Earnings Per Share - Summary of Basic and Diluted Earnings Per Common Share (Parenthetical) (Detail) - shares	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Unvested Performance-Based Long Term Incentive Plan [Member]
Earnings Per Share Basic And Diluted [Line Items]
Antidilutive securities excluded from computation of earnings per share amount	155,994	43,424	155,994	43,424
Underlying Unsettled Forward Sales Transactions [Member]
Earnings Per Share Basic And Diluted [Line Items]
Antidilutive securities excluded from computation of earnings per share amount	3,499,697	2,397,232	2,549,697	2,397,232

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration