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Fair Value Measurements - Fair Value of Debt (Details) - Fixed Rate Debt - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	$ 1,361,000	$ 1,371,000
Long-Term Debt, Fair Value by Fair Value Hierarchy Level	us-gaap:FairValueInputsLevel2Member	us-gaap:FairValueInputsLevel2Member
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	$ 1,296,325	$ 1,295,867

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

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- Definition

Indicates level within fair value hierarchy of long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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