Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Class A Common Stock	Capital Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2024	$ 3,110,661	$ 2,978	$ 13,319	$ 3,333,669	$ (99,380)	$ (139,925)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	94,798			94,798
Other comprehensive income	49,060					49,060
Purchase treasury stock	0				0
Cash dividends paid on common stock ($0.12 per share)	(12,121)			(12,121)
Stock-based compensation	934		934
Issuance under equity compensation plans	295		(132)		427
Ending balance at Mar. 31, 2025	3,243,627	2,978	14,121	3,416,346	(98,953)	(90,865)
Beginning balance at Dec. 31, 2025	3,783,977	3,182	419,421	3,477,408	(99,162)	(16,872)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	111,088			111,088
Other comprehensive income	(37,179)					(37,179)
Purchase treasury stock	(31,143)				(31,143)
Cash dividends paid on common stock ($0.12 per share)	(28,935)			(28,935)
Stock-based compensation	1,004		1,004
Issuance under equity compensation plans	(487)		2	3	(492)
Ending balance at Mar. 31, 2026	$ 3,798,326	$ 3,182	$ 420,427	$ 3,559,565	$ (130,797)	$ (54,051)