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Discontinued Operations - Operating Results Relating to Assets Sold or Designated as Held for Sale (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Discontinued Operations And Disposal Groups [Abstract]        
Revenues $ 2,169 $ 7,786 $ 11,956 $ 27,164
Operating expenses 561 2,490 3,608 9,512
Impairment charges 0 5,698 12,661 61,165
Interest, net 412 1,547 2,609 5,957
Depreciation and amortization 454 1,691 2,941 7,322
Total expenses 1,427 11,426 21,819 83,956
Income (loss) from discontinued operations 742 (3,640) (9,863) (56,792)
Gain (loss) on disposition of real estate, net of tax 8,701 (176) 7,240 3,121
Income (loss) from discontinued operations $ 9,443 $ (3,816) $ (2,623) $ (53,671)