Contingent Consideration (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Contingent Consideration [Abstract]
Contingent consideration accrued, current	$ 1,508		$ 2,105	$ 2,105
Payments on contingent consideration	$ (851)	$ (1,421)