Redeemable Preferred Stocks - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2020 shares
Series E Redeemable Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred stock cumulative dividend rate	14.00%
Participating right in dividends and liquidating distributions expressed in number of common shares	303,646
Series E Redeemable Preferred Stock [Member] | April 2021
Class Of Stock [Line Items]
Increase in preferred stock cumulative dividend rate	0.50%
Series E Redeemable Preferred Stock [Member] | April 2022
Class Of Stock [Line Items]
Increase in preferred stock cumulative dividend rate	0.50%
Series E Redeemable Preferred Stock [Member] | April 2023
Class Of Stock [Line Items]
Increase in preferred stock cumulative dividend rate	1.00%
Series F Redeemable Preferred Stock [Member]
Class Of Stock [Line Items]
Common stock voting rights shares	456,225
Voting rights description	As of June 30, 2020, the Series F Redeemable Preferred has voting rights to vote as a single class on all matters which the common stock have the right to vote and is entitled to a number of votes equal to 456,225 shares of our common stock.