Employee Benefit Plans (Other Changes In Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Other comprehensive income (loss) at December 31, prior year	$ (102,692)	$ (53,387)
Net gain (loss) arising during period	(259)	(58,647)
Prior service cost	21	49
Actuarial loss (gain)	11,011	9,294
Other comprehensive income (loss) at December 31, current year	(91,920)	(102,692)
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Other comprehensive income (loss) at December 31, prior year	(12,670)	(6,452)
Net gain (loss) arising during period	7,231	(6,475)
Actuarial loss (gain)	300	257
Other comprehensive income (loss) at December 31, current year	$ (5,139)	$ (12,670)