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Schedule III: Real Estate and Accumulated Depreciation (Parenthetical) (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
Property
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 589    
Tenant improvements, useful life Lease Term    
Balance, Beginning of Year $ 3,183,369 $ 3,119,547 $ 3,130,942
Acquisition of Real Estate Assets 161,074 84,526 69,481
Construction Costs and Improvements 142,535 104,782 100,207
Disposition of Real Estate Assets (162,636) (98,378) (142,369)
Impairment of Real Estate (626) 0 (2,652)
Write-off of Fully Depreciated Assets (26,067) (27,108) (36,062)
Balance, End of Year Including Real Estate Held for Sale 3,297,649 3,183,369 3,119,547
Real Estate Held for Sale (3,681) 0 0
Balance, End of Year Excluding Real Estate Held for Sale 3,293,968 3,183,369 3,119,547
Balance, Beginning of Year 786,978 748,044 735,593
Depreciation for Year 92,955 93,457 94,271
Disposition of Assets (61,365) (27,415) (45,758)
Write-off of Fully Depreciated Assets (26,067) (27,108) (36,062)
Balance, End of Year Including Real Estate Held for Sale 792,501 786,978 748,044
Real Estate Held for Sale (1,171) 0 0
Balance, End of Year Excluding Real Estate Held for Sale $ 791,330 $ 786,978 $ 748,044
Buildings and Improvements | Minimum      
Real Estate and Accumulated Depreciation [Line Items]      
Property, plant and equipment, useful life 7 years    
Buildings and Improvements | Maximum      
Real Estate and Accumulated Depreciation [Line Items]      
Property, plant and equipment, useful life 50 years    
Land Improvements | Minimum      
Real Estate and Accumulated Depreciation [Line Items]      
Property, plant and equipment, useful life 5 years    
Land Improvements | Maximum      
Real Estate and Accumulated Depreciation [Line Items]      
Property, plant and equipment, useful life 20 years    
5570 Tulane Dr [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 2    
Balance, End of Year Including Real Estate Held for Sale $ 1,840    
825-827 Avenue H D [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 2    
Balance, End of Year Including Real Estate Held for Sale $ 1,355    
One One Seven Two Eight Four One One Three Th Street D [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 2    
Balance, End of Year Including Real Estate Held for Sale $ 1,093    
1200-16 Avenue H D [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 2    
Balance, End of Year Including Real Estate Held for Sale $ 1,044    
8200 East Park Meadows Drive [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 2    
Balance, End of Year Including Real Estate Held for Sale $ 3,282    
3250 Quentin Street [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 2    
Balance, End of Year Including Real Estate Held for Sale $ 2,933    
1799-1855 Northfield Drive [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 2    
Balance, End of Year Including Real Estate Held for Sale $ 1,153    
6951 N Hanley [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 2    
Balance, End of Year Including Real Estate Held for Sale $ 1,915    
1908-2000 Innerbelt [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 2    
Balance, End of Year Including Real Estate Held for Sale $ 4,216    
7201-7281 Bryan Dairy Road [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 2    
Balance, End of Year Including Real Estate Held for Sale $ 1,287    
1080, 1120, 1180 John Papalas Drive [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 3    
Balance, End of Year Including Real Estate Held for Sale $ 2,080    
1322-66 W. North Carrier Parkway [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 3    
Balance, End of Year Including Real Estate Held for Sale $ 2,035    
Plano Crossing F [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 4    
Balance, End of Year Including Real Estate Held for Sale $ 4,060    
801-831 S Great Southwest Pkwy [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 5    
Balance, End of Year Including Real Estate Held for Sale $ 8,597    
4900- 4914 Creekside Drive [Member]      
Real Estate and Accumulated Depreciation [Line Items]      
Number of industrial properties | Property 8    
Balance, End of Year Including Real Estate Held for Sale $ 1,592