Total Revenues Gross Profit and Long Lived Assets Excluding Long Term Deferred Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues from External Customers and Long-Lived Assets
Total revenues	$ 137,905	$ 135,324	$ 268,088	$ 273,658
Gross profit	101,459	101,264	195,741	203,868
Long-lived assets	109,678	112,625	109,678	112,625
BI Software and Services | Domestic
Revenues from External Customers and Long-Lived Assets
Total revenues	83,287	81,111	160,595	160,107
Gross profit	61,154	61,052	117,280	118,226
Long-lived assets	95,206	96,979	95,206	96,979
BI Software and Services | EMEA
Revenues from External Customers and Long-Lived Assets
Total revenues	38,608	39,107	76,544	83,896
Gross profit	27,083	28,259	53,012	62,392
Long-lived assets	7,983	9,525	7,983	9,525
BI Software and Services | Other Regions
Revenues from External Customers and Long-Lived Assets
Total revenues	16,010	15,106	30,949	29,655
Gross profit	13,222	11,953	25,449	23,250
Long-lived assets	$ 6,489	$ 6,121	$ 6,489	$ 6,121