Consolidated Statements Of Changes In Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Non-Controlling Interest [Member]
Balance at Dec. 31, 2020	$ 3,399,972	$ 589,352	$ 2,436,288	$ 73,000	$ (32,970)	$ 331,377	$ 2,925
Net income	133,229			130,972			2,257
Other comprehensive income (loss)	(162,625)					(162,625)
Distributions to non-controlling interest	(387)						(387)
Purchase of treasury stock	(25,923)				(25,923)
Stock Issued During Period RSAs and SARs	15		19,828		(19,813)
Stock-based compensation	3,933		3,933
Cash dividends per share, Common Stock, Cash	(30,799)			(30,799)
Balance at Mar. 31, 2021	3,317,385	589,352	2,420,393	173,173	(39,080)	168,752	4,795
Balance at Dec. 31, 2021	3,448,324	610,804	2,689,894	92,493	(32,973)	77,080	11,026
Net income	120,026			118,154			1,872
Other comprehensive income (loss)	(511,480)					(511,480)
Distributions to non-controlling interest	(136)						(136)
Purchase of treasury stock	(55,855)				(55,855)
Stock Issued During Period RSAs and SARs	(448)		16,087		(16,535)
Stock-based compensation	4,218		4,218
Cash dividends per share, Common Stock, Cash	(32,143)			(32,143)
Balance at Mar. 31, 2022	$ 2,973,402	$ 610,804	$ 2,678,025	$ 178,504	$ (72,293)	$ (434,400)	$ 12,762