Consolidated Statement of Equity (Statement) - USD ($) $ in Thousands	Total	Parent [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Shares, Issued			(66,148,609)				45,220
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			112,626
Treasury Stock Transactions, Excluding Value of Shares Reissued [Abstract]
Purchase of treasury shares							41,787
Issuance of treasury shares			(64,372)				64,372
Stockholders' Equity Beginning, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2018		$ 2,526,708	$ 661	$ 2,519,423		$ 8,727	$ (2,103)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury shares		(1,460)					(1,460)
Share-based Compensation expense	$ (4,683)	(4,683)	0	(2,136)			(2,547)
Issuance of treasury shares		0	(1)	1			0
Net income (loss)	(120,176)	(120,176)				(120,176)
Stockholders' Equity Ending, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2019		2,409,755	$ 662	2,521,558		(111,449)	$ (1,016)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Shares, Issued			(66,196,863)				(22,635)
Shares, Issued			(61,652,412)				34,922
Treasury Stock Transactions, Excluding Value of Shares Reissued [Abstract]
Purchase of treasury shares					306,185
Issuance of treasury shares			(69,327)		69,327
Stockholders' Equity Beginning, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2019		2,335,507	$ 617	2,384,309		(47,945)	$ (1,474)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury shares		(7,693)			$ (7,693)
Share-based Compensation expense	(5,672)	5,672		3,713			(1,958)
Issuance of treasury shares			(1)	0	0
Net income (loss)	$ (465,015)	(465,015)				(465,015)
Stockholders' Equity Ending, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2020		2,859,964	$ 994	3,372,711		$ (512,960)	$ (781)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Shares, Acquisitions			39,182,045
Stock Issued During Period, Value, Acquisitions		1,015,312	$ (391)	1,014,921
Treasury Stock, Shares, Retired			(251,287)				251,287
Treasury Stock, Retired, Cost Method, Amount			$ (3)	6,425	$ (6,428)
Stock Repurchased During Period, Shares					(1,266,000)
Stock Repurchased and Retired During Period, Shares			(1,266,000)		1,266,000
Stock Repurchased During Period, Value		$ (23,819)			$ (23,819)
Stock Repurchased and Retired During Period, Value			$ (12)	$ (23,807)	$ 23,819
Stock Issued During Period, Shares, Issued for Services			190,279
Shares, Issued			(99,438,122)				(20,493)