Quarterly report pursuant to Section 13 or 15(d)

Temporary Equity and Stockholders' Equity - Summary of Accumulated but Unpaid Preferred Dividends (Detail)

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Temporary Equity and Stockholders' Equity - Summary of Accumulated but Unpaid Preferred Dividends (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Class of Stock [Line Items]            
Distributed $ (7,897) $ (7,532) $ (7,393) $ (7,139) $ (6,701) $ (6,652)
Series A Preferred Stock [Member]            
Class of Stock [Line Items]            
Beginning balance 39,812 37,298 34,812 30,041 27,826 25,610
Accumulated 2,656 2,514 2,486 2,385 2,215 2,216
Distributed (42,468) 0 0 0 0 0
Ending balance 0 39,812 37,298 32,426 30,041 27,826
Series A One Preferred Stock [Member]            
Class of Stock [Line Items]            
Beginning balance 23,969 21,274 18,608 13,512 11,153 8,794
Accumulated 2,880 2,695 2,666 2,548 2,359 2,359
Distributed (26,849) 0 0 0 0 0
Ending balance 0 23,969 21,274 16,060 13,512 11,153
Series B Preferred Stock [Member]            
Class of Stock [Line Items]            
Beginning balance 38,474 36,151 33,910 29,495 27,391 25,338
Accumulated 2,361 2,323 2,241 2,180 2,104 2,053
Distributed (40,835) 0 0 0 0 0
Ending balance $ 0 $ 38,474 $ 36,151 $ 31,675 $ 29,495 $ 27,391