Basis of Presentation (Details 5) (USD $)	3 Months Ended			9 Months Ended		3 Months Ended			6 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Out-of-period adjustments Adjustments related to the Keymark acquisition and capitalization of software development costs	Jun. 30, 2013 Out-of-period adjustments Adjustments related to the Keymark acquisition and capitalization of software development costs	Mar. 31, 2013 Out-of-period adjustments Adjustments related to the Keymark acquisition and capitalization of software development costs	Jun. 30, 2013 Out-of-period adjustments Adjustments related to the Keymark acquisition and capitalization of software development costs
Out-of-period adjustments, net of tax						$ 700,000
Increase in net income	20,006,000	5,882,000	12,976,000	43,303,000	36,036,000	700,000
Understated net income							$ 300,000	$ 400,000	$ 700,000