Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Common Stock, Shares, Outstanding	47,618,626		47,618,626			49,243,813
Cash dividends declared per common share (in dollars per share)	$ 0.64	$ 0.59	$ 1.28	$ 1.18
Stockholders' Equity Attributable to Parent	$ 3,512,363	$ 3,074,856	$ 3,512,363	$ 3,074,856	$ 3,542,041	$ 3,565,728	$ 3,033,392	$ 2,993,120
Held In Rabbi Trust At Cost [Member]
Stockholders' Equity Attributable to Parent	(3,508)	(3,459)	(3,508)	(3,459)	(3,622)	(3,452)	(3,524)	(3,383)
Retained Earnings
Stockholders' Equity Attributable to Parent	1,369,306	1,217,959	1,369,306	1,217,959	1,317,946	1,269,113	1,192,008	1,172,724
Deferred Compensation, Share-based Payments [Member]
Stockholders' Equity Attributable to Parent	3,508	3,459	3,508	3,459	3,622	3,452	3,524	3,383
AOCI Attributable to Parent [Member]
Stockholders' Equity Attributable to Parent	(58,666)	(58,083)	(58,666)	(58,083)	(49,298)	(39,754)	(70,202)	(90,007)
Common Stock [Member]
Stockholders' Equity Attributable to Parent	473	424	473	424	483	490	424	423
Additional Paid-in Capital [Member]
Stockholders' Equity Attributable to Parent	$ 2,201,250	$ 1,914,556	$ 2,201,250	$ 1,914,556	$ 2,272,910	$ 2,335,879	$ 1,911,162	$ 1,909,980
Common Class A [Member]
Common Stock, Shares, Outstanding	47,618,626	42,627,286	47,618,626	42,627,286	48,572,237	49,243,813	42,610,271	42,500,611