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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, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Discontinued Operations And Disposal Groups [Abstract]        
Balance, Beginning of Period $ 48,091 $ 43,739 $ 43,900 $ 46,298
Charges Incurred 5,893 [1] 1,181 [1] 13,196 [1] 954 [1]
Net Cash Payments (5,469) (3,674) (12,017) (5,968)
Other 1,151 [2] (27) [2] 4,587 [2] (65) [2]
Balance, End of Period $ 49,666 $ 41,219 $ 49,666 $ 41,219
[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 and deferred rent liability balances for newly vacated spaces that are netted with the losses incurred in the period recorded.