Treasury Stock (Details) $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($) shares
Treasury Stock [Abstract]
Treasury Stock Purchase Plan	$ 40.0
Stock Repurchased During Period, Shares | shares	174,885
Payments for Repurchase of Equity including commissions	$ 15.4
Treasury Stock Purchase Plan Remaining Available	$ 7.2
Shares Paid for Tax Withholding for Share Based Compensation | shares	17,661
Payments Related to Tax Withholding for Share-based Compensation	$ 1.6