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Stock Transactions and Unit Redemptions - Summary of Changes in Carrying Amount of FPUs (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Redeemable Partnership Interest[Roll Forward]    
Balance at beginning of period $ 20,674 $ 23,638
Consolidated net income allocated to FPUs 2,031 815
Earnings distributions (957) (815)
FPUs exchanged (1,129) (1,682)
FPUs redeemed (1,858) (1,282)
Balance at end of period $ 18,761 $ 20,674