Quarterly report pursuant to Section 13 or 15(d)

Debt, Net - Fair Value of Debt (Details)

v3.22.1
Debt, Net - Fair Value of Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Carrying Amount    
Carrying amount and estimated fair value of debt    
Long-term debt $ 2,156,784 $ 2,272,304
Carrying Amount | Unsecured senior notes    
Carrying amount and estimated fair value of debt    
Long-term debt 1,776,247 1,775,504
Carrying Amount | Other fixed-rate debt    
Carrying amount and estimated fair value of debt    
Long-term debt 87,046 87,713
Carrying Amount | Variable-rate secured debt    
Carrying amount and estimated fair value of debt    
Long-term debt 293,491 409,087
Estimated Fair Value    
Carrying amount and estimated fair value of debt    
Long-term debt 2,158,183 2,306,928
Estimated Fair Value | Unsecured senior notes    
Carrying amount and estimated fair value of debt    
Long-term debt 1,779,846 1,809,950
Estimated Fair Value | Other fixed-rate debt    
Carrying amount and estimated fair value of debt    
Long-term debt 84,608 87,339
Estimated Fair Value | Variable-rate secured debt    
Carrying amount and estimated fair value of debt    
Long-term debt $ 293,729 $ 409,639