Business Acquisitions (Intangible Assets Acquired) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 BSI, TAIMMA, FINTECHNIX, PLANETSOFT, TRISYSTEMS [Member]	Dec. 31, 2012 BSI, TAIMMA, FINTECHNIX, PLANETSOFT, TRISYSTEMS [Member] Customer Relationships [Member]	Dec. 31, 2012 BSI, TAIMMA, FINTECHNIX, PLANETSOFT, TRISYSTEMS [Member] Developed Technology [Member]	Dec. 31, 2012 BSI, TAIMMA, FINTECHNIX, PLANETSOFT, TRISYSTEMS [Member] Noncompete Agreements [Member]	Dec. 31, 2012 BSI, TAIMMA, FINTECHNIX, PLANETSOFT, TRISYSTEMS [Member] Trademarks [Member]	Dec. 31, 2011 ADAM AND HCS [Member]	Dec. 31, 2011 ADAM AND HCS [Member] Customer Relationships [Member]	Dec. 31, 2011 ADAM AND HCS [Member] Developed Technology [Member]	Dec. 31, 2011 ADAM AND HCS [Member] Noncompete Agreements [Member]	Dec. 31, 2011 ADAM AND HCS [Member] Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, Fair Value	$ 20,246	$ 17,365	$ 2,327	$ 118	$ 436	$ 20,970	$ 16,594	$ 2,406	$ 0	$ 1,970
Acquired intangible assets, Weighted Average Useful Life (in years)	10 years 1 month	10 years 11 months	4 years 6 months	5 years	10 years	11 years 2 months 13 days	11 years 8 months 15 days	5 years 3 months 19 days	0 years	13 years 4 months 26 days