Description of Business and Summary of Significant Accounting Policies Restricted cash (Details) - USD ($) $ in Thousands		12 Months Ended
	Nov. 02, 2016	Dec. 31, 2016	Dec. 31, 2015
Restricted Cash and Cash Equivalents Items [Line Items]
Funds Held for Clients		$ 14,400
Restricted cash		$ 17,217	$ 0
WDEV
Restricted Cash and Cash Equivalents Items [Line Items]
Business Combination, Escrow Holding Period	38 months	38 months
Payments to Acquire Business, Held in Escrow	$ 2,900	$ 2,900