Other Liabilities (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Other Liabilities [Abstract]
Accrued pension costs	$ 7,067,000		$ 6,976,000
Service costs recognized	0	0
Interest cost	146,000	89,000
Amortized prior service cost	$ 165,000	$ 76,000