Employee Benefit Plans (Components Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 178	$ 171
Interest cost	395	359
Expected return on plan assets	(583)	(638)
Amortization of prior service cost	(1)	(1)
Amortization of net loss	141	111
Net periodic benefit cost	130	2
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	(13)	8
Interest cost	109	118
Amortization of prior service cost	28	26
Amortization of net loss		37
Net periodic benefit cost	$ 124	$ 189