Pension Plan (Components Of Net Periodic Benefit Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 1,264	$ 1,342	$ 2,528	$ 2,684
Interest cost	1,217	1,174	2,434	2,348
Expected return on plan assets	(2,737)	(2,855)	(5,474)	(5,710)
Amortization of prior service cost	0	4	0	8
Recognized net actuarial loss	193	159	386	318
Benefit expense	$ (63)	$ (176)	(126)	(352)
Pension plan contributions			$ 0	$ 0