Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Common Stock, Shares, Outstanding	42,452,457		42,873,187
Stockholders' Equity Attributable to Parent	$ 2,884,208	$ 2,830,909	$ 2,895,251	$ 2,886,701
Held In Rabbi Trust At Cost [Member]
Stockholders' Equity Attributable to Parent	$ (3,403)	$ (3,286)	(3,298)	(3,227)
Retained Earnings
Cash dividends declared per common share (in dollars per share)	$ 0.57	$ 0.55
Stockholders' Equity Attributable to Parent	$ 1,101,061	$ 971,338	1,077,488	934,442
Deferred Compensation, Share-based Payments [Member]
Stockholders' Equity Attributable to Parent	3,403	3,286	3,298	3,227
AOCI Attributable to Parent [Member]
Stockholders' Equity Attributable to Parent	(119,338)	(135,945)	(114,827)	(163,084)
Common Stock [Member]
Stockholders' Equity Attributable to Parent	422	439	427	455
Additional Paid-in Capital [Member]
Stockholders' Equity Attributable to Parent	$ 1,902,063	$ 1,995,077	$ 1,932,163	$ 2,114,888
Common Class A [Member]
Common Stock, Shares, Outstanding	42,452,457	44,114,827	42,873,187	45,641,238