Acquisitions (Details 10) - Dealix/Autotegrity [Member]	Dec. 31, 2015 USD ($)
Assets Acquired (Liabilities Assumed), Net
Total tangible assets acquired	$ 9,664,000
Total liabilities assumed	2,488,000
Net identifiable assets acquired	7,176,000
Definite-lived intangible assets acquired	7,655,000
Indefinite-lived intangible assets acquired	2,200,000
Goodwill	7,440,000
Net assets acquired	$ 24,471,000