Fair Value Measurements - Summary of fair value of interest rate option and investments in RETV ventures (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investments		$ 12,500	$ 12,500
Fair Value Measurements Recurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Interest rate options		44,241	13,315
Fair Value Measurements Recurring [Member] | Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Interest rate options		0	0
Fair Value Measurements Recurring [Member] | Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Interest rate options		44,241	13,315
Fair Value Measurements Recurring [Member] | Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Interest rate options		0	0
Fair Value Measurements Recurring [Member] | RET Ventures [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investments	[1]	2,342	2,293
Fair Value Measurements Recurring [Member] | 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 Measurements Recurring [Member] | 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 Measurements Recurring [Member] | 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.