Employee Benefits (Accumulated Other Comprehensive Income Recognized in Net Periodic Benefit Cost in Next Fiscal Year) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Retirement Income Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net loss/gain	$ 6,830
Prior service benefit	(3,470)
Other Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net loss/gain	715
Prior service benefit	(40)
Other Postretirement Benefit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net loss/gain	(2,700)
Prior service benefit	$ (3,200)