Total Revenues Gross Profit and Long Lived Assets Excluding Long Term Deferred Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues from External Customers and Long-Lived Assets
Total revenues	$ 130,183	$ 138,334
Gross profit	94,282	102,604
Core Business Intelligence Software And Services | Domestic
Revenues from External Customers and Long-Lived Assets
Total revenues	77,308	78,996
Gross profit	56,126	57,174
Long-lived assets	95,489	92,380
Core Business Intelligence Software And Services | EMEA
Revenues from External Customers and Long-Lived Assets
Total revenues	37,936	44,789
Gross profit	25,929	34,133
Long-lived assets	8,620	9,627
Core Business Intelligence Software And Services | Other Regions
Revenues from External Customers and Long-Lived Assets
Total revenues	14,939	14,549
Gross profit	12,227	11,297
Long-lived assets	6,537	5,993
Consolidated Entities
Revenues from External Customers and Long-Lived Assets
Total revenues	130,183	138,334
Gross profit	94,282	102,604
Long-lived assets	$ 110,646	$ 108,000