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Stockholders' Equity - Summary of Dividends Declared on its Outstanding Shares of Common Stock to its Shareholders (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Equity [Abstract]                              
Dividends per share declared on outstanding common stock (in dollars per share) $ 0.29 $ 0.16 $ 0.16 $ 0.16 $ 0.29 $ 0.16 $ 0.14 $ 0.14 $ 0.27 $ 0.14 $ 0.14 $ 0.14 $ 0.77 $ 0.73 $ 0.69
Aggregate amount $ 9,516 $ 5,476 $ 5,545 $ 5,572 $ 10,130 $ 5,592 $ 4,920 $ 4,904 $ 9,392 $ 4,830 $ 4,887 $ 4,932 $ 26,119 $ 25,556 $ 24,051