Employee Benefit Plans (Components Of Net Periodic Benefit Cost Pension Plan) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Service cost	$ 90	$ 337
Interest cost	1,693	1,768
Expected return on plan assets	(2,432)	(2,443)
Amortization of net actuarial pension loss	643	474
Net periodic benefit cost (income)	$ (6)	$ 136