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Discontinued Operations (Changes In Future Remaining Lease Obligations Discontinued Operations) (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Lease expiration year     2019  
Balance, Beginning of Period $ 43,598 $ 46,682 $ 45,837 $ 50,378
Charges Incurred 416 [1] 1,992 [1] 713 [1] 819 [1]
Net Cash Payments (2,799) (3,311) (5,335) (5,834)
Other   (1,468) [2]   (1,468) [2]
Balance, End of Period $ 41,215 $ 43,895 $ 41,215 $ 43,895
[1] Includes charges for newly vacated spaces and subsequent adjustments for accretion, revised estimates, and variances between estimated and actual charges, net of any reversals for terminated lease obligations.
[2] Includes existing prepaid rent balances for newly vacated spaces that are netted with the losses incurred in the period recorded.