Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 4,651,000		$ 4,651,000		$ 4,872,000	$ 3,051,000	$ 3,187,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	(6,000)	(5,000)	(16,000)	(31,000)
Amounts reclassified from accumulated other comprehensive income, before tax	(320,000)	(190,000)
Other Comprehensive Income (Loss), Tax	99,000	54,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	(2,000)	(2,000)	(6,000)	(11,000)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	35,000	22,000	105,000	65,000
Derivative [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(20,000)		(20,000)		(30,000)	(34,000)	(54,000)
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion		31,000
Other Comprehensive Income (Loss), Tax		(11,000)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	4,671,000		4,671,000		4,902,000	3,085,000	3,241,000
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	(336,000)	(221,000)
Other Comprehensive Income (Loss), Tax		$ 65,000