Purchase Price Allocation (Parenthetical) (Detail)	1 Months Ended
	Nov. 04, 2011 Copal Partners Trade names	Nov. 04, 2011 Copal Partners Client relationships	Nov. 04, 2011 Copal Partners Other intangibles	Nov. 04, 2011 Copal Partners Total Intangible Assets	Dec. 16, 2011 Barrie & Hibbert Limited Trade names	Dec. 16, 2011 Barrie & Hibbert Limited Client relationships	Dec. 16, 2011 Barrie & Hibbert Limited Software	Dec. 16, 2011 Barrie & Hibbert Limited Other intangibles	Dec. 16, 2011 Barrie & Hibbert Limited Total Intangible Assets	Nov. 18, 2010 CSI Global Education, Inc. Trade names	Nov. 18, 2010 CSI Global Education, Inc. Client relationships	Nov. 18, 2010 CSI Global Education, Inc. Trade secrets	Nov. 18, 2010 CSI Global Education, Inc. Total Intangible Assets
Business Acquisition [Line Items]
Weighted average life of intangible assets acquired (in years)	15 years	16 years	2 years	15 years	5 years	18 years	7 years	2 years	12 years	30 years	21 years	13 years	21 years