Employee Benefit Plans (Components Of The Net Pension Cost) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Employee Benefit Plans [Abstract]
Service cost - benefits earned during the period	$ 406	$ 716	$ 683
Interest cost on projected benefit obligation	5,366	5,505	5,473
Expected return on plan assets	(6,727)	(6,614)	(6,123)
Amortization of unrecognized net loss	1,949	2,208	2,990
Net periodic pension cost	$ 994	$ 1,815	$ 3,023