CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS EQUITY Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares outstanding (shares)		123.194
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	$ 3,751,000	$ 1,000	$ 232,000	$ (568,000)	$ (448,000)	$ 4,534,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	4,000					4,000
Other Comprehensive Income (Loss), Net of Tax	15,000				15,000
Stock repurchased during period (shares)		(0.215)
Stock Repurchased During Period, Value	(13,000)		0	(13,000)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	12,000		12,000
Dividends, Cash	(43,000)					(43,000)
Stock Issued During Period, Shares, Employee Stock Purchase Plans		0.391
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		0.134
Stock Issued During Period, Value, Employee Stock Purchase Plan	20,000		20,000
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	3,000		3,000
Stockholders' Equity Attributable to Parent at Mar. 31, 2019	3,746,000	$ 1,000	261,000	(581,000)	(433,000)	4,498,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2018	3,751,000	1,000	232,000	(568,000)	(448,000)	4,534,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	266,000
Other Comprehensive Income (Loss), Net of Tax	26,000
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	3,973,000	$ 1,000	270,000	(593,000)	(422,000)	4,717,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares outstanding (shares)		123.504
Stockholders' Equity Attributable to Parent at Mar. 31, 2019	3,746,000	$ 1,000	261,000	(581,000)	(433,000)	4,498,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	262,000					262,000
Other Comprehensive Income (Loss), Net of Tax	11,000				11,000
Stock repurchased during period (shares)		(0.194)
Stock Repurchased During Period, Value	(12,000)			(12,000)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	9,000		9,000
Dividends, Cash	$ (43,000)					(43,000)
Cash dividend declared per share (usd per share)	$ 0.35
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		0.028
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	$ 0		0
Stockholders' Equity Attributable to Parent at Jun. 30, 2019	$ 3,973,000	$ 1,000	270,000	(593,000)	(422,000)	4,717,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares outstanding (shares)		123.338
Common stock, shares outstanding (shares)	123,000,307	123.000
Stockholders' Equity Attributable to Parent at Dec. 31, 2019	$ 4,331,000	$ 1,000	305,000	(643,000)	(465,000)	5,133,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	(232,000)					(232,000)
Other Comprehensive Income (Loss), Net of Tax	(17,000)				(17,000)
Stock repurchased during period (shares)		(0.538)
Stock Repurchased During Period, Value	(31,000)		0	(31,000)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	9,000		9,000
Dividends, Cash	(45,000)					(45,000)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		0.123
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	0		0
Stockholders' Equity Attributable to Parent at Mar. 31, 2020	4,015,000	$ 1,000	314,000	(674,000)	(482,000)	4,856,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2019	4,331,000	1,000	305,000	(643,000)	(465,000)	5,133,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	(446,000)
Other Comprehensive Income (Loss), Net of Tax	7,000
Stockholders' Equity Attributable to Parent at Jun. 30, 2020	3,861,000	$ 1,000	350,000	(674,000)	(458,000)	4,642,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares outstanding (shares)		122.585
Stockholders' Equity Attributable to Parent at Mar. 31, 2020	4,015,000	$ 1,000	314,000	(674,000)	(482,000)	4,856,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	(214,000)					(214,000)
Other Comprehensive Income (Loss), Net of Tax	24,000				24,000
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	$ 2,000		2,000
Cash dividend declared per share (usd per share)	$ 0.375
Stock Issued During Period, Shares, Employee Stock Purchase Plans		1.000
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures		0.054
Stock Issued During Period, Value, Employee Stock Purchase Plan			27,000
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	$ 0
Stockholders' Equity Attributable to Parent at Jun. 30, 2020	3,861,000	$ 1,000	350,000	$ (674,000)	$ (458,000)	$ 4,642,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustments to Additional Paid in Capital, Warrant Issued	$ 7,000		$ 7,000
Common stock, shares outstanding (shares)	123,639,314	123.639