Pension and Other Postretirement Plans (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2007
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 23,300,000	$ 21,200,000
Amortization of net loss	0
Amortization of prior service cost	103,000
Average rate of return	6.14%
Average rate of return, inception to date	7.28%
Chairman and President Non-Qualified Defined Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	17,700,000	17,600,000
Amortization of net loss	1,487,000
Amortization of prior service cost	59,000
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Vesting percentage in accrued benefits from plan freeze			100.00%
Amortization of net loss	$ (509,300)