Stockholders' Equity - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net income	$ 14,423	$ 88,916	$ 71,211	$ 73,795	$ 61,366	$ 48,545	$ 174,549	$ 183,705
Denominator:
Basic weighted average shares outstanding	110,140,496			115,344,015			112,609,684	115,455,543
Effect of dilutive securities:
Diluted weighted average shares outstanding	110,300,017			115,625,760			112,787,994	115,767,426
Basic earnings per share	$ 0.13			$ 0.64			$ 1.55	$ 1.59
Diluted earnings per share	$ 0.13			$ 0.64			$ 1.55	$ 1.59
Stock appreciation rights [Member]
Effect of dilutive securities:
Dilutive securities	85,396			171,514			101,967	190,680
Restricted stock [Member]
Effect of dilutive securities:
Dilutive securities	74,125			110,231			76,343	121,203