Identifiable Intangible Assets, Loyalty Lab (Detail) (Loyalty Lab, USD $) In Thousands, unless otherwise specified	1 Months Ended
	Dec. 07, 2010
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets	$ 6,600
Weighted average amortization period	5 years
Existing Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets	2,000
Weighted average amortization period	5 years
Customer Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets	4,100
Weighted average amortization period	5 years
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets	$ 500
Weighted average amortization period	5 years