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Debt | 12 Months Ended
--- | ---
Dec. 31, 2023
Debt Disclosure [Abstract] |
Debt | Debt The following table summarizes the Company’s Debt:
|  | December 31,
|  | 2022 |  | 2023
Senior bank debt |  | $ | 349.9 |  |  | $ | 349.9 |
Senior notes |  | 1,095.2 |  |  | 1,096.9 |
Junior subordinated notes |  | 751.6 |  |  | 751.8 |
Junior convertible securities |  | 338.6 |  |  | 338.9 |
Debt |  | $ | 2,535.3 |  |  | $ | 2,537.5 |
Senior Bank Debt The Company has a $1.25 billion revolver and a $350.0 million senior unsecured term loan facility (the “term loan” and, together with the revolver, the “credit facilities”). The revolver matures on October 25, 2027 and the term loan matures on October 23, 2026. Subject to certain conditions, the Company may increase the commitments under the revolver by up to an additional $500.0 million and may borrow up to an additional $75.0 million under the term loan. The Company pays interest on any outstanding obligations under the credit facilities at specified rates, currently based either on an applicable term-SOFR plus a SOFR adjustment of 0.10%, or prime rate, plus a marginal rate determined based on its credit rating. As of December 31, 2023, the interest rate for the Company’s outstanding borrowings under the term loan was term-SOFR plus a SOFR adjustment of 0.10%, plus the marginal rate of 0.85%. The credit facilities contain financial covenants with respect to leverage and interest coverage, as well as customary affirmative and negative covenants, including limitations on priority indebtedness, asset dispositions, and fundamental corporate changes, and certain customary events of default. As of December 31, 2022 and 2023, the Company had no outstanding borrowings under the revolver. As of December 31, 2022 and 2023, the Company had outstanding borrowings under the term loan of $350.0 million, and the weighted average interest rate on outstanding borrowings was 5.27% and 6.31%, respectively. The Company pays commitment fees on the unused portion of its revolver. For the years ended December 31, 2022 and 2023, these fees amounted to $1.3 million. Senior Notes As of December 31, 2023, the Company had senior notes outstanding, the respective principal terms and effective interest rates of which are presented below:
|  | 2024 Senior Notes |  | 2025 Senior Notes |  | 2030 Senior Notes
Issue date |  | February 2014 |  | February 2015 |  | June 2020
Maturity date |  | February 2024 |  | August 2025 |  | June 2030
Par value (in millions) |  | $ | 400.0 |  |  | $ | 350.0 |  |  | $ | 350.0 |
Stated coupon |  | 4.25 | % |  | 3.50 | % |  | 3.30 | %
Coupon frequency |  | Semi-annually |  | Semi-annually |  | Semi-annually
Potential call date |  | Any time |  | Any time |  | Any time
Call price |  | As defined |  | As defined |  | As defined
Effective interest rate |  | 4.44 | % |  | 3.67 | % |  | 3.39 | %
The senior notes may be redeemed, in whole or in part, at any time, in the case of the 2024 and 2025 senior notes, and at any time prior to March 15, 2030, in the case of the 2030 senior notes. In each case, the senior notes may be redeemed at a make-whole redemption price, plus accrued and unpaid interest. The make-whole redemption price, in each case, is equal to the greater of 100% of the principal amount of the notes to be redeemed and the remaining principal and interest payments on the notes being redeemed (excluding accrued but unpaid interest to, but not including, the redemption date) discounted to their present value as of the redemption date at the applicable treasury rate plus 0.25%, in the case of the 2024 and the 2025 senior notes, and to their present value as of the redemption date on a semi-annual basis at the applicable treasury rate plus 0.40%, in the case of the 2030 senior notes. On February 15, 2024, the Company’s $400.0 million 4.25% senior notes due 2024 matured and were fully repaid. Junior Subordinated Notes As of December 31, 2023, the Company had junior subordinated notes outstanding, the respective principal terms and effective interest rates of which are presented below:
|  | 2059 Junior Subordinated Notes |  | 2060 Junior Subordinated Notes |  | 2061 Junior Subordinated Notes
Issue date |  | March 2019 |  | September 2020 |  | July 2021
Maturity date |  | March 2059 |  | September 2060 |  | September 2061
Par value (in millions) |  | $ | 300.0 |  |  | $ | 275.0 |  |  | $ | 200.0 |
Stated coupon |  | 5.875 | % |  | 4.75 | % |  | 4.20 | %
Coupon frequency |  | Quarterly |  | Quarterly |  | Quarterly
Potential call date |  | March 2024 |  | September 2025 |  | September 2026
Call price |  | As defined |  | As defined |  | As defined
Listing |  | NYSE |  | NYSE |  | NYSE
Effective interest rate |  | 5.91 | % |  | 4.78 | % |  | 4.23 | %
The junior subordinated notes may be redeemed at any time, in whole or in part, on or after March 30, 2024, in the case of the 2059 junior subordinated notes, on or after September 30, 2025, in the case of the 2060 junior subordinated notes, and on or after September 30, 2026, in the case of the 2061 junior subordinated notes. In each case, the junior subordinated notes may be redeemed at 100% of the principal amount of the notes being redeemed, plus any accrued and unpaid interest thereon. Prior to the applicable redemption date, at the Company’s option, the applicable junior subordinated notes may also be redeemed, in whole but not in part, at 100% of the principal amount, plus any accrued and unpaid interest, if certain changes in tax laws, regulations, or interpretations occur; or at 102% of the principal amount, plus any accrued and unpaid interest, if a rating agency makes certain changes relating to the equity credit criteria for securities with features similar to the applicable notes. The Company may, at its option, and subject to certain conditions and restrictions, defer interest payments subject to the terms of the junior subordinated notes. Junior Convertible Securities As of December 31, 2023, the Company had $341.7 million of principal outstanding in its 5.15% junior convertible trust preferred securities (the “junior convertible securities”), maturing in 2037. The junior convertible securities bear interest at a rate of 5.15% per annum, payable quarterly in cash. As of December 31, 2022 and 2023, the unamortized issuance costs related to the junior convertible securities were $3.1 million and $2.9 million, respectively. The following table presents interest expense recorded in connection with the junior convertible securities:
|  | For the Years Ended December 31,
|  | 2021 |  | 2022 |  | 2023
Contractual interest expense |  | $ | 22.2 |  |  | $ | 18.3 |  |  | $ | 17.6 |
Amortization of debt issuance costs |  | 0.4 |  |  | 0.2 |  |  | 0.2 |
Amortization of debt discount |  | 3.1 |  |  | — |  |  | — |
Total |  | $ | 25.7 |  |  | $ | 18.5 |  |  | $ | 17.8 |
Effective interest rate |  | 5.99 | % |  | 5.21 | % |  | 5.21 | %
Holders of the junior convertible securities have no rights to put these securities to the Company. The holder may convert the securities to 0.2558 shares of common stock per $50.00 junior convertible security, equivalent to an adjusted conversion price of $195.47 per share. The conversion rate is subject to adjustments as described in the Amended and Restated Declaration of Trust of AMG Capital Trust II and the related indenture, both dated October 17, 2007 and filed as exhibits to this Annual Report on Form 10-K. Upon conversion, holders will receive cash or shares of the Company’s common stock, or a combination thereof, at the Company’s election. The Company may redeem the junior convertible securities if the closing price of its common stock for 20 trading days in a period of 30 consecutive trading days exceeds 130% of the then prevailing conversion price, and may also repurchase junior convertible securities in the open market or in privately negotiated transactions from time to time at management’s discretion. The junior convertible securities are considered contingent payment debt instruments under federal income tax regulations, which require the Company to deduct interest in an amount greater than its reported interest expense. The Company estimates that these deductions will generate annual deferred tax liabilities of approximately $9 million. For the year ended December 31, 2022, the Company repurchased a portion of its junior convertible securities for a purchase price of $60.9 million and as a result of these repurchases, the Company reduced its Deferred income tax liability (net) by $11.4 million. The Company did not repurchase any of its junior convertible securities during the year ended December 31, 2023.

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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://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 470 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//470/tableOfContent Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1C -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1C Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1C -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1C Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1C -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1C Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I + Details
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