Other Liabilities (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Other Liabilities [Abstract]
Accrued pension costs	$ 4,466		$ 4,466		$ 4,289
Interest cost	87,000	100,000	177,000	190,000
Amortized prior service cost	$ 76,000	$ 82,000	$ 152,000	$ 164,000