Organization - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended		12 Months Ended			12 Months Ended								1 Months Ended
	Aug. 30, 2012	Aug. 01, 2012	Dec. 31, 2013 Country Employee	Dec. 31, 2012	May 31, 2011	Dec. 31, 2012 Selling, General and Administrative Expenses	Dec. 31, 2012 Other income (expense)	Dec. 31, 2013 Fortune Global 500 Minimum Customer	Dec. 14, 2012 General Atlantic	Dec. 14, 2012 Oak Hill Capital Partners	Oct. 25, 2012 Bain Purchaser	Oct. 25, 2012 Bain Co-Investor	Oct. 25, 2012 GIC Purchaser	Aug. 31, 2007 Existing Shareholders	Mar. 24, 2010 General Electric Company	Dec. 31, 2012 General Electric Company Maximum
Organization [Line Items]
Number of years of service			15 years
Number of professionals around the globe, minimum			63,600
Number of countries in which entity operates			24
Number of clients								100
Number of shares sold														17,647,059
Percent of ownership held									2.40%	2.40%					9.10%	5.00%
Common stock shares to be purchased by affiliates of Bain Capital Partners		67,750,678
Sale of common shares, per share amount		$ 14.76
Sale Value of common stock shares to be purchased by affiliates of Bain Capital Partners		$ 1,000,000
Declaration of special cash dividend, declared date		Aug. 30, 2012
Declaration of special cash dividend, payment date		Sep. 24, 2012
Declaration of special cash dividend, record date		Sep. 10, 2012
Number of common shares sold by selling shareholder											57,537,264	50,812	10,162,602
Termination of credit facility	380,000
New credit facility agreement	925,000				380,000
Dividend per share	$ 2.24
Dividend paid	501,620			501,620
Total expenses incurred for 2012 recapitalization				23,464		6,237	17,227
Reimbursement of expenses relating to 2012 recapitalization				$ 17,000			$ 17,000