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], USD $)	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Stock Option and Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-Vested Shares, beginning balance	2,640	42,160
Vested, Shares	(2,640)	(10,120)
Forfeited/Expired, Shares		(29,400)
Non-Vested Shares, ending balance		2,640
Fair Value of Shares Vested	$ (20,038)	$ (23,962)

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