Fresh Start Accounting - Reconciliation of Reorganization Value (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Feb. 11, 2016
Reorganizations [Abstract]
Enterprise value	$ 954,242	$ 954,242
Plus: Cash, cash equivalents and restricted cash		250,046
Plus: Working capital surplus		712
Plus: Current liabilities	$ 51,688	80,284
Reorganization value of Successor assets		$ 1,285,284

Amount attributed to the reconstituted entity, as well as the expected net realizable value of those assets that will be disposed before reconstitution occurs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Reorganization Value
-URI http://asc.fasb.org/extlink&oid=29635974

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=34712771&loc=d3e56239-112766

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 05
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=49179835&loc=d3e54813-112758

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=34712771&loc=d3e56426-112766

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