Capital Stock - Schedule of Common Stock Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Common Stock Activity [Roll Forward]
Beginning balance (in shares)	39,260,080
Beginning balance, Treasury (in shares)	(22,821,311)
Stock options exercised (in shares)	12,776	10,666	31,394
Ending balance (in shares)	38,912,629	39,260,080
Ending balance, Treasury (in shares)	(23,168,762)	(22,821,311)
Common stock
Common Stock Activity [Roll Forward]
Purchase of treasury shares (in shares)		166,292	0
Common stock
Common Stock Activity [Roll Forward]
Beginning balance (in shares)	62,081,391	62,081,391	62,081,391
Beginning balance	$ 329,953	$ 312,324	$ 281,980
Ending balance (in shares)	62,081,391	62,081,391	62,081,391
Ending balance	$ 343,842	$ 329,953	$ 312,324
Treasury Stock, Common
Common Stock Activity [Roll Forward]
Beginning balance, Treasury (in shares)	(22,821,311)	(22,764,179)	(22,868,327)
Beginning balance	$ (396,604)	$ (361,684)	$ (359,838)
Ending balance, Treasury (in shares)	(23,168,762)	(22,821,311)	(22,764,179)
Ending balance	$ (483,248)	$ (396,604)	$ (361,684)
Restricted Stock | Common stock
Common Stock Activity [Roll Forward]
Restricted stock awards	(1,288)	(842)	(643)
Restricted stock expense	12,202	15,769	9,476
Restricted stock forfeitures	$ (2,223)	$ (4,530)	$ (1,414)
Restricted Stock | Treasury Stock, Common
Common Stock Activity [Roll Forward]
Restricted stock awards (in shares)	69,691	52,098	40,856
Restricted stock awards	$ 1,288	$ 842	$ 643
Stock options | Common stock
Common Stock Activity [Roll Forward]
Restricted stock expense		41	11
Restricted stock forfeitures	(1)	(41)	(11)
Stock options exercised	$ 334	$ 327	$ 970
Stock options | Treasury Stock, Common
Common Stock Activity [Roll Forward]
Stock options exercised (in shares)	12,776	10,666	31,394
Stock options exercised	$ 235	$ 174	$ 503
Performance stock | Common stock
Common Stock Activity [Roll Forward]
Restricted stock expense	8,041	8,394	23,546
Restricted stock forfeitures	(3,179)	(1,634)	(1,585)
Performance stock issued	$ (2,109)	$ (1,256)	$ (855)
Performance stock | Treasury Stock, Common
Common Stock Activity [Roll Forward]
Performance stock issued (in shares)	118,605	77,544	53,407
Performance stock issued	$ 2,109	$ 1,256	$ 855
Employee Stock Purchase Plan | Common stock
Common Stock Activity [Roll Forward]
Employee stock purchase plan shares issued	$ 1,756	$ 1,215	$ 849
Employee Stock Purchase Plan | Treasury Stock, Common
Common Stock Activity [Roll Forward]
Employee stock purchase plan (in shares)	15,278	8,871	7,140
Employee stock purchase plan shares issued	$ 286	$ 148	$ 114
Treasury shares purchased | Treasury Stock, Common
Common Stock Activity [Roll Forward]
Purchase of treasury shares (in shares)	62,381	40,019	28,649
Treasury shares purchased	$ (10,570)	$ (7,408)	$ (3,961)
Share repurchase program | Common stock
Common Stock Activity [Roll Forward]
Employee stock purchase plan expense	356	186
Share Repurchase Program | Treasury Stock, Common
Common Stock Activity [Roll Forward]
Restricted stock expense	$ (79,992)	$ (29,932)
Purchase of treasury shares (in shares)	501,420	(166,292)