Employee Benefit Plans (Change in Defined Benefit Plan) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Change in benefit obligation
Benefit obligation	$ 109,877	$ 118,505
Defined Benefit Plan, Service Cost	317	321
Defined Benefit Plan, Interest Cost	5,638	6,088
Defined Benefit Plan, Actuarial Net (Gains) Losses	7,134	(10,576)
Defined Benefit Plan, Benefits Paid	(3,506)	(3,825)
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Benefit Obligation	5,291	(636)
Benefit obligation	124,751	109,877
Change in plan assets
Fair value of plan assets	96,384	93,642
Defined Benefit Plan, Contributions by Employer	1,904	1,524
Defined Benefit Plan, Actual Return on Plan Assets	7,536	5,852
Defined Benefit Plan, Benefits Paid	(3,506)	(3,825)
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	4,580	(809)
Fair value of plan assets	106,898	96,384
Underfunded satus	$ (17,853)	$ (13,493)