Fair Value of Financial Instruments Contingent Consideration (Tables) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Site Contingency [Line Items]
Proceeds from (Payments for) Other Financing Activities	$ 100	$ 1,000	$ 100	$ 1,000
Change in fair value of contingent consideration included in net loss	(212)	(657)	(212)	(657)
Fair Value, Inputs, Level 3 [Member]
Site Contingency [Line Items]
Beginning balance	0	325	0	325
Ending balance	$ 0	$ 325	$ 0	$ 325	$ 325	$ 1,982	$ 325	$ 1,982