Consolidated Statements of Changes in Shareholders' Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]
Balance at Dec. 31, 2020		$ 3,732	$ 2,288,806	$ 6,475,551	$ (4,164,718)	$ (120,804)
Common stock, shares issued at Dec. 31, 2020		373,225,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options		$ 8	31,471
Exercise of stock options, shares		824,000
Employee share-based compensation expense			47,950
Other Comprehensive Income (Loss)						(4,620)
Treasury stock purchases					(350,000)
Cash dividends declared				(67,191)
Net earnings	$ 172,252			172,252
Balance at Mar. 31, 2021		$ 3,740	2,368,227	6,580,612	(4,514,718)	(125,424)
Common Stock, shares issued at Mar. 31, 2021		374,049,000
Balance at Dec. 31, 2021	$ 3,680,462	$ 3,802	2,717,244	6,751,692	(5,664,718)	(127,558)
Common stock, shares issued at Dec. 31, 2021	380,232,975	380,233,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options		$ 12	61,036
Exercise of stock options, shares		1,125,000
Employee share-based compensation expense			33,332
Other Comprehensive Income (Loss)						8,258
Cash dividends declared				(80,710)
Net earnings	$ 206,129			206,129
Balance at Mar. 31, 2022	$ 3,908,519	$ 3,814	$ 2,811,612	$ 6,877,111	$ (5,664,718)	$ (119,300)
Common Stock, shares issued at Mar. 31, 2022	381,357,862	381,358,000