Acquisition (Details Textual) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Dec. 31, 2011	Jan. 31, 2012
Acquisition (Textual) [Abstract]
Fair value of deferred revenue acquired	$ 304,000	$ 304,000
Fair Value of Deferred Revenue Prior to Acquisition	5,100,000	5,100,000
Acquisition (Additional Textual) [Abstract]
Date of acquisition		Jan. 31, 2012
Cash paid for acquisition	287,500,000	287,500,000		287,500,000
Net proceeds from credit facility used for acquisition	105,000,000	105,000,000
Credit facility drawn	100,000,000	100,000,000
Acquisition cost	18,000	1,100,000	305,000
Debt origination costs related to credit facility		2,300,000
Gross contractual amount of trade accounts receivable acquired	9,400,000	9,400,000
TaxACT [Member]
Acquisition (Textual) [Abstract]
Revenue from acquiree business sales		60,900,000
Acquiree business contributed to net income		$ 32,500,000
Stock Options [Member]
Acquisition (Textual) [Abstract]
Options		380,000
Restricted Stock Units (RSUs) [Member]
Acquisition (Textual) [Abstract]
Options		167,000
Customer relationships [Member]
Acquisition (Textual) [Abstract]
Estimates lives of acquired intangible assets		8 years
Proprietary technology [Member]
Acquisition (Textual) [Abstract]
Estimates lives of acquired intangible assets		4 years
Personal property assets [Member]
Acquisition (Textual) [Abstract]
Estimates lives of acquired intangible assets		3 years