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]	Restricted stock	Equity Option [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			48,254
Treasury Stock Transactions, Excluding Value of Shares Reissued [Abstract]
Purchase of treasury shares							41,787
Issuance of treasury shares			0				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)	(1)	(4,682)			0
Issuance of treasury shares		0	0	2,547			(2,547)
Net income (loss)		(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)
Weighted Average Number of Shares Outstanding, Basic	65,998,000
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]
Share-based Compensation expense	$ (12,258)
Net income (loss)	$ (51,628)
Stockholders' Equity Ending, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2019		2,378,406	$ 635	2,433,974		(42,901)	$ (13,302)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements								0	0
Pro Forma Weighted Average Shares Outstanding, Diluted	65,998,000
Shares, Issued			(66,196,863)				(22,635)
Weighted Average Number of Shares Outstanding, Basic	65,815,000
Purchase of treasury shares					54,784
Issuance of treasury shares							24,604
Stockholders' Equity Beginning, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2019		2,409,755	$ 662	2,521,558		(111,449)	$ (1,016)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury shares		(2,257)			$ (2,257)
Issuance of treasury shares			(1)	995			(995)
Net income (loss)	$ 68,548	68,548				68,548
Stockholders' Equity Ending, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2019		2,378,406	$ 635	2,433,974		(42,901)	$ (13,302)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury Stock, Shares, Retired			(2,182)				2,182
Treasury Stock, Retired, Cost Method, Amount				78	$ (78)
Stock Repurchased During Period, Shares					(3,136,406)
Stock Repurchased and Retired During Period, Shares			(2,822,259)		2,822,259
Stock Repurchased During Period, Value		(105,215)			$ (105,215)
Stock Repurchased and Retired During Period, Value			$ (28)	(94,085)	$ 94,113
Stock Issued During Period, Shares, Issued for Services			148,040
Stock Issued During Period, Value, Issued for Services				7,574
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements								85,000	26,000
Pro Forma Weighted Average Shares Outstanding, Diluted	65,926,000
Shares, Issued			(63,520,462)				(364,780)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value		7,575
Shares, Issued			(61,652,412)				34,922
Purchase of treasury shares					306,185
Issuance of treasury shares			0		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		3,713			(1,958)
Issuance of treasury shares			(1)	0	0
Net income (loss)		(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			120,952
Weighted Average Number of Shares Outstanding, Basic	96,821,000
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]
Share-based Compensation expense	$ (12,036)
Net income (loss)	$ (686,847)
Stockholders' Equity Ending, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2020		2,644,009	$ 996	3,378,553		(734,792)	$ (748)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements								0	0
Pro Forma Weighted Average Shares Outstanding, Diluted	96,821,000
Shares, Issued			(99,438,122)				(20,493)
Weighted Average Number of Shares Outstanding, Basic	99,566,000
Purchase of treasury shares					64,219
Issuance of treasury shares			0				12,200
Stockholders' Equity Beginning, 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]
Purchase of treasury shares		(487)			$ (487)
Share-based Compensation expense							(198)
Issuance of treasury shares		0	(2)	0			0
Net income (loss)	$ (221,832)	(221,832)				(221,832)
Stockholders' Equity Ending, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2020		2,644,009	$ 996	3,378,553		$ (734,792)	$ (748)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury Stock, Shares, Retired			(39,374)				39,374
Treasury Stock, Retired, Cost Method, Amount				322	$ (322)
Stock Repurchased During Period, Shares					(1,300,000)
Stock Issued During Period, Shares, Issued for Services			212,809
Stock Issued During Period, Value, Issued for Services				$ 6,164
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements								0	0
Pro Forma Weighted Average Shares Outstanding, Diluted	99,566,000
Shares, Issued			(99,611,557)				33,138
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value		$ 6,364