Schedule III - Real Estate and Accumulated Depreciation and Amortization - Schedule III (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 882,952
Land and Land Estates	743,125
Buildings and Improvements	3,038,034
Total	3,789,711	$ 3,671,560	$ 3,812,294	$ 3,564,466
Accumulated Depreciation and Amortization	812,207	795,486	$ 775,617	$ 738,068
Construction in progress	8,552	$ 14,946
Office Building [Member] | Little Rock, Arkansas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,353
Buildings and Improvements	2,260
Total	3,613
Accumulated Depreciation and Amortization	$ 545
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Pine Bluff, Arkansas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	271
Buildings and Improvements	603
Total	874
Accumulated Depreciation and Amortization	$ 228
Office Building [Member] | Pine Bluff, Arkansas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Office Building [Member] | Pine Bluff, Arkansas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Office Building [Member] | Pine Bluff, Arkansas [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Office Building [Member] | Glendale, Arizona [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	9,418
Buildings and Improvements	8,394
Total	17,812
Accumulated Depreciation and Amortization	$ 2,202
Office Building [Member] | Glendale, Arizona [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Office Building [Member] | Glendale, Arizona [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	24 years
Office Building [Member] | Glendale, Arizona [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Glendale, Arizona [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Phoenix, Arizona [Member] | Phoenix, AZ Office Property, Acquired Dec-12 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	5,585
Buildings and Improvements	36,923
Total	42,508
Accumulated Depreciation and Amortization	$ 3,278
Office Building [Member] | Phoenix, Arizona [Member] | Phoenix, AZ Office Property, Acquired Dec-12 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Phoenix, Arizona [Member] | Phoenix, AZ Office Property, Acquired Dec-12 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Phoenix, Arizona [Member] | Phoenix, AZ Office Property, Acquired Dec-12 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Phoenix, Arizona [Member] | Phoenix, AZ Office Property, Acquired Dec-12 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	17 years
Office Building [Member] | Phoenix, Arizona [Member] | Phoenix, AZ Office Property acquired May-00 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	4,666
Buildings and Improvements	24,856
Total	29,522
Accumulated Depreciation and Amortization	$ 9,515
Office Building [Member] | Phoenix, Arizona [Member] | Phoenix, AZ Office Property acquired May-00 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Office Building [Member] | Phoenix, Arizona [Member] | Phoenix, AZ Office Property acquired May-00 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Phoenix, Arizona [Member] | Phoenix, AZ Office Property acquired May-00 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	9 years
Office Building [Member] | Tempe, Arizona [Member] | Tempe, AZ Office Acquired Sep-12 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	0
Buildings and Improvements	13,086
Total	13,086
Accumulated Depreciation and Amortization	$ 1,505
Office Building [Member] | Tempe, Arizona [Member] | Tempe, AZ Office Acquired Sep-12 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Tempe, Arizona [Member] | Tempe, AZ Office Acquired Sep-12 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	36 years
Office Building [Member] | Tempe, Arizona [Member] | Tempe, AZ Office Acquired Sep-12 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Office Building [Member] | Tempe, Arizona [Member] | Tempe, AZ Office Acquired Sep-12 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Tempe, Arizona [Member] | Tempe, AZ Office Acquired Sep-12 [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Office Building [Member] | Tempe, Arizona [Member] | Tempe, AZ Office Acquired Sep-12 [Member] | Asset Component 4 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Tempe, Arizona [Member] | Tempe, AZ Office Acquired Dec-05 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 7,185
Land and Land Estates	0
Buildings and Improvements	9,442
Total	9,442
Accumulated Depreciation and Amortization	$ 2,884
Office Building [Member] | Tempe, Arizona [Member] | Tempe, AZ Office Acquired Dec-05 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	30 years
Office Building [Member] | Tempe, Arizona [Member] | Tempe, AZ Office Acquired Dec-05 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Tucson, Arizona [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	681
Buildings and Improvements	4,037
Total	4,718
Accumulated Depreciation and Amortization	$ 580
Office Building [Member] | Tucson, Arizona [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Office Building [Member] | Tucson, Arizona [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	30 years
Office Building [Member] | Tucson, Arizona [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Lake Forest, California [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	3,442
Buildings and Improvements	13,769
Total	17,211
Accumulated Depreciation and Amortization	$ 4,747
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Los Angeles, California [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	5,110
Buildings and Improvements	12,158
Total	17,268
Accumulated Depreciation and Amortization	$ 7,250
Office Building [Member] | Los Angeles, California [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Los Angeles, California [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Los Angeles, California [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Office Building [Member] | Palo Alto, California [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 48,512
Land and Land Estates	12,398
Buildings and Improvements	16,977
Total	29,375
Accumulated Depreciation and Amortization	$ 19,420
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Centenial, Colorado [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	4,851
Buildings and Improvements	15,239
Total	20,090
Accumulated Depreciation and Amortization	$ 5,889
Office Building [Member] | Centenial, Colorado [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Centenial, Colorado [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Englewood, Colorado [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,207
Buildings and Improvements	27,851
Total	30,058
Accumulated Depreciation and Amortization	$ 2,857
Office Building [Member] | Englewood, Colorado [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Englewood, Colorado [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Englewood, Colorado [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	19 years
Office Building [Member] | Lakewood, Colorado [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,569
Buildings and Improvements	10,286
Total	11,855
Accumulated Depreciation and Amortization	$ 6,102
Office Building [Member] | Lakewood, Colorado [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	2 years
Office Building [Member] | Lakewood, Colorado [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Lakewood, Colorado [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Office Building [Member] | Lakewood, Colorado [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Lakewood, Colorado [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Louisville, Colorado [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	3,657
Buildings and Improvements	11,217
Total	14,874
Accumulated Depreciation and Amortization	$ 3,069
Office Building [Member] | Louisville, Colorado [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Office Building [Member] | Louisville, Colorado [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Louisville, Colorado [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	9 years
Office Building [Member] | Louisville, Colorado [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Parachute, Colorado [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,400
Buildings and Improvements	10,751
Total	12,151
Accumulated Depreciation and Amortization	$ 581
Office Building [Member] | Parachute, Colorado [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	19 years
Office Building [Member] | Parachute, Colorado [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Parachute, Colorado [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	24 years
Office Building [Member] | Wallingford, Connecticut [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,049
Buildings and Improvements	4,773
Total	5,822
Accumulated Depreciation and Amortization	$ 1,652
Office Building [Member] | Wallingford, Connecticut [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Office Building [Member] | Wallingford, Connecticut [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Boca Raton, Florida [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 19,624
Land and Land Estates	4,290
Buildings and Improvements	17,160
Total	21,450
Accumulated Depreciation and Amortization	$ 5,524
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	4,438
Buildings and Improvements	15,271
Total	19,709
Accumulated Depreciation and Amortization	$ 5,302
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07 [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07 [Member] | Asset Component 4 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07, Property 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	4,535
Buildings and Improvements	14,939
Total	19,474
Accumulated Depreciation and Amortization	$ 5,298
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07, Property 2 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07, Property 2 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07, Property 2 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07, Property 2 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07, Property 2 [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Lake Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07, Property 2 [Member] | Asset Component 4 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	18 years
Office Building [Member] | Orlando, Florida [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 9,471
Land and Land Estates	3,538
Buildings and Improvements	9,844
Total	13,382
Accumulated Depreciation and Amortization	$ 5,361
Office Building [Member] | Orlando, Florida [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Orlando, Florida [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Orlando, Florida [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Office Building [Member] | Orlando, Florida [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Orlando, Florida [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Palm Beach Gardens, Florida [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	787
Buildings and Improvements	3,732
Total	4,519
Accumulated Depreciation and Amortization	$ 1,502
Office Building [Member] | Palm Beach Gardens, Florida [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Palm Beach Gardens, Florida [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Dec-13 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	146
Buildings and Improvements	559
Total	705
Accumulated Depreciation and Amortization	$ 36
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Dec-13 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Dec-13 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	35 years
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Dec-13, Property 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	895
Buildings and Improvements	5,496
Total	6,391
Accumulated Depreciation and Amortization	$ 322
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Dec-13, Property 2 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Dec-13, Property 2 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	38 years
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Sep-12 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,018
Buildings and Improvements	7,993
Total	10,011
Accumulated Depreciation and Amortization	$ 1,327
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Sep-12 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Sep-12 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	27 years
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Sep-12 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Dec-13, Property 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	398
Buildings and Improvements	1,571
Total	1,969
Accumulated Depreciation and Amortization	$ 100
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Dec-13, Property 3 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	14 years
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Dec-13, Property 3 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL Office Acquired Dec-13, Property 3 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | McDonough, Georgia [Member] | McDonough, GA Office Acquired Sep-12 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,443
Buildings and Improvements	11,433
Total	12,876
Accumulated Depreciation and Amortization	$ 1,443
Office Building [Member] | McDonough, Georgia [Member] | McDonough, GA Office Acquired Sep-12 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Office Building [Member] | McDonough, Georgia [Member] | McDonough, GA Office Acquired Sep-12 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	38 years
Office Building [Member] | McDonough, Georgia [Member] | McDonough, GA Office Acquired Sep-12 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | McDonough, Georgia [Member] | McDonough, GA Office Acquired Sep-12 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Office Building [Member] | McDonough, Georgia [Member] | McDonough, GA Office Acquired Sep-12, Property 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	693
Buildings and Improvements	6,405
Total	7,098
Accumulated Depreciation and Amortization	$ 858
Office Building [Member] | McDonough, Georgia [Member] | McDonough, GA Office Acquired Sep-12, Property 2 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Office Building [Member] | McDonough, Georgia [Member] | McDonough, GA Office Acquired Sep-12, Property 2 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | McDonough, Georgia [Member] | McDonough, GA Office Acquired Sep-12, Property 2 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Office Building [Member] | Meridian, Idaho [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 9,322
Land and Land Estates	2,255
Buildings and Improvements	7,797
Total	10,052
Accumulated Depreciation and Amortization	$ 1,339
Office Building [Member] | Meridian, Idaho [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Office Building [Member] | Meridian, Idaho [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	37 years
Office Building [Member] | Lisle, Illinois [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 9,449
Land and Land Estates	3,236
Buildings and Improvements	13,854
Total	17,090
Accumulated Depreciation and Amortization	$ 4,124
Office Building [Member] | Lisle, Illinois [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	2 years
Office Building [Member] | Lisle, Illinois [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Lisle, Illinois [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Office Building [Member] | Lisle, Illinois [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Lisle, Illinois [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Schaumburg, Illinois [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	5,007
Buildings and Improvements	22,340
Total	27,347
Accumulated Depreciation and Amortization	$ 3,247
Office Building [Member] | Schaumburg, Illinois [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Office Building [Member] | Schaumburg, Illinois [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	30 years
Office Building [Member] | Schaumburg, Illinois [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	9 years
Office Building [Member] | Schaumburg, Illinois [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Columbus, Indiana [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 20,986
Land and Land Estates	235
Buildings and Improvements	45,729
Total	45,964
Accumulated Depreciation and Amortization	$ 17,497
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Fishers, Indiana [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,808
Buildings and Improvements	19,373
Total	22,181
Accumulated Depreciation and Amortization	$ 5,831
Office Building [Member] | Fishers, Indiana [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Office Building [Member] | Fishers, Indiana [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Indianapolis, Indiana [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,700
Buildings and Improvements	18,491
Total	20,191
Accumulated Depreciation and Amortization	$ 12,977
Office Building [Member] | Indianapolis, Indiana [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Indianapolis, Indiana [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Indianapolis, Indiana [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS Office Acquired Sep-12 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 9,463
Land and Land Estates	2,828
Buildings and Improvements	6,075
Total	8,903
Accumulated Depreciation and Amortization	$ 961
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS Office Acquired Sep-12 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS Office Acquired Sep-12 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	37 years
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS Office Acquired Sep-12 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS Office Acquired Jul-08 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 36,666
Land and Land Estates	6,909
Buildings and Improvements	41,684
Total	48,593
Accumulated Depreciation and Amortization	$ 11,083
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS Office Acquired Jul-08 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS Office Acquired Jul-08 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS Office Acquired Jul-08 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS Office Acquired Jul-08 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS Office Acquired Jul-08 [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	14 years
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS Office Acquired Jul-08 [Member] | Asset Component 4 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Overland Park, Kansas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 34,134
Land and Land Estates	4,769
Buildings and Improvements	41,956
Total	46,725
Accumulated Depreciation and Amortization	$ 12,979
Office Building [Member] | Overland Park, Kansas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Overland Park, Kansas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Baton Rouge, Louisiana [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,252
Buildings and Improvements	11,085
Total	12,337
Accumulated Depreciation and Amortization	$ 3,889
Office Building [Member] | Baton Rouge, Louisiana [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Office Building [Member] | Baton Rouge, Louisiana [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Baton Rouge, Louisiana [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Office Building [Member] | Baton Rouge, Louisiana [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Office Building [Member] | Boston, Massachusetts [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 12,302
Land and Land Estates	3,814
Buildings and Improvements	16,040
Total	19,854
Accumulated Depreciation and Amortization	$ 3,653
Office Building [Member] | Boston, Massachusetts [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Boston, Massachusetts [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Oakland, Maine [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 8,850
Land and Land Estates	551
Buildings and Improvements	8,774
Total	9,325
Accumulated Depreciation and Amortization	$ 1,201
Office Building [Member] | Oakland, Maine [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Office Building [Member] | Oakland, Maine [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Oakland, Maine [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Auburn Hill, Michigan [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	4,416
Buildings and Improvements	30,012
Total	34,428
Accumulated Depreciation and Amortization	$ 1,211
Office Building [Member] | Auburn Hill, Michigan [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Office Building [Member] | Auburn Hill, Michigan [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Office Building [Member] | Auburn Hill, Michigan [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	14 years
Office Building [Member] | Livonia, Michigan [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	935
Buildings and Improvements	13,714
Total	14,649
Accumulated Depreciation and Amortization	$ 2,256
Office Building [Member] | Livonia, Michigan [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	2 years
Office Building [Member] | Livonia, Michigan [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	34 years
Office Building [Member] | Kansas City, Missouri [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 16,271
Land and Land Estates	2,433
Buildings and Improvements	20,154
Total	22,587
Accumulated Depreciation and Amortization	$ 6,215
Office Building [Member] | Kansas City, Missouri [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Kansas City, Missouri [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Saint Joseph, Missouri [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	607
Buildings and Improvements	14,004
Total	14,611
Accumulated Depreciation and Amortization	$ 1,472
Office Building [Member] | Saint Joseph, Missouri [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Saint Joseph, Missouri [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Pascagoula, Mississippi [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	618
Buildings and Improvements	3,677
Total	4,295
Accumulated Depreciation and Amortization	$ 587
Office Building [Member] | Pascagoula, Mississippi [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	1 year
Office Building [Member] | Pascagoula, Mississippi [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	31 years
Office Building [Member] | Pascagoula, Mississippi [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	9 years
Office Building [Member] | Omaha, Nebraska [Member] | Omaha, NE Office Acquired Nov-05 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 7,608
Land and Land Estates	2,566
Buildings and Improvements	8,324
Total	10,890
Accumulated Depreciation and Amortization	$ 2,564
Office Building [Member] | Omaha, Nebraska [Member] | Omaha, NE Office Acquired Nov-05 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	30 years
Office Building [Member] | Omaha, Nebraska [Member] | Omaha, NE Office Acquired Nov-05 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Omaha, Nebraska [Member] | Omaha, NE Office Acquired Dec-13 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,058
Buildings and Improvements	32,343
Total	34,401
Accumulated Depreciation and Amortization	$ 1,928
Office Building [Member] | Omaha, Nebraska [Member] | Omaha, NE Office Acquired Dec-13 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Omaha, Nebraska [Member] | Omaha, NE Office Acquired Dec-13 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Rockaway, New Jersey [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	4,646
Buildings and Improvements	23,143
Total	27,789
Accumulated Depreciation and Amortization	$ 5,695
Office Building [Member] | Rockaway, New Jersey [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Rockaway, New Jersey [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Rockaway, New Jersey [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Wall, New Jersey [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 17,536
Land and Land Estates	8,985
Buildings and Improvements	26,961
Total	35,946
Accumulated Depreciation and Amortization	$ 12,569
Office Building [Member] | Wall, New Jersey [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	22 years
Office Building [Member] | Wall, New Jersey [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Whippany, New Jersey [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 13,700
Land and Land Estates	4,063
Buildings and Improvements	19,711
Total	23,774
Accumulated Depreciation and Amortization	$ 7,397
Office Building [Member] | Whippany, New Jersey [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Whippany, New Jersey [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Las Vegas, Nevada [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	12,099
Buildings and Improvements	53,164
Total	65,263
Accumulated Depreciation and Amortization	$ 12,229
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Columbus, Ohio [Member] | Columbus, OH Office Acquired Dec-10 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,594
Buildings and Improvements	10,481
Total	12,075
Accumulated Depreciation and Amortization	$ 1,310
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Columbus, Ohio [Member] | Columbus, OH Office Acquired Jul-11 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	432
Buildings and Improvements	2,773
Total	3,205
Accumulated Depreciation and Amortization	$ 312
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Milford, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	3,124
Buildings and Improvements	16,140
Total	19,264
Accumulated Depreciation and Amortization	$ 5,755
Office Building [Member] | Milford, Ohio [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Milford, Ohio [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Westerville, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,085
Buildings and Improvements	9,411
Total	11,496
Accumulated Depreciation and Amortization	$ 2,853
Office Building [Member] | Westerville, Ohio [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Westerville, Ohio [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Eugene, Oregon [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,541
Buildings and Improvements	13,098
Total	14,639
Accumulated Depreciation and Amortization	$ 1,374
Office Building [Member] | Eugene, Oregon [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Office Building [Member] | Eugene, Oregon [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Eugene, Oregon [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Eugene, Oregon [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Eugene, Oregon [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Office Building [Member] | Redmond, Oregon [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,064
Buildings and Improvements	8,316
Total	10,380
Accumulated Depreciation and Amortization	$ 1,196
Office Building [Member] | Redmond, Oregon [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Office Building [Member] | Redmond, Oregon [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Redmond, Oregon [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Office Building [Member] | Harrisburg, Pennsylvania [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	900
Buildings and Improvements	11,310
Total	12,210
Accumulated Depreciation and Amortization	$ 7,924
Office Building [Member] | Harrisburg, Pennsylvania [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	2 years
Office Building [Member] | Harrisburg, Pennsylvania [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Harrisburg, Pennsylvania [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Harrisburg, Pennsylvania [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	9 years
Office Building [Member] | Harrisburg, Pennsylvania [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Harrisburg, Pennsylvania [Member] | Asset Component 4 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Harrisburg, Pennsylvania [Member] | Asset Component 5 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Jessup, Pennsylvania [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,520
Buildings and Improvements	17,678
Total	20,198
Accumulated Depreciation and Amortization	$ 2,391
Office Building [Member] | Jessup, Pennsylvania [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Office Building [Member] | Jessup, Pennsylvania [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Jessup, Pennsylvania [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Philadelphia, Pennsylvania [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	13,209
Buildings and Improvements	56,520
Total	69,729
Accumulated Depreciation and Amortization	$ 32,966
Office Building [Member] | Philadelphia, Pennsylvania [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Office Building [Member] | Philadelphia, Pennsylvania [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Charleston, South Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 7,185
Land and Land Estates	1,189
Buildings and Improvements	8,724
Total	9,913
Accumulated Depreciation and Amortization	$ 3,467
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Florence, South Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	774
Buildings and Improvements	3,629
Total	4,403
Accumulated Depreciation and Amortization	$ 412
Office Building [Member] | Florence, South Carolina [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Florence, South Carolina [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Fort Mill, South Carolina [Member] | Fort Mill, SC Office, Acquired Dec-02 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	3,601
Buildings and Improvements	15,340
Total	18,941
Accumulated Depreciation and Amortization	$ 4,953
Office Building [Member] | Fort Mill, South Carolina [Member] | Fort Mill, SC Office, Acquired Dec-02 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Fort Mill, South Carolina [Member] | Fort Mill, SC Office, Acquired Dec-02 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Fort Mill, South Carolina [Member] | Fort Mill, SC Office, Acquired Dec-02 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Office Building [Member] | Fort Mill, South Carolina [Member] | Fort Mill, SC Office, Acquired Dec-02 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Fort Mill, South Carolina [Member] | Fort Mill, SC Office, Acquired Nov-04 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,798
Buildings and Improvements	26,038
Total	27,836
Accumulated Depreciation and Amortization	$ 15,322
Office Building [Member] | Fort Mill, South Carolina [Member] | Fort Mill, SC Office, Acquired Nov-04 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Office Building [Member] | Fort Mill, South Carolina [Member] | Fort Mill, SC Office, Acquired Nov-04 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Fort Mill, South Carolina [Member] | Fort Mill, SC Office, Acquired Nov-04 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Rock Hill, South Carolina [Member] | Rock Hill, SC Office Acquired May-11 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	551
Buildings and Improvements	4,313
Total	4,864
Accumulated Depreciation and Amortization	$ 503
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Rock Hill, South Carolina [Member] | Rock Hill, SC Office Acquired Mar-14 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,601
Buildings and Improvements	21,000
Total	22,601
Accumulated Depreciation and Amortization	$ 1,053
Office Building [Member] | Rock Hill, South Carolina [Member] | Rock Hill, SC Office Acquired Mar-14 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	18 years
Office Building [Member] | Rock Hill, South Carolina [Member] | Rock Hill, SC Office Acquired Mar-14 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Rock Hill, South Carolina [Member] | Rock Hill, SC Office Acquired Mar-14 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Kingsport, Tennessee [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	513
Buildings and Improvements	403
Total	916
Accumulated Depreciation and Amortization	$ 155
Office Building [Member] | Kingsport, Tennessee [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Kingsport, Tennessee [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	14 years
Office Building [Member] | Kingsport, Tennessee [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Office Building [Member] | Knoxville, Tennessee [Member] | Knoxville, TN Office Acquired Mar-05 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,079
Buildings and Improvements	11,351
Total	12,430
Accumulated Depreciation and Amortization	$ 6,248
Office Building [Member] | Knoxville, Tennessee [Member] | Knoxville, TN Office Acquired Mar-05 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	9 years
Office Building [Member] | Knoxville, Tennessee [Member] | Knoxville, TN Office Acquired Mar-05 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Knoxville, Tennessee [Member] | Knoxville, TN Office Acquired Mar-05 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Knoxville, Tennessee [Member] | Knoxville, TN Office Acquired Mar-05 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Office Building [Member] | Knoxville, Tennessee [Member] | Knoxville, TN Office Acquired Mar-05 [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	14 years
Office Building [Member] | Knoxville, Tennessee [Member] | Knoxville, TN Office Acquired Sep-12 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	621
Buildings and Improvements	6,282
Total	6,903
Accumulated Depreciation and Amortization	$ 925
Office Building [Member] | Knoxville, Tennessee [Member] | Knoxville, TN Office Acquired Sep-12 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	1 year
Office Building [Member] | Knoxville, Tennessee [Member] | Knoxville, TN Office Acquired Sep-12 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Knoxville, Tennessee [Member] | Knoxville, TN Office Acquired Sep-12 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Knoxville, Tennessee [Member] | Knoxville, TN Office Acquired Sep-12 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Office Building [Member] | Memphis, Tennessee [Member] | Memphis, TN Office Acquired Nov-06 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 3,555
Land and Land Estates	467
Buildings and Improvements	4,467
Total	4,934
Accumulated Depreciation and Amortization	$ 1,681
Office Building [Member] | Memphis, Tennessee [Member] | Memphis, TN Office Acquired Nov-06 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Memphis, Tennessee [Member] | Memphis, TN Office Acquired Nov-06 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Memphis, Tennessee [Member] | Memphis, TN Office Acquired Dec-06 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	5,291
Buildings and Improvements	97,032
Total	102,323
Accumulated Depreciation and Amortization	$ 22,742
Office Building [Member] | Memphis, Tennessee [Member] | Memphis, TN Office Acquired Dec-06 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Office Building [Member] | Memphis, Tennessee [Member] | Memphis, TN Office Acquired Dec-06 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Allen, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	5,591
Buildings and Improvements	25,421
Total	31,012
Accumulated Depreciation and Amortization	$ 7,195
Office Building [Member] | Allen, Texas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Office Building [Member] | Allen, Texas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Office Building [Member] | Allen, Texas [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Office Building [Member] | Allen, Texas [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Office Building [Member] | Arlington, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,274
Buildings and Improvements	15,309
Total	16,583
Accumulated Depreciation and Amortization	$ 1,961
Office Building [Member] | Arlington, Texas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	1 year
Office Building [Member] | Arlington, Texas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Arlington, Texas [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Arlington, Texas [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Carrollton, Texas [Member] | Carrollton, TX Office Acquired Jun-04 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,789
Buildings and Improvements	18,157
Total	19,946
Accumulated Depreciation and Amortization	$ 8,645
Office Building [Member] | Carrollton, Texas [Member] | Carrollton, TX Office Acquired Jun-04 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	19 years
Office Building [Member] | Carrollton, Texas [Member] | Carrollton, TX Office Acquired Jun-04 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Carrollton, Texas [Member] | Carrollton, TX Office Acquired Jun-07 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,599
Buildings and Improvements	22,050
Total	24,649
Accumulated Depreciation and Amortization	$ 7,893
Office Building [Member] | Carrollton, Texas [Member] | Carrollton, TX Office Acquired Jun-07 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Office Building [Member] | Carrollton, Texas [Member] | Carrollton, TX Office Acquired Jun-07 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Carrollton, Texas [Member] | Carrollton, TX Office Acquired Jun-07, Property 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	828
Buildings and Improvements	0
Total	828
Accumulated Depreciation and Amortization	0
Office Building [Member] | Farmers Branch, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	18,380
Land and Land Estates	3,984
Buildings and Improvements	27,308
Total	31,292
Accumulated Depreciation and Amortization	$ 10,137
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Garland, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,161
Buildings and Improvements	833
Total	1,994
Accumulated Depreciation and Amortization	$ 0
Useful life computing depreciation in latest income statement (years)	1 year
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,875
Buildings and Improvements	10,675
Total	12,550
Accumulated Depreciation and Amortization	$ 6,745
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05, Property 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,875
Buildings and Improvements	10,959
Total	12,834
Accumulated Depreciation and Amortization	$ 6,824
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05, Property 2 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05, Property 2 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05, Property 2 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05, Property 2 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Mar-04 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	16,613
Buildings and Improvements	63,770
Total	80,383
Accumulated Depreciation and Amortization	$ 15,753
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Mar-04 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Mar-04 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05, Property 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	800
Buildings and Improvements	26,962
Total	27,762
Accumulated Depreciation and Amortization	$ 18,618
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05, Property 3 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	1 year
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05, Property 3 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05, Property 3 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Apr-05, Property 3 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Dec-13 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	481
Buildings and Improvements	2,352
Total	2,833
Accumulated Depreciation and Amortization	$ 187
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Dec-13 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Dec-13 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	31 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX Office Acquired Dec-13 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Office Building [Member] | Irving, Texas [Member] | Irving, TX Office Acquired Jun-07 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	4,889
Buildings and Improvements	29,738
Total	34,627
Accumulated Depreciation and Amortization	$ 10,532
Office Building [Member] | Irving, Texas [Member] | Irving, TX Office Acquired Jun-07 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Irving, Texas [Member] | Irving, TX Office Acquired Jun-07 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Irving, Texas [Member] | Irving, TX Office Acquired Jun-07 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Irving, Texas [Member] | Irving, TX Office Acquired May-07 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	7,476
Buildings and Improvements	45,985
Total	53,461
Accumulated Depreciation and Amortization	$ 17,532
Office Building [Member] | Irving, Texas [Member] | Irving, TX Office Acquired May-07 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Office Building [Member] | Irving, Texas [Member] | Irving, TX Office Acquired May-07 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Mission, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,556
Buildings and Improvements	2,911
Total	5,467
Accumulated Depreciation and Amortization	$ 635
Office Building [Member] | Mission, Texas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Office Building [Member] | Mission, Texas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	35 years
Office Building [Member] | Mission, Texas [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Office Building [Member] | San Antonio, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,800
Buildings and Improvements	15,619
Total	18,419
Accumulated Depreciation and Amortization	$ 11,534
Office Building [Member] | San Antonio, Texas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Office Building [Member] | San Antonio, Texas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | San Antonio, Texas [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | San Antonio, Texas [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Office Building [Member] | Temple, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 7,463
Land and Land Estates	227
Buildings and Improvements	8,181
Total	8,408
Accumulated Depreciation and Amortization	$ 1,462
Office Building [Member] | Temple, Texas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Office Building [Member] | Temple, Texas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Temple, Texas [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Temple, Texas [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Office Building [Member] | Westlake, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,361
Buildings and Improvements	23,572
Total	25,933
Accumulated Depreciation and Amortization	$ 9,510
Office Building [Member] | Westlake, Texas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Office Building [Member] | Westlake, Texas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Hampton, Virginia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,333
Buildings and Improvements	11,354
Total	13,687
Accumulated Depreciation and Amortization	$ 4,463
Office Building [Member] | Hampton, Virginia [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	2 years
Office Building [Member] | Hampton, Virginia [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Hampton, Virginia [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Office Building [Member] | Hampton, Virginia [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Hampton, Virginia [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Herndon, Virginia [Member] | Herndon, VA Office Acquired Dec-99 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	5,127
Buildings and Improvements	24,640
Total	29,767
Accumulated Depreciation and Amortization	$ 9,215
Office Building [Member] | Herndon, Virginia [Member] | Herndon, VA Office Acquired Dec-99 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	9 years
Office Building [Member] | Herndon, Virginia [Member] | Herndon, VA Office Acquired Dec-99 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Herndon, Virginia [Member] | Herndon, VA Office Acquired Jun-07 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	9,409
Buildings and Improvements	14,477
Total	23,886
Accumulated Depreciation and Amortization	$ 5,056
Office Building [Member] | Herndon, Virginia [Member] | Herndon, VA Office Acquired Jun-07 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Herndon, Virginia [Member] | Herndon, VA Office Acquired Jun-07 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Herndon, Virginia [Member] | Herndon, VA Office Acquired Jun-07 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Office Building [Member] | Midlothian, Virginia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,100
Buildings and Improvements	12,685
Total	13,785
Accumulated Depreciation and Amortization	$ 7,073
Office Building [Member] | Midlothian, Virginia [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Office Building [Member] | Midlothian, Virginia [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Midlothian, Virginia [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Office Building [Member] | Midlothian, Virginia [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Office Building [Member] | Richmond, Virginia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	7,331
Buildings and Improvements	88,021
Total	95,352
Accumulated Depreciation and Amortization	$ 345
Office Building [Member] | Richmond, Virginia [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Office Building [Member] | Richmond, Virginia [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Office Building [Member] | Richmond, Virginia [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Office Building [Member] | Bremerton, Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 5,534
Land and Land Estates	1,655
Buildings and Improvements	5,445
Total	7,100
Accumulated Depreciation and Amortization	$ 917
Office Building [Member] | Bremerton, Washington [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Office Building [Member] | Bremerton, Washington [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Bremerton, Washington [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Office Building [Member] | Huntington, West Virginia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 6,500
Land and Land Estates	1,368
Buildings and Improvements	9,527
Total	10,895
Accumulated Depreciation and Amortization	$ 1,270
Office Building [Member] | Huntington, West Virginia [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	14 years
Office Building [Member] | Huntington, West Virginia [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Orlando, Florida [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,030
Buildings and Improvements	10,869
Total	11,899
Accumulated Depreciation and Amortization	$ 2,758
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Tampa, Florida [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,160
Buildings and Improvements	8,431
Total	10,591
Accumulated Depreciation and Amortization	$ 5,905
Industrial Property [Member] | Tampa, Florida [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	9 years
Industrial Property [Member] | Tampa, Florida [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | McDonough, Georgia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 22,224
Land and Land Estates	2,463
Buildings and Improvements	24,291
Total	26,754
Accumulated Depreciation and Amortization	$ 5,859
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Columbus, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,990
Buildings and Improvements	10,580
Total	12,570
Accumulated Depreciation and Amortization	$ 3,131
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Memphis, Tennessee [Member] | Memphis, TN Industrial Acquired Feb-88 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,054
Buildings and Improvements	11,538
Total	12,592
Accumulated Depreciation and Amortization	$ 11,414
Industrial Property [Member] | Memphis, Tennessee [Member] | Memphis, TN Industrial Acquired Feb-88 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Industrial Property [Member] | Memphis, Tennessee [Member] | Memphis, TN Industrial Acquired Feb-88 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Industrial Property [Member] | Memphis, Tennessee [Member] | Memphis, TN Industrial Acquired Dec-06 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,553
Buildings and Improvements	12,326
Total	13,879
Accumulated Depreciation and Amortization	$ 3,412
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Houston, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	4,674
Buildings and Improvements	19,540
Total	24,214
Accumulated Depreciation and Amortization	$ 1,603
Industrial Property [Member] | Houston, Texas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Industrial Property [Member] | Houston, Texas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Industrial Property [Member] | Houston, Texas [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | Anniston, Alabama [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,201
Buildings and Improvements	16,771
Total	17,972
Accumulated Depreciation and Amortization	$ 790
Industrial Property [Member] | Anniston, Alabama [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Industrial Property [Member] | Anniston, Alabama [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	24 years
Industrial Property [Member] | Anniston, Alabama [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Industrial Property [Member] | Moody, Alabama [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	654
Buildings and Improvements	9,943
Total	10,597
Accumulated Depreciation and Amortization	$ 6,205
Industrial Property [Member] | Moody, Alabama [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Industrial Property [Member] | Moody, Alabama [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Lavonia, Georgia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 7,676
Land and Land Estates	171
Buildings and Improvements	7,657
Total	7,828
Accumulated Depreciation and Amortization	$ 722
Industrial Property [Member] | Lavonia, Georgia [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Industrial Property [Member] | Lavonia, Georgia [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Lavonia, Georgia [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Industrial Property [Member] | Thomson, Georgia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	909
Buildings and Improvements	7,746
Total	8,655
Accumulated Depreciation and Amortization	$ 249
Industrial Property [Member] | Thomson, Georgia [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Industrial Property [Member] | Thomson, Georgia [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Industrial Property [Member] | Thomson, Georgia [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Industrial Property [Member] | Des Moines, Iowa [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,528
Buildings and Improvements	14,247
Total	15,775
Accumulated Depreciation and Amortization	$ 1,953
Industrial Property [Member] | Des Moines, Iowa [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Industrial Property [Member] | Des Moines, Iowa [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	34 years
Industrial Property [Member] | Des Moines, Iowa [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Industrial Property [Member] | Dubuque, Iowa [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 9,055
Land and Land Estates	2,052
Buildings and Improvements	8,443
Total	10,495
Accumulated Depreciation and Amortization	$ 2,755
Industrial Property [Member] | Dubuque, Iowa [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Industrial Property [Member] | Dubuque, Iowa [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Dubuque, Iowa [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Industrial Property [Member] | Rantoul, Illinois [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,304
Buildings and Improvements	32,562
Total	33,866
Accumulated Depreciation and Amortization	$ 1,789
Industrial Property [Member] | Rantoul, Illinois [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Industrial Property [Member] | Rantoul, Illinois [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Rantoul, Illinois [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	21 years
Industrial Property [Member] | Rockford, Illinois [Member] | Rockford, IL Industrial Acquired Dec-06 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	371
Buildings and Improvements	2,573
Total	2,944
Accumulated Depreciation and Amortization	$ 666
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Rockford, Illinois [Member] | Rockford, IL Industrial Acquired Dec-06, Property 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	509
Buildings and Improvements	5,289
Total	5,798
Accumulated Depreciation and Amortization	$ 1,305
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Plymouth, Indiana [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 5,807
Land and Land Estates	254
Buildings and Improvements	8,110
Total	8,364
Accumulated Depreciation and Amortization	$ 971
Industrial Property [Member] | Plymouth, Indiana [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Industrial Property [Member] | Plymouth, Indiana [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	34 years
Industrial Property [Member] | Plymouth, Indiana [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Industrial Property [Member] | Plymouth, Indiana [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Industrial Property [Member] | Plymouth, Indiana [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Industrial Property [Member] | Dry Ridge, Kentucky [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	560
Buildings and Improvements	12,553
Total	13,113
Accumulated Depreciation and Amortization	$ 4,580
Industrial Property [Member] | Dry Ridge, Kentucky [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	22 years
Industrial Property [Member] | Dry Ridge, Kentucky [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Elizabethtown, Kentucky [Member] | Elizabethtown, Kentucky Industrial Acquired Jun-05 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	352
Buildings and Improvements	4,862
Total	5,214
Accumulated Depreciation and Amortization	$ 1,774
Industrial Property [Member] | Elizabethtown, Kentucky [Member] | Elizabethtown, Kentucky Industrial Acquired Jun-05 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Industrial Property [Member] | Elizabethtown, Kentucky [Member] | Elizabethtown, Kentucky Industrial Acquired Jun-05 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Elizabethtown, Kentucky [Member] | Elizabethtown, Kentucky Industrial Acquired Jun-05, Property 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	890
Buildings and Improvements	26,868
Total	27,758
Accumulated Depreciation and Amortization	$ 9,804
Industrial Property [Member] | Elizabethtown, Kentucky [Member] | Elizabethtown, Kentucky Industrial Acquired Jun-05, Property 2 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Industrial Property [Member] | Elizabethtown, Kentucky [Member] | Elizabethtown, Kentucky Industrial Acquired Jun-05, Property 2 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Hopkinsville, Kentucky [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	631
Buildings and Improvements	16,154
Total	16,785
Accumulated Depreciation and Amortization	$ 6,234
Industrial Property [Member] | Hopkinsville, Kentucky [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Industrial Property [Member] | Hopkinsville, Kentucky [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Owensboro, Kentucky [Member] | Owensboro, KY Industrial Acquired Jun-05 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	393
Buildings and Improvements	11,956
Total	12,349
Accumulated Depreciation and Amortization	$ 4,984
Industrial Property [Member] | Owensboro, Kentucky [Member] | Owensboro, KY Industrial Acquired Jun-05 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Industrial Property [Member] | Owensboro, Kentucky [Member] | Owensboro, KY Industrial Acquired Jun-05 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Owensboro, Kentucky [Member] | Owensboro, KY Industrial Acquired Dec-06 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	819
Buildings and Improvements	2,439
Total	3,258
Accumulated Depreciation and Amortization	$ 860
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Shreveport, Louisiana [Member] | Shreveport, LA Industrial Acquired Mar-07 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 19,000
Land and Land Estates	860
Buildings and Improvements	21,840
Total	22,700
Accumulated Depreciation and Amortization	$ 4,800
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Shreveport, Louisiana [Member] | Shreveport, LA Industrial Acquired Jun-12 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,078
Buildings and Improvements	10,134
Total	11,212
Accumulated Depreciation and Amortization	$ 1,305
Industrial Property [Member] | Shreveport, Louisiana [Member] | Shreveport, LA Industrial Acquired Jun-12 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Industrial Property [Member] | Shreveport, Louisiana [Member] | Shreveport, LA Industrial Acquired Jun-12 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Shreveport, Louisiana [Member] | Shreveport, LA Industrial Acquired Jun-12 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | North Berwick, Maine [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 4,810
Land and Land Estates	1,383
Buildings and Improvements	35,659
Total	37,042
Accumulated Depreciation and Amortization	$ 7,713
Industrial Property [Member] | North Berwick, Maine [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | North Berwick, Maine [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | North Berwick, Maine [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Industrial Property [Member] | Kalamazoo, Michigan [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,942
Buildings and Improvements	14,169
Total	16,111
Accumulated Depreciation and Amortization	$ 1,898
Industrial Property [Member] | Kalamazoo, Michigan [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Industrial Property [Member] | Kalamazoo, Michigan [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Kalamazoo, Michigan [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	9 years
Industrial Property [Member] | Marshall, Michigan [Member] | Marshall, MI Industrial Acquired Aug-87 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	40
Buildings and Improvements	2,236
Total	2,276
Accumulated Depreciation and Amortization	$ 854
Industrial Property [Member] | Marshall, Michigan [Member] | Marshall, MI Industrial Acquired Aug-87 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	9 years
Industrial Property [Member] | Marshall, Michigan [Member] | Marshall, MI Industrial Acquired Aug-87 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Marshall, Michigan [Member] | Marshall, MI Industrial Acquired Aug-87 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | Marshall, Michigan [Member] | Marshall, MI Industrial Acquired Aug-87 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Industrial Property [Member] | Marshall, Michigan [Member] | Marshall, MI Industrial Acquired Aug-87 [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Industrial Property [Member] | Marshall, Michigan [Member] | Marshall, MI Industrial Acquired Aug-87 [Member] | Asset Component 4 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Industrial Property [Member] | Marshall, Michigan [Member] | Marshall, MI Industrial Acquired Sep-12 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	143
Buildings and Improvements	4,302
Total	4,445
Accumulated Depreciation and Amortization	$ 1,575
Industrial Property [Member] | Marshall, Michigan [Member] | Marshall, MI Industrial Acquired Sep-12 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Industrial Property [Member] | Marshall, Michigan [Member] | Marshall, MI Industrial Acquired Sep-12 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | Marshall, Michigan [Member] | Marshall, MI Industrial Acquired Sep-12 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Industrial Property [Member] | Plymouth, Michigan [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,296
Buildings and Improvements	13,608
Total	15,904
Accumulated Depreciation and Amortization	$ 5,124
Industrial Property [Member] | Plymouth, Michigan [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	30 years
Industrial Property [Member] | Plymouth, Michigan [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Temperance, Michigan [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	3,040
Buildings and Improvements	14,924
Total	17,964
Accumulated Depreciation and Amortization	$ 4,139
Industrial Property [Member] | Temperance, Michigan [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	2 years
Industrial Property [Member] | Temperance, Michigan [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Temperance, Michigan [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Industrial Property [Member] | Minneapolis, Minnesota [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,886
Buildings and Improvements	1,922
Total	3,808
Accumulated Depreciation and Amortization	$ 204
Industrial Property [Member] | Minneapolis, Minnesota [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Industrial Property [Member] | Minneapolis, Minnesota [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Minneapolis, Minnesota [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	29 years
Industrial Property [Member] | Byhalia, Mississippi [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 15,000
Land and Land Estates	1,006
Buildings and Improvements	35,825
Total	36,831
Accumulated Depreciation and Amortization	$ 2,912
Industrial Property [Member] | Byhalia, Mississippi [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Industrial Property [Member] | Byhalia, Mississippi [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Canton, Mississippi [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	5,077
Buildings and Improvements	71,289
Total	76,366
Accumulated Depreciation and Amortization	$ 2,590
Industrial Property [Member] | Canton, Mississippi [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Industrial Property [Member] | Canton, Mississippi [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	51 years
Industrial Property [Member] | Canton, Mississippi [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Industrial Property [Member] | Canton, Mississippi [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Industrial Property [Member] | Olive Branch, Mississippi [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	198
Buildings and Improvements	10,276
Total	10,474
Accumulated Depreciation and Amortization	$ 6,771
Industrial Property [Member] | Olive Branch, Mississippi [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Industrial Property [Member] | Olive Branch, Mississippi [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Olive Branch, Mississippi [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Industrial Property [Member] | Franklin, North Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	296
Buildings and Improvements	1,320
Total	1,616
Accumulated Depreciation and Amortization	$ 211
Industrial Property [Member] | Franklin, North Carolina [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	2 years
Industrial Property [Member] | Franklin, North Carolina [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	29 years
Industrial Property [Member] | Franklin, North Carolina [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Industrial Property [Member] | Henderson, North Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,488
Buildings and Improvements	5,953
Total	7,441
Accumulated Depreciation and Amortization	$ 2,102
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | High Point, North Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,330
Buildings and Improvements	11,183
Total	12,513
Accumulated Depreciation and Amortization	$ 5,688
Industrial Property [Member] | High Point, North Carolina [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	18 years
Industrial Property [Member] | High Point, North Carolina [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Lumberton, North Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	405
Buildings and Improvements	12,049
Total	12,454
Accumulated Depreciation and Amortization	$ 3,488
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Shelby, North Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,421
Buildings and Improvements	18,862
Total	20,283
Accumulated Depreciation and Amortization	$ 3,180
Industrial Property [Member] | Shelby, North Carolina [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Industrial Property [Member] | Shelby, North Carolina [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Shelby, North Carolina [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Industrial Property [Member] | Statesville, North Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	891
Buildings and Improvements	16,771
Total	17,662
Accumulated Depreciation and Amortization	$ 4,561
Industrial Property [Member] | Statesville, North Carolina [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Industrial Property [Member] | Statesville, North Carolina [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Statesville, North Carolina [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Industrial Property [Member] | Durham, New Hampshire [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	3,464
Buildings and Improvements	18,094
Total	21,558
Accumulated Depreciation and Amortization	$ 5,320
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Erwin, New York [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 7,887
Land and Land Estates	1,648
Buildings and Improvements	12,355
Total	14,003
Accumulated Depreciation and Amortization	$ 1,371
Industrial Property [Member] | Erwin, New York [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Industrial Property [Member] | Erwin, New York [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	34 years
Industrial Property [Member] | Erwin, New York [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Industrial Property [Member] | Erwin, New York [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | Long Island City, New York [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 49,144
Land and Land Estates	0
Buildings and Improvements	42,624
Total	42,624
Accumulated Depreciation and Amortization	$ 8,042
Useful life computing depreciation in latest income statement (years)	15 years
Industrial Property [Member] | North Las Vegas, Nevada [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	3,244
Buildings and Improvements	21,732
Total	24,976
Accumulated Depreciation and Amortization	$ 1,053
Industrial Property [Member] | North Las Vegas, Nevada [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	19 years
Industrial Property [Member] | North Las Vegas, Nevada [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | North Las Vegas, Nevada [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Industrial Property [Member] | Chillicothe, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	735
Buildings and Improvements	9,021
Total	9,756
Accumulated Depreciation and Amortization	$ 1,886
Industrial Property [Member] | Chillicothe, Ohio [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 years
Industrial Property [Member] | Chillicothe, Ohio [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	26 years
Industrial Property [Member] | Chillicothe, Ohio [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Industrial Property [Member] | Cincinnati, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,049
Buildings and Improvements	8,784
Total	9,833
Accumulated Depreciation and Amortization	$ 2,174
Industrial Property [Member] | Cincinnati, Ohio [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | Cincinnati, Ohio [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Cincinnati, Ohio [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	14 years
Industrial Property [Member] | Glenwillow, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 15,326
Land and Land Estates	2,228
Buildings and Improvements	24,530
Total	26,758
Accumulated Depreciation and Amortization	$ 5,979
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Hebron, Ohio [Member] | Hebron, OH Industrial, Acquired Dec-97 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,063
Buildings and Improvements	4,581
Total	5,644
Accumulated Depreciation and Amortization	$ 1,516
Industrial Property [Member] | Hebron, Ohio [Member] | Hebron, OH Industrial, Acquired Dec-97 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | Hebron, Ohio [Member] | Hebron, OH Industrial, Acquired Dec-97 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Hebron, Ohio [Member] | Hebron, OH Industrial, Acquired Dec-97 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Industrial Property [Member] | Hebron, Ohio [Member] | Hebron, OH Industrial, Acquired Dec-01 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,681
Buildings and Improvements	7,854
Total	9,535
Accumulated Depreciation and Amortization	$ 2,857
Industrial Property [Member] | Hebron, Ohio [Member] | Hebron, OH Industrial, Acquired Dec-01 [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	1 year
Industrial Property [Member] | Hebron, Ohio [Member] | Hebron, OH Industrial, Acquired Dec-01 [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Hebron, Ohio [Member] | Hebron, OH Industrial, Acquired Dec-01 [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	2 years
Industrial Property [Member] | Hebron, Ohio [Member] | Hebron, OH Industrial, Acquired Dec-01 [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Industrial Property [Member] | Hebron, Ohio [Member] | Hebron, OH Industrial, Acquired Dec-01 [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Industrial Property [Member] | Hebron, Ohio [Member] | Hebron, OH Industrial, Acquired Dec-01 [Member] | Asset Component 4 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | Hebron, Ohio [Member] | Hebron, OH Industrial, Acquired Dec-01 [Member] | Asset Component 5 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Industrial Property [Member] | Streetsboro, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 17,626
Land and Land Estates	2,441
Buildings and Improvements	25,092
Total	27,533
Accumulated Depreciation and Amortization	$ 7,238
Industrial Property [Member] | Streetsboro, Ohio [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Industrial Property [Member] | Streetsboro, Ohio [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Streetsboro, Ohio [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Industrial Property [Member] | Streetsboro, Ohio [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Industrial Property [Member] | Bristol, Pennsylvania [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,508
Buildings and Improvements	15,863
Total	18,371
Accumulated Depreciation and Amortization	$ 6,020
Industrial Property [Member] | Bristol, Pennsylvania [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | Bristol, Pennsylvania [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Bristol, Pennsylvania [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	16 years
Industrial Property [Member] | Bristol, Pennsylvania [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	30 years
Industrial Property [Member] | Chester, South Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 8,738
Land and Land Estates	1,629
Buildings and Improvements	8,470
Total	10,099
Accumulated Depreciation and Amortization	$ 1,031
Industrial Property [Member] | Chester, South Carolina [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	9 years
Industrial Property [Member] | Chester, South Carolina [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	34 years
Industrial Property [Member] | Chester, South Carolina [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Industrial Property [Member] | Duncan, South Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	884
Buildings and Improvements	8,626
Total	9,510
Accumulated Depreciation and Amortization	$ 1,945
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Laurens, South Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	5,552
Buildings and Improvements	21,559
Total	27,111
Accumulated Depreciation and Amortization	$ 5,980
Industrial Property [Member] | Laurens, South Carolina [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	2 years
Industrial Property [Member] | Laurens, South Carolina [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Laurens, South Carolina [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Industrial Property [Member] | Laurens, South Carolina [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Industrial Property [Member] | Laurens, South Carolina [Member] | Asset Component 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Industrial Property [Member] | Collierville, Tennessee [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	714
Buildings and Improvements	4,783
Total	5,497
Accumulated Depreciation and Amortization	$ 1,951
Industrial Property [Member] | Collierville, Tennessee [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	9 years
Industrial Property [Member] | Collierville, Tennessee [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Collierville, Tennessee [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	14 years
Industrial Property [Member] | Collierville, Tennessee [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	21 years
Industrial Property [Member] | Crossville, Tennessee [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	545
Buildings and Improvements	6,999
Total	7,544
Accumulated Depreciation and Amortization	$ 3,512
Industrial Property [Member] | Crossville, Tennessee [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	17 years
Industrial Property [Member] | Crossville, Tennessee [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Franklin, Tennessee [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	0
Buildings and Improvements	5,673
Total	5,673
Accumulated Depreciation and Amortization	$ 1,659
Industrial Property [Member] | Franklin, Tennessee [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	1 year
Industrial Property [Member] | Franklin, Tennessee [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Industrial Property [Member] | Franklin, Tennessee [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Industrial Property [Member] | Lewisburg, Tennessee [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	173
Buildings and Improvements	10,865
Total	11,038
Accumulated Depreciation and Amortization	$ 565
Industrial Property [Member] | Lewisburg, Tennessee [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Industrial Property [Member] | Lewisburg, Tennessee [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	34 years
Industrial Property [Member] | Lewisburg, Tennessee [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	18 years
Industrial Property [Member] | Millington, Tennessee [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	723
Buildings and Improvements	19,383
Total	20,106
Accumulated Depreciation and Amortization	$ 10,163
Industrial Property [Member] | Millington, Tennessee [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	9 years
Industrial Property [Member] | Millington, Tennessee [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Millington, Tennessee [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | Millington, Tennessee [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	16 years
Industrial Property [Member] | Brookshire, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,388
Buildings and Improvements	16,614
Total	19,002
Accumulated Depreciation and Amortization	$ 583
Industrial Property [Member] | Brookshire, Texas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Industrial Property [Member] | Brookshire, Texas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Industrial Property [Member] | Brookshire, Texas [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Industrial Property [Member] | Waxahachie, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	652
Buildings and Improvements	13,045
Total	13,697
Accumulated Depreciation and Amortization	$ 9,926
Industrial Property [Member] | Waxahachie, Texas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | Waxahachie, Texas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Waxahachie, Texas [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	16 years
Industrial Property [Member] | Winchester, Virginia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	3,823
Buildings and Improvements	12,276
Total	16,099
Accumulated Depreciation and Amortization	$ 3,396
Industrial Property [Member] | Winchester, Virginia [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Industrial Property [Member] | Winchester, Virginia [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Bingen, Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	0
Buildings and Improvements	18,075
Total	18,075
Accumulated Depreciation and Amortization	$ 1,475
Industrial Property [Member] | Bingen, Washington [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | Bingen, Washington [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Bingen, Washington [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Industrial Property [Member] | Richland, Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 110,000
Land and Land Estates	1,293
Buildings and Improvements	126,947
Total	128,240
Accumulated Depreciation and Amortization	$ 876
Industrial Property [Member] | Richland, Washington [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | Richland, Washington [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Industrial Property [Member] | Richland, Washington [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Industrial Property [Member] | Oak Creek, Wisconsin [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	3,015
Buildings and Improvements	15,300
Total	18,315
Accumulated Depreciation and Amortization	$ 287
Industrial Property [Member] | Oak Creek, Wisconsin [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Industrial Property [Member] | Oak Creek, Wisconsin [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Industrial Property [Member] | Oak Creek, Wisconsin [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Land / Infrastructure [Member] | Houston, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	15,055
Buildings and Improvements	57,949
Total	73,004
Accumulated Depreciation and Amortization	$ 4,960
Land / Infrastructure [Member] | Houston, Texas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	11 years
Land / Infrastructure [Member] | Houston, Texas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	35 years
Land / Infrastructure [Member] | Houston, Texas [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Land / Infrastructure [Member] | Houston, Texas [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	16 years
Land / Infrastructure [Member] | Venice, Florida [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	4,696
Buildings and Improvements	11,753
Total	16,449
Accumulated Depreciation and Amortization	$ 2,123
Land / Infrastructure [Member] | Venice, Florida [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Land / Infrastructure [Member] | Venice, Florida [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Land / Infrastructure [Member] | Clive, Iowa [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	371
Buildings and Improvements	0
Total	371
Accumulated Depreciation and Amortization	0
Land / Infrastructure [Member] | Baltimore, Maryland [Member] | Baltimore, MD Land/Infrastructure Acquired Dec-06 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	4,605
Buildings and Improvements	0
Total	4,605
Accumulated Depreciation and Amortization	0
Land / Infrastructure [Member] | Baltimore, Maryland [Member] | Baltimore, MD Land/Infrastructure Acquired Dec-15 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	5,000
Buildings and Improvements	0
Total	5,000
Accumulated Depreciation and Amortization	0
Land / Infrastructure [Member] | New York, New York [Member] | New York, NY Land/Infrastructure, Acquired Oct-13 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	65,218
Buildings and Improvements	0
Total	65,218
Accumulated Depreciation and Amortization	0
Land / Infrastructure [Member] | New York, New York [Member] | New York, NY Land/Infrastructure Acquired Oct-13, Property 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	213,301
Land and Land Estates	73,148
Buildings and Improvements	0
Total	73,148
Accumulated Depreciation and Amortization	0
Land / Infrastructure [Member] | New York, New York [Member] | New York, NY Land/Infrastructure Acquired Oct-13, Property 3 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	86,569
Buildings and Improvements	0
Total	86,569
Accumulated Depreciation and Amortization	0
Land / Infrastructure [Member] | New York, New York [Member] | New York, NY Land/Infrastructure Acquired Oct-14 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	29,193
Land and Land Estates	22,000
Buildings and Improvements	0
Total	22,000
Accumulated Depreciation and Amortization	0
Land / Infrastructure [Member] | Missouri City, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	14,555
Buildings and Improvements	5,895
Total	20,450
Accumulated Depreciation and Amortization	$ 3,088
Useful life computing depreciation in latest income statement (years)	7 years
Land / Infrastructure [Member] | Danville, Virginia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	3,454
Buildings and Improvements	0
Total	3,454
Accumulated Depreciation and Amortization	0
Multi-tenanted [Member] | Phoenix, Arizona [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,831
Buildings and Improvements	15,211
Total	17,042
Accumulated Depreciation and Amortization	$ 3,502
Multi-tenanted [Member] | Phoenix, Arizona [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Multi-tenanted [Member] | Phoenix, Arizona [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Multi-tenanted [Member] | Palm Beach Gardens, Florida [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	4,066
Buildings and Improvements	21,638
Total	25,704
Accumulated Depreciation and Amortization	$ 7,527
Multi-tenanted [Member] | Palm Beach Gardens, Florida [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Multi-tenanted [Member] | Palm Beach Gardens, Florida [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Multi-tenanted [Member] | Florence, South Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	3,235
Buildings and Improvements	13,141
Total	16,376
Accumulated Depreciation and Amortization	$ 4,540
Multi-tenanted [Member] | Florence, South Carolina [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	10 years
Multi-tenanted [Member] | Florence, South Carolina [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Multi-tenanted [Member] | Florence, South Carolina [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Multi-tenanted [Member] | Florence, South Carolina [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	20 years
Multi-tenanted [Member] | Arlington, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	589
Buildings and Improvements	6,382
Total	6,971
Accumulated Depreciation and Amortization	$ 830
Multi-tenanted [Member] | Arlington, Texas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	1 year
Multi-tenanted [Member] | Arlington, Texas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Multi-tenanted [Member] | Arlington, Texas [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Multi-tenanted [Member] | Honolulu, Hawaii [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	8,259
Buildings and Improvements	7,363
Total	15,622
Accumulated Depreciation and Amortization	$ 1,759
Multi-tenanted [Member] | Honolulu, Hawaii [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	2 years
Multi-tenanted [Member] | Honolulu, Hawaii [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Multi-tenanted [Member] | Honolulu, Hawaii [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Multi-tenanted [Member] | Westmont, Illinios [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	7,812
Buildings and Improvements	1,178
Total	8,990
Accumulated Depreciation and Amortization	$ 24
Useful life computing depreciation in latest income statement (years)	25 years
Multi-tenanted [Member] | Foxboro, Massachusetts [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,231
Buildings and Improvements	25,662
Total	27,893
Accumulated Depreciation and Amortization	$ 14,355
Multi-tenanted [Member] | Foxboro, Massachusetts [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	1 year
Multi-tenanted [Member] | Foxboro, Massachusetts [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Multi-tenanted [Member] | Foxboro, Massachusetts [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	16 years
Multi-tenanted [Member] | Southfield, Michigan [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	0
Buildings and Improvements	15,434
Total	15,434
Accumulated Depreciation and Amortization	$ 7,840
Multi-tenanted [Member] | Southfield, Michigan [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Multi-tenanted [Member] | Southfield, Michigan [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Multi-tenanted [Member] | Southfield, Michigan [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	16 years
Multi-tenanted [Member] | Southfield, Michigan [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Multi-tenanted [Member] | Bridgeton, Missouri [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	603
Buildings and Improvements	1,271
Total	1,874
Accumulated Depreciation and Amortization	$ 51
Multi-tenanted [Member] | Bridgeton, Missouri [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Multi-tenanted [Member] | Bridgeton, Missouri [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	32 years
Multi-tenanted [Member] | Bridgewater, New Jersey [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 14,118
Land and Land Estates	1,415
Buildings and Improvements	6,802
Total	8,217
Accumulated Depreciation and Amortization	$ 438
Multi-tenanted [Member] | Bridgewater, New Jersey [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Multi-tenanted [Member] | Bridgewater, New Jersey [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Multi-tenanted [Member] | Bridgewater, New Jersey [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Multi-tenanted [Member] | Canonsburg, Pennsylvania [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,705
Buildings and Improvements	10,910
Total	12,615
Accumulated Depreciation and Amortization	$ 4,189
Multi-tenanted [Member] | Canonsburg, Pennsylvania [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	8 years
Multi-tenanted [Member] | Canonsburg, Pennsylvania [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Multi-tenanted [Member] | Antioch, Tennessee [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	3,847
Buildings and Improvements	12,569
Total	16,416
Accumulated Depreciation and Amortization	$ 1,840
Multi-tenanted [Member] | Antioch, Tennessee [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Multi-tenanted [Member] | Antioch, Tennessee [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Manteca, California [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 834
Land and Land Estates	2,082
Buildings and Improvements	6,464
Total	8,546
Accumulated Depreciation and Amortization	$ 1,680
Retail / Specialty [Member] | Manteca, California [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	23 years
Retail / Specialty [Member] | Manteca, California [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | San Diego, California [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 532
Land and Land Estates	0
Buildings and Improvements	13,310
Total	13,310
Accumulated Depreciation and Amortization	$ 2,961
Retail / Specialty [Member] | San Diego, California [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	23 years
Retail / Specialty [Member] | San Diego, California [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Albany, Georgia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,468
Buildings and Improvements	5,137
Total	6,605
Accumulated Depreciation and Amortization	$ 344
Retail / Specialty [Member] | Albany, Georgia [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	15 years
Retail / Specialty [Member] | Albany, Georgia [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Atlanta, Georgia [Member] | Atlanta, GA Retail Acquired Dec-06 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,014
Buildings and Improvements	269
Total	1,283
Accumulated Depreciation and Amortization	$ 297
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Atlanta, Georgia [Member] | Atlanta, GA Retail Acquired Dec-06, Property 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	870
Buildings and Improvements	187
Total	1,057
Accumulated Depreciation and Amortization	$ 242
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Chamblee, Georgia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	770
Buildings and Improvements	186
Total	956
Accumulated Depreciation and Amortization	$ 237
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Cumming, Georgia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,558
Buildings and Improvements	1,368
Total	2,926
Accumulated Depreciation and Amortization	$ 666
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Forest Park, Georgia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	668
Buildings and Improvements	1,242
Total	1,910
Accumulated Depreciation and Amortization	$ 446
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Jonesboro, Georgia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	778
Buildings and Improvements	146
Total	924
Accumulated Depreciation and Amortization	$ 213
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Stone Mountain, Georgia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	672
Buildings and Improvements	276
Total	948
Accumulated Depreciation and Amortization	$ 219
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Galesburg, Illinois [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 468
Land and Land Estates	560
Buildings and Improvements	2,366
Total	2,926
Accumulated Depreciation and Amortization	$ 714
Retail / Specialty [Member] | Galesburg, Illinois [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Retail / Specialty [Member] | Galesburg, Illinois [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Lawrence, Indiana [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	404
Buildings and Improvements	1,737
Total	2,141
Accumulated Depreciation and Amortization	$ 399
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Jefferson, North Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	71
Buildings and Improvements	884
Total	955
Accumulated Depreciation and Amortization	$ 230
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Lexington, North Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	832
Buildings and Improvements	1,429
Total	2,261
Accumulated Depreciation and Amortization	$ 322
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Thomasville, North Carolina [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	208
Buildings and Improvements	561
Total	769
Accumulated Depreciation and Amortization	$ 73
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Vineland, New Jersey [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	2,698
Buildings and Improvements	12,790
Total	15,488
Accumulated Depreciation and Amortization	$ 505
Retail / Specialty [Member] | Vineland, New Jersey [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 years
Retail / Specialty [Member] | Vineland, New Jersey [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Vineland, New Jersey [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	28 years
Retail / Specialty [Member] | Portchester, New York [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	3,841
Buildings and Improvements	5,246
Total	9,087
Accumulated Depreciation and Amortization	$ 869
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Watertown, New York [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 785
Land and Land Estates	386
Buildings and Improvements	5,162
Total	5,548
Accumulated Depreciation and Amortization	$ 1,414
Retail / Specialty [Member] | Watertown, New York [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	23 years
Retail / Specialty [Member] | Watertown, New York [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Canton, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	884
Buildings and Improvements	3,534
Total	4,418
Accumulated Depreciation and Amortization	$ 1,248
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Franklin, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	213
Buildings and Improvements	262
Total	475
Accumulated Depreciation and Amortization	$ 6
Retail / Specialty [Member] | Franklin, Ohio [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	24 years
Retail / Specialty [Member] | Franklin, Ohio [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	32 years
Retail / Specialty [Member] | Lorain, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 1,181
Land and Land Estates	1,893
Buildings and Improvements	7,024
Total	8,917
Accumulated Depreciation and Amortization	$ 1,827
Retail / Specialty [Member] | Lorain, Ohio [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	23 years
Retail / Specialty [Member] | Lorain, Ohio [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Lawton, Oklahoma [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	663
Buildings and Improvements	1,288
Total	1,951
Accumulated Depreciation and Amortization	$ 441
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Oklahoma City, Oklahoma [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,782
Buildings and Improvements	912
Total	2,694
Accumulated Depreciation and Amortization	$ 448
Retail / Specialty [Member] | Oklahoma City, Oklahoma [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Retail / Specialty [Member] | Oklahoma City, Oklahoma [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Retail / Specialty [Member] | Tulsa, Oklahoma [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	445
Buildings and Improvements	2,433
Total	2,878
Accumulated Depreciation and Amortization	$ 2,405
Retail / Specialty [Member] | Tulsa, Oklahoma [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	14 years
Retail / Specialty [Member] | Tulsa, Oklahoma [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	24 years
Retail / Specialty [Member] | Chattanooga, Tennessee [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	487
Buildings and Improvements	956
Total	1,443
Accumulated Depreciation and Amortization	$ 121
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Paris, Tennessee [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	247
Buildings and Improvements	547
Total	794
Accumulated Depreciation and Amortization	$ 180
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Staunton, Virginia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	1,028
Buildings and Improvements	326
Total	1,354
Accumulated Depreciation and Amortization	$ 97
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Edmonds, Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 0
Land and Land Estates	0
Buildings and Improvements	3,947
Total	3,947
Accumulated Depreciation and Amortization	$ 1,079
Useful life computing depreciation in latest income statement (years)	40 years
Retail / Specialty [Member] | Fairlea, West Virginia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	$ 551
Land and Land Estates	501
Buildings and Improvements	1,985
Total	2,486
Accumulated Depreciation and Amortization	$ 490
Retail / Specialty [Member] | Fairlea, West Virginia [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Retail / Specialty [Member] | Fairlea, West Virginia [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years