Contingent Consideration (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Contingent Consideration [Abstract]
Contingent consideration accrued, current	$ 731		$ 731		$ 2,647
Contingent consideration accrued, noncurrent	1,210		1,210		$ 1,085
Payments on contingent consideration	$ 0	$ 0	$ (1,421)	$ (500)