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, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Numerator:
Net income available to common shareholders	$ 51,770	$ 75,909	$ 60,434	$ 40,553	$ 86,998	$ 89,070	$ 188,113	$ 216,620
Denominator:
Basic weighted average shares outstanding	107,244,573			108,258,401			107,217,689	108,529,825
Effect of dilutive securities:
Diluted weighted average shares outstanding	107,332,641			108,379,416			107,304,543	108,659,118
Basic earnings per share	$ 0.48			$ 0.37			$ 1.75	$ 2
Diluted earnings per share	$ 0.48			$ 0.37			$ 1.75	$ 1.99
Stock appreciation rights [Member]
Effect of dilutive securities:
Dilutive securities	31,206			38,602			31,002	54,679
Restricted stock [Member]
Effect of dilutive securities:
Dilutive securities	56,862			82,413			55,852	74,614