Schedule III - Real Estate and Accumulated Depreciation and Amortization - Schedule III (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	945,216
Land and Land Estates	755,168
Buildings and Improvements	2,901,446
Total	3,671,560	3,812,294	3,564,466	3,172,246
Accumulated Depreciation and Amortization	795,486	775,617	738,068	638,368
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	0
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] | 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	2,452
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	7,347
Total	9,507
Accumulated Depreciation and Amortization	5,664
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	22,512
Land and Land Estates	2,463
Buildings and Improvements	24,291
Total	26,754
Accumulated Depreciation and Amortization	5,175
Useful life computing depreciation in latest income statement (years)	40 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	895
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] | Dry Ridge, Kentucky [Member] | Cross-collateralized [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,351
Land and Land Estates	560
Buildings and Improvements	12,553
Total	13,113
Accumulated Depreciation and Amortization	4,144
Industrial Property [Member] | Dry Ridge, Kentucky [Member] | Cross-collateralized [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] | Cross-collateralized [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, KY LTL Industrial Acquired Jun-05 [Member] | Cross-collateralized [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	11,986
Land and Land Estates	890
Buildings and Improvements	26,868
Total	27,758
Accumulated Depreciation and Amortization	8,870
Industrial Property [Member] | Elizabethtown, Kentucky [Member] | Elizabethtown, KY LTL Industrial Acquired Jun-05 [Member] | Cross-collateralized [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, KY LTL Industrial Acquired Jun-05 [Member] | Cross-collateralized [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, KY LTL Industrial Acquired Jun-05, Property 2 [Member] | Cross-collateralized [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	2,252
Land and Land Estates	352
Buildings and Improvements	4,862
Total	5,214
Accumulated Depreciation and Amortization	1,605
Industrial Property [Member] | Elizabethtown, Kentucky [Member] | Elizabethtown, KY LTL Industrial Acquired Jun-05, Property 2 [Member] | Cross-collateralized [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, KY LTL Industrial Acquired Jun-05, Property 2 [Member] | Cross-collateralized [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	7,003
Land and Land Estates	631
Buildings and Improvements	16,154
Total	16,785
Accumulated Depreciation and Amortization	5,624
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]
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	782
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Owensboro, Kentucky [Member] | Cross-collateralized [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,959
Land and Land Estates	393
Buildings and Improvements	11,956
Total	12,349
Accumulated Depreciation and Amortization	4,488
Industrial Property [Member] | Owensboro, Kentucky [Member] | Cross-collateralized [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] | Cross-collateralized [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 LTL 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	4,254
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	932
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] | 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	144
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	21,483
Total	22,489
Accumulated Depreciation and Amortization	1,969
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	2,473
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] | 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	4,759
Useful life computing depreciation in latest income statement (years)	40 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	421
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] | Long Island City, New York [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	0
Buildings and Improvements	42,624
Total	42,624
Accumulated Depreciation and Amortization	5,200
Useful life computing depreciation in latest income statement (years)	15 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	1,442
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	1,835
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] | 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	2,783
Useful life computing depreciation in latest income statement (years)	40 years
Industrial Property [Member] | Glenwillow, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	15,583
Land and Land Estates	2,228
Buildings and Improvements	24,530
Total	26,758
Accumulated Depreciation and Amortization	5,340
Useful life computing depreciation in latest income statement (years)	40 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	5,461
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	9,387
Land and Land Estates	1,629
Buildings and Improvements	8,470
Total	10,099
Accumulated Depreciation and Amortization	722
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] | 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	3,159
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] | 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	226
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] | Eau Claire, Wisconsin [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	421
Buildings and Improvements	5,590
Total	6,011
Accumulated Depreciation and Amortization	556
Industrial Property [Member] | Eau Claire, 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] | Eau Claire, Wisconsin [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	28 years
Industrial Property [Member] | Eau Claire, Wisconsin [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] | Lavonia, Georgia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	7,959
Land and Land Estates	171
Buildings and Improvements	7,657
Total	7,828
Accumulated Depreciation and Amortization	505
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] | 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	11,390
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	3,033
Useful life computing depreciation in latest income statement (years)	40 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	5,683
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] | Jacksonville, Florida [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	573
Buildings and Improvements	1,592
Total	2,165
Accumulated Depreciation and Amortization	451
Industrial Property [Member] | Jacksonville, Florida [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	1 year
Industrial Property [Member] | Jacksonville, 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] | 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	1,367
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	9,303
Land and Land Estates	2,052
Buildings and Improvements	8,443
Total	10,495
Accumulated Depreciation and Amortization	2,530
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] | 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	604
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	1,160
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	5,928
Land and Land Estates	254
Buildings and Improvements	7,969
Total	8,223
Accumulated Depreciation and Amortization	686
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] | North Berwick, Maine [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	6,145
Land and Land Estates	1,383
Buildings and Improvements	32,397
Total	33,780
Accumulated Depreciation and Amortization	6,775
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] | Kalamazoo, Michigan [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	15,295
Land and Land Estates	1,942
Buildings and Improvements	14,169
Total	16,111
Accumulated Depreciation and Amortization	1,328
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 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	1,103
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] | 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	700
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] | 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	4,641
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	3,768
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] | 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	6,515
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	67
Land and Land Estates	296
Buildings and Improvements	1,320
Total	1,616
Accumulated Depreciation and Amortization	151
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	1,953
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	5,192
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	3,101
Useful life computing depreciation in latest income statement (years)	40 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	4,164
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] | Erwin, New York [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	8,311
Land and Land Estates	1,648
Buildings and Improvements	10,810
Total	12,458
Accumulated Depreciation and Amortization	951
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] | 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	4,271
Total	5,334
Accumulated Depreciation and Amortization	1,393
Useful life computing depreciation in latest income statement (years)	40 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	7,224
Total	8,905
Accumulated Depreciation and Amortization	2,641
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] | Streetsboro, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	17,910
Land and Land Estates	2,441
Buildings and Improvements	25,092
Total	27,533
Accumulated Depreciation and Amortization	6,452
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] | 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	1,716
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	21,177
Total	26,729
Accumulated Depreciation and Amortization	5,438
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)	5 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	1,588
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] | 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	1,172
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] | 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	9,234
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] | 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	9,558
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	3,081
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	543
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
Multi-tenanted [Member] | Phoenix, Arizona [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,831
Buildings and Improvements	14,892
Total	16,723
Accumulated Depreciation and Amortization	2,715
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] | 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	663
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] | Palm Beach Gardens, Florida [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	4,066
Buildings and Improvements	19,915
Total	23,981
Accumulated Depreciation and Amortization	6,331
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	13,081
Total	16,316
Accumulated Depreciation and Amortization	4,203
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)	20 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	1,529
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] | Baltimore, Maryland [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	55,000
Land and Land Estates	37,564
Buildings and Improvements	156,557
Total	194,121
Accumulated Depreciation and Amortization	46,609
Multi-tenanted [Member] | Baltimore, Maryland [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	5 years
Multi-tenanted [Member] | Baltimore, Maryland [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Multi-tenanted [Member] | Bridgeton, Missouri [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	603
Buildings and Improvements	1,142
Total	1,745
Accumulated Depreciation and Amortization	0
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	225
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] | Rochester, New York [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	17,257
Land and Land Estates	164
Buildings and Improvements	5,304
Total	5,468
Accumulated Depreciation and Amortization	136
Multi-tenanted [Member] | Rochester, New York [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	1 year
Multi-tenanted [Member] | Rochester, New York [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	33 years
Multi-tenanted [Member] | Rochester, 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
Multi-tenanted [Member] | Rochester, New York [Member] | Asset Component 2 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	12 years
Multi-tenanted [Member] | Rochester, New York [Member] | Asset Component 3 [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	1,055
Buildings and Improvements	10,910
Total	11,965
Accumulated Depreciation and Amortization	3,831
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	10,043
Total	13,890
Accumulated Depreciation and Amortization	1,411
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
Multi-tenanted [Member] | Issaquah, Washington [Member] | Issaquah, WA Multi-tenanted Acquired Jun-07 [Member] | Cross-collateralized [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	30,388
Land and Land Estates	3,052
Buildings and Improvements	5,210
Total	8,262
Accumulated Depreciation and Amortization	0
Multi-tenanted [Member] | Issaquah, Washington [Member] | Issaquah, WA Multi-tenanted Acquired Jun-07 [Member] | Cross-collateralized [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	4 years
Multi-tenanted [Member] | Issaquah, Washington [Member] | Issaquah, WA Multi-tenanted Acquired Jun-07 [Member] | Cross-collateralized [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	32 years
Multi-tenanted [Member] | Issaquah, Washington [Member] | Issaquah, WA Multi-tenanted Acquired Jun-07 [Member] | Cross-collateralized [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Multi-tenanted [Member] | Issaquah, Washington [Member] | Issaquah, WA Multi-tenanted Acquired Jun-07, Property 2 [Member] | Cross-collateralized [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,732
Buildings and Improvements	6,213
Total	9,945
Accumulated Depreciation and Amortization	0
Multi-tenanted [Member] | Issaquah, Washington [Member] | Issaquah, WA Multi-tenanted Acquired Jun-07, Property 2 [Member] | Cross-collateralized [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Multi-tenanted [Member] | Issaquah, Washington [Member] | Issaquah, WA Multi-tenanted Acquired Jun-07, Property 2 [Member] | Cross-collateralized [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	32 years
Office Building [Member] | Phoenix, Arizona [Member] | Phoenix, AZ LTL Office Property, Acquired Dec-12 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	5,585
Buildings and Improvements	36,099
Total	41,684
Accumulated Depreciation and Amortization	2,167
Office Building [Member] | Phoenix, Arizona [Member] | Phoenix, AZ LTL 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 LTL 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 LTL 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)	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	8,495
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 LTL Office Acquired Dec-05 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	7,344
Land and Land Estates	0
Buildings and Improvements	9,442
Total	9,442
Accumulated Depreciation and Amortization	2,597
Office Building [Member] | Tempe, Arizona [Member] | Tempe, AZ LTL 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 LTL 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] | 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	12,461
Total	12,461
Accumulated Depreciation and Amortization	1,015
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)	10 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)	11 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)	15 years
Office Building [Member] | Los Angeles, California [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	9,843
Land and Land Estates	5,110
Buildings and Improvements	12,158
Total	17,268
Accumulated Depreciation and Amortization	6,493
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] | 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	1,818
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] | Louisville, Colorado [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	3,657
Buildings and Improvements	9,605
Total	13,262
Accumulated Depreciation and Amortization	2,574
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] | 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	278
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] | Orlando, Florida [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	11,498
Buildings and Improvements	66,996
Total	78,494
Accumulated Depreciation and Amortization	38,974
Office Building [Member] | Orlando, Florida [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	3 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)	5 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)	10 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)	11 years
Office Building [Member] | Orlando, Florida [Member] | Asset Component 4 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Office Building [Member] | Orlando, Florida [Member] | Asset Component 5 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	25 years
Office Building [Member] | Orlando, Florida [Member] | Orlando, FL Office Acquired Jan-07 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	9,602
Land and Land Estates	3,538
Buildings and Improvements	9,708
Total	13,246
Accumulated Depreciation and Amortization	4,681
Office Building [Member] | Orlando, Florida [Member] | Orlando, FL Office Acquired Jan-07 [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] | Orlando, FL Office Acquired Jan-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] | Orlando, Florida [Member] | Orlando, FL Office Acquired Jan-07 [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] | Orlando, FL Office Acquired Jan-07 [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] | Orlando, FL Office Acquired Jan-07 [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] | Orlando, Florida [Member] | Orlando, FL Office Acquired Dec-06 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	586
Buildings and Improvements	35,012
Total	35,598
Accumulated Depreciation and Amortization	7,267
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Tampa, Florida [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,018
Buildings and Improvements	7,950
Total	9,968
Accumulated Depreciation and Amortization	924
Office Building [Member] | Tampa, Florida [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] | 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 LTL Office Acquired Dec-13 [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	168
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL LTL 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 LTL Office Acquired Dec-13 [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 LTL Office Acquired Dec-13, Property 2 [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	19
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL LTL 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 LTL 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)	35 years
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL LTL 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	45
Office Building [Member] | Tampa, Florida [Member] | Tampa, FL LTL 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 LTL 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 LTL 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 LTL Office Acquired Sep-12 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	11,466
Land and Land Estates	1,443
Buildings and Improvements	11,234
Total	12,677
Accumulated Depreciation and Amortization	1,046
Office Building [Member] | McDonough, Georgia [Member] | McDonough, GA LTL 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 LTL 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 LTL 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)	11 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	693
Buildings and Improvements	6,405
Total	7,098
Accumulated Depreciation and Amortization	601
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)	6 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)	40 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)	11 years
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS LTL Office Acquired Jul-08 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	38,296
Land and Land Estates	6,909
Buildings and Improvements	41,693
Total	48,602
Accumulated Depreciation and Amortization	9,602
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS LTL 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 LTL 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 LTL 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 LTL 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)	14 years
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS LTL 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)	15 years
Office Building [Member] | Lexena, Kansas [Member] | Lenexa, KS Office Acquired Sep-12 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	9,854
Land and Land Estates	2,828
Buildings and Improvements	6,075
Total	8,903
Accumulated Depreciation and Amortization	673
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] | 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	1,030
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] | Omaha, Nebraska [Member] | Omaha, NE LTL 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	964
Office Building [Member] | Omaha, Nebraska [Member] | Omaha, NE LTL 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 LTL 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] | Omaha, Nebraska [Member] | Omaha, NE LTL Office Acquired Nov-05 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	7,776
Land and Land Estates	2,566
Buildings and Improvements	8,324
Total	10,890
Accumulated Depreciation and Amortization	2,310
Office Building [Member] | Omaha, Nebraska [Member] | Omaha, NE LTL 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 LTL 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] | Rockaway, New Jersey [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	4,646
Buildings and Improvements	20,467
Total	25,113
Accumulated Depreciation and Amortization	5,143
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)	20 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] | 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	10,870
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	1,048
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	243
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	916
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] | 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	1,691
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] | Rock Hill, South Carolina [Member] | Rock Hill, SC LTL Office Acquired Mar-14 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,601
Buildings and Improvements	18,989
Total	20,590
Accumulated Depreciation and Amortization	464
Office Building [Member] | Rock Hill, South Carolina [Member] | Rock Hill, SC LTL 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 LTL 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 LTL 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] | 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	395
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	5,441
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	1,452
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]
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	7,861
Office Building [Member] | Carrollton, Texas [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] | 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 LTL Office Acquired Jun-07 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	18,850
Land and Land Estates	2,599
Buildings and Improvements	22,050
Total	24,649
Accumulated Depreciation and Amortization	7,099
Office Building [Member] | Carrollton, Texas [Member] | Carrollton, TX LTL 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 LTL 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 LTL 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] | Houston, Texas [Member] | Houston, TX LTL 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	97
Office Building [Member] | Houston, Texas [Member] | Houston, TX LTL 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 LTL 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 LTL 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] | Houston, Texas [Member] | Houston, TX LTL Office Acquired Apr-05 [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	6,148
Office Building [Member] | Houston, Texas [Member] | Houston, TX LTL Office Acquired Apr-05 [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 LTL 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 LTL 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)	13 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX LTL 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)	20 years
Office Building [Member] | Houston, Texas [Member] | Houston, TX LTL Office Acquired Mar-04 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	23,206
Land and Land Estates	16,613
Buildings and Improvements	58,226
Total	74,839
Accumulated Depreciation and Amortization	14,158
Office Building [Member] | Houston, Texas [Member] | Houston, TX LTL 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 LTL 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 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,875
Buildings and Improvements	10,585
Total	12,460
Accumulated Depreciation and Amortization	6,110
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)	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	800
Buildings and Improvements	26,962
Total	27,762
Accumulated Depreciation and Amortization	16,694
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)	10 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)	11 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] | 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	946
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
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	490
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	162
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	8,260
Total	17,678
Accumulated Depreciation and Amortization	1,532
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)	20 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	406
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	4,403
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Palo Alto, California [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	53,536
Land and Land Estates	12,398
Buildings and Improvements	16,977
Total	29,375
Accumulated Depreciation and Amortization	18,175
Useful life computing depreciation in latest income statement (years)	40 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	108
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] | Centennial, Colorado [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	4,851
Buildings and Improvements	15,187
Total	20,038
Accumulated Depreciation and Amortization	5,289
Office Building [Member] | Centennial, 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] | Centennial, 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]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,569
Buildings and Improvements	8,857
Total	10,426
Accumulated Depreciation and Amortization	5,496
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] | 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	1,472
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	19,870
Land and Land Estates	4,290
Buildings and Improvements	17,160
Total	21,450
Accumulated Depreciation and Amortization	5,095
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [Member] | Fort Meyers, Florida [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	795
Buildings and Improvements	2,941
Total	3,736
Accumulated Depreciation and Amortization	671
Office Building [Member] | Fort Meyers, 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] | Fort Meyers, Florida [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	32 years
Office Building [Member] | Fort Meyers, Florida [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 Mary, Florida [Member] | Lake Mary, FL Office Acquired Jun-07 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	4,535
Buildings and Improvements	14,830
Total	19,365
Accumulated Depreciation and Amortization	4,809
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)	4 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)	7 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	4,438
Buildings and Improvements	15,103
Total	19,541
Accumulated Depreciation and Amortization	4,799
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)	4 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)	7 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	3,704
Total	4,491
Accumulated Depreciation and Amortization	1,282
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] | Clive, Iowa [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	1,158
Buildings and Improvements	0
Total	1,158
Accumulated Depreciation and Amortization	0
Office Building [Member] | Meridian, Idaho [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	9,746
Land and Land Estates	2,255
Buildings and Improvements	7,797
Total	10,052
Accumulated Depreciation and Amortization	937
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	9,613
Land and Land Estates	3,236
Buildings and Improvements	13,747
Total	16,983
Accumulated Depreciation and Amortization	3,636
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	22,086
Total	27,093
Accumulated Depreciation and Amortization	1,787
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] | Columbus, Indiana [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	25,129
Land and Land Estates	235
Buildings and Improvements	45,729
Total	45,964
Accumulated Depreciation and Amortization	10,947
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	5,337
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	18,461
Total	20,161
Accumulated Depreciation and Amortization	12,590
Office Building [Member] | Indianapolis, Indiana [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	6 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] | Overland Park, Kansas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	34,733
Land and Land Estates	4,769
Buildings and Improvements	41,956
Total	46,725
Accumulated Depreciation and Amortization	11,583
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	3,341
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	12,540
Land and Land Estates	3,814
Buildings and Improvements	16,040
Total	19,854
Accumulated Depreciation and Amortization	3,157
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] | Foxboro, Massachusetts [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	2,231
Buildings and Improvements	25,653
Total	27,884
Accumulated Depreciation and Amortization	13,053
Office Building [Member] | Foxboro, Massachusetts [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	16 years
Office Building [Member] | Foxboro, 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	9,061
Land and Land Estates	551
Buildings and Improvements	8,774
Total	9,325
Accumulated Depreciation and Amortization	841
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] | 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	1,681
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] | Southfield, Michigan [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	0
Buildings and Improvements	12,124
Total	12,124
Accumulated Depreciation and Amortization	7,223
Office Building [Member] | Southfield, Michigan [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	7 years
Office Building [Member] | Southfield, Michigan [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Office Building [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
Office Building [Member] | Kansas City, Missouri [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	16,559
Land and Land Estates	2,433
Buildings and Improvements	20,154
Total	22,587
Accumulated Depreciation and Amortization	5,546
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] | 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	447
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] | Wall, New Jersey [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	19,870
Land and Land Estates	8,985
Buildings and Improvements	26,961
Total	35,946
Accumulated Depreciation and Amortization	11,518
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	14,153
Land and Land Estates	4,063
Buildings and Improvements	19,711
Total	23,774
Accumulated Depreciation and Amortization	6,586
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] | 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	5,277
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	9,341
Total	11,426
Accumulated Depreciation and Amortization	2,535
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] | 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	837
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	7,857
Land and Land Estates	900
Buildings and Improvements	10,693
Total	11,593
Accumulated Depreciation and Amortization	7,802
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)	9 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)	15 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)	20 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	56,037
Total	69,246
Accumulated Depreciation and Amortization	29,667
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	7,277
Land and Land Estates	1,189
Buildings and Improvements	8,724
Total	9,913
Accumulated Depreciation and Amortization	3,087
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	307
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 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	13,912
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] | 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	4,513
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] | 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	11,146
Total	12,225
Accumulated Depreciation and Amortization	5,630
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)	10 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)	11 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)	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	668
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	3,617
Land and Land Estates	464
Buildings and Improvements	4,467
Total	4,931
Accumulated Depreciation and Amortization	1,497
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	20,215
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] | Farmers Branch, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	18,408
Land and Land Estates	3,984
Buildings and Improvements	27,308
Total	31,292
Accumulated Depreciation and Amortization	9,006
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	2,218
Buildings and Improvements	8,473
Total	10,691
Accumulated Depreciation and Amortization	3,060
Office Building [Member] | Garland, 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] | Garland, Texas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	18 years
Office Building [Member] | Garland, Texas [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] | 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	15,558
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] | 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	9,497
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] | Mission, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,432
Land and Land Estates	2,556
Buildings and Improvements	2,911
Total	5,467
Accumulated Depreciation and Amortization	468
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	15,585
Total	18,385
Accumulated Depreciation and Amortization	10,399
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)	11 years
Office Building [Member] | Temple, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	7,865
Land and Land Estates	227
Buildings and Improvements	8,181
Total	8,408
Accumulated Depreciation and Amortization	1,022
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	23,382
Total	25,743
Accumulated Depreciation and Amortization	8,322
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	11,026
Total	13,359
Accumulated Depreciation and Amortization	4,161
Office Building [Member] | Hampton, Virginia [Member] | Minimum [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] | 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)	10 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)	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	8,517
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	12,853
Total	22,262
Accumulated Depreciation and Amortization	4,542
Useful life computing depreciation in latest income statement (years)	40 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	6,312
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] | Bremerton, Washington [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	5,854
Land and Land Estates	1,655
Buildings and Improvements	5,445
Total	7,100
Accumulated Depreciation and Amortization	642
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
Retail Site [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	185
Retail Site [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 Site [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 Site [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	947
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [Member] | Manteca, California [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	846
Land and Land Estates	2,082
Buildings and Improvements	6,464
Total	8,546
Accumulated Depreciation and Amortization	1,499
Retail Site [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 Site [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 Site [Member] | San Diego, California [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	539
Land and Land Estates	0
Buildings and Improvements	13,310
Total	13,310
Accumulated Depreciation and Amortization	2,623
Retail Site [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 Site [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 Site [Member] | Port Richey, Florida [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	0
Buildings and Improvements	0
Total	0
Accumulated Depreciation and Amortization	0
Retail Site [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	266
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [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	216
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [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	213
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [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	593
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [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	399
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [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	190
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [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	196
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [Member] | Galesburg, Illinois [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	475
Land and Land Estates	560
Buildings and Improvements	2,366
Total	2,926
Accumulated Depreciation and Amortization	640
Retail Site [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 Site [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 Site [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	356
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [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	204
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [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	287
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [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	56
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [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	553
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [Member] | Watertown, New York [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	795
Land and Land Estates	386
Buildings and Improvements	5,162
Total	5,548
Accumulated Depreciation and Amortization	1,265
Retail Site [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 Site [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 Site [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	1,159
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [Member] | Franklin, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	722
Buildings and Improvements	999
Total	1,721
Accumulated Depreciation and Amortization	100
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [Member] | Lorain, Ohio [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	1,197
Land and Land Estates	1,893
Buildings and Improvements	7,024
Total	8,917
Accumulated Depreciation and Amortization	1,630
Retail Site [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 Site [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 Site [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	392
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [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	313
Retail Site [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 Site [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 Site [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	2,302
Retail Site [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 Site [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 Site [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	94
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [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	160
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [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	89
Useful life computing depreciation in latest income statement (years)	40 years
Retail Site [Member] | Fairlea, West Virginia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	559
Land and Land Estates	501
Buildings and Improvements	1,985
Total	2,486
Accumulated Depreciation and Amortization	436
Retail Site [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 Site [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
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	101
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
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
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
Specialty [Member] | Tomball, Texas [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	8,759
Land and Land Estates	3,174
Buildings and Improvements	7,405
Total	10,579
Accumulated Depreciation and Amortization	655
Specialty [Member] | Tomball, Texas [Member] | Minimum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	13 years
Specialty [Member] | Tomball, Texas [Member] | Maximum [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	40 years
Specialty [Member] | Tomball, Texas [Member] | Asset Component 1 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life computing depreciation in latest income statement (years)	14 years
Land [Member] | New York, New York [Member] | New York, NY LTL Land, Acquired Oct-13 [Member] | Cross-collateralized [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	213,475
Land and Land Estates	73,148
Buildings and Improvements	0
Total	73,148
Accumulated Depreciation and Amortization	0
Land [Member] | New York, New York [Member] | New York, NY LTL Land, Acquired Oct-13, Property 2 [Member] | Cross-collateralized [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 [Member] | New York, New York [Member] | New York, NY LTL Land, Acquired Oct-13, Property 3 [Member] | Cross-collateralized [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 [Member] | New York, New York [Member] | New York, NY LTL Land, Acquired Oct-14 [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	22,000
Buildings and Improvements	0
Total	22,000
Accumulated Depreciation and Amortization	0
Land [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
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	3,157
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] | 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	2,246
Useful life computing depreciation in latest income statement (years)	7 years
Construction in Progress [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances	0
Land and Land Estates	0
Buildings and Improvements	0
Total	14,946
Accumulated Depreciation and Amortization	0