Employee Benefit Plans (Other Changes In Other Comprehensive Income (Loss) Related To Defined Benefit Pension Plans) (Details) (Defined Benefit Pension Plans [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Other comprehensive income (loss) at December 31, prior year	$ (36,436)	$ (33,974)
Net gain (loss) arising during period	(47,177)	(7,220)
Prior service cost	49	49
Actuarial loss	4,641	4,709
Other comprehensive income (loss) at December 31, current year	$ (78,923)	$ (36,436)