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Stockholders' Equity - Summary of Changes in Stockholders' Equity (Parenthetical) (Detail) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Equity [Abstract]        
Dividends declared per share $ 0.39 $ 0.37 $ 0.78 $ 0.74