Restructuring Expenses Restructuring (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016 USD ($) Employee	Sep. 30, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | Employee	36
Payments for restructuring		$ 0.5
Restructuring costs expected to be paid	$ 1.7	$ 1.7
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 1.7