Income Taxes (Schedule of Deferred Tax Asset (Liability)) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current [Abstract]
NOLs And Tax Credit Carry Forwards	$ 687	$ 55,322
Compensation And Benefit Plans	10,230	7,323
Allowance For Doubtful Accounts	392	1,029
Deferred Litigation Settlement Proceeds	114,210	0
Other Liabilities	1	127
Deferred Tax Assets, Gross, Current	125,520	63,801
Valuation Allowance, Current	(4,117)	(4,529)
Deferred Tax Assets, Net, Current	121,403	59,272
Noncurrent [Abstract]
NOLs And Tax Credit Carry Forwards	25,625	22,737
Compensation And Benefit Plans	13,768	10,944
Fixed assets and intangible assets	7,480	14,771
Interest rate swap contracts	4,971	7,064
Other Noncurrent	7,537	4,377
Deferred Tax Assets, Gross, Noncurrent	59,381	59,893
Valuation Allowance, Noncurrent	(1,947)	(4,252)
Deferred Tax Assets, Net, Noncurrent	57,434	55,641
Prepaid Liabilities	(668)	0
Investments In Partnerships	(85,907)	(107,546)
Deferred Tax Liabilities, Net Noncurrent	(86,575)	(107,546)
Net Deferred Tax Liability, Noncurrent	(29,141)	(51,905)
Total Net Deferred Tax Asset	$ 92,262	$ 7,367