Note 8. Business Combinations (Detail) (USD $)	1 Months Ended
	Jun. 29, 2012	Nov. 30, 2012
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period (in Dollars)	$ 11,400,000
Entity Number of Employees	49	6,020
Finite-lived Intangible Assets Acquired (in Dollars)	6,400,000
Business Acquisition, Purchase Price Allocation, Goodwill Amount (in Dollars)	$ 22,000,000
Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life	7 years
Software Technology [Member]
Finite-Lived Intangible Asset, Useful Life	5 years
Data Content [Member]
Finite-Lived Intangible Asset, Useful Life	3 years
Noncompete Agreements [Member]
Finite-Lived Intangible Asset, Useful Life	4 years
Trade Names [Member]
Finite-Lived Intangible Asset, Useful Life	2 years