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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2022
Derivative Instrument Detail [Abstract] |
Carrying Amounts and Estimated Fair Value of Financial Instruments | Carrying amounts and estimated fair values of our financial instruments as of December 31 are as follows:
|  | 2022 |  |  | 2021 |
(in thousands) |  | Carrying Amount |  |  | Fair Value |  |  | Carrying Amount |  |  | Fair Value |
Derivative assets related to interest rate swaps (Level 2) |  | $ | 144,583 |  |  | $ | 144,583 |  |  | $ | 33,497 |  |  | $ | 33,497 |
Derivative liabilities related to interest rate swaps (Level 2) |  | $ | — |  |  | $ | — |  |  | $ | (24,060 | ) |  | $ | (24,060 | )
Long-term debt, including current portion (Level 2): |  |  |  |  |  |  |  |  |  |  |  |
Term loans |  | $ | (969,269 | ) |  | $ | (961,632 | ) |  | $ | (691,119 | ) |  | $ | (705,135 | )
Revenue bonds |  |  | (65,735 | ) |  |  | (64,602 | ) |  |  | (65,735 | ) |  |  | (69,278 | )
Medium-term notes |  |  | — |  |  |  | — |  |  |  | (3,000 | ) |  |  | (3,007 | )
Total long-term debt 1 |  | $ | (1,035,004 | ) |  | $ | (1,026,234 | ) |  | $ | (759,854 | ) |  | $ | (777,420 | )
Company owned life insurance (Level 3) |  | $ | 4,311 |  |  | $ | 4,311 |  |  | $ | 3,923 |  |  | $ | 3,923 |
1 | The carrying amount of long-term debt includes principal and unamortized discounts.

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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