SEGMENT AND GEOGRAPHIC INFORMATION (Total Revenue by Major Geographic Area) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Segment Reporting Information [Line Items]
Total Revenues	$ 210,084	$ 202,185	$ 616,439	$ 576,555
United States
Segment Reporting Information [Line Items]
Total Revenues	165,930	156,530	478,087	434,324
Europe
Segment Reporting Information [Line Items]
Total Revenues	20,351	21,839	66,903	72,203
Rest of World
Segment Reporting Information [Line Items]
Total Revenues	$ 23,803	$ 23,816	$ 71,449	$ 70,028