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, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator:
Net income available to common shareholders	$ 40,553	$ 86,998	$ 89,070	$ 65,266	$ 77,036	$ 41,131	$ 216,620	$ 183,433
Denominator:
Basic weighted average shares outstanding	108,258,401			108,583,009			108,529,825	108,707,699
Effect of dilutive securities:
Diluted weighted average shares outstanding	108,379,416			108,702,495			108,659,118	108,829,374
Basic earnings per share	$ 0.37			$ 0.6			$ 2	$ 1.69
Diluted earnings per share	$ 0.37			$ 0.6			$ 1.99	$ 1.69
Stock appreciation rights [Member]
Effect of dilutive securities:
Dilutive securities	38,602			80,256			54,679	72,580
Restricted stock [Member]
Effect of dilutive securities:
Dilutive securities	82,413			39,230			74,614	49,095