Description of Business and Summary of Significant Accounting Policies Advertising Costs (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Advertising Costs [Abstract]
Advertising Expense	$ 4,700	$ 2,100
Capitalized Direct Response Advertising Costs [Line Items]
Capitalized Direct Response Advertising costs (net of amortization)	$ 151
Document Period End Date	Sep. 30, 2016
Minimum [Member]
Capitalized Direct Response Advertising Costs [Line Items]
Capitalized Direct Response Advertising Costs, Amortization Period	12 months
Maximum [Member]
Capitalized Direct Response Advertising Costs [Line Items]
Capitalized Direct Response Advertising Costs, Amortization Period	24 months