Costs Associated with Exit or Disposal Activities - Additional Information (Detail) (USD $)	12 Months Ended						12 Months Ended		12 Months Ended			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 ICT Restructuring Plan [Member]	Dec. 31, 2013 Americas [Member] Fourth Quarter 2011 Exit Plan [Member] Seat Employees	Dec. 31, 2011 Americas [Member] Fourth Quarter 2011 Exit Plan [Member]	Dec. 31, 2012 Americas [Member] Fourth Quarter 2011 Exit Plan [Member]	Dec. 31, 2013 Americas [Member] Third Quarter 2010 Exit Plan [Member] Facility	Dec. 31, 2012 Americas [Member] Third Quarter 2010 Exit Plan [Member]	Dec. 31, 2013 EMEA [Member] Fourth Quarter 2011 Exit Plan [Member] Seat Employees	Dec. 31, 2011 EMEA [Member] Fourth Quarter 2011 Exit Plan [Member]	Dec. 31, 2012 EMEA [Member] Fourth Quarter 2011 Exit Plan [Member]	Dec. 31, 2012 EMEA [Member] Fourth Quarter 2011 Exit Plan [Member] Direct Salaries and Related Costs [Member]	Dec. 31, 2011 EMEA [Member] Fourth Quarter 2011 Exit Plan [Member] Direct Salaries and Related Costs [Member]	Dec. 31, 2012 EMEA [Member] Fourth Quarter 2011 Exit Plan [Member] General and Administrative [Member]	Dec. 31, 2011 EMEA [Member] Fourth Quarter 2011 Exit Plan [Member] General and Administrative [Member]	Dec. 31, 2013 EMEA [Member] Fourth Quarter 2010 Exit Plan [Member]	Dec. 31, 2012 EMEA [Member] Fourth Quarter 2010 Exit Plan [Member]
Restructuring Cost and Reserve [Line Items]
Estimated seat rationalization associated with exit or disposal activities				900					900
Estimated employee rationalization associated with exit or disposal activities				300					500
Estimated total costs, some of which may have already been incurred, under the restructuring plan				$ 1,900,000		$ 1,900,000	$ 10,500,000	$ 10,500,000	$ 6,700,000		$ 6,700,000					$ 2,500,000	$ 2,200,000
Impairment of long-lived assets	355,000	1,718,000			500,000		3,800,000			500,000						200,000
Estimated facility-related, program transfer, severance-related and other costs				1,400,000					6,200,000
Cash payment related to restructuring plan			1,900,000	900,000			4,900,000		5,900,000							1,700,000
Lease termination date				Feb. 28, 2017			Feb. 28, 2017		Mar. 31, 2013							Mar. 31, 2014
Estimated revenue migrated associated with exit or disposal activities									3,200,000
Estimated revenue not migrated associated with exit or disposal activities										18,800,000
Cash expenditure for severance related costs												700,000	3,500,000
Lease obligations and facility exit costs, severance and related costs and legal-related costs														(300,000)	2,300,000
Estimated facility-related and program transfer costs							6,700,000									2,100,000
Estimated severance-related costs																$ 200,000
Number of closed customer contact management centers							4