Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Estimated future employer contributions in next fiscal year	$ 2.0
Defined benefit plan, employer contributions			$ 1.5
Defined contribution plan, compensation expense	$ 0.9	$ 1.3