Employee Benefit Plans (Change in Defined Benefit Plan) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Change in benefit obligation
Benefit obligation	$ 118,505	$ 117,539
Defined Benefit Plan, Service Cost	321	309
Defined Benefit Plan, Interest Cost	6,088	6,326
Defined Benefit Plan, Actuarial Net (Gains) Losses	(10,576)	1,143
Defined Benefit Plan, Benefits Paid	(3,825)	(3,283)
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Benefit Obligation	(636)	(3,529)
Benefit obligation	109,877	118,505
Change in plan assets
Fair value of plan assets	93,642	88,234
Defined Benefit Plan, Contributions by Employer	1,524	1,468
Defined Benefit Plan, Actual Return on Plan Assets	5,852	9,810
Defined Benefit Plan, Benefits Paid	(3,825)	(3,283)
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	(809)	(2,587)
Fair value of plan assets	96,384	93,642
Underfunded satus	$ (13,493)	$ (24,863)