Commitments and Contingencies (Details Textual) $ in Millions		1 Months Ended		3 Months Ended
	Oct. 25, 2016 employee	Apr. 30, 2016 employee	Mar. 31, 2015 case	Dec. 31, 2015 USD ($) case	Dec. 31, 2014 employee	Sep. 30, 2016 USD ($)	Mar. 31, 2014 USD ($)
Ecoserv | Environmental services
Loss Contingencies [Line Items]
Escrow deposit							$ 8.0
Ecoserv | Environmental services | Released 18 months from closing date
Loss Contingencies [Line Items]
Escrow deposit						$ 4.0
Ecoserv | Environmental services | Released 9 months from closing date
Loss Contingencies [Line Items]
Escrow deposit							$ 4.0
Wage and hour litigation
Loss Contingencies [Line Items]
Loss contingency, new claims filed, number | case				2
Threatened litigation | Wage and hour litigation
Loss Contingencies [Line Items]
Loss contingency, number of plaintiffs | employee					5
Loss contingency, new claims filed, number | case			2
Loss contingency, pending claims, number | case			8
Unfavorable regulatory action | Threatened litigation | Wage and hour litigation
Loss Contingencies [Line Items]
Escrow deposit						$ 3.0
Unfavorable regulatory action | Threatened litigation | Subsequent event | Wage and hour litigation
Loss Contingencies [Line Items]
Loss contingency, number of defendants | employee	367
Loss contingency, employees eligible for settlement, opt-outs | employee	0
Loss contingency, percentage of participating employees eligible for settlement	65.00%
Unfavorable regulatory action | Judicial ruling | Wage and hour litigation
Loss Contingencies [Line Items]
Loss contingency, employees eligible for settlement | employee		569
Unfavorable regulatory action | Settled litigation
Loss Contingencies [Line Items]
Litigation settlement, amount				$ 5.0