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Discontinued Operations - Operating Results Related to Assets Sold (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Discontinued Operations And Disposal Groups [Abstract]        
Revenues $ 5,596 $ 15,136 $ 21,185 $ 50,853
Operating expenses 1,164 4,031 5,220 14,285
Impairment charges 0 14,875 8,098 43,893
Interest, net 1,328 3,609 5,374 12,254
Depreciation and amortization 2,303 4,580 8,083 15,533
Total expenses, discontinued operations 4,795 27,095 26,775 85,965
Income (loss) from discontinued operations 801 (11,959) (5,590) (35,112)
Gain on disposition of real estate, net of tax 57,105 8,701 74,287 7,240
Income (loss) from discontinued operations $ 57,906 $ (3,258) $ 68,697 $ (27,872)