Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified		6 Months Ended
Dec. 31, 2013	Jun. 30, 2014 Federal [Member]	Jun. 30, 2014 State [Member]
Operating Loss Carryforwards [Line Items]
Reserved deferred tax amount	$ 72.4
Federal income tax returns subject to examination description		Federal income tax returns of the Company are subject to IRS examination for the 2012 tax year.	State income tax returns are subject to examination for a period of three to four years after filing.

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

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