Restructuring Expenses Restructuring (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2016 USD ($) Employee	Jun. 30, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | Employee	36
Payments for restructuring		$ 1.2
Restructuring costs expected to be paid	$ 0.5	$ 0.5
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 1.7