Financial Statement Detail (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Recurring revenues
Term license revenues	$ 45,030	$ 39,765	$ 86,282	$ 78,381
Maintenance revenues	16,334	16,649	32,770	33,309
Asset under administration revenues	2,172	1,938	4,905	3,536
Other recurring revenues	24,727	22,590	48,789	44,436
Total recurring revenues	88,263	80,942	172,746	159,662
Non-recurring revenues
Professional services and other revenues	7,341	8,370	14,393	15,347
Perpetual license fees	519	412	1,474	1,619
Total non-recurring revenues	7,860	8,782	15,867	16,966
Summary of prepaid expenses and other assets
Prepaid contract expense	10,037		10,037		9,798
Deferred commissions	6,712		6,712		7,370
Income tax receivable	5,526		5,526
Other receivables	1,342		1,342		451
Debt issuance costs	1,145		1,145
Prepaid royalty	962		962		1,081
Deposits	827		827		1,185
Other	7,601		7,601		5,983
Total prepaid expenses and other	$ 34,152		$ 34,152		$ 25,868