Components of Net Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Components Of Deferred Income Tax Assets And Liabilities [Line Items]
Net operating loss carryforwards	$ 61,248	$ 62,918
Accruals and reserves	16,521	14,951
Software revenue	6,529	7,024
Depreciation	4,882	3,635
Tax credit carryforwards	4,914	3,964
Other	(31)	5
Total deferred tax assets	94,063	92,497
Less valuation allowances	(12,128)	(13,057)
Net deferred tax assets	81,935	79,440
Intangibles	(22,441)	(26,328)
Total deferred tax liabilities	(22,441)	(26,328)
Net deferred income taxes	59,494	53,112
Current deferred tax asset	10,202	9,826
Long-term deferred income tax assets	49,292	43,286
Total deferred income taxes	$ 59,494	$ 53,112