Financial Statement Detail (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Recurring revenues
Term license revenues	$ 49,265	$ 45,030	$ 96,304	$ 86,282
Perpetual maintenance revenues	16,571	16,334	32,712	32,770
Asset under administration revenues	2,387	2,172	3,996	4,905
Other recurring revenues	24,311	24,727	48,652	48,789
Total recurring revenues	92,534	88,263	181,664	172,746
Non-recurring revenues
Professional services and other revenues	7,293	7,341	14,536	14,393
Perpetual license fees	543	519	974	1,474
Total non-recurring revenues	$ 7,836	$ 7,860	$ 15,510	$ 15,867