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Accrued Payroll Costs and Retirement Obligations (Employee Retirement Obligations) (Details) (Chief Executive Officer [Member], USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Chief Executive Officer [Member]
Deferred compensation plan and other benefits related to the Company's Chief Executive Officer	$ 69,761	$ 67,891

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ Details

Name:	us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant