Commitments and Contingencies (Operating Lease Agreements) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense	$ 0.9	$ 0.8
Minimum
Operating Leased Assets [Line Items]
Lessee Leasing Arrangements, Operating Leases, Renewal Term	1 year
Maximum
Operating Leased Assets [Line Items]
Lessee Leasing Arrangements, Operating Leases, Renewal Term	6 years