Condensed Consolidated Statements of Stockholders Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]
Stockholders' Equity Attributable to Parent	$ 9,569,535	$ 791	$ 1,870,906	$ 6,736,265	$ (1,102,058)	$ 2,063,631
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | Accounting Standards Update 2018 02 [Member]	(2,020)			(2,020)
Net Income (Loss) Attributable to Parent	100,230
Other Comprehensive Income (Loss), Net of Tax	(635,235)					(635,235)
Dividends, Common Stock, Cash	(32,241)			(32,241)
Treasury Stock, Value, Acquired, Cost Method	(2,616)				2,616
Stock Issued During Period, Value, Treasury Stock Reissued	(10,608)		(9,446)	(4,689)	(5,851)
Stockholders' Equity Attributable to Parent	9,008,261	791	1,880,352	6,797,545	(1,098,823)	1,428,396
Stockholders' Equity Attributable to Parent	8,450,553	791	1,898,652	7,284,949	(1,370,602)	636,763
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | Accounting Standards Update 2018 02 [Member]	(87)			(87)
Net Income (Loss) Attributable to Parent	169,507
Other Comprehensive Income (Loss), Net of Tax	1,129,202					1,129,202
Dividends, Common Stock, Cash	(37,707)			(37,707)
Treasury Stock, Value, Acquired, Cost Method	(49,052)				49,052
Stock Issued During Period, Value, Treasury Stock Reissued	(7,692)		(7,639)	(4,581)	(4,634)
Stockholders' Equity Attributable to Parent	$ 9,670,108	$ 791	$ 1,906,291	$ 7,412,081	$ (1,415,020)	$ 1,765,965