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Borrowings | 12 Months Ended
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Dec. 31, 2020
Borrowings [Abstract] |
Borrowings | 10. Borrowings Short-Term Borrowings In addition to the liquidity provided by balance sheet cash flows, liquidity must also be supplemented with additional sources such as credit lines from correspondent banks as well as borrowings from the FHLB and the Federal Reserve Bank. Other funding alternatives may also be appropriate from time to time, including wholesale and retail repurchase agreements and brokered certificate of deposit (“CD”) accounts. Short-term borrowings totaled $168.4 million and $655.3 million at December 31, 2020 and 2019, respectively, and consist of Federal funds purchased and securities sold under repurchase agreements, which generally represent overnight borrowing transactions and other short-term borrowings, primarily FHLB advances, with original maturities of one year or less. The Company has unused lines of credit with the FHLB and access to brokered deposits available for short-term financing. Those sources totaled approximately $3.1 billion and $2.4 billion at December 31, 2020 and 2019, respectively. Borrowings on the FHLB lines are secured by FHLB stock, certain securities and one-to-four family first lien mortgage loans. Securities collateralizing repurchase agreements are held in safekeeping by nonaffiliated financial institutions and are under the Company’s control. Information related to short-term borrowings is summarized as follows as of December 31:
(Dollars in thousands) |  | 2020 |  |  | 2019 |  |  | 2018 |
Federal funds purchased: |  |  |  |  |  |  |  |  |
Balance at year-end |  | $ | - |  |  | $ | 65,000 |  |  | $ | 80,000 |
Average during the year |  |  | 14,727 |  |  |  | 47,137 |  |  |  | 66,839 |
Maximum month end balance |  |  | 40,000 |  |  |  | 80,000 |  |  |  | 80,000 |
Weighted average rate during the year |  |  | 2.05 | % |  |  | 3.90 | % |  |  | 3.43 | %
Weighted average rate at year-end |  |  | - |  |  |  | 2.84 | % |  |  | 4.25 | %
Securities sold under repurchase agreements: |  |  |  |  |  |  |  |  |  |  |  |
Balance at year-end |  | $ | 143,386 |  |  | $ | 143,775 |  |  | $ | 160,696 |
Average during the year |  |  | 154,383 |  |  |  | 123,337 |  |  |  | 146,135 |
Maximum month end balance |  |  | 176,840 |  |  |  | 146,410 |  |  |  | 170,350 |
Weighted average rate during the year |  |  | 0.17 | % |  |  | 0.33 | % |  |  | 0.16 | %
Weighted average rate at year-end |  |  | 0.20 | % |  |  | 0.40 | % |  |  | 0.38 | %
Other short-term borrowings: |  |  |  |  |  |  |  |  |  |  |  |
Balance at year-end |  | $ | 25,000 |  |  | $ | 446,500 |  |  | $ | 631,000 |
Average during the year |  |  | 183,699 |  |  |  | 403,453 |  |  |  | 514,662 |
Maximum month end balance |  |  | 366,500 |  |  |  | 576,000 |  |  |  | 653,000 |
Weighted average rate during the year |  |  | 1.55 | % |  |  | 1.85 | % |  |  | 1.56 | %
Weighted average rate at year-end |  |  | 1.99 | % |  |  | 1.73 | % |  |  | 1.82 | %
See Note 4 for additional information regarding securities pledged as collateral for securities sold under the repurchase agreements. Long-Term Debt Long-term debt consists of obligations having an original maturity at issuance of more than one year. A majority of the Company’s long-term debt is comprised of FHLB advances collateralized by the FHLB stock owned by the Company, and a blanket lien on its residential real estate mortgage loans. As of December 31, 2020 the Company had no callable long-term debt. A summary is as follows:
(Dollars in thousands) | December 31, 2020 |  | December 31, 2019
Maturity | Amount | Weighted Average Rate |  | Amount | Weighted Average Rate
2020 | $ | - | - |  | $ | 25,000 | 2.34%
2021 |  | 25,003 | 2.56% |  |  | 25,021 | 2.56%
2022 |  | 10,598 | 2.53% |  |  | 10,598 | 2.53%
2031 |  | 3,496 | 2.45% |  |  | 3,592 | 2.45%
Total | $ | 39,097 |  |  | $ | 64,211 |
Subordinated Debt On June 23, 2020, the Company issued $100.0 million aggregate principal amount of 5.00% fixed-to-floating rate subordinated notes due 2030. The subordinated notes, which qualify as Tier 2 capital, bear interest at an annual rate of 5.00%, payable semi-annually in arrears commencing on January 1, 2021, and a floating rate of interest equivalent to the three-month Secured Overnight Financing Rate (“SOFR”) plus a spread of 4.85%, payable quarterly in arrears commencing on October 1, 2025. The subordinated notes issuance costs of $2.2 million are being amortized on a straight-line basis into interest expense over five years. The Company may redeem the subordinated notes (1) in whole or in part beginning with the interest payment date of July 1, 2025, and on any interest payment date thereafter or (2) in whole but not in part upon the occurrence of a “Tax Event”, a “Tier 2 Capital Event” or in the event the Company is required to register as an investment company pursuant to the Investment Company Act of 1940, as amended. The redemption price for any redemption is 100% of the principal amount of the subordinated notes being redeemed, plus accrued and unpaid interest thereon to, but excluding, the date of redemption. Any redemption of the subordinated notes will be subject to the receipt of the approval of the Board of Governors of the Federal Reserve System to the extent then required under applicable laws or regulations, including capital regulations. The following table summarizes the Company’s subordinated debt:
(Dollars in thousands) |  |  |  |  | December 31, 2020 |
Subordinated notes issued June 2020 – fixed interest rate of 5.00% through June 2025 and a variable interest rate equivalent to three-month SOFR plus 4.85% thereafter, maturing July 1, 2030 |  |  | - |  |  | $ | 100,000 |
Unamortized debt issuance costs |  |  |  |  |  |  | (1,948 | )
Total subordinated debt, net |  |  |  |  |  | $ | 98,052 |
Junior Subordinated Debt The Company sponsors five business trusts, CNBF Capital Trust I, NBT Statutory Trust I, NBT Statutory Trust II, Alliance Financial Capital Trust I and Alliance Financial Capital Trust II (collectively, the “Trusts”). The Company’s junior subordinated debentures include amounts related to the Company’s NBT Statutory Trust I and II as well as junior subordinated debentures associated with one statutory trust affiliate that was acquired from our merger with CNB Financial Corp. and two statutory trusts that were acquired from our acquisition of Alliance Financial Corporation (“Alliance”). The Trusts were formed for the purpose of issuing company-obligated mandatorily redeemable trust preferred securities to third-party investors and investing in the proceeds from the sale of such preferred securities solely in junior subordinated debt securities of the Company for general corporate purposes. The Company guarantees, on a limited basis, payments of distributions on the trust preferred securities and payments on redemption of the trust preferred securities. The Trusts are VIEs for which the Company is not the primary beneficiary, as defined by GAAP. In accordance with GAAP, the accounts of the Trusts are not included in the Company’s consolidated financial statements. See Note 1 for additional information about the Company’s consolidation policy. The debentures held by each trust are the sole assets of that trust. The Trusts hold, as their sole assets, junior subordinated debentures of the Company with face amounts totaling $98.0 million at December 31, 2020. The Company owns all of the common securities of the Trusts and has accordingly recorded $3.2 million in equity method investments classified as other assets in our consolidated balance sheets at December 31, 2020. The Company owns all of the common stock of the Trusts, which have issued trust preferred securities in conjunction with the Company issuing trust preferred debentures to the Trusts. The terms of the trust preferred debentures are substantially the same as the terms of the trust preferred securities. As of December 31, 2020, the Trusts had the following trust preferred securities outstanding and held the following junior subordinated debentures of the Company (dollars in thousands):
Description | Issuance Date |  | Trust Preferred Securities Outstanding |  | Interest Rate |  | Trust Preferred Debt Owed To Trust |  | Final Maturity Date
CNBF Capital Trust I | August 1999 |  | $ | 18,000 |  | 3-month LIBOR plus 2.75% |  | $ | 18,720 |  | August 2029
NBT Statutory Trust I | November 2005 |  |  | 5,000 |  | 3-month LIBOR plus 1.40% |  |  | 5,155 |  | December 2035
NBT Statutory Trust II | February 2006 |  |  | 50,000 |  | 3-month LIBOR plus 1.40% |  |  | 51,547 |  | March 2036
Alliance Financial Capital Trust I | December 2003 |  |  | 10,000 |  | 3-month LIBOR plus 2.85% |  |  | 10,310 |  | January 2034
Alliance Financial Capital Trust II | September 2006 |  |  | 15,000 |  | 3-month LIBOR plus 1.65% |  |  | 15,464 |  | September 2036
The Company’s junior subordinated debentures are redeemable prior to the maturity date at our option upon each trust’s stated option repurchase dates and from time to time thereafter. These debentures are also redeemable in whole at any time upon the occurrence of specific events defined within the trust indenture. Our obligations under the debentures and related documents, taken together, constitute a full and unconditional guarantee by the Company of the issuers’ obligations under the trust preferred securities. The Company owns all of the common stock of the Trusts, which have issued trust preferred securities in conjunction with the Company issuing trust preferred debentures to the Trusts. The terms of the trust preferred debentures are substantially the same as the terms of the trust preferred securities. With respect to the Trusts, the Company has the right to defer payments of interest on the debentures issued to the Trusts at any time or from time to time for a period of up to ten consecutive semi-annual periods with respect to each deferral period. Under the terms of the debentures, if in certain circumstances there is an event of default under the debentures or the Company elects to defer interest on the debentures, the Company may not, with certain exceptions, declare or pay any dividends or distributions on its capital stock or purchase or acquire any of its capital stock. Despite the fact that the Trusts are not included in the Company’s consolidated financial statements, $97 million of the $101 million in trust preferred securities issued by these subsidiary trusts is included in the Tier 1 capital of the Company for regulatory capital purposes as allowed by the Federal Reserve Board (NBT Bank owns $1.0 million of CNBF Trust I securities). The Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 requires bank holding companies with assets greater than $500 million to be subject to the same capital requirements as insured depository institutions, meaning, for instance, that such bank holding companies will not be able to count trust preferred securities issued after May 19, 2010 as Tier 1 capital. The aforementioned Trusts are grandfathered with respect to this enactment based on their date of issuance.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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