Basis of Presentation, Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Detail)

v2.4.0.8

Basis of Presentation, Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Reduction of Net cash provided by operating and investing activity	$ 2.4