Employee Benefit Plans (Components Of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 171	$ 155	$ 513	$ 464
Interest cost	359	381	1,077	1,143
Expected return on plan assets	(638)	(571)	(1,914)	(1,797)
Amortization of prior service cost	(1)	(1)	(3)	(2)
Amortization of net loss	111	32	333	96
Net periodic benefit cost (benefit)	2	(4)	6	(96)
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	8	4	24	11
Interest cost	118	144	354	433
Amortization of prior service cost	26	25	78	75
Amortization of net loss	37	44	111	131
Net periodic benefit cost (benefit)	$ 189	$ 217	$ 567	$ 650