Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified		9 Months Ended
Dec. 31, 2013	Sep. 30, 2014 State [Member]	Sep. 30, 2014 Federal [Member]
Operating Loss Carryforwards [Line Items]
Reserved deferred tax amount	$ 72.4
Federal income tax returns subject to examination description		State income tax returns are subject to examination for a period of three to four years after filing.	Federal income tax returns of the Company are subject to IRS examination for the 2012 and 2013 tax years.

A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (d)(2)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration