Deferred Tax Assets (Details Textual) (USD $)	3 Months Ended						9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ 0	$ 8,371,000	$ 1,668,000	$ (11,000,000)	$ 0	$ 0	$ 10,039,000	$ (11,000,000)
Deferred Tax Assets, Valuation Allowance	1,027,000			11,000,000			1,027,000	11,000,000	11,067,000
Effective Income Tax Rate Corporate Tax Percentage	6.90%
North Carolina corporate income tax rate reduction adjustment	740,000	0	0				740,000
Other Comprehensive Income Loss Tax Adjustment For Pension And Other Post Retirement Benefit Plans	135,000			0			135,000	0
Dollar Effect of Future Contingent Rate Reductions	less than $300,000 each
Change In Value Of Deferred Tax Assets For Tax Rate Changes							$ 875,000
Effective January 1, 2014 [Member]
Effective Income Tax Rate Corporate Tax Percentage	6.00%
Effective January 1, 2015 [Member]
Effective Income Tax Rate Corporate Tax Percentage	5.00%
Effective January 1, 2016 [Member]
Effective Income Tax Rate Corporate Tax Percentage	4.00%
Effective January 1, 2017 [Member]
Effective Income Tax Rate Corporate Tax Percentage	3.00%