Pension Plan (Components Of Net Periodic Benefit Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 1,342	$ 1,083	$ 4,026	$ 3,249
Interest cost	1,174	1,144	3,522	3,432
Expected return on plan assets	(2,855)	(2,717)	(8,565)	(8,151)
Amortization of prior service cost	4	5	12	15
Recognized net actuarial loss	159	0	477	0
Benefit expense	$ (176)	$ (485)	(528)	(1,455)
Pension plan contributions			$ 0	$ 0