Assets and Liabilities of Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011		Sep. 30, 2011
Current assets:
Receivables, net	$ 251,113	$ 229,702
Prepaid expenses	12,842	11,540
Total current assets	460,591	482,074
Deferred charges and other assets	43,595	30,162
Total assets	904,615	769,130		780,892
Current liabilities:
Accounts payable	23,982	23,109
Accrued employee compensation and benefits	76,910	62,452
Deferred revenue	37,213	34,319
Other accrued expenses and current liabilities	26,484	21,191
Total current liabilities	166,426	149,285
Spain [Member] | Held for Sale [Member]
Current assets:
Receivables, net		8,970
Prepaid expenses		23
Total current assets		8,993
Deferred charges and other assets		597
Total assets		9,590	[1]
Current liabilities:
Accounts payable		1,191
Accrued employee compensation and benefits		4,592
Deferred revenue		335
Other accrued expenses and current liabilities		1,010
Total current liabilities		7,128	[2]
Total net assets		$ 2,462

[1] Classified as current and included in "Assets held for sale, discontinued operations" in the accompanying Condensed Consolidated Balance Sheet as of December 31, 2011.

[2] Classified as current and included in "Liabilities held for sale, discontinued operations" in the accompanying Condensed Consolidated Balance Sheet as of December 31, 2011.