Debt - Mortgage Notes Payable - Summary of Debt Extinguishment Costs on Mortgages Recorded as Additional Interest Expense (Details) - Mortgages [Member] - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Extinguishment Of Debt [Line Items]
Prepayment premiums/penalties	$ 327	$ 3,381
Write-offs of unamortized deferred financing costs	63	2,273
Write-offs of unamortized (premiums)/discounts/OCI	(190)	6,153
Total	$ 200	$ 11,807

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

Name:	us-gaap_WriteOffOfDeferredDebtIssuanceCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration