Pension (Sensitivity Analysis) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]
Discount rate, estimated effect on annual expense, 2012	$ 4,000
Discount rate, estimated effect on annual expense, 2013	4,100
Long-term rate of return on assets, estimated effect on annual expense, 2012	2,400
Long-term rate of return on assets, estimated effect on annual expense, 2013	$ 3,400