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Fair Value Measurements - Summary of fair value of interest rate option and investments in RETV ventures (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Investments $ 24,591 $ 12,500
Fair Value, Recurring    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Interest rate options 29,547 13,315
Fair Value, Recurring | Level 1 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Interest rate options 0 0
Fair Value, Recurring | Level 2 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Interest rate options 29,547 13,315
Fair Value, Recurring | Level 3 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Interest rate options 0 0
Fair Value, Recurring | RET Ventures [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Investments [1] 4,497 2,293
Fair Value, Recurring | RET Ventures [Member] | Level 1 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Investments [1] 0 0
Fair Value, Recurring | RET Ventures [Member] | Level 2 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Investments [1] 0 0
Fair Value, Recurring | RET Ventures [Member] | Level 3 [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Investments [1] $ 0 $ 0
[1]

 

(1)

Investments measured at fair value using the NAV practical expedient are not classified in the fair value hierarchy.