sale of certain securities, First Financial reclassified $268.7 million of HTM securities to AFS in conjunction with the adoption of ASU 2017-12, resulting in a $0.2 million realized loss recorded in the Consolidated Statement of Income. 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, 2021 and December 31, 2020. 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 is a summary of HTM and AFS investment securities as of December 31, 2020: Held-to-maturity Available-for-sale (Dollars in thousands) Amortized Unrecognized Unrecognized Fair Amortized Unrealized Unrealized Fair U.S. Treasuries $ 0 $ 0 $ 0 $ 0 $ 99 $ 4 $ 0 $ 103 Securities of U.S. government agencies and corporations 0 0 0 0 60 0 0 60 Mortgage-backed securities - residential 13,990 197 0 14,187 704,482 15,938 (237) 720,183 Mortgage-backed securities - commercial 71,737 3,485 0 75,222 584,125 10,395 (3,584) 590,936 Collateralized mortgage obligations 5,799 79 0 5,878 634,418 21,148 (445) 655,121 Obligations of state and other political subdivisions 9,911 1,239 0 11,150 856,054 46,755 (291) 902,518 Asset-backed securities 0 0 0 0 478,539 4,158 (826) 481,871 Other securities 30,250 11 0 30,261 72,252 1,544 (8) 73,788 Total $ 131,687 $ 5,011 $ 0 $ 136,698 $ 3,330,029 $ 99,942 $ (5,391) $ 3,424,580 The following table provides a summary of investment securities by contractual maturity as of December 31, 2021, 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 $ 18,824 $ 18,910 Due after one year through five years 639 699 84,773 86,693 Due after five years through ten years 36,651 37,166 355,693 364,968 Due after ten years 2,886 2,917 846,405 863,927 Mortgage-backed securities - residential 0 0 728,050 724,137 Mortgage-backed securities - commercial 46,362 47,013 729,948 731,890 Collateralized mortgage obligations 11,882 12,103 696,258 697,740 Asset-backed securities 0 0 720,638 719,581 Total $ 98,420 $ 99,898 $ 4,180,589 $ 4,207,846 Unrealized gains and losses on debt securities are generally due to fluctuations in current market yields relative to the yields of the debt securities at their amortized cost. All securities with unrealized losses are reviewed quarterly to determine if any impairment exists, requiring a write-down to fair value through income. For 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 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. The Company recorded no reserves on investment securities for the twelve months ended December 31, 2021 or 2020. 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. As of December 31, 2020, the Company's investment securities portfolio consisted of 1,351 securities, of which 94 were in an unrealized loss position. Primarily all of First Financial’s HTM debt securities 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 non-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, 2021, however, there were $0.5 million of other HTM securities in a loss position as of December 31, 2021. There were no HTM securities on nonaccrual status, past due or in a loss position as of December 31, 2020. The Company did not record an allowance for credit losses for these securities as of December 31, 2021 or 2020. 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, 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) December 31, 2020 Less than 12 months 12 months or more Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasuries $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 Securities of U.S. Government agencies and corporations 0 0 0 0 0 0 Mortgage-backed securities - residential 57,872 (237) 0 0 57,872 (237) Mortgage-backed securities - commercial 169,825 (986) 48,158 (2,598) 217,983 (3,584) Collateralized mortgage obligations 49,161 (445) 1 0 49,162 (445) Obligations of state and other political subdivisions 60,008 (291) 0 0 60,008 (291) Asset-backed securities 84,749 (435) 68,967 (391) 153,716 (826) Other securities 4,992 (8) 0 0 4,992 (8) Total $ 426,607 $ (2,402) $ 117,126 $ (2,989) $ 543,733 $ (5,391) For further detail on the fair value of investment securities, see Note 22 – Fair Value Disclosures.

LOANS

LOANS	12 Months Ended
	Dec. 31, 2021
Loans [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, 2021, First Financial had $55.6 million in PPP loans, net of unearned fees of $2.6 million. As of December 31, 2020, First Financial had $594.6 million in PPP loans, net of unearned income of $13.7 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, 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 The following table sets forth the Company's loan portfolio at December 31, 2020 by risk attribute and origination date: (Dollars in thousands) 2020 2019 2018 2017 2016 Prior Term Total Revolving Total Commercial & industrial Pass $ 1,141,163 $ 460,210 $ 296,221 $ 208,077 $ 122,686 $ 138,307 $ 2,366,664 $ 502,286 $ 2,868,950 Special mention 24,668 10,281 18,118 6,893 6,668 6,090 72,718 10,470 83,188 Substandard 6,709 2,370 8,022 26,565 5,124 1,192 49,982 5,389 55,371 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 1,172,540 $ 472,861 $ 322,361 $ 241,535 $ 134,478 $ 145,589 $ 2,489,364 $ 518,145 $ 3,007,509 Lease financing Pass $ 22,916 $ 22,397 $ 12,942 $ 6,967 $ 4,802 $ 2,368 $ 72,392 $ 0 $ 72,392 Special mention 290 0 0 0 0 0 290 0 290 Substandard 5 0 0 180 120 0 305 0 305 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 23,211 $ 22,397 $ 12,942 $ 7,147 $ 4,922 $ 2,368 $ 72,987 $ 0 $ 72,987 Construction real estate Pass $ 96,410 $ 259,524 $ 182,625 $ 23,185 $ 24,786 $ 426 $ 586,956 $ 19,671 $ 606,627 Special mention 0 621 18,203 9,984 661 0 29,469 0 29,469 Substandard 0 0 0 0 0 0 0 0 0 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 96,410 $ 260,145 $ 200,828 $ 33,169 $ 25,447 $ 426 $ 616,425 $ 19,671 $ 636,096 Commercial real estate - investor Pass $ 515,950 $ 1,011,898 $ 427,077 $ 378,536 $ 286,587 $ 361,403 $ 2,981,451 $ 56,398 $ 3,037,849 Special mention 0 17,463 15,534 44,426 32,408 43,704 153,535 559 154,094 Substandard 6,198 2,043 22,497 7,067 68 14,724 52,597 0 52,597 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 522,148 $ 1,031,404 $ 465,108 $ 430,029 $ 319,063 $ 419,831 $ 3,187,583 $ 56,957 $ 3,244,540 Commercial real estate - owner Pass $ 185,692 $ 162,480 $ 147,236 $ 125,275 $ 128,755 $ 211,519 $ 960,957 $ 36,721 $ 997,678 Special mention 4,292 11,380 2,891 8,230 3,017 19,384 49,194 59 49,253 Substandard 668 504 7,054 5,496 306 2,321 16,349 38 16,387 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 190,652 $ 174,364 $ 157,181 $ 139,001 $ 132,078 $ 233,224 $ 1,026,500 $ 36,818 $ 1,063,318 Residential real estate Performing $ 290,277 $ 241,601 $ 115,747 $ 64,220 $ 60,094 $ 224,281 $ 996,220 $ 0 $ 996,220 Nonperforming 321 429 673 643 87 4,713 6,866 0 6,866 Total $ 290,598 $ 242,030 $ 116,420 $ 64,863 $ 60,181 $ 228,994 $ 1,003,086 $ 0 $ 1,003,086 Home equity Performing $ 60,967 $ 20,200 $ 17,445 $ 11,308 $ 9,744 $ 41,571 $ 161,235 $ 577,609 $ 738,844 Nonperforming 0 0 0 39 28 138 205 4,050 4,255 Total $ 60,967 $ 20,200 $ 17,445 $ 11,347 $ 9,772 $ 41,709 $ 161,440 $ 581,659 $ 743,099 Installment Performing $ 21,584 $ 15,614 $ 11,041 $ 8,812 $ 1,954 $ 3,185 $ 62,190 $ 19,479 $ 81,669 Nonperforming 15 53 23 35 17 36 179 2 181 Total $ 21,599 $ 15,667 $ 11,064 $ 8,847 $ 1,971 $ 3,221 $ 62,369 $ 19,481 $ 81,850 Credit cards Performing $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 47,845 $ 47,845 Nonperforming 0 0 0 0 0 0 0 640 640 Total $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 48,485 $ 48,485 Grand Total $ 2,378,125 $ 2,239,068 $ 1,303,349 $ 935,938 $ 687,912 $ 1,075,362 $ 8,619,754 $ 1,281,216 $ 9,900,970 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, 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 As of December 31, 2020 (Dollars in thousands) 30 - 59 60 - 89 > 90 days Total Current Total > 90 days Loans Commercial & industrial $ 6,532 $ 0 $ 1,861 $ 8,393 $ 2,999,116 $ 3,007,509 $ 0 Lease financing 0 0 0 0 72,987 72,987 0 Construction real estate 0 0 0 0 636,096 636,096 0 Commercial real estate-investor 136 0 24,422 24,558 3,219,982 3,244,540 0 Commercial real estate-owner 6,480 174 400 7,054 1,056,264 1,063,318 0 Residential real estate 2,809 370 3,687 6,866 996,220 1,003,086 0 Home equity 1,483 835 1,937 4,255 738,844 743,099 0 Installment 94 35 51 180 81,670 81,850 0 Credit card 303 163 174 640 47,845 48,485 169 Total $ 17,837 $ 1,577 $ 32,532 $ 51,946 $ 9,849,024 $ 9,900,970 $ 169 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. In accordance with the CARES Act, performing loans that demonstrated limited signs of credit deterioration, but were modified to provide borrowers relief during the COVID-19 pandemic were not considered to be TDR as of December 31, 2021 or 2020. 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 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 and the ACL included reserves of $8.8 million related to TDRs as of December 31, 2020. For the year ended December 31, 2020, First Financial charged off $1.7 million for the portion of TDRs determined to be uncollectible. Additionally, as of December 31, 2020, 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 157 TDRs totaling $30.0 million at December 31, 2019, including $11.4 million of loans on accrual status and $18.5 million of loans classified as nonaccrual. First Financial had $2.5 million of commitments outstanding to lend additional funds to borrowers whose loan terms had been modified through TDRs. Additionally, First Financial charged off $2.6 million for the portion of TDRs determined to be uncollectible for the year ended December 31, 2019. The following table provides information on loan modifications classified as TDRs during the years ended December 31, 2021, 2020 and 2019: Years ended December 31, 2021 2020 2019 (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 7 $ 9,311 $ 8,039 8 $ 14,984 $ 14,984 8 $ 25,009 $ 25,071 Construction 0 0 0 0 0 0 0 0 0 Commercial 8 16,850 9,807 0 0 0 9 3,024 2,932 Residential 17 1,585 1,553 24 1,953 1,847 30 3,415 3,062 Home equity 2 30 30 11 351 349 14 395 366 Installment 1 0 0 2 35 22 2 41 39 Total 35 $ 27,776 $ 19,429 45 $ 17,323 $ 17,202 63 $ 31,884 $ 31,470 The following table provides information on how TDRs were modified during the years ended December 31, 2021, 2020 and 2019: Years Ended December 31, (Dollars in thousands) 2021 2020 2019 Extended maturities $ 0 $ 0 $ 2,877 Adjusted interest rates 0 0 5,284 Combination of rate and maturity changes 0 0 516 Forbearance 7,328 4,759 20,320 Other (1) 12,101 12,443 2,473 Total $ 19,429 $ 17,202 $ 31,470 (1) Other includes covenant modifications and other concessions or combination of concessions that do not consist of interest rate adjustments, forbearance 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, 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. For the twelve months ended December 31, 2019, there were three TDRs with a balance of $7.0 million 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 earlier of 60 days after the date of termination of the National Emergency or January 1, 2022 are not required to be reported as a 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: 2021 2020 2019 (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 Total nonaccrual Nonaccrual loans (1) Commercial & industrial $ 11,077 $ 6,285 $ 17,362 $ 18,711 $ 10,519 $ 29,230 $ 24,346 Lease financing 0 203 203 0 0 0 223 Construction real estate 0 0 0 0 0 0 0 Commercial real estate 17,716 1,796 19,512 6,957 27,725 34,682 7,295 Residential real estate 0 8,305 8,305 251 11,350 11,601 10,892 Home equity 0 2,922 2,922 0 5,076 5,076 5,242 Installment 0 88 88 0 163 163 167 Total nonaccrual loans $ 28,793 $ 19,599 $ 48,392 $ 25,919 $ 54,833 $ 80,752 $ 48,165 Interest income effect 2021 2020 2019 Gross amount of interest that would have been recorded under original terms $ 5,132 $ 5,892 $ 5,813 Interest included in income Nonaccrual loans 1,618 1,636 1,042 Troubled debt restructurings 314 426 801 Total interest included in income 1,932 2,062 1,843 Net impact on interest income $ 3,200 $ 3,830 $ 3,970 Commitments outstanding to borrowers with nonaccrual loans $ 0 $ 0 $ 3 (1) Nonaccrual loans include nonaccrual TDRs of $16.0 million, $14.7 million and $18.5 million as of December 31, 2021, 2020 and 2019, 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. First Financial's investment in impaired loans was as follows: Year ended December 31, 2019 (Dollars in thousands) Average Interest Loans with no related allowance recorded Commercial & industrial $ 31,846 $ 926 Lease financing 168 0 Construction real estate 6 0 Commercial real estate 18,757 357 Residential real estate 15,915 307 Home equity 5,893 121 Installment 170 2 Total 72,755 1,713 Loans with an allowance recorded Commercial & industrial 4,721 87 Lease financing 57 0 Construction real estate 0 0 Commercial real estate 1,339 31 Residential real estate 446 12 Home equity 0 0 Installment 0 0 Total 6,563 130 Total Commercial & industrial 36,567 1,013 Lease financing 225 0 Construction real estate 6 0 Commercial real estate 20,096 388 Residential real estate 16,361 319 Home equity 5,893 121 Installment 170 2 Total $ 79,318 $ 1,843 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, 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 Leasing 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 13171000 $ 13,050 $ 6,973 $ 38 $ 11,729 $ 3,431 $ 48,392 December 31, 2020 Type of Collateral (Dollar in thousands) Business assets Commercial real estate Equipment Land Residential real estate Other Total Class of loan Commercial & industrial $ 30,961 $ 6,130 $ 2,608 $ 865 $ 0 $ 4,892 $ 45,456 Commercial real estate-investor 0 20,212 661 5,537 872 0 27,282 Commercial real estate-owner 5,842 3,495 0 42 344 0 9,723 Residential real estate 0 0 0 0 11,601 0 11,601 Home equity 0 0 0 0 5,076 0 5,076 Installment 0 0 0 0 0 163 163 Total $ 36,803 $ 29,837 $ 3,269 $ 6,444 $ 17,893 $ 5,055 $ 99,301 Lease financing. First Financial originates both sales-type and direct financing leases, and the Company manages and reviews lease residuals in accordance with its credit policies. 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 $42.3 million of financing leases, which were included in Loans and leases on the Consolidated Balance Sheets. For further detail on the acquisition, see Note 23 - Business Combinations. 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) 2021 2020 2019 Balance at beginning of year $ 1,287 $ 2,033 $ 1,401 Additions Commercial 98 510 415 Residential 0 507 2,033 Total additions 98 1,017 2,448 Disposals Commercial (947) (217) (541) Residential (331) (1,859) (912) Total disposals (1,278) (2,076) (1,453) Valuation adjustments Commercial (9) 448 (112) Residential 0 (135) (251) Total valuation adjustments (9) 313 (363) Balance at end of year $ 98 $ 1,287 $ 2,033

ALLOWANCE FOR CREDIT LOSSES

ALLOWANCE FOR CREDIT LOSSES	12 Months Ended
	Dec. 31, 2021
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 $29.5 million and $37.7 million as of December 31, 2021 and December 31, 2020, 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, which included consideration of the impact from both the COVID-19 pandemic and the related government stimulus response at the time. 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 related to the COVID-19 pandemic, 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, 2021, the ACL declined due to improvements in economic forecasts and the Company's improved credit outlook. Over the course of 2021, Moody's economic forecasts gradually improved as the economy showed significant signs of recovery from the beginning of the pandemic. The Company's improved credit outlook considered the impact from loan sales that addressed various portfolio concentrations, a significant decline in classified asset balances and relatively stable net charge-offs, excluding the impact from loan sales. For the twelve months ended, December 31, 2020, the ACL increased due to First Financial's adoption of ASC 326 and management's expectation of higher credit losses resulting from the COVID-19 pandemic. Changes in the allowance by loan category as of December 31 were as follows: 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 Balance at beginning of year $ 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 2019 (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 $ 18,746 $ 1,130 $ 3,413 $ 21,048 $ 4,964 $ 5,348 $ 362 $ 1,531 $ 56,542 Provision for credit losses 23,631 3 (1,100) 5,107 739 695 2 1,521 30,598 Gross charge-offs (26,676) (162) 0 (3,689) (677) (2,591) (223) (1,547) (35,565) Recoveries 2,883 0 68 1,113 273 1,335 251 152 6,075 Total net charge-offs (23,793) (162) 68 (2,576) (404) (1,256) 28 (1,395) (29,490) Ending allowance for credit losses $ 18,584 $ 971 $ 2,381 $ 23,579 $ 5,299 $ 4,787 $ 392 $ 1,657 $ 57,650 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. Prior to the adoption of ASC 326, First Financial maintained its reserve to absorb probable losses incurred in standby letters of credit and outstanding loan commitments. 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 ALLL methodology at the time. The ACL on unfunded commitments was $13.4 million as of December 31, 2021 and $12.5 million as of December 31, 2020. Due to the adoption of ASC 326, First Financial recorded $12.2 million in the ACL on unfunded commitments effective January 1, 2020. Additionally, First Financial recorded $0.9 million of provision expense related to the ACL on unfunded commitments for the twelve months ended December 31, 2021 and a provision recapture of $0.2 million for both December 31, 2020 and December 31, 2019.

PREMISES AND EQUIPMENT

PREMISES AND EQUIPMENT	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
PREMISES AND EQUIPMENT	Premises and Equipment Premises and equipment at December 31 were as follows: (Dollars in thousands) 2021 2020 Land and land improvements $ 49,402 $ 52,373 Buildings 155,337 161,371 Furniture and fixtures 70,847 70,177 Leasehold improvements 30,190 29,525 Construction in progress 8,145 8,434 313,921 321,880 Less: Accumulated depreciation and amortization 120,881 114,669 Total $ 193,040 $ 207,211 Depreciation expense recorded in 2021, 2020 and 2019 was $14.1 million, $15.4 million and $16.1 million, respectively.

LEASES

LEASES	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Lessee, Operating Leases	Leases - Lessees 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. First Financial is primarily the lessee in its leasing agreements, and substantially all of those agreements are for real estate property for branches, ATM locations and office space. On January 1, 2019, the Company adopted Topic 842 and all subsequent modifications. For First Financial, this adoption primarily affected the accounting treatment for operating lease agreements in which the Company is the lessee. Substantially all of the Company's leases are classified as operating leases, and therefore, were previously not recognized on the Company’s Consolidated Balance Sheets. With the adoption of Topic 842, operating lease agreements were required to be recognized on the Consolidated Balance Sheets as an 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 $57.2 million and $63.9 million at December 31, 2021 and 2020, respectively. Certain adjustments to the ROU asset may be required for items such as initial direct costs paid or incentives received. First Financial recorded a $ 67.6 million 71.7 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. For operating leases existing prior to January 1, 2019, the rate was based upon the remaining lease term as of that date. 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, 2021, 2020 and 2019 were as follows: (Dollars in thousands) December 31, 2021 December 31, 2020 December 31, 2019 Operating lease cost $ 7,425 $ 7,897 $ 7,324 Short-term lease cost 108 142 55 Variable lease cost 2,621 2,532 2,553 Total operating lease cost $ 10,154 $ 10,571 $ 9,932 Future minimum commitments due under these lease agreements as of December 31, 2021 are as follows: (Dollars in thousands) Operating leases 2022 $ 7,784 2023 7,683 2024 7,288 2025 6,673 2026 6,269 Thereafter 50,311 Total lease payments 86,008 Less imputed interest 18,456 Total $ 67,552 The weighted average lease term and discount rate for the Company's operating leases were as follows: December 31, 2021 December 31, 2020 December 31, 2019 Operating leases Weighted-average remaining lease term 13.9 years 15.1 years 15.6 years Weighted-average discount rate 3.25 % 3.07 % 3.43 % Supplemental cash information at year end related to leases was as follows: (Dollars in thousands) December 31, 2021 December 31, 2020 December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 6,860 $ 8,196 $ 7,335 ROU assets obtained in exchange for lease obligations Operating leases 6,076 9,725 64,902

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2021
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, 2021, 2020 and 2019 are shown below. (Dollars in thousands) 2021 2020 2019 Balance at beginning of year $ 937,771 $ 937,771 $ 880,251 Goodwill resulting from business combinations 62,978 0 57,520 Balance at end of year $ 1,000,749 $ 937,771 $ 937,771 In December 2021, First Financial recorded $63.0 million of goodwill resulting from the acquisition of Summit Funding Group, Inc. During 2019, First Financial recorded $57.5 million of goodwill resulting from the Bannockburn acquisition, in addition to its final adjustments to goodwill resulting from the MSFG merger. For further detail on various mergers or acquisitions, see Note 23 - 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, 2021 and no impairment was indicated. As of December 31, 2021, 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 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 6.2 years. First Financial recorded a $30.1 million 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 customer list intangible asset is being amortized on a straight-line basis over its estimated useful life of 12 years. Additionally, First Financial recorded a $39.4 million 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. The gross carrying amount and accumulated amortization of other intangible assets were as follows: (Dollars in thousands) December 31, 2021 December 31, 2020 Amortized intangible assets Core deposit intangibles $ 45,256 $ (26,911) $ 51,031 $ (27,524) Customer list 69,563 (8,362) 39,420 (4,778) Other 14,589 (5,237) 10,113 (3,710) Total $ 129,408 $ (40,510) $ 100,564 $ (36,012) Amortization expense recognized on intangible assets for 2021, 2020 and 2019 was $9.8 million, $11.1 million and $9.7 million, respectively. The estimated amortization expense of intangible assets for the next five years is as follows: (Dollars in thousands) Intangible amortization 2022 $ 11,515 2023 10,536 2024 9,193 2025 9,145 2026 9,092

DEPOSITS

DEPOSITS	12 Months Ended
	Dec. 31, 2021
Deposits [Abstract]
Deposit Liabilities Disclosures [Text Block]	Deposits Time deposits that meet or exceed the FDIC insurance limit of $250,000 at December 31, 2021 and 2020 were $195.6 million and $220.5 million, respectively. Scheduled maturities of all time deposits for the next five years were as follows: (Dollars in thousands) Time deposits 2022 $ 1,131,574 2023 83,589 2024 50,983 2025 32,569 2026 31,352 Thereafter 196 Total $ 1,330,263

BORROWINGS

BORROWINGS	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
BORROWINGS	Borrowings Short-term borrowings 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. 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. The following is a summary of short-term borrowings for the last three years: 2021 2020 2019 (Dollars in thousands) Amount Rate Amount Rate Amount Rate At December 31, Federal funds purchased and securities sold under agreements to repurchase $ 51,203 0.01 % $ 166,594 0.05 % $ 165,181 0.85 % FHLB borrowings 225,000 0.18 % 0 0.00 % 1,151,000 1.73 % Other short-term borrowings 20,000 1.90 % 0 0.00 % 0 0.00 % Total $ 296,203 0.27 % $ 166,594 0.05 % $ 1,316,181 1.62 % Average for the year Federal funds purchased and securities sold under agreements to repurchase $ 160,967 0.07 % $ 149,036 0.26 % $ 155,859 1.15 % FHLB borrowings 43,371 0.20 % 441,867 1.37 % 990,860 2.37 % Other short-term borrowings 165 1.92 % 0 0.00 % 0 0.00 % Total $ 204,503 0.10 % $ 590,903 1.09 % $ 1,146,719 1.90 % Securities sold under agreements to repurchase are secured by securities with a carrying amount of $51.3 million and $126.7 million, as of December 31, 2021 and 2020, respectively. The following shows the remaining contractual maturity of repurchase agreements by collateral pledged: (Dollars in thousands) Overnight and Continuous Repurchase agreements Mortgage-backed securities $ 48,370 Collateralized mortgage obligations 2,833 Total $ 51,203 First Financial had outstanding FHLB advances included in short-term borrowings of $225.0 million as of December 31, 2021 and no outstanding short-term FHLB advances as of December 31, 2020. First Financial also has a $40.0 million short-term credit facility with an unaffiliated bank that matures in December, 2022, 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, 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, 2021. 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: 2021 2020 (Dollars in thousands) Amount Average Rate Amount Average Rate FRB borrowings $ 0 0.00 % $ 434,982 0.35 % FHLB borrowings 0 0.00 % 19,971 1.43 % Subordinated debt 313,248 4.86 % 321,384 4.86 % Unamortized debt issuance costs (2,384) n/a (2,770) n/a Capital lease liability 1,781 3.81 % 1,860 3.81 % Capital loan with municipality 775 0.00 % 775 0.00 % Subtotal 313,420 4.88 % 776,202 2.25 % Acquired in Summit acquisition Bank lines of credit 23,030 2.77 % 0 0.00 % Notes issued in conjunction with acquisition of property and equipment 73,382 4.09 % 0 0.00 % Total notes payable acquired in Summit acquisition 96,412 3.77 % 0 0.00 % Total long-term debt $ 409,832 4.62 % $ 776,202 2.25 % As of December 31, 2021, First Financial's long-term debt matures as follows: (Dollars in thousands) Long-term debt 2022 $ 28,091 2023 15,086 2024 23,091 2025 12,301 2026 16,765 Thereafter 314,498 Total $ 409,832 First Financial participated in the PPPLF, which is a program created by the FRB to extend credit to eligible financial institutions that originate PPP loans. As of December 31, 2021, the bank had no outstanding PPPLF advances. As of December 31, 2020, the bank had oustanding PPPLF advances of $435.0 million with an average interest rate of 35 basis points. These borrowings were secured by pledged PPP loans and prepay in conjunction with reductions in the principal balances of those loans. 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%. Additionally, acquired long term borrowings included $73.4 million of term notes, both with and without recourse, with an average interest rate of 4.09%. These term notes were used to finance Summit's equity investment in the purchase of equipment to be leased to customers. FHLB advances, both short-term and long-term, must be collateralized with qualifying assets, typically certain commercial and residential real estate loans, as well as certain government and agency securities. For ease of borrowing execution, First Financial utilizes a blanket collateral agreement with the FHLB, and at December 31, 2021, had collateral pledged with a book value of $5.8 billion.

DERIVATIVES

DERIVATIVES	12 Months Ended
	Dec. 31, 2021
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, 2021, for interest rate derivatives, the Company had a total counterparty notional amount outstanding of $2.4 billion, spread among six counterparties, with an estimated fair value of $74.2 million. At December 31, 2020, the Company had interest rate derivatives with a total counterparty notional amount outstanding of $2.3 billion, spread among twenty counterparties, with an estimated fair value of $182.3 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. The Company has risk limits and internal controls in place to help ensure excessive risk is not being taken in providing this service to customers. At December 31, 2021, the Company had total counterparty notional amount outstanding of $6.4 billion spread among four counterparties, with an estimated fair value of $15.2 million at December 31, 2021 related to foreign exchange contracts, which is included in Accrued interest and other liabilities in the Consolidated Balance Sheets. At December 31, 2020, the Company had total counterparty notional amounts outstanding of $3.6 billion spread among six counterparties, with an estimated fair value of $33.1 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, 2021 December 31, 2020 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 $ 2,430,587 $ 84,694 $ (7,508) $ 2,300,336 $ 184,777 $ (107) Matched interest rate swaps with counterparty Accrued interest and other liabilities 2,430,587 7,508 (84,701) 2,300,336 107 (184,884) Foreign exchange contracts Matched foreign exchange contracts with customers Accrued interest and other assets 6,423,085 67,988 (52,780) 3,637,509 60,366 (27,249) Match foreign exchange contracts with counterparty Accrued interest and other liabilities 6,399,432 52,780 (67,988) 3,637,509 27,249 (60,366) Total $ 17,683,691 $ 212,970 $ (212,977) $ 11,875,690 $ 272,499 $ (272,606) The following table discloses the gross and net amounts of client derivatives and foreign exchange contracts recognized in the Consolidated Balance Sheets: December 31, 2021 December 31, 2020 (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 $ 92,209 $ (149,647) $ (57,438) $ 184,991 $ (385,088) $ (200,097) Foreign exchange contracts with counterparty 120,768 (56,443) 64,325 87,615 (17,392) 70,223 Total $ 212,977 $ (206,090) $ 6,887 $ 272,606 $ (402,480) $ (129,874) 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, 2021: (Dollars in thousands) Notional Average Fair Client derivatives-interest rate contracts Receive fixed, matched interest rate swaps with borrower $ 2,430,587 5.7 $ 77,186 Pay fixed, matched interest rate swaps with counterparty 2,430,587 5.7 (77,193) Client derivatives-foreign exchange contracts Foreign exchange contracts - pay USD 6,423,085 0.6 15,208 Foreign exchange contracts - receive USD 6,399,432 0.6 (15,208) Total client derivatives $ 17,683,691 2.0 $ (7) 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 $362.8 million as of December 31, 2021 and $242.4 million as of December 31, 2020. The fair value of these agreements were recorded in Accrued interest and other liabilities on the Consolidated Balance Sheets was $0.1 million at December 31, 2021 and $0.3 million at December 31, 2020. 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, 2021, the notional amount of the IRLCs was $45.0 million and the notional amount of forward commitments was $62.5 million. As of December 31, 2020, the notional amount of IRLCs was $114.2 million and the notional amount of forward commitments was $112.6 million. The fair value of these agreements was $3.3 million at December 31, 2021 and was $2.7 million at December 31, 2020 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, 2021
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) 2021 Beginning balance $ 5,097 Additions 1,463 Deductions (3,078) Ending balance $ 3,482 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, 2021
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 was represented by the contractual amounts of those instruments. Effective January 1, 2020, First Financial adopted ASC 326, at which time First Financial estimated 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 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 $13.4 million and $12.5 million of reserves for unfunded commitments recorded in Accrued interest and other liabilities on the Consolidated Balance Sheets as of December 31, 2021 and 2020. 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 $4.0 billion and $3.4 billion at December 31, 2021 and 2020, respectively. As of December 31, 2021, loan commitments with a fixed interest rate totaled $129.2 million while commitments with variable interest rates totaled $3.8 billion. At December 31, 2020, loan commitments with a fixed interest rate totaled $123.6 million while commitments with variable interest rates totaled $3.3 billion. The fixed rate loan commitments have interest rates ranging from 0.00% to 21.00% for both December 31, 2021 and 2020 and have maturities ranging from less than 1 year to 30.9 years for December 31, 2021 and less than 1 year to 30.8 years for December 31, 2020. The following table presents by type First Financial's loan balances and contractual obligations to extend credit: December 31, 2021 December 31, 2020 (dollars in thousands) Unfunded commitment Loan balance Unfunded commitment Loan balance Commercial & industrial $ 1,545,995 $ 2,720,028 $ 1,270,765 $ 3,007,509 Lease financing 18,037 109,624 0 72,987 Construction real estate 484,038 455,894 374,008 636,096 Commercial real estate-investor 65,660 3,154,755 139,754 3,244,540 Commercial real estate-owner 29,824 1,071,859 51,637 1,063,318 Residential real estate 50,043 896,069 28,895 1,003,086 Home equity 822,343 708,399 762,406 743,099 Installment 15,985 119,454 18,229 81,850 Credit card 217,006 52,217 207,365 48,485 Total $ 3,248,931 $ 9,288,299 $ 2,853,059 $ 9,900,970 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 $41.1 million and $36.1 million at December 31, 2021, and 2020, 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 $362.8 million and $242.4 million at December 31, 2021 and 2020, 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, 2021 , 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, 2021 December 31, 2020 Investment Accounting Method Investment Unfunded commitment Investment Unfunded commitment LIHTC Proportional amortization $ 108,974 $ 57,341 $ 90,401 $ 47,531 HTC Equity 2,581 56 3,607 364 NMTC Equity 3,895 0 1,165 0 Renewable energy Equity 18,585 15,114 5,244 7,661 Total $ 134,035 $ 72,511 $ 100,417 $ 55,556 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, 2021 December 31, 2020 December 31, 2019 (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 $ 8,894 $ (8,581) $ 8,076 $ (7,629) $ 6,931 $ (6,397) HTC 1,116 (263) 474 (563) 2,862 (3,342) NMTC 210 (210) 175 (175) 350 (350) Renewable energy 11,467 (12,216) 4,756 (4,777) 0 0 Total $ 21,687 $ (21,270) $ 13,481 $ (13,144) $ 10,143 $ (10,089) (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 are being 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 statement of income. 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, 2021. 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, 2021 or December 31, 2020.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
INCOME TAXES	Income Taxes Income tax expense consisted of the following components: (Dollars in thousands) 2021 2020 2019 Current expense Federal $ 21,397 $ 34,632 $ 31,343 State 2,289 2,349 854 Total current expense 23,686 36,981 32,197 Deferred expense (benefit) Federal 10,944 (8,624) 10,946 State 1,143 244 1,644 Total deferred expense (benefit) 12,087 (8,380) 12,590 Income tax expense $ 35,773 $ 28,601 $ 44,787 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) 2021 2020 2019 Income taxes computed at federal statutory rate (21%) on income before income taxes $ 50,596 $ 38,726 $ 51,001 Benefit from tax-exempt income (5,613) (5,901) (5,964) Tax credits (21,561) (13,064) (10,075) Basis reduction on tax credit 1,346 657 738 Tax expense (benefit) of equity compensation (243) 340 (140) State income taxes, net of federal tax benefit 2,711 2,049 1,973 Affordable housing investments 7,194 6,635 5,825 Other 1,343 (841) 1,429 Income tax expense $ 35,773 $ 28,601 $ 44,787 The major components of the temporary differences that gave rise to deferred tax assets and liabilities at December 31, 2021, and 2020, were as follows: (Dollars in thousands) 2021 2020 Deferred tax assets Allowance for credit losses $ 29,754 $ 39,671 Fair value adjustments on business combinations 0 3,870 Deferred compensation 292 235 Postretirement benefits other than pension liability 652 684 Accrued stock-based compensation 1,836 1,654 OREO write-downs 0 8 Interest on nonaccrual loans 442 1,712 Accrued expenses 7,286 5,647 State net operating loss 1,746 1,959 Leasing liability 15,794 16,947 Reserve for unfunded commitments 3,049 2,854 Deferred loan fees and costs 0 1,691 Other 565 577 Total deferred tax assets 61,416 77,509 Deferred tax liabilities Tax depreciation in excess of book depreciation (9,117) (11,923) FHLB and FRB stock (3,836) (4,043) Mortgage-servicing rights (3,518) (2,925) Leasing activities (10,860) (6,661) Retirement obligation (13,754) (10,984) Intangible assets (16,081) (13,942) Deferred loan fees and costs (933) 0 Prepaid expenses (680) (619) Limited partnership investments (2,957) (2,471) Fair value adjustments on business combinations (6,900) 0 Net unrealized gains on investment securities (5,791) (20,253) Foreign exchange deferred income (428) (2,080) ASU 2016-01 unrealized gain/loss-equity securities (2,339) (2,179) Right of use assets (13,390) (15,053) Other (2,426) (2,035) Total deferred tax liabilities (93,010) (95,168) Total net deferred tax liability $ (31,594) $ (17,659) At December 31, 2021 and 2020, the Company had a state net operating loss carryforward from MSFG of $2.3 million and $2.5 million. This carryforward begins to expire in 2025. The Company expects to fully utilize this net operating loss and, therefore, a valuation allowance was not required at December 31, 2021 and 2020. 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, 2021 and 2020. The Bank’s retained earnings at December 31, 2021 and 2020 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 both December 31, 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, 2021 and 2020 is as follows: (Dollars in thousands) 2021 2020 Balance at beginning of year $ 2,386 $ 3,006 Settlements 0 (620) Balance at end of year $ 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, 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 2018 have been closed and are no longer subject to U.S. federal income tax examinations. Tax years 2018 through 2021 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 2017.

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS	12 Months Ended
	Dec. 31, 2021
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 $3.4 million for 2021, $2.5 million for 2020 and $1.0 million for 2019. 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 2021, 2020 or 2019 and does not expect to make any contributions in 2022. 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) 2021 2020 Change in benefit obligation Benefit obligation at beginning of year $ 87,494 $ 75,044 Service cost 9,128 7,932 Interest cost 2,157 2,455 Actuarial (gain) loss 2,588 9,171 Benefits paid, excluding settlement (8,096) (7,108) Benefit obligation at end of year 93,271 87,494 Change in plan assets Fair value of plan assets at beginning of year 155,704 141,816 Actual return on plan assets 15,774 20,996 Benefits paid, excluding settlement (8,096) (7,108) Fair value of plan assets at end of year 163,382 155,704 Amounts recognized in the Consolidated Balance Sheets Assets 70,111 68,210 Liabilities 0 0 Net amount recognized $ 70,111 $ 68,210 Amounts recognized in accumulated other comprehensive income (loss) Net actuarial loss $ 27,264 $ 32,943 Net prior service cost (270) (682) Deferred tax assets (6,148) (7,349) Net amount recognized $ 20,846 $ 24,912 Change in accumulated other comprehensive income (loss) $ (4,066) $ (3,029) Accumulated benefit obligation $ 92,316 $ 86,327 The change in the defined benefit obligations for the period was driven primarily by an update to the interest crediting rate to reflect the known rate used at year-end 2021, which increased the liability, partially offset by a 34 bp increase in the discount rate from the prior year. The components of net periodic benefit cost are shown in the table that follows: December 31, (Dollars in thousands) 2021 2020 2019 Service cost $ 9,128 $ 7,932 $ 6,591 Interest cost 2,157 2,455 2,778 Expected return on assets (10,118) (9,824) (9,718) Amortization of prior service cost (413) (413) (413) Recognized net actuarial loss 2,611 2,334 1,803 Net periodic benefit (income) cost 3,365 2,484 1,041 Other changes recognized in accumulated other comprehensive income (loss) Net actuarial (gain) loss (3,068) (2,001) (4,630) Prior service cost 0 0 0 Amortization of prior service cost 413 413 413 Amortization of gain (2,611) (2,334) (1,803) Total recognized in accumulated other comprehensive income (loss) (5,266) (3,922) (6,020) Total recognized in net periodic benefit cost and accumulated other comprehensive income (loss) $ (1,901) $ (1,438) $ (4,979) The pension plan assumptions are shown in the table that follows: December 31, 2021 2020 2019 Benefit obligations Discount rate 2.89 % 2.55 % 3.33 % Rate of compensation increase 3.50 % 3.50 % 3.50 % Weighted average interest crediting rate 2.58 % 2.14 % 2.82 % Net periodic benefit cost Discount rate 2.55 % 3.33 % 4.31 % 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 2.14 % 2.82 % 3.61 % 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 Other assets 13,199 0 13,199 0 Total $ 163,382 $ 146,648 $ 16,734 $ 0 The fair value of the plan assets as of December 31, 2020 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 $ 129 $ 129 $ 0 $ 0 U. S. Government agencies 4,193 0 4,193 0 Fixed income mutual funds 65,443 65,443 0 0 Equity mutual funds 85,939 85,939 0 0 Total $ 155,704 $ 151,511 $ 4,193 $ 0 The level within the fair value hierarchy is based on the lowest level of input that is significant in the fair value measurement. See Note 22 – 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 2022 $ 5,753 2023 5,848 2024 6,664 2025 6,931 2026 7,099 Thereafter 41,728

REVENUE RECOGNITION

REVENUE RECOGNITION	12 Months Ended
	Dec. 31, 2021
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 2019-09 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 2021 was $27.9 million, and was partially offset by $13.6 million of expenses within Noninterest income. Gross interchange income for 2020 was $23.9 million, and was partially offset by $12.2 million of expenses within Noninterest income, while gross interchange income for 2019 was $30.4 million, and was partially offset by $11.9 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 point in 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, 2021 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 $ (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 December 31, 2019 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 Cumulative effect of new standard Ending Balance Unrealized gain (loss) on debt securities $ 65,858 $ (370) $ 66,228 $ (14,269) $ 51,959 $ (11,601) $ 51,959 $ 906 $ 41,264 Unrealized gain (loss) on derivatives 281 0 281 (64) 217 (217) 217 0 0 Retirement obligation 4,630 (1,390) 6,020 (1,371) 4,649 (32,590) 4,649 0 (27,941) Total $ 70,769 $ (1,760) $ 72,529 $ (15,704) $ 56,825 $ (44,408) $ 56,825 $ 906 $ 13,323 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) 2021 2020 2019 Affected Line Item in the Consolidated Statements of Income Realized gains and losses on securities available-for-sale $ (759) $ (4,563) $ (370) Net gain (loss) on sales of investment securities Defined benefit pension plan Amortization of prior service cost (2) 413 413 413 Other noninterest expense Recognized net actuarial loss (2) (2,611) (2,334) (1,803) Other noninterest expense Amortization and settlement charges of defined benefit pension items (2,198) (1,921) (1,390) Total reclassifications for the period, before tax $ (2,957) $ (6,484) $ (1,760) (1) Negative amounts are debits to profit/loss. (2) Included in the computation of net periodic pension cost (see Note 16 - Employee Benefit Plans for additional details).

CAPITAL

CAPITAL	12 Months Ended
	Dec. 31, 2021
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, 2021, 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 $419.8 million on a consolidated basis at December 31, 2021. The following tables present the actual and required capital amounts and ratios as of December 31, 2021 and 2020 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, 2021 Common equity tier 1 capital to risk-weighted assets Consolidated $ 1,262,789 10.84 % $ 815,197 7.00 % N/A N/A First Financial Bank 1,513,175 13.01 % 813,974 7.00 % $ 755,833 6.50 % Tier 1 capital to risk-weighted assets Consolidated 1,306,571 11.22 % 989,882 8.50 % N/A N/A First Financial Bank 1,513,708 13.02 % 988,397 8.50 % 930,256 8.00 % Total capital to risk-weighted assets Consolidated 1,642,549 14.10 % 1,222,795 10.50 % N/A N/A First Financial Bank 1,589,570 13.67 % 1,220,960 10.50 % 1,162,820 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 % Actual Minimum capital PCA requirement to be (Dollars in thousands) Capital Ratio Capital Ratio Capital Ratio December 31, 2020 Common equity tier 1 capital to risk-weighted assets Consolidated $ 1,325,922 11.82 % $ 785,338 7.00 % N/A N/A First Financial Bank 1,452,403 12.95 % 784,807 7.00 % $ 728,749 6.50 % Tier 1 capital to risk-weighted assets Consolidated 1,368,818 12.20 % 953,625 8.50 % N/A N/A First Financial Bank 1,452,507 12.96 % 952,980 8.50 % 896,922 8.00 % Total capital to risk-weighted assets Consolidated 1,744,802 15.55 % 1,178,007 10.50 % N/A N/A First Financial Bank 1,560,457 13.92 % 1,177,211 10.50 % 1,121,153 10.00 % Leverage Consolidated 1,368,818 9.55 % 573,526 4.00 % N/A N/A First Financial Bank 1,452,507 10.14 % 573,094 4.00 % 716,367 5.00 % Share repurchases. Effective January 2022, First Financial's board of directors approved a stock repurchase plan (the 2021 Repurchase Plan), replacing the 2020 Repurchase Plan which became effective in January 2021 (the 2020 Repurchase Plan). The 2021 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. Under the 2020 Repurchase Plan, First Financial repurchased 4,633,355 shares at an average market price of $23.33 during 2021.

STOCK OPTIONS AND AWARDS

STOCK OPTIONS AND AWARDS	12 Months Ended
	Dec. 31, 2021
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 $9.6 million, $7.7 million and $8.0 million for the years ended December 31, 2021, 2020 and 2019, respectively, related to stock options and restricted stock awards. Total unrecognized compensation cost related to non-vested share-based compensation was $10.2 million at December 31, 2021 and is expected to be recognized over a weighted average period of 1.93 years. As of December 31, 2021, 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, 2021, there were 3,803,798 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, 2021, 20,515 options were outstanding under the Plan, all of which expire on or before February 3, 2024. 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 2021, 2020 or 2019. Stock option activity for the year ended December 31, 2021, 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 27,451 $ 10.53 Granted 0 0.00 Exercised (6,936) 9.21 Forfeited or expired 0 0.00 Outstanding at end of year 20,515 $ 10.98 1.78 years $ 275 Exercisable at end of year 20,515 $ 10.98 1.78 years $ 275 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. 2021 2020 2019 Total intrinsic value of options exercised $ 114 $ 86 $ 462 Cash received from exercises $ 64 $ 72 $ 90 Tax benefit from exercises $ 2,229 $ 1,776 $ 1,844 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: 2021 2020 2019 Number of shares Weighted Number of shares Weighted Number of shares Weighted Nonvested at beginning of year 763,283 $ 22.04 530,569 $ 27.19 462,446 $ 26.39 Granted 539,020 22.69 503,311 18.62 395,023 26.55 Vested (386,848) 22.24 (233,828) 26.07 (295,633) 24.94 Forfeited (75,722) 22.86 (36,769) 23.79 (31,267) 28.63 Nonvested at end of year 839,733 $ 22.30 763,283 $ 22.04 530,569 $ 27.19 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 2021, 2020 and 2019 was $8.6 million, $6.1 million and $7.4 million, respectively.

EARNINGS PER COMMON SHARE

EARNINGS PER COMMON SHARE	12 Months Ended
	Dec. 31, 2021
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) 2021 2020 2019 Numerator Net income $ 205,160 $ 155,810 $ 198,075 Denominator Basic earnings per common share - weighted average shares 95,034,690 97,363,952 98,305,570 Effect of dilutive securities Employee stock awards 862,695 729,146 545,901 Diluted earnings per common share - adjusted weighted average shares 95,897,385 98,093,098 98,851,471 Earnings per share available to common shareholders Basic $ 2.16 $ 1.60 $ 2.01 Diluted $ 2.14 $ 1.59 $ 2.00 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, 2021, 2020, or 2019.

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, 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 Carrying Estimated Fair Value (Dollars in thousands) Value Total Level 1 Level 2 Level 3 December 31, 2020 Financial assets Cash and short-term investments $ 251,359 $ 251,359 $ 251,359 $ 0 $ 0 Investment securities held-to-maturity 131,687 136,698 0 136,698 0 Other investments 133,198 133,198 837 122,953 9,408 Loans and leases 9,725,291 9,743,497 0 0 9,743,497 Accrued interest receivable 50,903 50,903 0 13,221 37,682 Financial liabilities Deposits 12,232,003 12,238,058 0 12,238,058 0 Short-term borrowings 166,594 166,594 166,594 0 0 Long-term debt 776,202 774,674 0 774,674 0 Accrued interest payable 6,240 6,240 14 6,226 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 a Level 2 measurement. 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 $28.8 million and $45.3 million at December 31, 2021 and December 31, 2020, respectively, with a valuation allowance of $9.7 million and $13.5 million at December 31, 2021 and December 31, 2020, 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, 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 Measurements Using Assets/Liabilities (Dollars in thousands) Level 1 Level 2 Level 3 at Fair Value December 31, 2020 Assets Investment securities available-for-sale $ 103 $ 3,383,902 $ 40,575 $ 3,424,580 Loans held for sale 0 41,103 0 41,103 Interest rate derivative contracts 0 185,032 0 185,032 Foreign exchange derivative contracts 0 87,615 0 87,615 Total $ 103 $ 3,697,652 $ 40,575 $ 3,738,330 Liabilities Interest rate derivative contracts $ 0 $ 186,124 $ 0 $ 186,124 Foreign exchange derivative contracts 0 87,615 0 87,615 Total $ 0 $ 273,739 $ 0 $ 273,739 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, 2021 and 2020. (dollars in thousands) December 31, 2021 December 31, 2020 Beginning balance $ 40,575 $ 9,190 Accretion (amortization) (38) 1 Increase (decrease) in fair value 44 (17) Purchases (settlements) (2,400) 31,401 Ending balance $ 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, 2021 Assets Collateral dependent loans Commercial $ 0 $ 0 $ 4,449 Commercial real estate 0 0 14,618 OREO 0 0 0 Fair Value Measurements Using (Dollars in thousands) Level 1 Level 2 Level 3 December 31, 2020 Assets Collateral dependent loans Commercial $ 0 $ 0 $ 25,367 Commercial real estate 0 0 6,432 OREO 0 0 54

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	12 Months Ended
	Dec. 31, 2021
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. 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 $2.6 million during the year ended December 31, 2021. 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 $125.9 million, respectively, and included $42.3 million of financing leases and $73.9 million of operating leases. Given the timing of the transaction closing, acquisition accounting adjustments are considered preliminary at December 31, 2021. These present value measurements are 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, and the measurement period ends in December 2022. Goodwill arising from the Summit acquisition was $63.0 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 9 – Goodwill and Other Intangible Assets. In August, 2019, the Company completed its acquisition of Bannockburn Global Forex, LLC. Pursuant to the acquisition agreement, First Financial agreed to acquire all of the issued and outstanding membership interests of BGF for aggregate consideration of approximately $114.6 million consisting of $53.7 million in cash and $60.9 million of First Financial common stock. BGF was a privately held capital markets trading firm specializing in foreign currency advisory, hedge analytics and transaction processing for closely held enterprises. Upon completion of the transaction, Bannockburn became a division of the Bank, but continues to operate as Bannockburn Global Forex, taking advantage of its existing brand recognition within the foreign exchange industry.

FIRST FINANCIAL BANCORP. (PAREN

FIRST FINANCIAL BANCORP. (PARENT COMPANY ONLY) FINANCIAL INFORMATION	12 Months Ended
	Dec. 31, 2021
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) 2021 2020 Assets Cash $ 49,746 $ 172,902 Investment securities 1,836 1,388 Subordinated notes from subsidiaries 7,500 7,500 Investment in subsidiaries Commercial bank 2,447,095 2,346,009 Non-banks 10,417 9,559 Total investment in subsidiaries 2,457,512 2,355,568 Premises and equipment 1,311 1,328 Other assets 77,132 68,812 Total assets $ 2,595,037 $ 2,607,498 Liabilities Short-term borrowings $ 20,000 $ 0 Subordinated notes 310,864 320,615 Dividends payable 1,042 674 Other liabilities 4,189 4,139 Total liabilities 336,095 325,428 Shareholders’ equity 2,258,942 2,282,070 Total liabilities and shareholders’ equity $ 2,595,037 $ 2,607,498 Statements of Income and Comprehensive Income Years Ended December 31, (Dollars in thousands) 2021 2020 2019 Income Interest income $ 34 $ 27 $ 30 Noninterest income 663 272 191 Dividends from subsidiaries 202,000 81,725 196,800 Total income 202,697 82,024 197,021 Expenses Interest expense 15,900 14,172 9,552 Salaries and employee benefits 9,784 8,004 8,169 Professional services 2,343 1,160 1,040 Other 5,186 5,163 6,599 Total expenses 33,213 28,499 25,360 Income before income taxes and equity in undistributed net earnings of subsidiaries 169,484 53,525 171,661 Income tax expense (benefit) (7,787) (6,145) (5,975) Equity in undistributed earnings (loss) of subsidiaries 27,889 96,140 20,439 Net income $ 205,160 $ 155,810 $ 198,075 Comprehensive income $ 156,063 $ 191,151 $ 254,900 Statements of Cash Flows Years Ended December 31, (Dollars in thousands) 2021 2020 2019 Operating activities Net income $ 205,160 $ 155,810 $ 198,075 Adjustments to reconcile net income to net cash provided by operating activities Equity in undistributed (earnings) loss of subsidiaries (27,889) (96,140) (20,439) Depreciation and amortization 859 712 584 Stock-based compensation expense 9,635 7,678 7,969 Unrealized (gain) loss on equity securities (448) (272) (191) Deferred income taxes (224) (158) 1,255 (Decrease) increase in dividends payable 368 (175) 384 (Decrease) increase in other liabilities (751) (22) (244) Decrease (increase) in other assets (8,096) 8,907 (6,996) Net cash provided by (used in) operating activities 178,614 76,340 180,397 Investing activities Capital contributions to subsidiaries (113,152) 0 0 Net cash acquired (paid) in business combinations 0 0 (53,660) Proceeds from sales and maturities of investment securities 0 0 264 Purchases of investment securities 0 0 (500) Net cash (used in) provided by investing activities (113,152) 0 (53,896) Financing activities (Decrease) increase in short-term borrowings 20,000 0 0 Proceeds from long-term borrowings (10,592) 150,000 0 Cash dividends paid on common stock (87,316) (89,691) (89,097) Purchases of common stock (108,077) (16,686) (66,218) Proceeds from exercise of stock options, net of shares purchased 64 72 90 Other (2,697) (3,002) (2,285) Net cash provided by (used in) financing activities (188,618) 40,693 (157,510) Net increase (decrease) in cash (123,156) 117,033 (31,009) Cash at beginning of year 172,902 55,869 86,878 Cash at end of year $ 49,746 $ 172,902 $ 55,869

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2021
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 in both 2020 and 2021. 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 Unrealized gain (loss) on 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 $0.2 million and $0.3 million as of December 31, 2021 and 2020, respectively, is excluded by policy election from the estimate of credit losses. Allowance for credit losses - available-for-sale securities. For available-for-sale 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. 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 available-for-sale security is confirmed or when either of the criteria regarding intent or requirement to sell is met. Accrued interest receivable on available-for-sale debt securities, which totaled $14.9 million and $12.9 million as of December 31, 2021 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, the Bank 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. The R&S period, elected by the bank to be two years, 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. 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 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.
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.
Bank Owned Life Insurance [Policy Text Block]	Bank-owned life insurance. First Financial purchases and is the owner and beneficiary of the 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. Our quantitative impairment analysis utilized the 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 2020, First Financial engaged a third-party to perform a quantitative analysis of its goodwill to determine whether any impairment existed for its annual impairment test. This third-party quantitative analysis was performed due to the on-going economic market disruption, the movement of the Company’s stock price in relation to other bank indexes and the length of time that the market value of the reporting unit has been below its book value. This analysis indicated that no impairment existed as of the issue date. Additionally, in response to the COVID-19 pandemic and the related deterioration in general economic conditions, First Financial performed an interim qualitative impairment test as of the end of each quarter in 2020. Likewise, the results of these interim qualitative tests did not indicate that the Company's goodwill was impaired.
Other intangible assets, Policy	Other intangible assets. Other intangible assets consist primarily of core deposit, customer list 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
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). 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. These tax credits and other net tax benefits received are recognized as a component of income tax expense in the Consolidated Statements of Income and is evaluated for impairment at the end of each reporting period.
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 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. Stock option 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. In accordance with the CARES Act, performing loans that demonstrated limited signs of credit deterioration, but were modified to provide borrowers relief during the COVID-19 pandemic were not considered to be TDR as of December 31, 2021 or 2020.
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 a Level 2 measurement. 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 $28.8 million and $45.3 million at December 31, 2021 and December 31, 2020, respectively, with a valuation allowance of $9.7 million and $13.5 million at December 31, 2021 and December 31, 2020, 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.

RECENTLY ADOPTED AND ISSUED A_2

RECENTLY ADOPTED AND ISSUED ACCOUNTING STANDARDS (Tables)	12 Months Ended
	Dec. 31, 2021
Accounting Standards Update and Change in Accounting Principle [Abstract]
Accounting Standards Update and Change in Accounting Principle	The impact of adopting ASC 326 was as follows: January 1, 2020 (dollars in thousands) As Reported under ASC 326 Pre-ASC 326 Impact of ASC 326 Adoption Assets Loans Commercial and industrial $ 28,485 $ 18,584 $ 9,901 Lease financing 1,089 971 118 Construction real estate 13,960 2,381 11,579 Commercial real estate 47,697 23,579 24,118 Residential real estate 10,789 5,299 5,490 Home equity 13,217 4,787 8,430 Installment 1,193 392 801 Credit card 2,725 1,657 1,068 Allowance for credit losses on loans $ 119,155 $ 57,650 $ 61,505 Liabilities Deferred tax liability $ 16,252 $ 33,030 $ (16,778) Allowance for credit losses on OBS credit exposures 12,740 585 12,155

INVESTMENTS (Tables)

INVESTMENTS (Tables)	12 Months Ended
	Dec. 31, 2021
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, 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 is a summary of HTM and AFS investment securities as of December 31, 2020: Held-to-maturity Available-for-sale (Dollars in thousands) Amortized Unrecognized Unrecognized Fair Amortized Unrealized Unrealized Fair U.S. Treasuries $ 0 $ 0 $ 0 $ 0 $ 99 $ 4 $ 0 $ 103 Securities of U.S. government agencies and corporations 0 0 0 0 60 0 0 60 Mortgage-backed securities - residential 13,990 197 0 14,187 704,482 15,938 (237) 720,183 Mortgage-backed securities - commercial 71,737 3,485 0 75,222 584,125 10,395 (3,584) 590,936 Collateralized mortgage obligations 5,799 79 0 5,878 634,418 21,148 (445) 655,121 Obligations of state and other political subdivisions 9,911 1,239 0 11,150 856,054 46,755 (291) 902,518 Asset-backed securities 0 0 0 0 478,539 4,158 (826) 481,871 Other securities 30,250 11 0 30,261 72,252 1,544 (8) 73,788 Total $ 131,687 $ 5,011 $ 0 $ 136,698 $ 3,330,029 $ 99,942 $ (5,391) $ 3,424,580
Summary of Investment Securities by Estimated Maturity	The following table provides a summary of investment securities by contractual maturity as of December 31, 2021, 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 $ 18,824 $ 18,910 Due after one year through five years 639 699 84,773 86,693 Due after five years through ten years 36,651 37,166 355,693 364,968 Due after ten years 2,886 2,917 846,405 863,927 Mortgage-backed securities - residential 0 0 728,050 724,137 Mortgage-backed securities - commercial 46,362 47,013 729,948 731,890 Collateralized mortgage obligations 11,882 12,103 696,258 697,740 Asset-backed securities 0 0 720,638 719,581 Total $ 98,420 $ 99,898 $ 4,180,589 $ 4,207,846
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, 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) December 31, 2020 Less than 12 months 12 months or more Total (Dollars in thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasuries $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 Securities of U.S. Government agencies and corporations 0 0 0 0 0 0 Mortgage-backed securities - residential 57,872 (237) 0 0 57,872 (237) Mortgage-backed securities - commercial 169,825 (986) 48,158 (2,598) 217,983 (3,584) Collateralized mortgage obligations 49,161 (445) 1 0 49,162 (445) Obligations of state and other political subdivisions 60,008 (291) 0 0 60,008 (291) Asset-backed securities 84,749 (435) 68,967 (391) 153,716 (826) Other securities 4,992 (8) 0 0 4,992 (8) Total $ 426,607 $ (2,402) $ 117,126 $ (2,989) $ 543,733 $ (5,391)

LOANS (Tables)

LOANS (Tables)	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2021
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, 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 The following table sets forth the Company's loan portfolio at December 31, 2020 by risk attribute and origination date: (Dollars in thousands) 2020 2019 2018 2017 2016 Prior Term Total Revolving Total Commercial & industrial Pass $ 1,141,163 $ 460,210 $ 296,221 $ 208,077 $ 122,686 $ 138,307 $ 2,366,664 $ 502,286 $ 2,868,950 Special mention 24,668 10,281 18,118 6,893 6,668 6,090 72,718 10,470 83,188 Substandard 6,709 2,370 8,022 26,565 5,124 1,192 49,982 5,389 55,371 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 1,172,540 $ 472,861 $ 322,361 $ 241,535 $ 134,478 $ 145,589 $ 2,489,364 $ 518,145 $ 3,007,509 Lease financing Pass $ 22,916 $ 22,397 $ 12,942 $ 6,967 $ 4,802 $ 2,368 $ 72,392 $ 0 $ 72,392 Special mention 290 0 0 0 0 0 290 0 290 Substandard 5 0 0 180 120 0 305 0 305 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 23,211 $ 22,397 $ 12,942 $ 7,147 $ 4,922 $ 2,368 $ 72,987 $ 0 $ 72,987 Construction real estate Pass $ 96,410 $ 259,524 $ 182,625 $ 23,185 $ 24,786 $ 426 $ 586,956 $ 19,671 $ 606,627 Special mention 0 621 18,203 9,984 661 0 29,469 0 29,469 Substandard 0 0 0 0 0 0 0 0 0 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 96,410 $ 260,145 $ 200,828 $ 33,169 $ 25,447 $ 426 $ 616,425 $ 19,671 $ 636,096 Commercial real estate - investor Pass $ 515,950 $ 1,011,898 $ 427,077 $ 378,536 $ 286,587 $ 361,403 $ 2,981,451 $ 56,398 $ 3,037,849 Special mention 0 17,463 15,534 44,426 32,408 43,704 153,535 559 154,094 Substandard 6,198 2,043 22,497 7,067 68 14,724 52,597 0 52,597 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 522,148 $ 1,031,404 $ 465,108 $ 430,029 $ 319,063 $ 419,831 $ 3,187,583 $ 56,957 $ 3,244,540 Commercial real estate - owner Pass $ 185,692 $ 162,480 $ 147,236 $ 125,275 $ 128,755 $ 211,519 $ 960,957 $ 36,721 $ 997,678 Special mention 4,292 11,380 2,891 8,230 3,017 19,384 49,194 59 49,253 Substandard 668 504 7,054 5,496 306 2,321 16,349 38 16,387 Doubtful 0 0 0 0 0 0 0 0 0 Total $ 190,652 $ 174,364 $ 157,181 $ 139,001 $ 132,078 $ 233,224 $ 1,026,500 $ 36,818 $ 1,063,318 Residential real estate Performing $ 290,277 $ 241,601 $ 115,747 $ 64,220 $ 60,094 $ 224,281 $ 996,220 $ 0 $ 996,220 Nonperforming 321 429 673 643 87 4,713 6,866 0 6,866 Total $ 290,598 $ 242,030 $ 116,420 $ 64,863 $ 60,181 $ 228,994 $ 1,003,086 $ 0 $ 1,003,086 Home equity Performing $ 60,967 $ 20,200 $ 17,445 $ 11,308 $ 9,744 $ 41,571 $ 161,235 $ 577,609 $ 738,844 Nonperforming 0 0 0 39 28 138 205 4,050 4,255 Total $ 60,967 $ 20,200 $ 17,445 $ 11,347 $ 9,772 $ 41,709 $ 161,440 $ 581,659 $ 743,099 Installment Performing $ 21,584 $ 15,614 $ 11,041 $ 8,812 $ 1,954 $ 3,185 $ 62,190 $ 19,479 $ 81,669 Nonperforming 15 53 23 35 17 36 179 2 181 Total $ 21,599 $ 15,667 $ 11,064 $ 8,847 $ 1,971 $ 3,221 $ 62,369 $ 19,481 $ 81,850 Credit cards Performing $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 47,845 $ 47,845 Nonperforming 0 0 0 0 0 0 0 640 640 Total $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 48,485 $ 48,485 Grand Total $ 2,378,125 $ 2,239,068 $ 1,303,349 $ 935,938 $ 687,912 $ 1,075,362 $ 8,619,754 $ 1,281,216 $ 9,900,970
Loan Delinquency, including Nonaccrual Loans		Loan delinquency, including nonaccrual loans, was as follows: 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 As of December 31, 2020 (Dollars in thousands) 30 - 59 60 - 89 > 90 days Total Current Total > 90 days Loans Commercial & industrial $ 6,532 $ 0 $ 1,861 $ 8,393 $ 2,999,116 $ 3,007,509 $ 0 Lease financing 0 0 0 0 72,987 72,987 0 Construction real estate 0 0 0 0 636,096 636,096 0 Commercial real estate-investor 136 0 24,422 24,558 3,219,982 3,244,540 0 Commercial real estate-owner 6,480 174 400 7,054 1,056,264 1,063,318 0 Residential real estate 2,809 370 3,687 6,866 996,220 1,003,086 0 Home equity 1,483 835 1,937 4,255 738,844 743,099 0 Installment 94 35 51 180 81,670 81,850 0 Credit card 303 163 174 640 47,845 48,485 169 Total $ 17,837 $ 1,577 $ 32,532 $ 51,946 $ 9,849,024 $ 9,900,970 $ 169
Loans Restructured During Period		The following table provides information on loan modifications classified as TDRs during the years ended December 31, 2021, 2020 and 2019: Years ended December 31, 2021 2020 2019 (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 7 $ 9,311 $ 8,039 8 $ 14,984 $ 14,984 8 $ 25,009 $ 25,071 Construction 0 0 0 0 0 0 0 0 0 Commercial 8 16,850 9,807 0 0 0 9 3,024 2,932 Residential 17 1,585 1,553 24 1,953 1,847 30 3,415 3,062 Home equity 2 30 30 11 351 349 14 395 366 Installment 1 0 0 2 35 22 2 41 39 Total 35 $ 27,776 $ 19,429 45 $ 17,323 $ 17,202 63 $ 31,884 $ 31,470
Loans Restructured, Modifications		The following table provides information on how TDRs were modified during the years ended December 31, 2021, 2020 and 2019: Years Ended December 31, (Dollars in thousands) 2021 2020 2019 Extended maturities $ 0 $ 0 $ 2,877 Adjusted interest rates 0 0 5,284 Combination of rate and maturity changes 0 0 516 Forbearance 7,328 4,759 20,320 Other (1) 12,101 12,443 2,473 Total $ 19,429 $ 17,202 $ 31,470 (1) Other includes covenant modifications and other concessions or combination of concessions that do not consist of interest rate adjustments, forbearance 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: 2021 2020 2019 (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 Total nonaccrual Nonaccrual loans (1) Commercial & industrial $ 11,077 $ 6,285 $ 17,362 $ 18,711 $ 10,519 $ 29,230 $ 24,346 Lease financing 0 203 203 0 0 0 223 Construction real estate 0 0 0 0 0 0 0 Commercial real estate 17,716 1,796 19,512 6,957 27,725 34,682 7,295 Residential real estate 0 8,305 8,305 251 11,350 11,601 10,892 Home equity 0 2,922 2,922 0 5,076 5,076 5,242 Installment 0 88 88 0 163 163 167 Total nonaccrual loans $ 28,793 $ 19,599 $ 48,392 $ 25,919 $ 54,833 $ 80,752 $ 48,165 Interest income effect 2021 2020 2019 Gross amount of interest that would have been recorded under original terms $ 5,132 $ 5,892 $ 5,813 Interest included in income Nonaccrual loans 1,618 1,636 1,042 Troubled debt restructurings 314 426 801 Total interest included in income 1,932 2,062 1,843 Net impact on interest income $ 3,200 $ 3,830 $ 3,970 Commitments outstanding to borrowers with nonaccrual loans $ 0 $ 0 $ 3 (1) Nonaccrual loans include nonaccrual TDRs of $16.0 million, $14.7 million and $18.5 million as of December 31, 2021, 2020 and 2019, respectively.
Investment in Impaired Loans		First Financial's investment in impaired loans was as follows: Year ended December 31, 2019 (Dollars in thousands) Average Interest Loans with no related allowance recorded Commercial & industrial $ 31,846 $ 926 Lease financing 168 0 Construction real estate 6 0 Commercial real estate 18,757 357 Residential real estate 15,915 307 Home equity 5,893 121 Installment 170 2 Total 72,755 1,713 Loans with an allowance recorded Commercial & industrial 4,721 87 Lease financing 57 0 Construction real estate 0 0 Commercial real estate 1,339 31 Residential real estate 446 12 Home equity 0 0 Installment 0 0 Total 6,563 130 Total Commercial & industrial 36,567 1,013 Lease financing 225 0 Construction real estate 6 0 Commercial real estate 20,096 388 Residential real estate 16,361 319 Home equity 5,893 121 Installment 170 2 Total $ 79,318 $ 1,843
Schedule of Collateral Dependent Loans		The following table presents the amortized cost basis of collateral dependent loans by class of loan. 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 Leasing 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 13171000 $ 13,050 $ 6,973 $ 38 $ 11,729 $ 3,431 $ 48,392 December 31, 2020 Type of Collateral (Dollar in thousands) Business assets Commercial real estate Equipment Land Residential real estate Other Total Class of loan Commercial & industrial $ 30,961 $ 6,130 $ 2,608 $ 865 $ 0 $ 4,892 $ 45,456 Commercial real estate-investor 0 20,212 661 5,537 872 0 27,282 Commercial real estate-owner 5,842 3,495 0 42 344 0 9,723 Residential real estate 0 0 0 0 11,601 0 11,601 Home equity 0 0 0 0 5,076 0 5,076 Installment 0 0 0 0 0 163 163 Total $ 36,803 $ 29,837 $ 3,269 $ 6,444 $ 17,893 $ 5,055 $ 99,301
Changes in Other Real Estate Owned		Changes in OREO were as follows: Years ended December 31, (Dollars in thousands) 2021 2020 2019 Balance at beginning of year $ 1,287 $ 2,033 $ 1,401 Additions Commercial 98 510 415 Residential 0 507 2,033 Total additions 98 1,017 2,448 Disposals Commercial (947) (217) (541) Residential (331) (1,859) (912) Total disposals (1,278) (2,076) (1,453) Valuation adjustments Commercial (9) 448 (112) Residential 0 (135) (251) Total valuation adjustments (9) 313 (363) Balance at end of year $ 98 $ 1,287 $ 2,033

ALLOWANCE FOR CREDIT LOSSES (Ta

ALLOWANCE FOR CREDIT LOSSES (Tables)	12 Months Ended
	Dec. 31, 2021
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: 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 Balance at beginning of year $ 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 2019 (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 $ 18,746 $ 1,130 $ 3,413 $ 21,048 $ 4,964 $ 5,348 $ 362 $ 1,531 $ 56,542 Provision for credit losses 23,631 3 (1,100) 5,107 739 695 2 1,521 30,598 Gross charge-offs (26,676) (162) 0 (3,689) (677) (2,591) (223) (1,547) (35,565) Recoveries 2,883 0 68 1,113 273 1,335 251 152 6,075 Total net charge-offs (23,793) (162) 68 (2,576) (404) (1,256) 28 (1,395) (29,490) Ending allowance for credit losses $ 18,584 $ 971 $ 2,381 $ 23,579 $ 5,299 $ 4,787 $ 392 $ 1,657 $ 57,650

PREMISES AND EQUIPMENT (Tables)

PREMISES AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Table Text Block]	Premises and equipment at December 31 were as follows: (Dollars in thousands) 2021 2020 Land and land improvements $ 49,402 $ 52,373 Buildings 155,337 161,371 Furniture and fixtures 70,847 70,177 Leasehold improvements 30,190 29,525 Construction in progress 8,145 8,434 313,921 321,880 Less: Accumulated depreciation and amortization 120,881 114,669 Total $ 193,040 $ 207,211

LEASES (Tables)

LEASES (Tables)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Lease, Cost [Table Text Block]	The components of lease expense for the years ended December 31, 2021, 2020 and 2019 were as follows: (Dollars in thousands) December 31, 2021 December 31, 2020 December 31, 2019 Operating lease cost $ 7,425 $ 7,897 $ 7,324 Short-term lease cost 108 142 55 Variable lease cost 2,621 2,532 2,553 Total operating lease cost $ 10,154 $ 10,571 $ 9,932
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	Future minimum commitments due under these lease agreements as of December 31, 2021 are as follows: (Dollars in thousands) Operating leases 2022 $ 7,784 2023 7,683 2024 7,288 2025 6,673 2026 6,269 Thereafter 50,311 Total lease payments 86,008 Less imputed interest 18,456 Total $ 67,552
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, 2021 December 31, 2020 December 31, 2019 Operating leases Weighted-average remaining lease term 13.9 years 15.1 years 15.6 years Weighted-average discount rate 3.25 % 3.07 % 3.43 %
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, 2021 December 31, 2020 December 31, 2019 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 6,860 $ 8,196 $ 7,335 ROU assets obtained in exchange for lease obligations Operating leases 6,076 9,725 64,902

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL (Tables)	12 Months Ended
	Dec. 31, 2021
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, 2021, 2020 and 2019 are shown below. (Dollars in thousands) 2021 2020 2019 Balance at beginning of year $ 937,771 $ 937,771 $ 880,251 Goodwill resulting from business combinations 62,978 0 57,520 Balance at end of year $ 1,000,749 $ 937,771 $ 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, 2021 December 31, 2020 Amortized intangible assets Core deposit intangibles $ 45,256 $ (26,911) $ 51,031 $ (27,524) Customer list 69,563 (8,362) 39,420 (4,778) Other 14,589 (5,237) 10,113 (3,710) Total $ 129,408 $ (40,510) $ 100,564 $ (36,012)
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 2022 $ 11,515 2023 10,536 2024 9,193 2025 9,145 2026 9,092

DEPOSITS (Tables)

DEPOSITS (Tables)	12 Months Ended
	Dec. 31, 2021
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 2022 $ 1,131,574 2023 83,589 2024 50,983 2025 32,569 2026 31,352 Thereafter 196 Total $ 1,330,263

BORROWINGS (Tables)

BORROWINGS (Tables)	12 Months Ended
	Dec. 31, 2021
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: 2021 2020 2019 (Dollars in thousands) Amount Rate Amount Rate Amount Rate At December 31, Federal funds purchased and securities sold under agreements to repurchase $ 51,203 0.01 % $ 166,594 0.05 % $ 165,181 0.85 % FHLB borrowings 225,000 0.18 % 0 0.00 % 1,151,000 1.73 % Other short-term borrowings 20,000 1.90 % 0 0.00 % 0 0.00 % Total $ 296,203 0.27 % $ 166,594 0.05 % $ 1,316,181 1.62 % Average for the year Federal funds purchased and securities sold under agreements to repurchase $ 160,967 0.07 % $ 149,036 0.26 % $ 155,859 1.15 % FHLB borrowings 43,371 0.20 % 441,867 1.37 % 990,860 2.37 % Other short-term borrowings 165 1.92 % 0 0.00 % 0 0.00 % Total $ 204,503 0.10 % $ 590,903 1.09 % $ 1,146,719 1.90 %
Schedule Of Remaining Contractual Maturity Of Secured Borrowings And Class Of Collateral Pledged Under Repurchase Agreements Table [Table Text Block]	The following shows the remaining contractual maturity of repurchase agreements by collateral pledged: (Dollars in thousands) Overnight and Continuous Repurchase agreements Mortgage-backed securities $ 48,370 Collateralized mortgage obligations 2,833 Total $ 51,203
Summary of Long-term Debt [Table Text Block]	The following is a summary of First Financial's long-term debt: 2021 2020 (Dollars in thousands) Amount Average Rate Amount Average Rate FRB borrowings $ 0 0.00 % $ 434,982 0.35 % FHLB borrowings 0 0.00 % 19,971 1.43 % Subordinated debt 313,248 4.86 % 321,384 4.86 % Unamortized debt issuance costs (2,384) n/a (2,770) n/a Capital lease liability 1,781 3.81 % 1,860 3.81 % Capital loan with municipality 775 0.00 % 775 0.00 % Subtotal 313,420 4.88 % 776,202 2.25 % Acquired in Summit acquisition Bank lines of credit 23,030 2.77 % 0 0.00 % Notes issued in conjunction with acquisition of property and equipment 73,382 4.09 % 0 0.00 % Total notes payable acquired in Summit acquisition 96,412 3.77 % 0 0.00 % Total long-term debt $ 409,832 4.62 % $ 776,202 2.25 %
Schedule of Maturities of Long-term Debt [Table Text Block]	As of December 31, 2021, First Financial's long-term debt matures as follows: (Dollars in thousands) Long-term debt 2022 $ 28,091 2023 15,086 2024 23,091 2025 12,301 2026 16,765 Thereafter 314,498 Total $ 409,832

DERIVATIVES (Tables)

DERIVATIVES (Tables)	12 Months Ended
	Dec. 31, 2021
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, 2021 December 31, 2020 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 $ 2,430,587 $ 84,694 $ (7,508) $ 2,300,336 $ 184,777 $ (107) Matched interest rate swaps with counterparty Accrued interest and other liabilities 2,430,587 7,508 (84,701) 2,300,336 107 (184,884) Foreign exchange contracts Matched foreign exchange contracts with customers Accrued interest and other assets 6,423,085 67,988 (52,780) 3,637,509 60,366 (27,249) Match foreign exchange contracts with counterparty Accrued interest and other liabilities 6,399,432 52,780 (67,988) 3,637,509 27,249 (60,366) Total $ 17,683,691 $ 212,970 $ (212,977) $ 11,875,690 $ 272,499 $ (272,606)
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, 2021 December 31, 2020 (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 $ 92,209 $ (149,647) $ (57,438) $ 184,991 $ (385,088) $ (200,097) Foreign exchange contracts with counterparty 120,768 (56,443) 64,325 87,615 (17,392) 70,223 Total $ 212,977 $ (206,090) $ 6,887 $ 272,606 $ (402,480) $ (129,874)
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, 2021: (Dollars in thousands) Notional Average Fair Client derivatives-interest rate contracts Receive fixed, matched interest rate swaps with borrower $ 2,430,587 5.7 $ 77,186 Pay fixed, matched interest rate swaps with counterparty 2,430,587 5.7 (77,193) Client derivatives-foreign exchange contracts Foreign exchange contracts - pay USD 6,423,085 0.6 15,208 Foreign exchange contracts - receive USD 6,399,432 0.6 (15,208) Total client derivatives $ 17,683,691 2.0 $ (7)

RELATED PARTIES TRANSACTIONS (T

RELATED PARTIES TRANSACTIONS (Tables)	12 Months Ended
	Dec. 31, 2021
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) 2021 Beginning balance $ 5,097 Additions 1,463 Deductions (3,078) Ending balance $ 3,482 Loans 90 days or more past due $ 0

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	12 Months Ended
	Dec. 31, 2021
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, 2021 December 31, 2020 (dollars in thousands) Unfunded commitment Loan balance Unfunded commitment Loan balance Commercial & industrial $ 1,545,995 $ 2,720,028 $ 1,270,765 $ 3,007,509 Lease financing 18,037 109,624 0 72,987 Construction real estate 484,038 455,894 374,008 636,096 Commercial real estate-investor 65,660 3,154,755 139,754 3,244,540 Commercial real estate-owner 29,824 1,071,859 51,637 1,063,318 Residential real estate 50,043 896,069 28,895 1,003,086 Home equity 822,343 708,399 762,406 743,099 Installment 15,985 119,454 18,229 81,850 Credit card 217,006 52,217 207,365 48,485 Total $ 3,248,931 $ 9,288,299 $ 2,853,059 $ 9,900,970
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, 2021 December 31, 2020 Investment Accounting Method Investment Unfunded commitment Investment Unfunded commitment LIHTC Proportional amortization $ 108,974 $ 57,341 $ 90,401 $ 47,531 HTC Equity 2,581 56 3,607 364 NMTC Equity 3,895 0 1,165 0 Renewable energy Equity 18,585 15,114 5,244 7,661 Total $ 134,035 $ 72,511 $ 100,417 $ 55,556 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, 2021 December 31, 2020 December 31, 2019 (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 $ 8,894 $ (8,581) $ 8,076 $ (7,629) $ 6,931 $ (6,397) HTC 1,116 (263) 474 (563) 2,862 (3,342) NMTC 210 (210) 175 (175) 350 (350) Renewable energy 11,467 (12,216) 4,756 (4,777) 0 0 Total $ 21,687 $ (21,270) $ 13,481 $ (13,144) $ 10,143 $ (10,089) (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, 2021
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) 2021 2020 2019 Current expense Federal $ 21,397 $ 34,632 $ 31,343 State 2,289 2,349 854 Total current expense 23,686 36,981 32,197 Deferred expense (benefit) Federal 10,944 (8,624) 10,946 State 1,143 244 1,644 Total deferred expense (benefit) 12,087 (8,380) 12,590 Income tax expense $ 35,773 $ 28,601 $ 44,787
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) 2021 2020 2019 Income taxes computed at federal statutory rate (21%) on income before income taxes $ 50,596 $ 38,726 $ 51,001 Benefit from tax-exempt income (5,613) (5,901) (5,964) Tax credits (21,561) (13,064) (10,075) Basis reduction on tax credit 1,346 657 738 Tax expense (benefit) of equity compensation (243) 340 (140) State income taxes, net of federal tax benefit 2,711 2,049 1,973 Affordable housing investments 7,194 6,635 5,825 Other 1,343 (841) 1,429 Income tax expense $ 35,773 $ 28,601 $ 44,787
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, 2021, and 2020, were as follows: (Dollars in thousands) 2021 2020 Deferred tax assets Allowance for credit losses $ 29,754 $ 39,671 Fair value adjustments on business combinations 0 3,870 Deferred compensation 292 235 Postretirement benefits other than pension liability 652 684 Accrued stock-based compensation 1,836 1,654 OREO write-downs 0 8 Interest on nonaccrual loans 442 1,712 Accrued expenses 7,286 5,647 State net operating loss 1,746 1,959 Leasing liability 15,794 16,947 Reserve for unfunded commitments 3,049 2,854 Deferred loan fees and costs 0 1,691 Other 565 577 Total deferred tax assets 61,416 77,509 Deferred tax liabilities Tax depreciation in excess of book depreciation (9,117) (11,923) FHLB and FRB stock (3,836) (4,043) Mortgage-servicing rights (3,518) (2,925) Leasing activities (10,860) (6,661) Retirement obligation (13,754) (10,984) Intangible assets (16,081) (13,942) Deferred loan fees and costs (933) 0 Prepaid expenses (680) (619) Limited partnership investments (2,957) (2,471) Fair value adjustments on business combinations (6,900) 0 Net unrealized gains on investment securities (5,791) (20,253) Foreign exchange deferred income (428) (2,080) ASU 2016-01 unrealized gain/loss-equity securities (2,339) (2,179) Right of use assets (13,390) (15,053) Other (2,426) (2,035) Total deferred tax liabilities (93,010) (95,168) Total net deferred tax liability $ (31,594) $ (17,659)
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, 2021 and 2020 is as follows: (Dollars in thousands) 2021 2020 Balance at beginning of year $ 2,386 $ 3,006 Settlements 0 (620) Balance at end of year $ 2,386 $ 2,386

EMPLOYEE BENEFIT PLANS (Tables)

EMPLOYEE BENEFIT PLANS (Tables)	12 Months Ended
	Dec. 31, 2021
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) 2021 2020 Change in benefit obligation Benefit obligation at beginning of year $ 87,494 $ 75,044 Service cost 9,128 7,932 Interest cost 2,157 2,455 Actuarial (gain) loss 2,588 9,171 Benefits paid, excluding settlement (8,096) (7,108) Benefit obligation at end of year 93,271 87,494 Change in plan assets Fair value of plan assets at beginning of year 155,704 141,816 Actual return on plan assets 15,774 20,996 Benefits paid, excluding settlement (8,096) (7,108) Fair value of plan assets at end of year 163,382 155,704 Amounts recognized in the Consolidated Balance Sheets Assets 70,111 68,210 Liabilities 0 0 Net amount recognized $ 70,111 $ 68,210 Amounts recognized in accumulated other comprehensive income (loss) Net actuarial loss $ 27,264 $ 32,943 Net prior service cost (270) (682) Deferred tax assets (6,148) (7,349) Net amount recognized $ 20,846 $ 24,912 Change in accumulated other comprehensive income (loss) $ (4,066) $ (3,029) Accumulated benefit obligation $ 92,316 $ 86,327
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) 2021 2020 2019 Service cost $ 9,128 $ 7,932 $ 6,591 Interest cost 2,157 2,455 2,778 Expected return on assets (10,118) (9,824) (9,718) Amortization of prior service cost (413) (413) (413) Recognized net actuarial loss 2,611 2,334 1,803 Net periodic benefit (income) cost 3,365 2,484 1,041 Other changes recognized in accumulated other comprehensive income (loss) Net actuarial (gain) loss (3,068) (2,001) (4,630) Prior service cost 0 0 0 Amortization of prior service cost 413 413 413 Amortization of gain (2,611) (2,334) (1,803) Total recognized in accumulated other comprehensive income (loss) (5,266) (3,922) (6,020) Total recognized in net periodic benefit cost and accumulated other comprehensive income (loss) $ (1,901) $ (1,438) $ (4,979)
Defined Benefit Plan, Assumptions [Table Text Block]	The pension plan assumptions are shown in the table that follows: December 31, 2021 2020 2019 Benefit obligations Discount rate 2.89 % 2.55 % 3.33 % Rate of compensation increase 3.50 % 3.50 % 3.50 % Weighted average interest crediting rate 2.58 % 2.14 % 2.82 % Net periodic benefit cost Discount rate 2.55 % 3.33 % 4.31 % 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 2.14 % 2.82 % 3.61 %
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]	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 Other assets 13,199 0 13,199 0 Total $ 163,382 $ 146,648 $ 16,734 $ 0 The fair value of the plan assets as of December 31, 2020 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 $ 129 $ 129 $ 0 $ 0 U. S. Government agencies 4,193 0 4,193 0 Fixed income mutual funds 65,443 65,443 0 0 Equity mutual funds 85,939 85,939 0 0 Total $ 155,704 $ 151,511 $ 4,193 $ 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 2022 $ 5,753 2023 5,848 2024 6,664 2025 6,931 2026 7,099 Thereafter 41,728

ACCUMULATED OTHER COMPREHENSI_2

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)	12 Months Ended
	Dec. 31, 2021
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, 2021 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 $ (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 December 31, 2019 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 Cumulative effect of new standard Ending Balance Unrealized gain (loss) on debt securities $ 65,858 $ (370) $ 66,228 $ (14,269) $ 51,959 $ (11,601) $ 51,959 $ 906 $ 41,264 Unrealized gain (loss) on derivatives 281 0 281 (64) 217 (217) 217 0 0 Retirement obligation 4,630 (1,390) 6,020 (1,371) 4,649 (32,590) 4,649 0 (27,941) Total $ 70,769 $ (1,760) $ 72,529 $ (15,704) $ 56,825 $ (44,408) $ 56,825 $ 906 $ 13,323
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) 2021 2020 2019 Affected Line Item in the Consolidated Statements of Income Realized gains and losses on securities available-for-sale $ (759) $ (4,563) $ (370) Net gain (loss) on sales of investment securities Defined benefit pension plan Amortization of prior service cost (2) 413 413 413 Other noninterest expense Recognized net actuarial loss (2) (2,611) (2,334) (1,803) Other noninterest expense Amortization and settlement charges of defined benefit pension items (2,198) (1,921) (1,390) Total reclassifications for the period, before tax $ (2,957) $ (6,484) $ (1,760) (1) Negative amounts are debits to profit/loss. (2) Included in the computation of net periodic pension cost (see Note 16 - Employee Benefit Plans for additional details).

CAPITAL (Tables)

CAPITAL (Tables)	12 Months Ended
	Dec. 31, 2021
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, 2021 Common equity tier 1 capital to risk-weighted assets Consolidated $ 1,262,789 10.84 % $ 815,197 7.00 % N/A N/A First Financial Bank 1,513,175 13.01 % 813,974 7.00 % $ 755,833 6.50 % Tier 1 capital to risk-weighted assets Consolidated 1,306,571 11.22 % 989,882 8.50 % N/A N/A First Financial Bank 1,513,708 13.02 % 988,397 8.50 % 930,256 8.00 % Total capital to risk-weighted assets Consolidated 1,642,549 14.10 % 1,222,795 10.50 % N/A N/A First Financial Bank 1,589,570 13.67 % 1,220,960 10.50 % 1,162,820 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 % Actual Minimum capital PCA requirement to be (Dollars in thousands) Capital Ratio Capital Ratio Capital Ratio December 31, 2020 Common equity tier 1 capital to risk-weighted assets Consolidated $ 1,325,922 11.82 % $ 785,338 7.00 % N/A N/A First Financial Bank 1,452,403 12.95 % 784,807 7.00 % $ 728,749 6.50 % Tier 1 capital to risk-weighted assets Consolidated 1,368,818 12.20 % 953,625 8.50 % N/A N/A First Financial Bank 1,452,507 12.96 % 952,980 8.50 % 896,922 8.00 % Total capital to risk-weighted assets Consolidated 1,744,802 15.55 % 1,178,007 10.50 % N/A N/A First Financial Bank 1,560,457 13.92 % 1,177,211 10.50 % 1,121,153 10.00 % Leverage Consolidated 1,368,818 9.55 % 573,526 4.00 % N/A N/A First Financial Bank 1,452,507 10.14 % 573,094 4.00 % 716,367 5.00 %

STOCK OPTIONS AND AWARDS (Table

STOCK OPTIONS AND AWARDS (Tables)	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Stock option activity for the year ended December 31, 2021, 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 27,451 $ 10.53 Granted 0 0.00 Exercised (6,936) 9.21 Forfeited or expired 0 0.00 Outstanding at end of year 20,515 $ 10.98 1.78 years $ 275 Exercisable at end of year 20,515 $ 10.98 1.78 years $ 275
Cash Proceeds Received and Tax Benefit from Share-based Payment Awards [Table Text Block]	2021 2020 2019 Total intrinsic value of options exercised $ 114 $ 86 $ 462 Cash received from exercises $ 64 $ 72 $ 90 Tax benefit from exercises $ 2,229 $ 1,776 $ 1,844
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: 2021 2020 2019 Number of shares Weighted Number of shares Weighted Number of shares Weighted Nonvested at beginning of year 763,283 $ 22.04 530,569 $ 27.19 462,446 $ 26.39 Granted 539,020 22.69 503,311 18.62 395,023 26.55 Vested (386,848) 22.24 (233,828) 26.07 (295,633) 24.94 Forfeited (75,722) 22.86 (36,769) 23.79 (31,267) 28.63 Nonvested at end of year 839,733 $ 22.30 763,283 $ 22.04 530,569 $ 27.19

EARNINGS PER COMMON SHARE (Tabl

EARNINGS PER COMMON SHARE (Tables)	12 Months Ended
	Dec. 31, 2021
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) 2021 2020 2019 Numerator Net income $ 205,160 $ 155,810 $ 198,075 Denominator Basic earnings per common share - weighted average shares 95,034,690 97,363,952 98,305,570 Effect of dilutive securities Employee stock awards 862,695 729,146 545,901 Diluted earnings per common share - adjusted weighted average shares 95,897,385 98,093,098 98,851,471 Earnings per share available to common shareholders Basic $ 2.16 $ 1.60 $ 2.01 Diluted $ 2.14 $ 1.59 $ 2.00

FAIR VALUE DISCLOSURES (Tables)

FAIR VALUE DISCLOSURES (Tables)	12 Months Ended
	Dec. 31, 2021
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, 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 Carrying Estimated Fair Value (Dollars in thousands) Value Total Level 1 Level 2 Level 3 December 31, 2020 Financial assets Cash and short-term investments $ 251,359 $ 251,359 $ 251,359 $ 0 $ 0 Investment securities held-to-maturity 131,687 136,698 0 136,698 0 Other investments 133,198 133,198 837 122,953 9,408 Loans and leases 9,725,291 9,743,497 0 0 9,743,497 Accrued interest receivable 50,903 50,903 0 13,221 37,682 Financial liabilities Deposits 12,232,003 12,238,058 0 12,238,058 0 Short-term borrowings 166,594 166,594 166,594 0 0 Long-term debt 776,202 774,674 0 774,674 0 Accrued interest payable 6,240 6,240 14 6,226 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, 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 Measurements Using Assets/Liabilities (Dollars in thousands) Level 1 Level 2 Level 3 at Fair Value December 31, 2020 Assets Investment securities available-for-sale $ 103 $ 3,383,902 $ 40,575 $ 3,424,580 Loans held for sale 0 41,103 0 41,103 Interest rate derivative contracts 0 185,032 0 185,032 Foreign exchange derivative contracts 0 87,615 0 87,615 Total $ 103 $ 3,697,652 $ 40,575 $ 3,738,330 Liabilities Interest rate derivative contracts $ 0 $ 186,124 $ 0 $ 186,124 Foreign exchange derivative contracts 0 87,615 0 87,615 Total $ 0 $ 273,739 $ 0 $ 273,739
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, 2021 and 2020. (dollars in thousands) December 31, 2021 December 31, 2020 Beginning balance $ 40,575 $ 9,190 Accretion (amortization) (38) 1 Increase (decrease) in fair value 44 (17) Purchases (settlements) (2,400) 31,401 Ending balance $ 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, 2021 Assets Collateral dependent loans Commercial $ 0 $ 0 $ 4,449 Commercial real estate 0 0 14,618 OREO 0 0 0 Fair Value Measurements Using (Dollars in thousands) Level 1 Level 2 Level 3 December 31, 2020 Assets Collateral dependent loans Commercial $ 0 $ 0 $ 25,367 Commercial real estate 0 0 6,432 OREO 0 0 54

FIRST FINANCIAL BANCORP. (PAR_2

FIRST FINANCIAL BANCORP. (PARENT COMPANY ONLY) FINANCIAL INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Schedule of Condensed Balance Sheet	Balance Sheets December 31, (Dollars in thousands) 2021 2020 Assets Cash $ 49,746 $ 172,902 Investment securities 1,836 1,388 Subordinated notes from subsidiaries 7,500 7,500 Investment in subsidiaries Commercial bank 2,447,095 2,346,009 Non-banks 10,417 9,559 Total investment in subsidiaries 2,457,512 2,355,568 Premises and equipment 1,311 1,328 Other assets 77,132 68,812 Total assets $ 2,595,037 $ 2,607,498 Liabilities Short-term borrowings $ 20,000 $ 0 Subordinated notes 310,864 320,615 Dividends payable 1,042 674 Other liabilities 4,189 4,139 Total liabilities 336,095 325,428 Shareholders’ equity 2,258,942 2,282,070 Total liabilities and shareholders’ equity $ 2,595,037 $ 2,607,498
Schedule of Condensed Income Statement	Statements of Income and Comprehensive Income Years Ended December 31, (Dollars in thousands) 2021 2020 2019 Income Interest income $ 34 $ 27 $ 30 Noninterest income 663 272 191 Dividends from subsidiaries 202,000 81,725 196,800 Total income 202,697 82,024 197,021 Expenses Interest expense 15,900 14,172 9,552 Salaries and employee benefits 9,784 8,004 8,169 Professional services 2,343 1,160 1,040 Other 5,186 5,163 6,599 Total expenses 33,213 28,499 25,360 Income before income taxes and equity in undistributed net earnings of subsidiaries 169,484 53,525 171,661 Income tax expense (benefit) (7,787) (6,145) (5,975) Equity in undistributed earnings (loss) of subsidiaries 27,889 96,140 20,439 Net income $ 205,160 $ 155,810 $ 198,075 Comprehensive income $ 156,063 $ 191,151 $ 254,900
Schedule of Condensed Cash Flow Statement	Statements of Cash Flows Years Ended December 31, (Dollars in thousands) 2021 2020 2019 Operating activities Net income $ 205,160 $ 155,810 $ 198,075 Adjustments to reconcile net income to net cash provided by operating activities Equity in undistributed (earnings) loss of subsidiaries (27,889) (96,140) (20,439) Depreciation and amortization 859 712 584 Stock-based compensation expense 9,635 7,678 7,969 Unrealized (gain) loss on equity securities (448) (272) (191) Deferred income taxes (224) (158) 1,255 (Decrease) increase in dividends payable 368 (175) 384 (Decrease) increase in other liabilities (751) (22) (244) Decrease (increase) in other assets (8,096) 8,907 (6,996) Net cash provided by (used in) operating activities 178,614 76,340 180,397 Investing activities Capital contributions to subsidiaries (113,152) 0 0 Net cash acquired (paid) in business combinations 0 0 (53,660) Proceeds from sales and maturities of investment securities 0 0 264 Purchases of investment securities 0 0 (500) Net cash (used in) provided by investing activities (113,152) 0 (53,896) Financing activities (Decrease) increase in short-term borrowings 20,000 0 0 Proceeds from long-term borrowings (10,592) 150,000 0 Cash dividends paid on common stock (87,316) (89,691) (89,097) Purchases of common stock (108,077) (16,686) (66,218) Proceeds from exercise of stock options, net of shares purchased 64 72 90 Other (2,697) (3,002) (2,285) Net cash provided by (used in) financing activities (188,618) 40,693 (157,510) Net increase (decrease) in cash (123,156) 117,033 (31,009) Cash at beginning of year 172,902 55,869 86,878 Cash at end of year $ 49,746 $ 172,902 $ 55,869

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Financing Receivables (Details)	12 Months Ended
	Dec. 31, 2021USD ($)
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, 2021
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, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	$ 29,457	$ 37,700
Held-to-maturity Securities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	200	300
Available-for-sale Securities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Receivable	$ 14,900	$ 12,900

RECENTLY ADOPTED AND ISSUED A_3

RECENTLY ADOPTED AND ISSUED ACCOUNTING STANDARDS - Additional Information (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Dec. 31, 2021	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	$ 61,505	$ 61,505
Off-Balance Sheet, Credit Loss, Liability, Change in Method, Credit Loss Expense (Reversal)	12,155	$ 12,200
Deferred tax liability, Credit Loss, Change in Method, Credit Loss Expense (Reversal)	$ (16,778)
Cumulative Effect, Period of Adoption, Adjustment
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest			$ (56,882)	$ 3,542
Retained earnings | Cumulative Effect, Period of Adoption, Adjustment
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest			$ (56,882)	$ 2,636

RECENTLY ADOPTED AND ISSUED A_4

RECENTLY ADOPTED AND ISSUED ACCOUNTING STANDARDS ASC 326 (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loans and Leases Receivable, Allowance	$ 119,155	$ 131,992	$ 175,679	$ 57,650	$ 56,542
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	61,505	61,505
Deferred Tax Liabilities, Deferred Expense	16,252			33,030
Deferred tax liability, Credit Loss, Change in Method, Credit Loss Expense (Reversal)	(16,778)
Off-Balance Sheet, Credit Loss, Liability	12,740			585
Off-Balance Sheet, Credit Loss, Liability, Change in Method, Credit Loss Expense (Reversal)	12,155	12,200
Commercial & Industrial
Loans and Leases Receivable, Allowance	28,485	44,052	51,454	18,584	18,746
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	9,901	9,901
Lease financing
Loans and Leases Receivable, Allowance	1,089	1,633	995	971	1,130
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	118	118
Construction real estate
Loans and Leases Receivable, Allowance	13,960	11,874	21,736	2,381	3,413
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	11,579	11,579
Commercial real estate
Loans and Leases Receivable, Allowance	47,697	53,420	76,795	23,579	21,048
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	24,118	24,118
Residential real estate
Loans and Leases Receivable, Allowance	10,789	6,225	8,560	5,299	4,964
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	5,490	5,490
Home equity
Loans and Leases Receivable, Allowance	13,217	9,643	11,869	4,787	5,348
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	8,430	8,430
Installment
Loans and Leases Receivable, Allowance	1,193	1,097	1,215	392	362
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	801	801
Credit card
Loans and Leases Receivable, Allowance	2,725	4,048	$ 3,055	$ 1,657	$ 1,531
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	$ 1,068	$ 1,068

RESTRICTIONS ON CASH AND DIVI_2

RESTRICTIONS ON CASH AND DIVIDENDS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Restrictions on Subsidiary Dividends, Loans or Advances [Line Items]
Average Restriction on Cash and Due From Bank Accounts	$ 0	$ 0
Restricted Cash	34	$ 38
Subsidiaries [Member]
Restrictions on Subsidiary Dividends, Loans or Advances [Line Items]
Retained Earnings, Unappropriated	727.9
Amount Available for Dividend Distribution without Affecting Capital Adequacy Requirements	$ 166.2

INVESTMENT SECURITIES INVESTMEN

INVESTMENT SECURITIES INVESTMENTS - Additional Information (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Gain (Loss) on Securities [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale			$ 375,276	$ 122,248	$ 519,136
Debt Securities, Available-for-sale, Realized Gain			6,800	900	2,100
Debt Securities, Available-for-sale, Realized Loss			7,600	800	2,100
Available For Sale Securities Net Realized Gain Loss Tax Provision			(173)	19	(7)
Securities transferred from HTM to AFS		$ 268,700	0	0	$ 268,703
Realized gain (loss) on debt securities transferred from HTM to AFS	$ 200
Pledged Financial Instruments, Not Separately Reported, Securities			1,500,000	1,511,322
Debt Securities, Held-to-maturity, Allowance for Credit Loss			$ 0	$ 0
NumberOfSecuritiesInSecurityPortfolio			1,418	1,351
NumberOfSecuritiesInUnrealizedLossPosition			327	94
Debt Securities, Held-to-maturity, Nonaccrual			$ 0	$ 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss			(485)	0
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale				117,800
Other securities
Gain (Loss) on Securities [Line Items]
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss			$ (485)	$ 0

INVESTMENTS - Summary of Held-T

INVESTMENTS - Summary of Held-To-Maturity and Available-For-Sale Investment Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investment Holdings [Line Items]
Total	$ 98,420	$ 131,687
Held To Maturity unrecognized gain	1,963	5,011
Held To Maturity unrecognized loss	485	0
Held-to-Maturity Market Value	99,898	136,698
Investment Securities, Available-for-sale, Amortized Cost, Total	4,180,589	3,330,029
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	58,386	99,942
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(31,129)	(5,391)
Investment Securities, Available-for-sale	4,207,846	3,424,580
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	34,961	99
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	4	4
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(189)	0
Investment Securities, Available-for-sale	34,776	103
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	78,998	60
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	248	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(129)	0
Investment Securities, Available-for-sale	79,117	60
Mortgage-backed securities-residential
Investment Holdings [Line Items]
Total	0	13,990
Held To Maturity unrecognized gain	0	197
Held To Maturity unrecognized loss	0	0
Held-to-Maturity Market Value	0	14,187
Investment Securities, Available-for-sale, Amortized Cost, Total	728,050	704,482
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	6,635	15,938
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(10,548)	(237)
Investment Securities, Available-for-sale	724,137	720,183
Mortgage-backed securities-commercial
Investment Holdings [Line Items]
Total	46,362	71,737
Held To Maturity unrecognized gain	651	3,485
Held To Maturity unrecognized loss	0	0
Held-to-Maturity Market Value	47,013	75,222
Investment Securities, Available-for-sale, Amortized Cost, Total	729,948	584,125
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	4,294	10,395
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(2,352)	(3,584)
Investment Securities, Available-for-sale	731,890	590,936
Collateralized mortgage obligations
Investment Holdings [Line Items]
Total	11,882	5,799
Held To Maturity unrecognized gain	221	79
Held To Maturity unrecognized loss	0	0
Held-to-Maturity Market Value	12,103	5,878
Investment Securities, Available-for-sale, Amortized Cost, Total	696,258	634,418
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	7,979	21,148
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(6,497)	(445)
Investment Securities, Available-for-sale	697,740	655,121
Obligations of state and other political subdivisions
Investment Holdings [Line Items]
Total	8,926	9,911
Held To Maturity unrecognized gain	915	1,239
Held To Maturity unrecognized loss	0	0
Held-to-Maturity Market Value	9,841	11,150
Investment Securities, Available-for-sale, Amortized Cost, Total	1,058,735	856,054
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	35,591	46,755
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(8,594)	(291)
Investment Securities, Available-for-sale	1,085,732	902,518
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	720,638	478,539
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,521	4,158
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(2,578)	(826)
Investment Securities, Available-for-sale	719,581	481,871
Other securities
Investment Holdings [Line Items]
Total	31,250	30,250
Held To Maturity unrecognized gain	176	11
Held To Maturity unrecognized loss	485	0
Held-to-Maturity Market Value	30,941	30,261
Investment Securities, Available-for-sale, Amortized Cost, Total	133,001	72,252
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2,114	1,544
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(242)	(8)
Investment Securities, Available-for-sale	$ 134,873	$ 73,788

INVESTMENTS - Summary of Invest

INVESTMENTS - Summary of Investment Securities by Estimated Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Held-to-Maturity Amortized Cost
Amortized cost	$ 98,420	$ 131,687
Held-to-Maturity Market Value
Held-to-Maturity Market Value	99,898	136,698
Available-for-Sale Amortized Cost
Amortized Cost	4,180,589	3,330,029
Available-for-Sale Market Value
Investment securities	4,207,846	3,424,580
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	18,824
Available-for-Sale Market Value
Investment securities	18,910
After One Year Through Five Years
Held-to-Maturity Amortized Cost
Amortized cost	639
Held-to-Maturity Market Value
Held-to-Maturity Market Value	699
Available-for-Sale Amortized Cost
Amortized Cost	84,773
Available-for-Sale Market Value
Investment securities	86,693
After Five Years Through Ten Years
Held-to-Maturity Amortized Cost
Amortized cost	36,651
Held-to-Maturity Market Value
Held-to-Maturity Market Value	37,166
Available-for-Sale Amortized Cost
Amortized Cost	355,693
Available-for-Sale Market Value
Investment securities	364,968
After Ten Years
Held-to-Maturity Amortized Cost
Amortized cost	2,886
Held-to-Maturity Market Value
Held-to-Maturity Market Value	2,917
Available-for-Sale Amortized Cost
Amortized Cost	846,405
Available-for-Sale Market Value
Investment securities	863,927
Mortgage-backed securities-residential
Held-to-Maturity Amortized Cost
Amortized cost	0	13,990
Held-to-Maturity Market Value
Held-to-Maturity Market Value	0	14,187
Available-for-Sale Amortized Cost
Amortized Cost	728,050	704,482
Available-for-Sale Market Value
Investment securities	724,137	720,183
Mortgage-backed securities-commercial
Held-to-Maturity Amortized Cost
Amortized cost	46,362	71,737
Held-to-Maturity Market Value
Held-to-Maturity Market Value	47,013	75,222
Available-for-Sale Amortized Cost
Amortized Cost	729,948	584,125
Available-for-Sale Market Value
Investment securities	731,890	590,936
Collateralized mortgage obligations
Held-to-Maturity Amortized Cost
Amortized cost	11,882	5,799
Held-to-Maturity Market Value
Held-to-Maturity Market Value	12,103	5,878
Available-for-Sale Amortized Cost
Amortized Cost	696,258	634,418
Available-for-Sale Market Value
Investment securities	697,740	655,121
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	720,638	478,539
Available-for-Sale Market Value
Investment securities	$ 719,581	$ 481,871

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, 2021	Dec. 31, 2020
Investments, Unrealized Loss Position [Line Items]
Document Period End Date	Dec. 31, 2021
Less than 12 Months Fair Value	$ 1,970,822	$ 426,607
Less than 12 Months Unrealized Loss	(27,427)	(2,402)
12 Months or More Fair Value	171,838	117,126
12 Months or More Unrealized Loss	(4,187)	(2,989)
Total Fair Value	2,142,660	543,733
Total Unrealized Loss	(31,614)	(5,391)
U.S. Treasuries
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	24,755	0
Less than 12 Months Unrealized Loss	(190)	0
12 Months or More Fair Value	0	0
12 Months or More Unrealized Loss	0	0
Total Fair Value	24,755	0
Total Unrealized Loss	(190)	0
Securities of U.S. government agencies and corporations
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	17,382	0
Less than 12 Months Unrealized Loss	(128)	0
12 Months or More Fair Value	0	0
12 Months or More Unrealized Loss	0	0
Total Fair Value	17,382	0
Total Unrealized Loss	(128)	0
Mortgage-backed securities-residential
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	459,098	57,872
Less than 12 Months Unrealized Loss	(8,375)	(237)
12 Months or More Fair Value	78,090	0
12 Months or More Unrealized Loss	(2,173)	0
Total Fair Value	537,188	57,872
Total Unrealized Loss	(10,548)	(237)
Mortgage-backed securities-commercial
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	205,520	169,825
Less than 12 Months Unrealized Loss	(2,149)	(986)
12 Months or More Fair Value	13,818	48,158
12 Months or More Unrealized Loss	(203)	(2,598)
Total Fair Value	219,338	217,983
Total Unrealized Loss	(2,352)	(3,584)
Collateralized mortgage obligations
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	369,318	49,161
Less than 12 Months Unrealized Loss	(6,110)	(445)
12 Months or More Fair Value	12,485	1
12 Months or More Unrealized Loss	(387)	0
Total Fair Value	381,803	49,162
Total Unrealized Loss	(6,497)	(445)
Obligations of state and other political subdivisions
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	380,735	60,008
Less than 12 Months Unrealized Loss	(7,543)	(291)
12 Months or More Fair Value	55,568	0
12 Months or More Unrealized Loss	(1,051)	0
Total Fair Value	436,303	60,008
Total Unrealized Loss	(8,594)	(291)
Asset-backed Securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	482,118	84,749
Less than 12 Months Unrealized Loss	(2,578)	(435)
12 Months or More Fair Value	0	68,967
12 Months or More Unrealized Loss	0	(391)
Total Fair Value	482,118	153,716
Total Unrealized Loss	(2,578)	(826)
Other securities
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	31,896	4,992
Less than 12 Months Unrealized Loss	(354)	(8)
12 Months or More Fair Value	11,877	0
12 Months or More Unrealized Loss	(373)	0
Total Fair Value	43,773	4,992
Total Unrealized Loss	$ (727)	$ (8)

LOANS - Additional Information

LOANS - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)loans	Dec. 31, 2020USD ($)loans	Dec. 31, 2019USD ($)loans	Dec. 31, 2018USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Restructured Loans | loans	150	155	157
Total restructured loans	$ 27,600	$ 21,800	$ 30,000
Restructured Loans, Accrual Status	11,600	7,100	11,400
Restructured Loans, Nonaccrual Status	16,000	14,700	18,500
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend	200	300		$ 2,500
Restructured Loans, Allowance for Loan and Lease Losses Included in Reserves	6,300	8,800
Restructured Loans, Portion Determined to be Uncollectible	1,700	1,700	2,600
Accruing TDRs performing in accordance with restructured terms for more than one year	5,000	5,000
Real Estate Acquired Through Foreclosure	98	1,287	$ 2,033	$ 1,401
Paycheck Protection Program Amount of Funding		594,600
Unearned fees		13,700
Loans and Leases Receivable, Net of Deferred Income	9,288,299	9,900,970
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount	16,500	320,200
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Paycheck Protection Program Amount of Funding	55,600
Unearned fees	2,600
Loans and Leases Receivable, Net of Deferred Income	2,720,028	3,007,509
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 8,305	11,601
Financing Receivable, Modifications, Number of Contracts | loans	17
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 17,362	$ 45,456
Financing Receivable, Modifications, Number of Contracts | loans	7	8
Lease financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 203
Lease financing | Summit Funding Group, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 42,300

LOANS - Commercial and Consumer

LOANS - Commercial and Consumer Credit Exposure by Risk Attribute (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 1,945,075	$ 2,378,125
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,550,642	2,239,068
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,740,914	1,303,349
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	847,991	935,938
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	631,630	687,912
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,114,203	1,075,362
Financing Receivable, before Allowance for Credit Loss	7,830,455	8,619,754
Financing Receivable, Revolving	1,457,844	1,281,216
Loans and Leases Receivable, Net of Deferred Income	9,288,299	9,900,970
Commercial & industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	713,807	1,172,540
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	447,365	472,861
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	348,343	322,361
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	181,554	241,535
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	138,731	134,478
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	161,218	145,589
Financing Receivable, before Allowance for Credit Loss	1,991,018	2,489,364
Financing Receivable, Revolving	729,010	518,145
Loans and Leases Receivable, Net of Deferred Income	2,720,028	3,007,509
Commercial & industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	711,198	1,141,163
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	442,064	460,210
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	339,507	296,221
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	164,273	208,077
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	119,580	122,686
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	154,835	138,307
Financing Receivable, before Allowance for Credit Loss	1,931,457	2,366,664
Financing Receivable, Revolving	700,246	502,286
Loans and Leases Receivable, Net of Deferred Income	2,631,703	2,868,950
Commercial & industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	389	24,668
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	4,867	10,281
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	5,993	18,118
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	16,057	6,893
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,511	6,668
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,918	6,090
Financing Receivable, before Allowance for Credit Loss	38,735	72,718
Financing Receivable, Revolving	21,505	10,470
Loans and Leases Receivable, Net of Deferred Income	60,240	83,188
Commercial & industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,220	6,709
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	434	2,370
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,843	8,022
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,224	26,565
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	12,640	5,124
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,465	1,192
Financing Receivable, before Allowance for Credit Loss	20,826	49,982
Financing Receivable, Revolving	7,259	5,389
Loans and Leases Receivable, Net of Deferred Income	28,085	55,371
Commercial & industrial | 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	31,697	23,211
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	31,752	22,397
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	19,095	12,942
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	15,494	7,147
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,821	4,922
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,765	2,368
Financing Receivable, before Allowance for Credit Loss	109,624	72,987
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	109,624	72,987
Lease financing | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	31,697	22,916
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	21,536	22,397
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	19,095	12,942
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	15,494	6,967
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,821	4,802
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,765	2,368
Financing Receivable, before Allowance for Credit Loss	99,408	72,392
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	99,408	72,392
Lease financing | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	290
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	10,216	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	10,216	290
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	10,216	290
Lease financing | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	5
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	180
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	120
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss	0	305
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	305
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	95,991	96,410
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	206,952	260,145
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	96,726	200,828
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	24,890	33,169
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	317	25,447
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	12,719	426
Financing Receivable, before Allowance for Credit Loss	437,595	616,425
Financing Receivable, Revolving	18,299	19,671
Loans and Leases Receivable, Net of Deferred Income	455,894	636,096
Construction real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	95,991	96,410
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	200,421	259,524
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	96,726	182,625
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	15,886	23,185
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	317	24,786
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	12,719	426
Financing Receivable, before Allowance for Credit Loss	422,060	586,956
Financing Receivable, Revolving	18,299	19,671
Loans and Leases Receivable, Net of Deferred Income	440,359	606,627
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	6,531	621
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	18,203
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	9,004	9,984
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	661
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss	15,535	29,469
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	15,535	29,469
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	538,799	522,148
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	386,702	1,031,404
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	984,363	465,108
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	392,580	430,029
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	316,631	319,063
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	469,101	419,831
Financing Receivable, before Allowance for Credit Loss	3,088,176	3,187,583
Financing Receivable, Revolving	66,579	56,957
Loans and Leases Receivable, Net of Deferred Income	3,154,755	3,244,540
Commercial real estate-investor | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	537,183	515,950
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	379,217	1,011,898
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	944,915	427,077
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	367,946	378,536
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	294,147	286,587
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	434,641	361,403
Financing Receivable, before Allowance for Credit Loss	2,958,049	2,981,451
Financing Receivable, Revolving	66,579	56,398
Loans and Leases Receivable, Net of Deferred Income	3,024,628	3,037,849
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	7,479	17,463
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	18,136	15,534
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	18,006	44,426
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	15,566	32,408
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	34,153	43,704
Financing Receivable, before Allowance for Credit Loss	93,340	153,535
Financing Receivable, Revolving	0	559
Loans and Leases Receivable, Net of Deferred Income	93,340	154,094
Commercial real estate-investor | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,616	6,198
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	6	2,043
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	21,312	22,497
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	6,628	7,067
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,918	68
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	307	14,724
Financing Receivable, before Allowance for Credit Loss	36,787	52,597
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	36,787	52,597
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	205,423	190,652
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	187,574	174,364
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	129,953	157,181
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	151,727	139,001
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	122,600	132,078
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	266,979	233,224
Financing Receivable, before Allowance for Credit Loss	1,064,256	1,026,500
Financing Receivable, Revolving	7,603	36,818
Loans and Leases Receivable, Net of Deferred Income	1,071,859	1,063,318
Commercial real estate-owner | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	204,291	185,692
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	184,564	162,480
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	121,150	147,236
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	135,463	125,275
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	119,489	128,755
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	259,504	211,519
Financing Receivable, before Allowance for Credit Loss	1,024,461	960,957
Financing Receivable, Revolving	7,565	36,721
Loans and Leases Receivable, Net of Deferred Income	1,032,026	997,678
Commercial real estate-owner | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	970	4,292
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,283	11,380
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,262	2,891
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,751	8,230
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,381	3,017
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	5,512	19,384
Financing Receivable, before Allowance for Credit Loss	16,159	49,194
Financing Receivable, Revolving	0	59
Loans and Leases Receivable, Net of Deferred Income	16,159	49,253
Commercial real estate-owner | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	162	668
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	727	504
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	6,541	7,054
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	12,513	5,496
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,730	306
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,963	2,321
Financing Receivable, before Allowance for Credit Loss	23,636	16,349
Financing Receivable, Revolving	38	38
Loans and Leases Receivable, Net of Deferred Income	23,674	16,387
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	42,370	60,967
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	45,799	20,200
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	14,757	17,445
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	11,288	11,347
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	7,659	9,772
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	30,822	41,709
Financing Receivable, before Allowance for Credit Loss	152,695	161,440
Financing Receivable, Revolving	555,704	581,659
Loans and Leases Receivable, Net of Deferred Income	708,399	743,099
Home equity | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	42,298	60,967
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	45,638	20,200
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	14,713	17,445
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	11,221	11,308
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	7,603	9,744
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	30,588	41,571
Financing Receivable, before Allowance for Credit Loss	152,061	161,235
Financing Receivable, Revolving	553,245	577,609
Loans and Leases Receivable, Net of Deferred Income	705,306	738,844
Home equity | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	72	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	161	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	44	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	67	39
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	56	28
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	234	138
Financing Receivable, before Allowance for Credit Loss	634	205
Financing Receivable, Revolving	2,459	4,050
Loans and Leases Receivable, Net of Deferred Income	3,093	4,255
Installment
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	58,215	21,599
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	12,829	15,667
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	8,245	11,064
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	5,550	8,847
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,926	1,971
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,257	3,221
Financing Receivable, before Allowance for Credit Loss	91,022	62,369
Financing Receivable, Revolving	28,432	19,481
Loans and Leases Receivable, Net of Deferred Income	119,454	81,850
Installment | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	58,209	21,584
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	12,768	15,614
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	8,213	11,041
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	5,541	8,812
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,925	1,954
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,201	3,185
Financing Receivable, before Allowance for Credit Loss	90,857	62,190
Financing Receivable, Revolving	28,353	19,479
Loans and Leases Receivable, Net of Deferred Income	119,210	81,669
Installment | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	6	15
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	61	53
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	32	23
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	9	35
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1	17
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	56	36
Financing Receivable, before Allowance for Credit Loss	165	179
Financing Receivable, Revolving	79	2
Loans and Leases Receivable, Net of Deferred Income	244	181
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	52,217	48,485
Loans and Leases Receivable, Net of Deferred Income	52,217	48,485
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	51,772	47,845
Loans and Leases Receivable, Net of Deferred Income	51,772	47,845
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	445	640
Loans and Leases Receivable, Net of Deferred Income	445	640
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	258,773	290,598
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	231,669	242,030
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	139,432	116,420
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	64,908	64,863
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	34,945	60,181
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	166,342	228,994
Financing Receivable, before Allowance for Credit Loss	896,069	1,003,086
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	896,069	1,003,086
Residential real estate | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	258,537	290,277
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	230,699	241,601
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	138,239	115,747
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	64,310	64,220
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	34,606	60,094
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	162,924	224,281
Financing Receivable, before Allowance for Credit Loss	889,315	996,220
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	889,315	996,220
Residential real estate | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	236	321
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	970	429
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,193	673
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	598	643
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	339	87
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,418	4,713
Financing Receivable, before Allowance for Credit Loss	6,754	6,866
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	$ 6,754	$ 6,866

LOANS - Loan Delinquency, inclu

LOANS - Loan Delinquency, including Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	$ 25,202	$ 51,946
Current	9,263,097	9,849,024
Total loans and leases	9,288,299	9,900,970
Greater than 90 days past due and still accruing	137	169
30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	6,519	17,837
60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	5,380	1,577
Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	13,303	32,532
Commercial & industrial
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	5,084	8,393
Current	2,714,944	2,999,116
Total loans and leases	2,720,028	3,007,509
Greater than 90 days past due and still accruing	0	0
Commercial & industrial | 30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	303	6,532
Commercial & industrial | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	2,006	0
Commercial & industrial | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	2,775	1,861
Lease financing
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	93	0
Current	109,531	72,987
Total loans and leases	109,624	72,987
Greater than 90 days past due and still accruing	0	0
Lease financing | 30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	93	0
Lease financing | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	0	0
Lease financing | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	0	0
Construction real estate
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	0	0
Current	455,894	636,096
Total loans and leases	455,894	636,096
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	6,540	24,558
Current	3,148,215	3,219,982
Total loans and leases	3,154,755	3,244,540
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	89	136
Commercial real estate-investor | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	42	0
Commercial real estate-investor | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	6,409	24,422
Commercial real estate-owner
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	2,900	7,054
Current	1,068,959	1,056,264
Total loans and leases	1,071,859	1,063,318
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	56	6,480
Commercial real estate-owner | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	2,207	174
Commercial real estate-owner | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	637	400
Commercial real estate
Financing Receivable, Past Due [Line Items]
Total loans and leases	4,226,614	4,307,858
Residential real estate
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	6,755	6,866
Current	889,314	996,220
Total loans and leases	896,069	1,003,086
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	4,379	2,809
Residential real estate | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	262	370
Residential real estate | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	2,114	3,687
Home equity
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	3,092	4,255
Current	705,307	738,844
Total loans and leases	708,399	743,099
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	1,214	1,483
Home equity | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	692	835
Home equity | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	1,186	1,937
Installment
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	244	180
Current	119,210	81,670
Total loans and leases	119,454	81,850
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	162	94
Installment | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	37	35
Installment | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	45	51
Credit card
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	494	640
Current	51,723	47,845
Total loans and leases	52,217	48,485
Greater than 90 days past due and still accruing	137	169
Credit card | 30 to 59 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	223	303
Credit card | 60 to 89 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	134	163
Credit card | Greater than 90 days past due
Financing Receivable, Past Due [Line Items]
Financing Receivables Past Due	$ 137	$ 174

LOANS - Restructured Loans (Det

LOANS - Restructured Loans (Details)	12 Months Ended
	Dec. 31, 2021USD ($)loansentityd	Dec. 31, 2020USD ($)loans	Dec. 31, 2019USD ($)loans	Dec. 31, 2018USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Extended Maturities	$ 0	$ 0	$ 2,877,000
Adjusted Interest Rates	0	0	5,284,000
Combined Rate And Maturity	0	0	516,000
Forebearance Agreements	7,328,000	4,759,000	20,320,000
Other	12,101,000	12,443,000	2,473,000
Total	$ 19,429,000	$ 17,202,000	$ 31,470,000
Number of Restructured Loans | loans	150	155	157
Restructured loans, Number of Loans | loans	35	45	63
Restructured loans, Restructured loans, Pre-Modification Loan Balance	$ 27,776,000	$ 17,323,000	$ 31,884,000
Restructured loans, Period End Balance	$ 19,429,000	$ 17,202,000	$ 31,470,000
Restructured loans with payment default within 12 months of modification, Number of Loans | loans	1	1	3
Restructured loans with payment default within 12 months of modification, Period End Balance	$ 55,000	$ 7,000,000
Total restructured loans	27,600,000	21,800,000	$ 30,000,000
Restructured Loans, Accrual Status	11,600,000	7,100,000	11,400,000
Restructured Loans, Nonaccrual Status	16,000,000	14,700,000	$ 18,500,000
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend	200,000	300,000		$ 2,500,000
Restructured Loans, Allowance for Loan and Lease Losses Included in Reserves	6,300,000	8,800,000
Accruing TDRs performing in accordance with restructured terms for more than one year	$ 5,000,000	5,000,000
Restructured loans performance threshold (days) | d	90
Financing Receivable, Non-Troubled Debt Restructuring Modifications, Amount	$ 16,500,000	320,200,000
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 & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans | loans			8
Restructured loans, Restructured loans, Pre-Modification Loan Balance		14,984,000	$ 25,009,000
Restructured loans, Period End Balance		$ 14,984,000	$ 25,071,000
Financing Receivable, Modifications, Number of Contracts | loans	7	8
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 9,311,000
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 8,039,000
Commercial & industrial | 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		0	9
Restructured loans, Restructured loans, Pre-Modification Loan Balance		$ 0	$ 3,024,000
Restructured loans, Period End Balance		$ 0	$ 2,932,000
Financing Receivable, Modifications, Number of Contracts | loans	8
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 16,850,000
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 9,807,000
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans | loans		24	30
Restructured loans, Restructured loans, Pre-Modification Loan Balance		$ 1,953,000	$ 3,415,000
Restructured loans, Period End Balance		$ 1,847,000	$ 3,062,000
Financing Receivable, Modifications, Number of Contracts | loans	17
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 1,585,000
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 1,553,000
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans | loans		11	14
Restructured loans, Restructured loans, Pre-Modification Loan Balance		$ 351,000	$ 395,000
Restructured loans, Period End Balance		$ 349,000	$ 366,000
Financing Receivable, Modifications, Number of Contracts | loans	2
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 30,000
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 30,000
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured loans, Number of Loans | loans		2	2
Restructured loans, Restructured loans, Pre-Modification Loan Balance		$ 35,000	$ 41,000
Restructured loans, Period End Balance		$ 22,000	$ 39,000
Financing Receivable, Modifications, Number of Contracts | loans	1
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 0
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 0
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, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	$ 28,793	$ 25,919
Financing Receivable, Nonaccrual, No Allowance	19,599	54,833
Nonaccrual loans	48,392	80,752	$ 48,165
Restructured loans - accrual status	11,600	7,100	11,400
Interest income effect
Gross amount of interest that would have been recorded under original terms	5,132	5,892	5,813
Interest included in income
Nonaccrual loans	1,618	1,636	1,042
Restructured loans	314	426	801
Impaired Financing Receivable, Interest Income, Accrual Method	1,932	2,062	1,843
Net impact on interest income	3,200	3,830	3,970
Loans and Leases Receivable-Nonaccrual, future commitment to lend	0	0	3
Restructured loans - nonaccrual status	16,000	14,700	18,500
Commercial & industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	11,077	18,711
Financing Receivable, Nonaccrual, No Allowance	6,285	10,519
Nonaccrual loans	17,362	29,230	24,346
Interest included in income
Impaired Financing Receivable, Interest Income, Accrual Method			1,013
Lease financing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, No Allowance	203	0
Nonaccrual loans	203	0	223
Interest included in income
Impaired Financing Receivable, Interest Income, Accrual Method			0
Construction real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, No Allowance	0	0
Nonaccrual loans	0	0	0
Interest included in income
Impaired Financing Receivable, Interest Income, Accrual Method			0
Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	17,716	6,957
Financing Receivable, Nonaccrual, No Allowance	1,796	27,725
Nonaccrual loans	19,512	34,682	7,295
Interest included in income
Impaired Financing Receivable, Interest Income, Accrual Method			388
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	0	251
Financing Receivable, Nonaccrual, No Allowance	8,305	11,350
Nonaccrual loans	8,305	11,601	10,892
Interest included in income
Impaired Financing Receivable, Interest Income, Accrual Method			319
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, No Allowance	2,922	5,076
Nonaccrual loans	2,922	5,076	5,242
Interest included in income
Impaired Financing Receivable, Interest Income, Accrual Method			121
Installment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Nonaccrual, With Allowance	0	0
Financing Receivable, Nonaccrual, No Allowance	88	163
Nonaccrual loans	$ 88	$ 163	167
Interest included in income
Impaired Financing Receivable, Interest Income, Accrual Method			$ 2

LOANS - Investment in Impaired

LOANS - Investment in Impaired Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			$ 79,318
Total interest included in income	$ 1,932	$ 2,062	1,843
Commercial & industrial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			36,567
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			87
Total interest included in income			1,013
Lease financing
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			225
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			0
Total interest included in income			0
Construction real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			6
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			0
Total interest included in income			0
Commercial real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			20,096
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			31
Total interest included in income			388
Residential real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			16,361
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			12
Total interest included in income			319
Home equity
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			5,893
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			0
Total interest included in income			121
Installment
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			170
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			0
Total interest included in income			2
Nonperforming Financing Receivables With Related Allowance
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			6,563
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method			130
Loans with no related allowance recorded [member]
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			72,755
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			1,713
Loans with no related allowance recorded [member] | Commercial & industrial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			31,846
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			926
Loans with no related allowance recorded [member] | Lease financing
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			168
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			0
Loans with no related allowance recorded [member] | Construction real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			6
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			0
Loans with no related allowance recorded [member] | Commercial real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			18,757
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			357
Loans with no related allowance recorded [member] | Residential real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			15,915
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			307
Loans with no related allowance recorded [member] | Home equity
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			5,893
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			121
Loans with no related allowance recorded [member] | Installment
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			170
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method			2
Nonperforming Financing Receivables With Related Allowance | Commercial & industrial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			4,721
Nonperforming Financing Receivables With Related Allowance | Lease financing
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			57
Nonperforming Financing Receivables With Related Allowance | Construction real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			0
Nonperforming Financing Receivables With Related Allowance | Commercial real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			1,339
Nonperforming Financing Receivables With Related Allowance | Residential real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			446
Nonperforming Financing Receivables With Related Allowance | Home equity
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			0
Nonperforming Financing Receivables With Related Allowance | Installment
Financing Receivable, Impaired [Line Items]
Average Recorded Investment			$ 0

LOANS - Collateral Dependent Lo

LOANS - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 9,288,299	$ 9,900,970
Business assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13,171	36,803
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13,050	29,837
Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,973	3,269
Land
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	38	6,444
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	11,729	17,893
Other Property
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,431	5,055
Total Collateral
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	48,392	99,301
Commercial & industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	17,362	45,456
Commercial & industrial | Business assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13,171	30,961
Commercial & industrial | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	15	6,130
Commercial & industrial | Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	833	2,608
Commercial & industrial | Land
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	865
Commercial & industrial | Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Commercial & industrial | Other Property
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,343	4,892
Lease financing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	203
Lease financing | Business assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0
Lease financing | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0
Lease financing | Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	203
Lease financing | Land
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0
Lease financing | Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0
Lease financing | Other Property
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0
Commercial real estate-investor
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,784	27,282
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	6,362	20,212
Commercial real estate-investor | Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	661
Commercial real estate-investor | Land
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	5,537
Commercial real estate-investor | Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	422	872
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	12,728	9,723
Commercial real estate-owner | Business assets
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	5,842
Commercial real estate-owner | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,673	3,495
Commercial real estate-owner | Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,937	0
Commercial real estate-owner | Land
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	38	42
Commercial real estate-owner | Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	80	344
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	8,305	11,601
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	8,305	11,601
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	2,922	5,076
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	2,922	5,076
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	88	163
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	$ 88	$ 163

LOANS - Changes in Other Real E

LOANS - Changes in Other Real Estate Owned (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of year	$ 1,287	$ 2,033	$ 1,401
Additions	98	1,017	2,448
Proceeds from Sale of Other Real Estate	1,278	2,076	1,453
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Other Deduction	9	(313)	363
Balance at end of year	98	1,287	2,033
Commercial & industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additions	98	510	415
Proceeds from Sale of Other Real Estate	947	217	541
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Other Deduction	9	(448)	112
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additions	0	507	2,033
Proceeds from Sale of Other Real Estate	331	1,859	912
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Other Deduction	$ 0	$ 135	$ 251

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	Jan. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for loan and lease losses
Balance at beginning of year	$ 57,650	$ 175,679	$ 57,650	$ 56,542
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	61,505	61,505
Provision for loan and lease losses		(19,024)	70,796	30,598
Loans charged off		(32,903)	(21,359)	(35,565)
Recoveries		8,223	7,087	6,075
Total net charge-offs		24,680	14,272	29,490
Balance at end of year	119,155	131,992	175,679	57,650
Commercial & Industrial
Allowance for loan and lease losses
Balance at beginning of year	18,584	51,454	18,584	18,746
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	9,901	9,901
Provision for loan and lease losses		6,606	25,407	23,631
Loans charged off		(15,620)	(5,345)	(26,676)
Recoveries		1,612	2,907	2,883
Total net charge-offs		14,008	2,438	23,793
Balance at end of year	28,485	44,052	51,454	18,584
Lease financing
Allowance for loan and lease losses
Balance at beginning of year	971	995	971	1,130
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	118	118
Provision for loan and lease losses		621	758	3
Loans charged off		0	(852)	(162)
Recoveries		0	0	0
Total net charge-offs		0	852	162
Balance at end of year	1,089	1,633	995	971
Construction real estate
Allowance for loan and lease losses
Balance at beginning of year	2,381	21,736	2,381	3,413
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	11,579	11,579
Provision for loan and lease losses		(8,367)	7,759	(1,100)
Loans charged off		(1,498)	0	0
Recoveries		3	17	68
Total net charge-offs		1,495	(17)	(68)
Balance at end of year	13,960	11,874	21,736	2,381
Commercial real estate
Allowance for loan and lease losses
Balance at beginning of year	23,579	76,795	23,579	21,048
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	24,118	24,118
Provision for loan and lease losses		(14,689)	38,936	5,107
Loans charged off		(13,471)	(12,100)	(3,689)
Recoveries		4,785	2,262	1,113
Total net charge-offs		8,686	9,838	2,576
Balance at end of year	47,697	53,420	76,795	23,579
Residential
Allowance for loan and lease losses
Balance at beginning of year	5,299	8,560	5,299	4,964
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	5,490	5,490
Provision for loan and lease losses		(2,436)	(2,122)	739
Loans charged off		(127)	(488)	(677)
Recoveries		228	381	273
Total net charge-offs		(101)	107	404
Balance at end of year	10,789	6,225	8,560	5,299
Home equity
Allowance for loan and lease losses
Balance at beginning of year	4,787	11,869	4,787	5,348
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	8,430	8,430
Provision for loan and lease losses		(2,376)	(939)	695
Loans charged off		(1,073)	(1,541)	(2,591)
Recoveries		1,223	1,132	1,335
Total net charge-offs		(150)	409	1,256
Balance at end of year	13,217	9,643	11,869	4,787
Installment
Allowance for loan and lease losses
Balance at beginning of year	392	1,215	392	362
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	801	801
Provision for loan and lease losses		65	12	2
Loans charged off		(334)	(148)	(223)
Recoveries		151	158	251
Total net charge-offs		183	(10)	(28)
Balance at end of year	1,193	1,097	1,215	392
Credit card
Allowance for loan and lease losses
Balance at beginning of year	1,657	3,055	1,657	1,531
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	1,068	1,068
Provision for loan and lease losses		1,552	985	1,521
Loans charged off		(780)	(885)	(1,547)
Recoveries		221	230	152
Total net charge-offs		559	655	1,395
Balance at end of year	$ 2,725	$ 4,048	$ 3,055	$ 1,657

ALLOWANCE FOR CREDIT LOSSES -_2

ALLOWANCE FOR CREDIT LOSSES - Changes in the Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	Jan. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	$ 119,155	$ 131,992	$ 175,679	$ 57,650	$ 56,542
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	61,505	61,505
Commercial & Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	28,485	44,052	51,454	18,584	18,746
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	9,901	9,901
Lease financing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	1,089	1,633	995	971	1,130
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	118	118
Construction real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	13,960	11,874	21,736	2,381	3,413
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	11,579	11,579
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	47,697	53,420	76,795	23,579	21,048
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	24,118	24,118
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	10,789	6,225	8,560	5,299	4,964
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	5,490	5,490
Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	13,217	9,643	11,869	4,787	5,348
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	8,430	8,430
Installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	1,193	1,097	1,215	392	362
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	801	801
Credit card
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Allowance	2,725	4,048	$ 3,055	$ 1,657	$ 1,531
Loans and Leases:
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	$ 1,068	$ 1,068

ALLOWANCE FOR CREDIT LOSSES ALL

ALLOWANCE FOR CREDIT LOSSES ALLOWANCE FOR CREDIT LOSSES - Additional information (Details) - USD ($) $ in Thousands	Jan. 01, 2020	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Interest Receivable			$ 29,457	$ 37,700
Reserves for unfunded commitments			13,400	12,500
Off-Balance Sheet, Credit Loss, Liability, Change in Method, Credit Loss Expense (Reversal)	$ 12,155		12,200
Provision for Other Credit Losses		$ 900	$ 903	$ (237)	$ (165)

PREMISES AND EQUIPMENT - Schedu

PREMISES AND EQUIPMENT - Schedule of Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 313,921	$ 321,880
Less accumulated depreciation and amortization	120,881	114,669
Total premises and equipment	193,040	207,211
Depreciation	14,100	15,400	$ 16,100
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	49,402	52,373
Buildings [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	155,337	161,371
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	70,847	70,177
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	30,190	29,525
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 8,145	$ 8,434

LEASES - Lease Cost (Details)

LEASES - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Cost	$ 7,425	$ 7,897	$ 7,324
Short-term Lease, Cost	108	142	55
Variable Lease, Cost	2,621	2,532	2,553
Total operating lease cost	$ 10,154	$ 10,571	$ 9,932

LEASES - Lease Maturity (Detail

LEASES - Lease Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Lessee, Operating Lease, Liability, to be Paid, Year One	$ 7,784
Lessee, Operating Lease, Liability, to be Paid, Year Two	7,683
Lessee, Operating Lease, Liability, to be Paid, Year Three	7,288
Lessee, Operating Lease, Liability, to be Paid, Year Four	6,673
Lessee, Operating Lease, Liability, to be Paid, Year Five	6,269
Lessee, Operating Lease, Liability, to be Paid, after Year Five	50,311
Total lease payments	86,008
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	$ 18,456
Operating Lease, Liability	Other liabilities	Other liabilities

LEASES - Schedule of supplement

LEASES - Schedule of supplemental balance sheet information related to leases (Details)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	13 years 10 months 24 days	15 years 1 month 6 days	15 years 7 months 6 days
Operating Lease, Weighted Average Discount Rate, Percent	3.25%	3.07%	3.43%

LEASES - Supplemental cash flow

LEASES - Supplemental cash flow information related to leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Payments	$ 6,860	$ 8,196	$ 7,335
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 6,076	$ 9,725	$ 64,902

LEASES - Additional Information

LEASES - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating Lease, Liability	Other liabilities	Other liabilities
Operating Lease, Liability	Other liabilities	Other liabilities
Accrued interest and other liabilities
Leases [Abstract]
Operating Lease, Liability	Other liabilities
Operating Lease, Liability	Other liabilities
Accrued interest and other assets
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 57.2	$ 63.9
Operating Lease, Right-of-Use Asset	$ 57.2	$ 63.9

GOODWILL AND OTHER INTANGIBLE_3

GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL AND OTHER INTANGIBLE ASSETS-Schedule of Goodwill (Details) - USD ($) $ in Thousands	Aug. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Balance at beginning of year		$ 937,771	$ 937,771	$ 880,251
Goodwill	$ 57,500	62,978	0	57,520
Balance at end of year		$ 1,000,749	$ 937,771	$ 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, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 129,408	$ 100,564
Finite-Lived Intangible Assets, Accumulated Amortization	40,510	36,012
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	45,256	51,031
Finite-Lived Intangible Assets, Accumulated Amortization	26,911	27,524
Customer Lists
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	69,563	39,420
Finite-Lived Intangible Assets, Accumulated Amortization	8,362	4,778
Other
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	14,589	10,113
Finite-Lived Intangible Assets, Accumulated Amortization	$ 5,237	$ 3,710

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, 2021USD ($)
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Finite-Lived Intangible Asset, Expected Amortization, Year One	$ 11,515
Finite-Lived Intangible Asset, Expected Amortization, Year Two	10,536
Finite-Lived Intangible Asset, Expected Amortization, Year Three	9,193
Finite-Lived Intangible Asset, Expected Amortization, Year Four	9,145
Finite-Lived Intangible Asset, Expected Amortization, Year Five	$ 9,092

GOODWILL AND OTHER INTANGIBLE_6

GOODWILL AND OTHER INTANGIBLE ASSETS GOODWILL AND OTHER INTANGIBLE ASSETS--Additional Information (Details) - USD ($) $ in Thousands	Aug. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 57,500	$ 62,978	$ 0	$ 57,520
Intangible assets amortization		9,839	11,126	$ 9,671
Bank lines of credit credit		$ 23,030	$ 0
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization method		accelerated basis
Estimated weighted average life (in years)		6 years 2 months 12 days
Customer Lists
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization method		straight-line basis
Estimated weighted average life (in years)		11 years
Finite-lived Intangible Assets Acquired	$ 39,400

DEPOSITS (Details)

DEPOSITS (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deposits [Abstract]
Time Deposit Maturities, Year One	$ 1,131,574
Time Deposit Maturities, Year Two	83,589
Time Deposit Maturities, Year Three	50,983
Time Deposit Maturities, Year Four	32,569
Time Deposit Maturities, Year Five	31,352
Time Deposit Maturities, after Year Five	196
Time	$ 1,330,263	$ 1,872,733

DEPOSITS-Additional Information

DEPOSITS-Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deposits [Abstract]
Time Deposits, at or Above FDIC Insurance Limit	$ 195.6	$ 220.5

BORROWINGS - Schedule of Short-

BORROWINGS - Schedule of Short-term Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Short-term Debt [Line Items]
Short-term Debt	$ 296,203	$ 166,594	$ 1,316,181
Short-term debt interest rate	0.27%	0.05%	1.62%
Short-term debt, average for the year	$ 204,503	$ 590,903	$ 1,146,719
Short-term debt, average rate (as a percent)	0.10%	1.09%	1.90%
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Short-term Debt	$ 51,203	$ 166,594	$ 165,181
Short-term debt interest rate	0.01%	0.05%	0.85%
Short-term debt, average for the year	$ 160,967	$ 149,036	$ 155,859
Short-term debt, average rate (as a percent)	0.07%	0.26%	1.15%
Federal Home Loan Bank Borrowings [Member]
Short-term Debt [Line Items]
Short-term Debt	$ 225,000	$ 0	$ 1,151,000
Short-term debt interest rate	0.18%	0.00%	1.73%
Short-term debt, average for the year	$ 43,371	$ 441,867	$ 990,860
Short-term debt, average rate (as a percent)	0.20%	1.37%	2.37%
Short-term Debt
Short-term Debt [Line Items]
Short-term Debt	$ 20,000	$ 0	$ 0
Short-term debt interest rate	1.90%	0.00%	0.00%
Short-term debt, average for the year	$ 165	$ 0	$ 0
Short-term debt, average rate (as a percent)	1.92%	0.00%	0.00%

BORROWINGS BORROWINGS - Repurch

BORROWINGS BORROWINGS - Repurchase Agreements (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Securities Sold under Agreements to Repurchase	$ 51,203
Carrying Value of Securities Sold under Repurchase Agreements and Deposits Received for Securities Loaned	51,300	$ 126,700
Mortgage-backed securities
Securities Sold under Agreements to Repurchase	48,370
Collateralized Mortgage Obligations
Securities Sold under Agreements to Repurchase	$ 2,833

BORROWINGS - Schedule of Long-t

BORROWINGS - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Amount
Secured Debt	$ 0	$ 434,982
FHLB long-term advances	0	19,971
Subordinated Debt	313,248	321,384
Unamortized debt issuance costs	(2,384)	(2,770)
Other Long-term Debt	775	775
Long-term Debt and Lease Obligation	313,420	776,202
Notes Payable to Bank, Current	23,030	0
Notes Payable, Noncurrent	73,382	0
Notes Payable	96,412	0
Total long-term debt	$ 409,832	$ 776,202
Average Rate
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	0.00%	0.35%
Federal Home Loan Bank	0.00%	1.43%
Debt, Weighted Average Interest Rate	4.86%	4.86%
Lessee, Finance Lease, Discount Rate	3.81%	3.81%
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	0.00%	0.00%
Long term debt and Lease Obligation, interest rate at period end	4.88%
Debt Instrument, Interest Rate, Stated Percentage	2.77%	0.00%
Other Notes payable interest rate	4.09%	0.00%
Notes payable interest rate	3.77%	0.00%
Long-term Debt, Weighted Average Interest Rate, at Point in Time	4.62%	2.25%
Maturities of Long-term Debt [Abstract]
2022	$ 28,091
2023	15,086
2024	23,091
2025	12,301
2026	16,765
Thereafter	314,498
Long-term Debt [Member]
Amount
Finance Lease, Liability	$ 1,781	$ 1,860

BORROWINGS Borrowings - - Addit

BORROWINGS Borrowings - - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Secured Debt		$ 0	$ 434,982
Long Term Debt Percentage in Basis Points			35
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%
Subordinated Debt		$ 313,248	$ 321,384
Debt, Weighted Average Interest Rate		4.86%	4.86%
Notes Payable		$ 96,412	$ 0
Bank lines of credit credit		$ 23,030	$ 0
Debt Instrument, Interest Rate, Stated Percentage		2.77%	0.00%
Notes Payable, Noncurrent		$ 73,382	$ 0
Other Notes payable interest rate		4.09%	0.00%
Book value of FHLB collateral		$ 5,800,000
Federal Home Loan Bank		0.00%	1.43%
Line of Credit Facility, Maximum Borrowing Capacity		$ 40,000
Short-term Debt [Line Items]
Short-term Debt		296,203	$ 166,594	$ 1,316,181
Private Placement [Member]
Debt Instrument [Line Items]
Subordinated Debt		$ 8,400
Debt, Weighted Average Interest Rate		6.00%
Long-term Debt [Member]
Debt Instrument [Line Items]
Subordinated Borrowing, Interest Rate		5.25%
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, 2021USD ($)entity	Dec. 31, 2020USD ($)entity
Derivative [Line Items]
Number of counterparties | entity	6	20
Derivative Asset	$ 212,970	$ 272,499
Derivative Assets (Liabilities), at Fair Value, Net	(7)
Derivative Liability	212,977	272,606
Derivative, Notional Amount	$ 17,683,691	$ 11,875,690
Foreign Exchange [Member]
Derivative [Line Items]
Number of counterparties | entity	4	6
Credit Risk Contract [Member]
Derivative [Line Items]
Outstanding liability from counterparty contracts	$ 100	$ 300
Derivative, Notional Amount	362,800	242,400
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	45,000	114,200
Other Credit Derivatives [Member]
Derivative [Line Items]
Outstanding liability from counterparty contracts		2,700
Derivative, Notional Amount	62,500	112,600
Credit Risk Derivative Assets, at Fair Value	3,300
Derivative [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivative Liability	74,200	182,300
Derivative, Notional Amount	2,400,000	2,300,000
Derivative [Member] | Other Liabilities [Member] | Foreign Exchange [Member]
Derivative [Line Items]
Derivative Liability	15,200	33,100
Derivative, Notional Amount	$ 6,400,000	$ 3,600,000

DERIVATIVES - Summary of Deriva

DERIVATIVES - Summary of Derivative Financial Instruments and Balances (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 17,683,691	$ 11,875,690
Derivative Asset	212,970	272,499
Estimate Fair Value Loss	(212,977)	(272,606)
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,430,587	2,300,336
Derivative Asset	7,508	107
Estimate Fair Value Loss	(84,701)	(184,884)
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other assets
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,430,587	2,300,336
Derivative Asset	84,694	184,777
Estimate Fair Value Loss	(7,508)	(107)
Foreign Exchange [Member] | Matched interest rate swaps | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	6,399,432	3,637,509
Derivative Asset	52,780	27,249
Estimate Fair Value Loss	(67,988)	(60,366)
Foreign Exchange [Member] | Matched interest rate swaps | Accrued interest and other assets
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	6,423,085	3,637,509
Derivative Asset	67,988	60,366
Estimate Fair Value Loss	(52,780)	(27,249)
Derivative [Member] | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,400,000	2,300,000
Estimate Fair Value Loss	$ (74,200)	$ (182,300)

DERIVATIVES - Disclosure by Typ

DERIVATIVES - Disclosure by Type of Financial Instrument (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 212,977	$ 272,606
Derivative Liability, Fair Value, Gross Asset	(206,090)	(402,480)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	6,887
Derivative Asset, Fair Value, Amount Not Offset Against Collateral		(129,874)
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	92,209	184,991
Derivative Liability, Fair Value, Gross Asset	(149,647)	(385,088)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	(57,438)	(200,097)
Fair Value Hedges | Foreign Exchange [Member] | Accrued interest and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	120,768	87,615
Derivative Liability, Fair Value, Gross Asset	(56,443)	(17,392)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	$ 64,325	$ 70,223

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, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative, Notional Amount	$ 17,683,691	$ 11,875,690
Average Maturity (years)	2 years
Fair Value	$ (7)
Asset conversion swaps | Derivative Financial Instruments Receive Fixed Pay Variable
Derivative [Line Items]
Derivative, Notional Amount	$ 2,430,587
Average Maturity (years)	5 years 8 months 12 days
Fair Value	$ 77,186
Asset conversion swaps | Derivative Financial Instruments Receive Variable Pay Fixed
Derivative [Line Items]
Derivative, Notional Amount	$ 2,430,587
Average Maturity (years)	5 years 8 months 12 days
Fair Value	$ (77,193)
Foreign Exchange [Member] | Derivative Financial Instruments Receive Fixed Pay Variable
Derivative [Line Items]
Derivative, Notional Amount	$ 6,423,085
Average Maturity (years)	7 months 6 days
Fair Value	$ 15,208
Foreign Exchange [Member] | Derivative Financial Instruments Receive Variable Pay Fixed
Derivative [Line Items]
Derivative, Notional Amount	$ 6,399,432
Average Maturity (years)	7 months 6 days
Fair Value	$ (15,208)

RELATED PARTIES TRANSACTIONS (D

RELATED PARTIES TRANSACTIONS (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)
Loans to Related Parties [Roll Forward]
Beginning balance	$ 5,097
Additions	1,463
Deductions	(3,078)
Ending balance	3,482
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, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Commitments [Line Items]
Unused Commitments to Extend Credit	$ 3,248,931	$ 2,853,059
Loans and Leases Receivable, Net of Deferred Income	9,288,299	9,900,970
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments, Amortization	21,687	13,481	$ 10,143
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(21,270)	(13,144)	(10,089)
Low Income Housing Tax Credits
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments, Amortization	8,894	8,076	6,931
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(8,581)	(7,629)	(6,397)
Historic tax credit [Member]
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments, Amortization	1,116	474	2,862
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(263)	(563)	(3,342)
New Markets Tax Credit
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments, Amortization	210	175	350
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(210)	(175)	(350)
Renewable Energy Program [Member]
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments, Amortization	11,467	4,756	0
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(12,216)	(4,777)	$ 0
Commercial & industrial
Other Commitments [Line Items]
Unused Commitments to Extend Credit	1,545,995	1,270,765
Loans and Leases Receivable, Net of Deferred Income	2,720,028	3,007,509
Lease financing
Other Commitments [Line Items]
Unused Commitments to Extend Credit	18,037	0
Loans and Leases Receivable, Net of Deferred Income	109,624	72,987
Construction real estate
Other Commitments [Line Items]
Unused Commitments to Extend Credit	484,038	374,008
Loans and Leases Receivable, Net of Deferred Income	455,894	636,096
Commercial real estate-investor
Other Commitments [Line Items]
Unused Commitments to Extend Credit	65,660	139,754
Loans and Leases Receivable, Net of Deferred Income	3,154,755	3,244,540
Commercial real estate-owner
Other Commitments [Line Items]
Unused Commitments to Extend Credit	29,824	51,637
Loans and Leases Receivable, Net of Deferred Income	1,071,859	1,063,318
Residential real estate
Other Commitments [Line Items]
Unused Commitments to Extend Credit	50,043	28,895
Loans and Leases Receivable, Net of Deferred Income	896,069	1,003,086
Home equity
Other Commitments [Line Items]
Unused Commitments to Extend Credit	822,343	762,406
Loans and Leases Receivable, Net of Deferred Income	708,399	743,099
Installment
Other Commitments [Line Items]
Unused Commitments to Extend Credit	15,985	18,229
Loans and Leases Receivable, Net of Deferred Income	119,454	81,850
Credit card
Other Commitments [Line Items]
Unused Commitments to Extend Credit	217,006	207,365
Loans and Leases Receivable, Net of Deferred Income	$ 52,217	$ 48,485

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES - Investment Holdings Schedule (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	$ 134,035	$ 100,417
Qualified Affordable Housing Project Investments, Commitment	72,511	55,556
Amortization Method Qualified Affordable Housing Project Investments, Amortization	21,687	13,481	$ 10,143
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(21,270)	(13,144)	(10,089)
Low Income Housing Tax Credits
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	108,974	90,401
Qualified Affordable Housing Project Investments, Commitment	57,341	47,531
Amortization Method Qualified Affordable Housing Project Investments, Amortization	8,894	8,076	6,931
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(8,581)	(7,629)	(6,397)
Historic tax credit [Member]
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	2,581	3,607
Qualified Affordable Housing Project Investments, Commitment	56	364
Amortization Method Qualified Affordable Housing Project Investments, Amortization	1,116	474	2,862
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(263)	(563)	(3,342)
New Markets Tax Credit
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	3,895	1,165
Qualified Affordable Housing Project Investments, Commitment	0	0
Amortization Method Qualified Affordable Housing Project Investments, Amortization	210	175	350
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(210)	(175)	(350)
Renewable Energy Program [Member]
Summary of Investment Holdings [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	18,585	5,244
Qualified Affordable Housing Project Investments, Commitment	15,114	7,661
Amortization Method Qualified Affordable Housing Project Investments, Amortization	11,467	4,756	0
Affordable Housing Tax Credits and Other Tax Benefits, Amount	$ (12,216)	$ (4,777)	$ 0

COMMITMENTS AND CONTINGENCIES_3

COMMITMENTS AND CONTINGENCIES - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2020
Commitments and Contingencies Disclosure [Line Items]
Reserves for unfunded commitments	$ 13,400	$ 12,500
Loans and Leases Receivable, Commitments, Fixed Rates	129,200	123,600
Loans and Leases Receivable, Commitments, Variable Rates	$ 3,800,000	$ 3,300,000
Loan Commitments, Fixed Interest Rate Range, Minimum	0.00%	0.00%
Loan Commitments, Fixed Interest Rate Range, Maximum	21.00%	21.00%
Loan Commitments, Fixed Rate, Maturities, Minimum	1 year	1 year
Loan Commitments, Fixed Rate, Maturities, Maximum	30 years 10 months 24 days	30 years 9 months 18 days
Letters of credit issued to guarantee performance of a client to a third party	$ 41,100	$ 36,100
Derivative, Notional Amount	17,683,691	11,875,690
Litigation Settlement, Expense	7,100
Estimated Litigation Liability			$ 0
Credit Default Swap
Commitments and Contingencies Disclosure [Line Items]
Derivative, Notional Amount	362,800	242,400
Commitments to Extend Credit
Commitments and Contingencies Disclosure [Line Items]
Commitments outstanding to extend credit	$ 4,000,000	$ 3,400,000

INCOME TAXES (Detail)

INCOME TAXES (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current expense [Abstract]
Federal	$ 21,397	$ 34,632	$ 31,343
State	2,289	2,349	854
Total current expense	23,686	36,981	32,197
Deferred (benefit) expense [Abstract]
Federal	10,944	(8,624)	10,946
State	1,143	244	1,644
Total deferred (benefit) expense	12,087	(8,380)	12,590
Income tax expense	35,773	28,601	44,787
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income taxes computed at federal statutory rate (21%) on income before income taxes	50,596	38,726	51,001
Benefit from tax-exempt income	(5,613)	(5,901)	(5,964)
Tax credits	(21,561)	(13,064)	(10,075)
Basis reduction on tax credit	1,346	657	738
Tax benefit of equity compensation	(243)	340	(140)
State income taxes, net of federal tax benefit	2,711	2,049	1,973
Affordable housing investments	7,194	6,635	5,825
Other	1,343	(841)	1,429
Income tax expense	35,773	28,601	44,787
Deferred tax assets [Abstract]
Allowance for credit losses	29,754	39,671
Fair value adjustments on business combinations	0	3,870
Deferred compensation	292	235
Postretirement benefits other than pension liability	652	684
Accrued stock-based compensation	1,836	1,654
Other real estate owned write-downs	0	8
Interest on nonaccrual loans	442	1,712
Accrued expenses	7,286	5,647
State net operating loss	1,746	1,959
Deferred tax asset, Leasing liability	15,794	16,947
Federal tax credit carryforwards	3,049	2,854
Deferred Tax Assets, Deferred Income	0	1,691
Other	565	577
Total deferred tax assets	61,416	77,509
Deferred tax liabilities [Abstract]
Tax depreciation greater than book depreciation	(9,117)	(11,923)
FHLB and FRB stock	(3,836)	(4,043)
Mortgage-servicing rights	(3,518)	(2,925)
Leasing activities	(10,860)	(6,661)
Retirement obligations	13,754	10,984
Intangible assets	(16,081)	(13,942)
Deferred loan fees and costs	(933)	0
Prepaid expenses	(680)	(619)
Limited partnership investments	2,957	2,471
Unrealized gains on investment securities	(5,791)	(20,253)
Foreign exchange deferred income	(428)	(2,080)
Deferred Tax Liability, Unrealized gain/loss equity securities	(2,339)	(2,179)
Deferred tax liability, right of use asset	(13,390)	(15,053)
Other	(2,426)	(2,035)
Deferred Tax Liabilities, Gross	(93,010)	(95,168)
Total deferred tax liabilities	(31,594)	(17,659)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Balance at beginning of year	2,386	3,006
Decrease resulting from settlements	0	(620)
Balance at end of year	$ 2,386	$ 2,386	$ 3,006
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
Deferred Tax Assets Operating Loss Carryforwards State And Local Acquired	$ 2,300	$ 2,500
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
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	0	0
Fair value adjustments on business combinations	$ 6,900	$ 0

EMPLOYEE BENEFIT PLANS (Details

EMPLOYEE BENEFIT PLANS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Pension Cost (Reversal of Cost)	$ 3,365,000	$ 2,484,000	$ 1,041,000
Payment for Pension Benefits	$ 0	0	0
Defined Contribution Plan, Maximum Annual Contribution Percent by Employee	50.00%
Defined Contribution Plan, Cost	$ 0	0	0
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	0
Change in Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	0.0034
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	87,494,000	75,044,000
Service cost	9,128,000	7,932,000	6,591,000
Interest cost	2,157,000	2,455,000	2,778,000
Actuarial gain (loss)	2,588,000	9,171,000
Defined Benefit Plan, Benefit Obligation, Benefits Paid	8,096,000	7,108,000
Benefit obligation at end of year	93,271,000	87,494,000	75,044,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	155,704,000	141,816,000
Actual return on plan assets	15,774,000	20,996,000
Defined Benefit Plan, Plan Assets, Benefits Paid	8,096,000	7,108,000
Fair value of plan assets at end of year	163,382,000	155,704,000	141,816,000
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Assets	70,111,000	68,210,000
Liabilities	0	0
Net amount recognized	70,111,000	68,210,000
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), after Tax [Abstract]
Net actuarial loss	27,264,000	32,943,000
Net prior service cost	(270,000)	(682,000)
Deferred tax assets	(6,148,000)	(7,349,000)
Net amount recognized	20,846,000	24,912,000	27,941,000	$ 32,590,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(4,066,000)	(3,029,000)	(4,649,000)
Accumulated benefit obligation	92,316,000	86,327,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	9,128,000	7,932,000	6,591,000
Interest cost	2,157,000	2,455,000	2,778,000
Expected return on plan assets	(10,118,000)	(9,824,000)	(9,718,000)
Amortization of prior service cost	(413,000)	(413,000)	(413,000)
Defined Benefit Plan, Amortization of Gain (Loss)	2,611,000	2,334,000	1,803,000
Net periodic benefit (income) cost	3,365,000	2,484,000	1,041,000
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	(3,068,000)	(2,001,000)	(4,630,000)
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	413,000	413,000	413,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	(2,611,000)	(2,334,000)	(1,803,000)
Total recognized in accumulated other comprehensive income	(5,266,000)	(3,922,000)	(6,020,000)
Total recognized in net periodic benefit cost and accumulated other comprehensive income	$ (1,901,000)	$ (1,438,000)	$ (4,979,000)
Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	2.89%	2.55%	3.33%
Rate of compensation increase	3.50%	3.50%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate	2.58%	2.14%	2.82%
Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate	2.55%	3.33%	4.31%
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	2.14%	2.82%	3.61%
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2021	$ 5,753,000
2022	5,848,000
2023	6,664,000
2024	6,931,000
2025	7,099,000
Thereafter	$ 41,728,000

EMPLOYEE BENEFIT PLANS Defined

EMPLOYEE BENEFIT PLANS Defined Benefit Plan, Fair Value on Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	$ 163,382	$ 155,704	$ 141,816
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	146,648	151,511
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	16,734	4,193
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	163,382	155,704
Cash | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	122	129
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	122	129
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	3,535	4,193
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	3,535	4,193
Fixed income mutual funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	63,526	65,443
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	63,526	65,443
Equity mutual funds | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	83,000	85,939
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	83,000	$ 85,939
Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	0
Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	13,199
Defined Benefit Plan, Common Collective Trust | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value measurements	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	$ 13,199

REVENUE RECOGNITION (Details)

REVENUE RECOGNITION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue Recognition and Deferred Revenue [Abstract]
Interchange income	$ 27.9	$ 23.9	$ 30.4
Credit card expense	$ 13.6	$ 12.2	$ 11.9

ACCUMULATED OTHER COMPREHENSI_3

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Comprehensive Income (Loss), before Reclassification Adjustments and Tax [Abstract]
Unrealized gain (loss) on debt securities	$ (67,759)	$ 36,643	$ 65,858
Unrealized gain (loss) on derivatives			281
Retirement obligations	3,068	2,001	4,630
Total	(65,316)	38,644	70,769
Other Comprehensive Income (Loss) Reclassifications before Tax [Abstract]
Unrealized gain (loss) on debt securities	(759)	(4,563)	(370)
Unrealized gain (loss) on derivatives			0
Retirement obligation	2,198	1,921	1,390
Total	(2,957)	(6,484)	(1,760)
Transactions Pre-tax
Unrealized gain (loss) on debt securities	(67,000)	41,206	66,228
Unrealized gain (loss) on derivatives			281
Retirement obligation	5,266	3,922	6,020
Total	(62,359)	45,128	72,529
Transactions Tax-effect
Unrealized gain (loss) on debt securities	14,462	(8,894)	(14,269)
Unrealized gain (loss) on derivatives			(64)
Retirement obligation	(1,200)	(893)	(1,371)
Total	13,262	(9,787)	(15,704)
Transactions Net of tax
Unrealized gain (loss) on debt securities	(52,538)	32,312	51,959
Unrealized gain (loss) on derivatives			217
Retirement obligation	4,066	3,029	4,649
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(625)	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(625)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(625)
Other Comprehensive Income (Loss), Reclassification, Foreign Currency Transaction	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	(625)
Total	(49,097)	35,341	56,825
Cumulative effect of accounting change
Unrealized gain (loss) on debt securities			906
Unrealized gain (loss) on derivatives			0
Retirement obligation			0
Total			906
Balances Net of tax
Unrealized gain (loss) on debt securities	21,038	73,576	41,264	$ (11,601)
Unrealized gain (loss) on derivatives			0	(217)
Retirement obligation	(20,846)	(24,912)	(27,941)	(32,590)
Total	$ (433)	$ 48,664	$ 13,323	$ (44,408)

ACCUMULATED OTHER COMPREHENSI_4

ACCUMULATED OTHER COMPREHENSIVE INCOME AMOUNT RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Realized gains and losses on securities available for sale	$ (759)	$ (4,563)	$ (370)
Amortization of prior service cost	413	413	413
Recognized net actuarial loss	(2,611)	(2,334)	(1,803)
Other Comprehensive Income, Reclassification, Amortization of Defined Benefit Plans items, Pre-tax	(2,198)	(1,921)	(1,390)
Total reclassifications for the period, before tax	$ (2,957)	$ (6,484)	$ (1,760)

CAPITAL - Risk-Based Capital (D

CAPITAL - Risk-Based Capital (Details) $ in Thousands	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
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	$ 419,800
Banking Regulation, Risk-Based Information [Abstract]
Banking Regulation, Common Equity Tier One Risk-Based Capital, Actual	$ 1,262,789	$ 1,325,922
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Actual	0.1084	0.1182
Banking Regulation, Common Equity Tier One Risk-Based Capital, Capital Adequacy, Minimum	$ 815,197	$ 785,338
Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets	0.0700	0.0700
Banking Regulation, Tier One Risk-Based Capital [Abstract]
Banking Regulation, Tier One Risk-Based Capital, Actual	$ 1,306,571	$ 1,368,818
Banking Regulation, Tier One Risk-Based Capital Ratio, Actual	0.1122	0.1220
Banking Regulation, Tier One Risk-Based Capital, Capital Adequacy, Minimum	$ 989,882	$ 953,625
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	$ 1,642,549	$ 1,744,802
Banking Regulation, Total Risk-Based Capital Ratio, Actual	0.1410	0.1555
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum	$ 1,222,795	$ 1,178,007
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	$ 1,306,571	$ 1,368,818
Banking Regulation, Tier One Leverage Capital Ratio, Actual	0.0870	0.0955
Banking Regulation, Tier One Leverage Capital, Capital Adequacy, Minimum	$ 600,410	$ 573,526
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	$ 1,513,175	$ 1,452,403
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Actual	0.1301	0.1295
Banking Regulation, Common Equity Tier One Risk-Based Capital, Capital Adequacy, Minimum	$ 813,974	$ 784,807
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	$ 755,833	$ 728,749
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	$ 1,513,708	$ 1,452,507
Banking Regulation, Tier One Risk-Based Capital Ratio, Actual	0.1302	0.1296
Banking Regulation, Tier One Risk-Based Capital, Capital Adequacy, Minimum	$ 988,397	$ 952,980
Banking Regulation, Tier One Risk-Based Capital Ratio, Capital Adequacy, Minimum	0.0850	0.0850
Capital Required for Capital Adequacy to Risk Weighted Assets	$ 930,256	$ 896,922
Banking Regulation, Tier One Risk-Based Capital Ratio, Well Capitalized, Minimum	0.0800	0.0800
Banking Regulation, Total Capital [Abstract]
Banking Regulation, Total Capital, Actual	$ 1,589,570	$ 1,560,457
Banking Regulation, Total Risk-Based Capital Ratio, Actual	0.1367	0.1392
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum	$ 1,220,960	$ 1,177,211
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	$ 1,162,820	$ 1,121,153
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	$ 1,513,708	$ 1,452,507
Banking Regulation, Tier One Leverage Capital Ratio, Actual	0.1010	0.1014
Banking Regulation, Tier One Leverage Capital, Capital Adequacy, Minimum	$ 599,578	$ 573,094
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	$ 749,472	$ 716,367
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	Dec. 31, 2019	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	2,753,272
Treasury Stock Acquired, Average Cost Per Share	$ 23.33	$ 18.96	$ 24.05

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, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Noncash Expense		$ 9,635	$ 7,678	$ 7,969
Total unrecognized compensation cost		$ 10,200
Unrecognized compensation cost, period for recognition (in years)		1 year 11 months 4 days
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized		3,803,798
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		20,515	27,451
Activity for stock option plan [Roll Forward]
Outstanding at beginning of year (in shares)		27,451
Granted (in shares)		0	0	0
Exercised (in shares)		(6,936)
Forfeited or expired (in shares)		0
Outstanding at end of year (in shares)		20,515	27,451
Exercised (in shares)		20,515
Weighted average exercise price, outstanding at beginning of year (in dollars per share)		$ 10.53
Weighted average exercise price, granted (in dollars per share)		0
Weighted average exercise price, exercised (in dollars per share)		9.21
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)		10.98	$ 10.53
Weighted average exercise price, Exercisable (in dollars per share)		$ 10.98
Weighted average remaining contractual term, outstanding at end of year (in years)		1 year 9 months 10 days
Weighted average remaining contractual life, exercisable at end of year (in years)		1 year 9 months 10 days
Aggregate intrinsic value, outstanding at end of year		$ 275
Aggregate intrinsic value, exercisable at end of year		275
Share-based Payment Arrangement, Additional Disclosure [Abstract]
Total intrinsic value of options exercised		114	$ 86	$ 462
Proceeds from exercise of stock options		64	72	90
Share-based Payment Arrangement, Exercise of Option, Tax Benefit		2,229	1,776	1,844
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested in period, total fair value		$ 8,600	$ 6,100	$ 7,400
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	763,283	530,569	462,446
Number of shares granted		539,020	503,311	395,023
Number of shares vested		(386,848)	(233,828)	(295,633)
Number of shares forfeited		(75,722)	(36,769)	(31,267)
Number of shares nonvested at end of year		839,733	763,283	530,569
Weighted average of shares fair value, nonvested at beginning of year	$ 27.19	$ 22.04	$ 27.19	$ 26.39
Weighted average of shares fair value granted		22.69	18.62	26.55
Weighted average of shares fair value vested		22.24	26.07	24.94
Weighted average of shares fair value forfeited		22.86	23.79	28.63
Weighted average of shares fair value, nonvested at end of year		$ 22.30	$ 22.04	$ 27.19

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, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator for basic and diluted earnings per share -income available to common shareholders:
Net income	$ 205,160	$ 155,810	$ 198,075
Denominator for basic earnings per share - weighted average shares	95,034,690	97,363,952	98,305,570
Effect of dilutive securities -
Employee stock awards	862,695	729,146	545,901
Denominator for diluted earnings per share - adjusted weighted average shares	95,897,385	98,093,098	98,851,471
Basic	$ 2.16	$ 1.60	$ 2.01
Diluted	$ 2.14	$ 1.59	$ 2

EARNINGS PER COMMON SHARE - Add

EARNINGS PER COMMON SHARE - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
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, 2021	Dec. 31, 2020
Financial assets
Investment securities held-to-maturity	$ 98,420	$ 131,687
Other investments	102,971	133,198
Loans held for sale	29,500	41,100
Interest Receivable	29,457	37,700
Deposits
Noninterest-bearing	4,185,572	3,763,709
Savings	4,157,374	3,680,774
Time	1,330,263	1,872,733
Deposits	12,871,954	12,232,003
Impaired Commercial And Commercial Real Estate Loans Member
Deposits
Principal Amount of Commercial and Commercial Real Estate Loans	28,800	45,300
Allowance for Loan and Lease Losses, Real Estate	9,700	13,500
Carrying value
Financial assets
Cash and short-term investments	434,842	251,359
Investment securities held-to-maturity	98,420	131,687
Other investments	102,971	133,198
Loans and leases	9,156,307	9,725,291
Interest Receivable	44,627	50,903
Deposits
Deposits	12,871,954	12,232,003
Short-term borrowings	296,203	166,594
Long-term debt	409,832	776,202
Interest Payable	4,498	6,240
Fair value
Financial assets
Cash and short-term investments	434,842	251,359
Investment securities held-to-maturity	99,898	136,698
Other investments	102,971	133,198
Loans and leases	9,172,111	9,743,497
Interest Receivable	44,627	50,903
Deposits
Deposits	12,869,567	12,238,058
Short-term borrowings	296,203	166,594
Long-term debt	411,569	774,674
Interest Payable	4,498	6,240
Fair Value, Inputs, Level 1 [Member] | Fair value
Financial assets
Cash and short-term investments	434,842	251,359
Investment securities held-to-maturity	0	0
Other investments	1,331	837
Loans and leases	0	0
Interest Receivable	0	0
Deposits
Deposits	0	0
Short-term borrowings	296,203	166,594
Long-term debt	0	0
Interest Payable	0	14
Fair Value, Inputs, Level 2 [Member] | Fair value
Financial assets
Cash and short-term investments	0	0
Investment securities held-to-maturity	99,898	136,698
Other investments	92,025	122,953
Loans and leases	0	0
Interest Receivable	15,170	13,221
Deposits
Deposits	12,869,567	12,238,058
Short-term borrowings	0	0
Long-term debt	411,569	774,674
Interest Payable	4,498	6,226
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	9,615	9,408
Loans and leases	9,172,111	9,743,497
Interest Receivable		37,682
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, 2021	Dec. 31, 2020
Assets
Loans Held-for-sale, Fair Value Disclosure	$ 29,500	$ 41,100
Derivatives	212,970	272,499
Liabilities
Derivatives	212,977	272,606
Investment Securities, Available-for-sale	4,207,846	3,424,580
Impaired Commercial And Commercial Real Estate Loans Member
Liabilities
Principal Amount of Commercial and Commercial Real Estate Loans	28,800	45,300
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
Derivatives		0
Total	34,776	103
Liabilities
Total	0	0
Investment Securities, Available-for-sale	34,776	103
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 [Member] | Fair value
Assets
Loans Held-for-sale, Fair Value Disclosure	29,482	41,103
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 [Member]
Assets
Derivatives		185,032
Total	4,377,467	3,697,652
Liabilities
Total	213,212	273,739
Investment Securities, Available-for-sale	4,134,889	3,383,902
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
Derivatives		0
Total	38,181	40,575
Liabilities
Total	0	0
Investment Securities, Available-for-sale	38,181	40,575
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Assets
Loans Held-for-sale, Fair Value Disclosure	29,482	41,103
Derivatives		185,032
Total	4,450,424	3,738,330
Liabilities
Total	213,212	273,739
Investment Securities, Available-for-sale	4,207,846	3,424,580
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	92,328
Liabilities
Derivatives	92,444	186,124
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	92,328
Liabilities
Derivatives	92,444	186,124
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	120,768	87,615
Liabilities
Derivatives	120,768	87,615
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	120,768	87,615
Liabilities
Derivatives	$ 120,768	$ 87,615

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, 2021	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Beginning balance	$ 40,575	$ 9,190
Accretion (amortization)	(38)	1
Increase (decrease) fair value	44	(17)
Settlements	(2,400)	31,401
Ending balance	$ 38,181	$ 40,575

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, 2021	Dec. 31, 2020
Fair Value, Inputs, Level 1 [Member] | Real Estate Acquired in Satisfaction of Debt
Assets
Total	$ 0	$ 0
Fair Value, Inputs, Level 1 [Member] | Commercial & industrial
Assets
Total	0	0
Fair Value, Inputs, Level 1 [Member] | Commercial real estate
Assets
Total	0	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 & industrial
Assets
Total	0	0
Fair Value, Inputs, Level 2 [Member] | Commercial real estate
Assets
Total	0	0
Fair Value, Inputs, Level 3 [Member] | Real Estate Acquired in Satisfaction of Debt
Assets
Total	0	54
Fair Value, Inputs, Level 3 [Member] | Commercial & industrial
Assets
Total	4,449	25,367
Fair Value, Inputs, Level 3 [Member] | Commercial real estate
Assets
Total	$ 14,618	$ 6,432

FAIR VALUE DISCLOSURES (Details

FAIR VALUE DISCLOSURES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Loans Held-for-sale, Fair Value Disclosure	$ 29.5	$ 41.1
Financing Receivable, Held-for-Sale	27.2	35.5
Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables	2.3	5.6
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ (3.3)	$ 4.6

BUSINESS COMBINATIONS - Additio

BUSINESS COMBINATIONS - Additional Information - Narrative (Details) - USD ($) $ in Thousands	Aug. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Cash consideration	$ 53,700
Stock consideration	60,900
Payments for Merger Related Costs		$ 2,600
Total assets acquired	74,900	185,800
Total liabilities assumed	18,400	125,894	$ 0	$ 18,380
Business Combination, Acquired Direct Financing Lease Receivable		42,300
Business Combination, Acquired Receivables, Gross Contractual Amount		73,900
Goodwill	57,500	62,978	$ 0	$ 57,520
Bannockburn [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 114,600
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

BUSINESS COMBINATION BUSINESS C

BUSINESS COMBINATION BUSINESS COMBINATIONS (Details) - USD ($) $ in Thousands	Aug. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Cash consideration	$ 53,700
Stock consideration	60,900
Total assets acquired	74,900	$ 185,800
Total liabilities assumed	18,400	125,894	$ 0	$ 18,380
Goodwill	$ 57,500	$ 62,978	$ 0	$ 57,520

FIRST FINANCIAL BANCORP. (PAR_3

FIRST FINANCIAL BANCORP. (PARENT COMPANY ONLY) FINANCIAL INFORMATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Cash	$ 220,031	$ 231,054	$ 200,691	$ 236,221
Other investments	102,971	133,198
Premises and equipment	193,040	207,211
Total assets	16,329,141	15,973,134
Short-term Debt	296,203	166,594	1,316,181
Subordinated Debt	313,248	321,384
Other liabilities	492,210	516,265
Total liabilities	14,070,199	13,691,064
Shareholders’ equity	2,258,942	2,282,070	2,247,705	2,078,249
Total liabilities and shareholders’ equity	16,329,141	15,973,134
Income Statement [Abstract]
Noninterest income	171,506	189,123	131,373
Interest Expense	31,099	68,452	123,324
Salaries and employee benefits	245,924	236,779	209,061
Professional services	11,676	9,961	11,254
Income before income taxes and equity in undistributed net earnings of subsidiaries	240,933	184,411	242,862
Income tax expense (benefit)	35,773	28,601	44,787
Net income	205,160	155,810	198,075
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	156,063	191,151	254,900
Operating activities
Net income	205,160	155,810	198,075
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	32,136	33,337	28,138
Stock-based compensation expense	9,635	7,678	7,969
Equity Securities, FV-NI, Unrealized Gain (Loss)	(702)	(9,045)	(575)
Deferred income taxes	12,087	(8,380)	12,590
Decrease (increase) in other assets	138,225	(288,857)	(165,902)
Net cash provided by (used in) operating activities	390,462	109,888	186,329
Investing activities
Net cash acquired (paid) in business combinations	(109,024)	0	(51,663)
Proceeds from sales and maturities of investment securities	1,139,498	904,821	557,034
Payments to Acquire Debt Securities, Available-for-sale	(2,418,290)	(1,551,952)	(834,743)
Net cash provided by (used in) investing activities	(512,334)	(1,204,871)	(252,424)
Financing activities
Net (decrease) increase in short-term borrowings	129,609	(1,149,587)	275,490
Cash dividends paid on common stock	(87,316)	(89,691)	(89,097)
Treasury stock purchase	(108,077)	(16,686)	(66,218)
Proceeds from exercise of stock options, net of shares purchased	64	72	90
Net cash provided by (used in) financing activities	110,849	1,125,346	30,565
Cash and due from banks at beginning of year	231,054	200,691	236,221
Cash and due from banks at end of year	220,031	231,054	200,691
Parent Company [Member]
Statement of Financial Position [Abstract]
Cash	49,746	172,902	55,869	$ 86,878
Other investments	1,836	1,388
Subordinated notes from subsidiaries	7,500	7,500
Premises and equipment	1,311	1,328
Other assets	77,132	68,812
Total assets	2,595,037	2,607,498
Short-term Debt	20,000	0
Subordinated Debt	310,864	320,615
Dividends payable	1,042	674
Other liabilities	4,189	4,139
Total liabilities	336,095	325,428
Shareholders’ equity	2,258,942	2,282,070
Total liabilities and shareholders’ equity	2,595,037	2,607,498
Income Statement [Abstract]
Interest income	34	27	30
Noninterest income	663	272	191
Dividends from subsidiaries	202,000	81,725	196,800
Total income	202,697	82,024	197,021
Interest Expense	15,900	14,172	9,552
Salaries and employee benefits	9,784	8,004	8,169
Professional services	2,343	1,160	1,040
Other	5,186	5,163	6,599
Total expenses	33,213	28,499	25,360
Income before income taxes and equity in undistributed net earnings of subsidiaries	169,484	53,525	171,661
Income tax expense (benefit)	(7,787)	(6,145)	(5,975)
Equity in undistributed earnings (loss) of subsidiaries	(27,889)	(96,140)	(20,439)
Net income	205,160	155,810	198,075
Operating activities
Net income	205,160	155,810	198,075
Adjustments to reconcile net income to net cash provided by operating activities
Equity in undistributed earnings (loss) of subsidiaries	(27,889)	(96,140)	(20,439)
Depreciation and amortization	859	712	584
Stock-based compensation expense	9,635	7,678	7,969
Equity Securities, FV-NI, Unrealized Gain (Loss)	(448)	(272)	(191)
Deferred income taxes	(224)	(158)	1,255
(Decrease) increase in dividends payable	368	(175)	384
(Decrease) increase in other liabilities	(751)	(22)	(244)
Decrease (increase) in other assets	(8,096)	8,907	(6,996)
Net cash provided by (used in) operating activities	178,614	76,340	180,397
Investing activities
Capital contributions to subsidiaries	(113,152)	0	0
Net cash acquired (paid) in business combinations	0	0	(53,660)
Proceeds from sales and maturities of investment securities	0	0	264
Payments to Acquire Debt Securities, Available-for-sale	0	0	(500)
Net cash provided by (used in) investing activities	(113,152)	0	(53,896)
Financing activities
Net (decrease) increase in short-term borrowings	20,000	0	0
Proceeds from Issuance of Subordinated Long-term Debt	(10,592)	150,000	0
Cash dividends paid on common stock	(87,316)	(89,691)	(89,097)
Treasury stock purchase	(108,077)	(16,686)	(66,218)
Proceeds from exercise of stock options, net of shares purchased	64	72	90
Other	(2,697)	(3,002)	(2,285)
Net cash provided by (used in) financing activities	(188,618)	40,693	(157,510)
Net increase (decrease) in cash	(123,156)	117,033	(31,009)
Cash and due from banks at beginning of year	172,902	55,869	86,878
Cash and due from banks at end of year	49,746	172,902	$ 55,869
Commercial Banks [Member] | Parent Company [Member]
Statement of Financial Position [Abstract]
Investment in subsidiaries	2,447,095	2,346,009
Nonbanks [Member] | Parent Company [Member]
Statement of Financial Position [Abstract]
Investment in subsidiaries	10,417	9,559
Subsidiaries [Member] | Parent Company [Member]
Statement of Financial Position [Abstract]
Investment in subsidiaries	$ 2,457,512	$ 2,355,568