Acquisitions (Details) - USD ($) $ in Thousands	Feb. 27, 2017	Sep. 30, 2017
Business Acquisition [Line Items]
Business acquisitions holdback liability		$ 1,068
Triad Holdings, Inc.
Business Acquisition [Line Items]
Purchase price to acquire common stock	$ 9,200
Cash acquired in acquisition	300
Business acquisitions holdback liability	$ 1,400
Purchase agreement, portion of purchase price held, period from acquisition date (in months)	18 months