Acquisitions (Details) - USD ($) $ in Thousands			9 Months Ended
	Jul. 27, 2016	Jan. 27, 2015	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition [Line Items]
Consideration transferred, cash payments, net of cash acquired			$ 7,863	$ 1,250
IPI
Business Acquisition [Line Items]
Membership interest acquired	100.00%
Consideration transferred, cash payments, net of cash acquired	$ 7,900
Consideration transferred, common stock issued (in shares)	247,764
IAL
Business Acquisition [Line Items]
Consideration transferred, cash payments		$ 1,300
Consideration transferred, common stock issued (in shares)		60,024
Percent of assets acquired		100.00%