Liabilities Subject to Compromise (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Debt Instrument [Line Items]
Total liabilities subject to compromise	$ 513,125
5.25% Senior Notes due March 15, 2019 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Total liabilities subject to compromise	500,000
Accrued Interest Payable [Member]
Debt Instrument [Line Items]
Total liabilities subject to compromise	$ 13,125

The amount of debt and related accrued interest included in liabilities subject to compromise.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56145-112766

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6918054&loc=d3e56015-112765

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=114872137&loc=d3e55717-112764

Name:	us-gaap_LiabilitiesSubjectToCompromiseDebtAndAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant