Pension Plan Components Of Net Periodic Benefit Costs (Details) (Supplemental Employee Retirement Plans, Defined Benefit [Member], USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Supplemental Employee Retirement Plans, Defined Benefit [Member]
Components of net periodic benefit cost:
Service cost	$ 0	$ 0	$ 0	$ 404,000
Interest cost	526,000	541,000	538,000	591,000
Defined Benefit Plan Amortization	0
Amortization [Abstract]
Prior service cost	0	0	0	230,000
Loss	128,000	0	0	0
Subtotal		541,000	538,000	1,225,000
Curtailment		0	0	1,209,000
Net periodic pension cost	$ 654,000	$ 541,000	$ 538,000	$ 2,434,000
Discount rate		4.50%	5.50%	6.00%