Pension and Other Postretirement Plans (Narrative) (Details) (USD $)	12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Chairman and President Non-Qualified Defined Benefit Plans [Member]	Dec. 31, 2011 Chairman and President Non-Qualified Defined Benefit Plans [Member]	Dec. 31, 2012 Defined Benefit Pension Plans [Member]	Dec. 31, 2007 Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Average Rate of Return	5.52%
Vesting percentage in accrued benefits from plan freeze						100.00%
Accumulated benefit obligation	$ 23,500,000	$ 21,900,000	$ 19,500,000	$ 19,800,000
Amortization of net loss	66,000		(1,097,000)		777,000
Amortization of prior service cost	$ (103,000)		$ 59,000
Average rate of return, inception to date	6.70%