Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Long-term Debt (Details) - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
	Jun. 17, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Long-term Debt [Line Items]
Revolving credit facility and Senior Notes, net		$ 2,214,319	$ 2,732,798
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	5,900
Net gain on extinguishment of debt		$ 280,081	$ 0	$ (26,740)
Senior Secured Notes, Senior Unsecured Notes, and 1.50% Senior Unsecured Convertible Notes Due 2021 [Member]
Long-term Debt [Line Items]
Net gain on extinguishment of debt	$ 227,300