Goodwill and Intangible Assets (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill and Intangible Assets (Textual) [Abstract]
Impairment charges of cumulative goodwill	$ 54,600,000
Other net intangibles	1,200,000	2,100,000
Weighted average amortization period of intangible assets	2 years 6 months	3 years	3 years 6 months
Amortization expense of intangible assets	1,100,000	2,000,000	3,100,000
Amortization from capitalized software development costs	$ 156,000	$ 39,000	$ 0