Shareholders' Equity (Deficit) - Schedule of Cash Dividends Declared and Distributed Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Stockholders Equity [Abstract]
Dividend declared per common share	$ 1.04	$ 1.04	$ 0.78	$ 0.78	$ 0.78	$ 0.78	$ 0.68	$ 0.68	$ 0.68	$ 0.68	$ 0.58	$ 0.58	$ 3.64	$ 2.92	$ 2.52
Cash dividends declared, Amount	$ 86,475	$ 86,476	$ 64,863	$ 65,947	$ 65,029	$ 65,830	$ 57,360	$ 59,233	$ 58,176	$ 58,176	$ 49,613	$ 55,339	$ 303,761	$ 247,452	$ 221,304
Cash dividends distributed, Amount	85,973	85,961	64,489	66,153	64,653	65,454	57,068	59,455	57,916	57,882	49,365	57,988	302,576	246,630	223,151
Cash dividends (released)/deferred, Amount	$ 502	$ 515	$ 374	$ (206)	$ 376	$ 376	$ 292	$ (222)	$ 260	$ 294	$ 248	$ (2,649)	$ 1,185	$ 822	$ (1,847)