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Discontinued Operations - Changes in Future Remaining Lease Obligations Discontinued Operations (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Discontinued Operations And Disposal Groups [Abstract]        
Balance, Beginning of Period $ 29,588 $ 52,597 $ 39,869 $ 46,755
Charges Incurred [1] 60 121 (641) 13,540
Net Cash Payments (3,456) (7,091) (13,612) (19,881)
Other [2] 50 336 626 5,549
Balance, End of Period $ 26,242 $ 45,963 $ 26,242 $ 45,963
[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.