Pension (Net Pension Cost) (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
Pension [Abstract]
Service cost - benefits earned during the period	$ 104	$ 88	$ 207	$ 176
Interest cost on projected benefit obligation	1,286	1,362	2,573	2,724
Expected return on plan assets	(1,645)	(1,675)	(3,290)	(3,350)
Amortization of unrecognized net loss	730	540	1,460	1,080
Net periodic pension cost	475	315	950	630
Contributions toward defined benefit pension plans			$ 0