Employee Benefit Plans (Net Periodic Benefit 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
Employee Benefit Plans [Abstract]
Interest cost	$ 493	$ 525	$ 986	$ 1,050
Expected return on plan assets	(587)	(676)	(1,173)	(1,352)
Recognized actuarial loss	1,007	689	2,013	1,378
Settlement	0	391	0	604
Net periodic benefit cost	$ 913	$ 929	$ 1,826	$ 1,680