Defined Benefit Pension Plans (Components of Net Periodic Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Qualified Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 538	$ 730
Interest Cost	723	719
Expected Return on Plan Assets	(1,016)	(925)
Amortization of Prior Service Cost	(6)	(8)
Recognized Net Actuarial Loss	115	414
Net Periodic Benefit Cost	354	930
Non-Qualified Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	12	50
Interest Cost	120	115
Expected Return on Plan Assets	0	0
Amortization of Prior Service Cost	0	0
Recognized Net Actuarial Loss	16	49
Net Periodic Benefit Cost	$ 148	$ 214