Net Income Per Common Share - Computations of Basic and Diluted Income (Loss) Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Earnings Per Share Reconciliation [Abstract]
Net income		$ 97,052	$ 92,138
Participating earnings	[1]	(299)	(600)
Basic net income attributed to common shareholders		96,753	91,538
Reallocation of participating earnings	[1]	2	4
Diluted net income attributed to common shareholders		$ 96,755	$ 91,542
Net income per common share:
Basic		$ 0.4	$ 0.38
Diluted		$ 0.4	$ 0.38

[1] Restricted Stock Liability Awards (discussed in Note 9) represent participating securities because they participate in non-forfeitable dividends or distributions with common equity owners. Income allocable to participating securities represents the distributed and undistributed earnings attributable to the participating securities. Participating securities, however, do not participate in undistributed net losses.