Revenue Recognition and Contractual Adjustments - Additional Information (Detail) (USD $)	3 Months Ended
Mar. 31, 2014
Revenue Recognition [Abstract]
Percentage of growth revenue	16.00%
Reduction in revenue	$ 700,000

Percentage of assumed long-term growth in revenues, used as an input to measure fair value.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

Name:	us-gaap_FairValueInputsLongTermRevenueGrowthRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration