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Discontinued Operations - Results for Discontinued Operations (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]    
Revenues   $ 2,425us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
Operating expenses   (1,330)us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense
Depreciation and amortization   (695)us-gaap_DepreciationAndAmortizationDiscontinuedOperations
Interest expense   (446)us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense
Gain on sale of real estate   4,425us-gaap_GainLossOnDispositionOfRealEstateDiscontinuedOperations
Income from discontinued operations $ 4,379us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax $ 4,379us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax