Stock Based Compensation - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012 Software Operations [Member] 2011 Long Term Incentive Plan [Member]	Dec. 31, 2010 Wireless Operations [Member] 2011 Long Term Incentive Plan [Member]	Dec. 31, 2013 Executive [Member] Software Operations [Member] Employees
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Forfeitures benefits		$ 0.4	$ 4.7
Number of departed employees				2
Long Term Incentive Plan modification expense		0.2
Increase in share-based compensation expense	$ 1.8