Earnings Per Share - Summary of Basic and Diluted Earnings Per Common Share (Parenthetical) (Detail) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Unvested Restricted Shares [Member]
Earnings Per Share Basic And Diluted [Line Items]
Antidilutive securities excluded from computation of earnings per share amount		78,449
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	43,424	284,471
Unsettled Forward Sale Transactions [Member]
Earnings Per Share Basic And Diluted [Line Items]
Antidilutive securities excluded from computation of earnings per share amount	523,397	300,000