Employee Benefit Plans (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]
Defined benefit plan, employer contributions			$ 2,000,000	$ 1,500,000
Estimated additional contributions in current fiscal year			0
Defined contribution plan, compensation expense	$ 900,000	$ 800,000	$ 1,800,000	$ 2,100,000