Pension Liabilities (Narrative) (Details) (USD $)	12 Months Ended			1 Months Ended	12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Mar. 31, 2007 Supplemental Executive Retirement Plans [Member]	Dec. 31, 2012 Supplemental Executive Retirement Plans [Member]	Dec. 31, 2011 Supplemental Executive Retirement Plans [Member]	Dec. 31, 2012 Other Pension Plans [Member]	Dec. 31, 2011 Other Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of monthly salary paid as retirement benefit					40.00%
Measurement period for monthly salary based payment					36 months
Monthly payment amount after retirement					$ 25,000
Period of guaranteed monthly payments					180 months
Initial pension benefit obligation				2,700,000
Discount rate	3.40%	4.25%		5.75%	3.40%	4.25%
Rate of compensation increase	3.50%	3.50%		3.50%	3.50%	3.50%
Prior service costs	931,000	1,234,000		2,700,000
Unrecognized prior service cost	931,000	1,234,000		2,700,000
Unrecognized prior service cost amortization period				10 years
Interest cost	149,000	195,000	200,000
Amortization of prior service costs	304,000	304,000	304,000
Amortization of net gain	0	24,000
Balance of liability	5,900,000	3,500,000					1,000,000	778,000
Accumulated unrecognized prior service cost	3,200,000	1,220,000
Estimated amortization of net loss next fiscal year	356,000
Estimated amortization of prior service cost next fiscal year	304,000
Pension expenses	$ 304,000	$ 832,000	$ 112,000				$ 204,000	$ 101,000