Pension Plan (Components Of Net Periodic Benefit Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 1,264	$ 1,342
Interest cost	1,217	1,174
Expected return on plan assets	(2,737)	(2,855)
Amortization of prior service cost	0	4
Recognized net actuarial loss	193	159
Benefit expense	(63)	(176)
Pension plan contributions	$ 0	$ 0