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Debt | 12 Months Ended
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Dec. 31, 2022
Debt Disclosure [Abstract] |
Debt | Debt Long-term debt consisted of the following (in thousands):
| December 31,
| 2022 |  | 2021
Bank credit facility - term loan | $ | 100,000 |  |  | $ | 60,175 |
Bank credit facility - revolver loans | 188,610 |  |  | 226,559 |
Principal amount of long-term debt | 288,610 |  |  | 286,734 |
Less debt issuance costs | (2,310) |  |  | (2,165) |
Total long-term debt | 286,300 |  |  | 284,569 |
Less current portion | (10,000) |  |  | (14,162) |
Long-term debt, net of current portion | $ | 276,300 |  |  | $ | 270,407 |
As of December 31, 2022, the interest rate on our outstanding term debt and weighted average interest rate on our aggregate outstanding revolver debt was 6.93% and 7.01%, respectively. Interest expense incurred on bank credit facilities was approximately $17.4 million, $11.2 million and $12.7 million for the years ended December 31, 2022, 2021 and 2020, respectively. We have a loan agreement with a group of banks from which we borrow amounts under the loan agreement to provide working capital support, fund letters of credit, and finance acquisitions. The loan agreement includes term and revolving loan facilities. The revolving loan facility provides for revolving loans and letters of credit. The maximum amount of credit available under the loan agreement for revolving loans and letters of credit is $350 million. Under the loan agreement we may elect to increase the maximum availability of the term loan facility, the revolving loan facility, or both facilities up to an aggregate additional amount of $100 million subject to lender approvals. The loan agreement also provides for letters of credit aggregating up to $25 million. As of December 31, 2022 and 2021, we had approximately $1.0 million in letters of credit outstanding. On October 7, 2022, we entered into the Fourth Amendment to our loan agreement which, among other things, (i) extended the maturity date from July 23, 2024 to October 7, 2025; (ii) reset the aggregate principal amount of the term loan to $100 million, (iii) modified the quarterly amortization payments on the term loan from $3.75 million to $2.50 million, (iv) increased the maximum Total Funded Debt to EBITDA Ratio from 4.25x to 4.50x, with such ratios decreasing thereafter, (v) changed the benchmark rate from LIBOR to Secured Overnight Financing Rate (SOFR) with a SOFR floor of 0%; and (vi) modified pricing to account for the change from LIBOR to SOFR. Borrowings under our loan agreement bear interest at a variable rate of interest based on Term SOFR or a base rate, plus in each case an applicable margin (based on our Total Funded Debt to EBITDA Ratio). The base rate for any day is a fluctuating rate per annum equal to the highest of (i) the Federal Funds Rate plus .50%; (ii) the Prime Rate and (iii) the sum of Term SOFR for a one month interest period, plus the difference between the additional Term SOFR interest margin for SOFR rate loans and the additional base rate interest margin for base rate loans. The applicable margins for SOFR loans ranges from 1.50% to 3.75% and .50% to 2.75% for base rate loans. We also pay a commitment fee with respect to undrawn amounts under the revolving loan facility ranging from .25% to .50% (based on our Total Funded Debt to EBITDA Ratio) and fees on letters of credit that are issued. We incurred and deferred $1.1 million of debt issuance costs in connection with the Fourth Amendment to our loan agreement, which are amortized to interest expense over the remaining term of the loan. Amortization of debt issuance costs was $1.0 million, $1.0 million, $1.1 million for the years ended December 31, 2022, 2021 and 2020, respectively. Future required term and revolver loan payments as of December 31, 2022 are as follows (in thousands):
Year Ending |  | Term |  | Revolver |  | Total
2023 |  | $ | 10,000 |  |  | $ | — |  |  | $ | 10,000 |
2024 |  | 10,000 |  |  | — |  |  | 10,000 |
2025 |  | 80,000 |  |  | 188,610 |  |  | 268,610 |
Total |  | $ | 100,000 |  |  | $ | 188,610 |  |  | $ | 288,610 |
The loan agreement contains collateral requirements to secure our loan agreement obligations, restrictive covenants, a limit on annual dividends, and other affirmative and negative covenants, conditions, and limitations. Restrictive covenants include a maximum Total Funded Debt to EBITDA Ratio and a minimum Fixed Charge Coverage Ratio. We were in compliance with required ratios and other terms and conditions as of December 31, 2022.

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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 https://asc.fasb.org/topic&trid=2208564 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1C -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495334-112611 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1I -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1I -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(c)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1C -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495334-112611 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1C -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495334-112611 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1E -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1I -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 + Details
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