Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets
Stock compensation expense	$ 5,296	$ 5,312
Other	2,839	3,280
Total deferred tax assets	15,470	13,346
Valuation allowance	(727)	(287)
Net deferred tax assets	14,743	13,059
Deferred tax liabilities
Depreciation and amortization	(2,025)	(1,905)
Capitalized software development costs	(2,752)	(1,980)
Intangible assets	(524)	(1,085)
Deferred tax assets, net	9,442	8,089
US Country [Member]
Deferred tax assets
U.S net operating loss carryforwards	7,175	4,589
Foreign Country [Member]
Deferred tax assets
Foreign net operating loss carryforwards	$ 160	$ 165