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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Class of Stock [Line Items] |  |
Preferred Stock, Shares Issued | 12,600,000 | 12,600,000
Preferred Stock, Shares Outstanding | 12,600,000 | 12,600,000
Trust shares, par value (in dollars per share) | $ 0 |
Trust shares, authorized (shares) | 500,000,000 | 500,000,000
Trust shares, issued (shares) | 69,450,000 | 68,738,000
Trust shares, outstanding (shares) | 69,450,000 | 68,738,000
Preferred Stock, Shares Authorized | 50,000,000 | 50,000,000
Preferred Stock, Shares Issued | 12,600,000 | 12,600,000
Preferred Stock, Shares Outstanding | 12,600,000 | 12,600,000
Accounts Receivable, Allowance for Credit Loss | $ 14,018 | $ 13,851
Accumulated Amortization, Debt Issuance Costs, Noncurrent | $ 6,202 | $ 6,589
Series A Preferred Stock |  |
Class of Stock [Line Items] |  |
Preferred Stock, Shares Issued | 4,000,000 | 4,000,000
Preferred Stock, Shares Outstanding | 4,000,000 | 4,000,000
Preferred Stock, No Par Value | $ 0 |
Preferred Stock, Shares Issued | 4,000,000 | 4,000,000
Preferred Stock, Shares Outstanding | 4,000,000 | 4,000,000
Series B Preferred Stock [Member] |  |
Class of Stock [Line Items] |  |
Preferred Stock, Shares Issued | 4,000,000 | 4,000,000
Preferred Stock, Shares Outstanding | 4,000,000 | 4,000,000
Preferred Stock, No Par Value | $ 0 |
Preferred Stock, Shares Issued | 4,000,000 | 4,000,000
Preferred Stock, Shares Outstanding | 4,000,000 | 4,000,000
Series C Preferred Stock [Member] |  |
Class of Stock [Line Items] |  |
Preferred Stock, Shares Issued | 4,600,000 | 4,600,000
Preferred Stock, Shares Outstanding | 4,600,000 | 4,600,000
Preferred Stock, No Par Value | $ 0 | $ 0
Preferred Stock, Shares Issued | 4,600,000 | 4,600,000
Preferred Stock, Shares Outstanding | 4,600,000 | 4,600,000

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