Components of Net Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Components Of Deferred Income Tax Assets And Liabilities [Line Items]
Net operating loss carryforwards	$ 65,601	$ 86,770
Accruals and reserves	30,322	24,393
Software revenue	6,608	13,199
Depreciation	5,327	4,655
Tax credit carryforwards	6,686	6,028
Other	58	38
Total deferred tax assets	114,602	135,083
Less valuation allowances	(35,509)	(35,620)
Total net deferred tax assets	79,093	99,463
Intangibles	(13,363)	(17,231)
Total deferred tax liabilities	(13,363)	(17,231)
Total net deferred income taxes	65,730	82,232
Current net deferred tax asset	12,380	12,974
Long-term net deferred income tax assets	53,350	69,258
Total net deferred income taxes	$ 65,730	$ 82,232