Long-Lived Assets (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Client contracts
Finite Lived Intangible Assets [Line Items]
Estimated useful life	50 months
Estimated total amortization expense 2016	$ 13.3
Estimated total amortization expense 2017	9.7
Estimated total amortization expense 2018	7.9
Estimated total amortization expense 2019	5.6
Estimated total amortization expense 2020	$ 2.7
Software
Finite Lived Intangible Assets [Line Items]
Estimated useful life	70 months
Estimated total amortization expense 2016	$ 8.6
Estimated total amortization expense 2017	7.0
Estimated total amortization expense 2018	5.5
Estimated total amortization expense 2019	4.0
Estimated total amortization expense 2020	$ 2.9