Business Acquisition (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 01, 2011
Purchase price of Everblue Training Institute		$ 9,900,000
Estimated aggregate earnout payment	15,800,000
Compensation expense related to earnout provision	300,000
Estimated goodwill paid over the fair value of the net assets acquired		8,853,000
Amount of preliminary goodwill deductible for income tax reporting purposes		8,900,000
Everblue [Member]
Number of educational sessions conducted in U.S. cities		70
Number of educational sessions conducted in international locations		7
Estimated goodwill paid over the fair value of the net assets acquired	$ 8,900,000