Employee Benefits Plans (Plan Assets At Fair Value) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	$ 60,953		$ 70,189	$ 72,969
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	460
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	59,683
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	810		582
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	401
Cash [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	401
Common/Collective Trusts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	35,805	[1]
Common/Collective Trusts [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	35,805	[1]
Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	23,878	[2]
Mutual Funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	23,878	[2]
Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	59
Money Market Funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	59
Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	810
Other [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Asset of Fair Value	$ 810

[1] Common/collective trusts invest in 67% U.S. short maturity fixed income investments, 25% U. S. Large Cap equities and 8% international equities.

[2] One hundred percent of mutual funds invest in a short term fixed income fund.