Plan of Liquidation - Additional Information (Detail)	12 Months Ended
Dec. 31, 2014
Liquidation Basis Of Accounting [Line Items]
Senior notes interest rate	7.75%
Liquidation date on which disposition of assets completes	Dec. 31, 2014
Liquidation Value [Member]
Liquidation Basis Of Accounting [Line Items]
Liquidation date on which disposition of assets completes	Aug. 05, 2016
Liquidation Value [Member] \| Senior Notes [Member]
Liquidation Basis Of Accounting [Line Items]
Senior notes interest rate	7.75%

Reflects the effective interest rate as of the balance sheet date on interest-bearing trade payables.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 25

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=29642582&loc=d3e27881-108397

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 25

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=29642582&loc=d3e27862-108397

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant