Segment Information (Revenue by Geographic Region) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Geographic Reporting Disclosure [Line Items]
Revenue	$ 45,724	[1]	$ 56,793	[1]
United States
Geographic Reporting Disclosure [Line Items]
Revenue	20,428		28,024
Europe
Geographic Reporting Disclosure [Line Items]
Revenue	8,412		11,255
KOREA, REPUBLIC OF
Geographic Reporting Disclosure [Line Items]
Revenue	10,294		8,964
Rest of World
Geographic Reporting Disclosure [Line Items]
Revenue	$ 6,590		$ 8,550

[1] quarters March 31, 2014 March 31, 2013Components of Revenue License Fees8,579 12,829Service Revenue37,145 43,964Net Revenue45,724 56,793