Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Compensation and Retirement Disclosure [Abstract]
Defined benefit plan, employer contributions			$ 2.1	$ 1.8
Defined contribution plan, compensation expense	$ 0.8	$ 0.8	$ 1.7	$ 1.8