Accrued Payroll Costs And Retirement Obligations (Employee Retirement Obligations) (Details) (Chief Executive Officer [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Chief Executive Officer [Member]
Accrued Payroll Costs And Retirement Obligations [Line Items]
Deferred compensation plan and other benefits related to the Company's Chief Executive Officer	$ 71,603	$ 67,891

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.

No definition available.

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