Business Combinations - Pro Forma (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Document Period End Date			Sep. 30, 2012
Business Acquisition, Pro Forma Information
Revenue	$ 53,804,000	$ 42,602,000	$ 145,347,000	$ 124,919,000
Net income	18,072,000	16,536,000	51,824,000	54,048,000
Basic EPS	$ 0.49	$ 0.44	$ 1.41	$ 1.41
Diluted EPS	$ 0.46	$ 0.41	$ 1.32	$ 1.31
Parent, ADAM, Planetsoft, BSI, Taimma, Fintechnix, TriSystems , Combined [Member] [Domain]
Business Acquisition, Pro Forma Information
Revenue, pro forma	54,197,000	52,360,000	158,336,000	156,259,000
Net income, pro forma	18,038,000	16,513,000	51,242,000	54,389,000
Basic EPS, pro forma	$ 0.48	$ 0.44	$ 1.38	$ 1.39
Diluted EPS, pro forma	$ 0.46	$ 0.41	$ 1.30	$ 1.29
Business Acquisition, Pro Forma Revenue, Increase (Decrease)	1,800,000		2,100,000
Business Acquisition, Pro Forma Revenue, Increase (Decrease), Percentage	3.50%		1.30%
Revenue, Net, Increase (Decrease)	$ 11,200,000		$ 20,400,000
Revenue, Net, Increase (Decrease), Percentage	26.30%		16.40%
Secured Syndicated Credit Facility [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Document Period End Date			Sep. 30, 2012