Stock-Based Compensation - Summary of Non-Vested Options for Liability-Classified Stock Options and Stock Appreciation Rights (Detail) - Stock Option and Stock Appreciation Rights [Member]	12 Months Ended
Dec. 31, 2013 USD ($) shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-Vested Shares, beginning balance	2,640
Vested, Shares	(2,640)
Fair Value of Shares Vested \| $	$ 20,038

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration