Share-Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Employee Service Share Based Compensation, Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense, net of tax	$ 1,215		$ 891	$ 3,821	$ 4,192
Number of shares
Unrecognized compensation cost related to stock options and restricted stock	7,878			7,878
Maximum payroll deductions to purchase common stock (in hundredths)				10.00%
Discount offered to employees (in hundredths)				5.00%
Approved increase in number of shares available for purchase (in shares)		500,000
Stock Options [Member]
Number of Options [Abstract]
Options outstanding (in shares)				8,918,290
Options granted (in shares)				465,000
Options exercised (in shares)				(1,170,000)
Options forfeited and expired (in shares)				(2,149,115)
Options outstanding (in shares)	6,064,175			6,064,175
Options exercisable (in shares)	4,046,050			4,046,050
Restricted Stock [Member]
Number of shares
Restricted stock outstanding (in shares)				2,100,000
Restricted stock granted (in shares)				652,195
Restricted stock vested (in shares)				(108,222)
Restricted stock forfeited (in shares)				0
Restricted stock outstanding (in shares)	2,643,973			2,643,973
Software and Other Cost of Sales [Member]
Employee Service Share Based Compensation, Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense, net of tax	13		4	39	4
Professional Services Cost of Sales [Member]
Employee Service Share Based Compensation, Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense, net of tax	25		17	83	65
Maintenance and EDI Cost of Sales [Member]
Employee Service Share Based Compensation, Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense, net of tax	25		7	69	24
Sales and Marketing [Member]
Employee Service Share Based Compensation, Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense, net of tax	292		313	1,154	1,211
Product Research and Development [Member]
Employee Service Share Based Compensation, Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense, net of tax	178		103	563	351
General and Administrative [Member]
Employee Service Share Based Compensation, Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense, net of tax	682		253	1,913	2,343
Restructuring and Other Expenses [Member]
Employee Service Share Based Compensation, Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense, net of tax	$ 0		$ 194	$ 0	$ 194