Other Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended				3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Metastorm [Member]	Jun. 30, 2011 Metastorm [Member]	Jun. 30, 2011 Click Equations [Member]	Jun. 14, 2011 Click Equations [Member]	Jun. 30, 2011 Click Equations [Member]
Schedule of Equity Method Investments [Line Items]
Gain or Loss on sale					$ 208	$ 24,853	$ (803)	$ 800	$ (803)
Other Income (Loss)
Realized gains on sales of marketable securities (Note 5)	1,446		1,446
Dilution gain on equity method companies (Note 5)		473		473
Gains on sales/distributions of ownership interests	12	531	12	531
Gain on other distributions		1,424		1,424
Other	12	(24)	(39)	(13)
Total other income (loss) for parent company	1,470	1,601	1,627	26,465
Total other income (loss) for consolidated core companies	(416)	11	(176)	93
Other income (loss), net	$ 1,054	$ 1,612	$ 1,451	$ 26,558