Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Significant Accounting Policies [Line Items]
Effect of Fourth Quarter Events, Amount	$ 2.2
Estimated useful life of amortizable intangible assets		9 years 4 months	9 years 4 months
Minimum
Significant Accounting Policies [Line Items]
Estimated useful life of amortizable intangible assets		3 years
Maximum
Significant Accounting Policies [Line Items]
Estimated useful life of amortizable intangible assets		15 years