Organization - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
Dec. 31, 2013	Mar. 31, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]
PCI recorded deferred tax asset in prior years		$ 101
Establishment of valuation allowance on deferred tax assets		101
Deferred tax assets valuation allowance charged off	$ 101

Amount of deferred tax asset, before valuation allowance, attributable to deductible other tax carryforwards.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 30

-Paragraph 5

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6907311&loc=d3e30536-109315

Name:	us-gaap_TaxCreditCarryforwardDeferredTaxAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant