Schedule III - Real Estate and Accumulated Depreciation (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Real Estate and Accumulated Depreciation [Line Items]
Real estate aggregate cost for tax purposes	$ 886,859
Real Estate and Accumulated Depreciation, Amount of Encumbrances	491,206
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	127,097
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	661,233
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	(542)
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	8,668
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	126,555
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	669,901
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	796,456
real estate accumulated depreciation tax basis	139,398
Office Properties [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	252,539
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	74,581
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	321,023
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	(44)
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	13,977
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	74,537
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	335,000
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	409,537
Office Properties [Member] | Monument IV at Worldgate [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	35,195
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,186
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	57,013
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(1,260)
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,186
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	55,753
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	60,939
Office Properties [Member] | 111 Sutter Street [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	66,061
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	39,919
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	72,712
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	18
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	39,919
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	72,730
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	112,649
Office Properties [Member] | Railway Street Corporate Centre [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	29,614
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	6,022
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	35,441
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	(44)
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	1,213
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,978
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	36,654
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	42,632
Office Properties [Member] | 300 Old River Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	3,653
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,943
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	292
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,235
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,235
Office Properties [Member] | 500 West Thomas Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	18,114
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	25,789
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	2,359
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	28,148
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	28,148
Office Properties [Member] | 500 Old River Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	2,887
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,396
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	490
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	4,886
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,886
Office Properties [Member] | 1500 S. Central Ave [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	4,165
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,253
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	1,466
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,719
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,719
Office Properties [Member] | 14600 Sherman Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	5,198
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,348
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	1,244
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,592
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,592
Office Properties [Member] | 14624 Sherman Way [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	4,498
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,685
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	1,088
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,773
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,773
Office Properties [Member] | 18350 Roscoe Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	7,915
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	10,584
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	1,137
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,721
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	11,721
Office Properties [Member] | 18460 Roscoe Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	1,340
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	2,940
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	3
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	2,943
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	2,943
Office Properties [Member] | 18546 Roscoe Blvd [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	3,190
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,580
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	939
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,519
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	6,519
Office Properties [Member] | 36 Research Park Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	10,682
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,655
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	11,089
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(2)
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,655
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,087
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	13,742
Office Properties [Member] | 1501 N. Gilbert [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	4,358
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	4,750
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	773
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,523
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,523
Office Properties [Member] | 4545 East Chandler [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	4,993
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	5,345
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	473
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	5,818
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	5,818
Office Properties [Member] | 485 South Dobson [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	4,831
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,785
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	604
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	7,389
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	7,389
Office Properties [Member] | 4 Research Park Drive [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	6,419
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,830
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	6,743
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(2)
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,830
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	6,741
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,571
Office Properties [Member] | Canyon Plaza [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	29,001
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	14,959
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	32,909
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	1,120
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	14,959
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	34,029
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	48,988
Office Properties [Member] | 116 South Palisade [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	2,304
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,190
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	317
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,507
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,507
Office Properties [Member] | 525 East Plaza [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	4,469
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	7,511
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	1,369
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	8,880
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	8,880
Office Properties [Member] | 10440 East Riggs [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	3,652
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	0
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	3,017
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	336
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	0
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	3,353
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	3,353
Office Properties [Member] | Sherman Way Land [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,010
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	0
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,010
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	4,010
Retail Properties [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	57,008
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	15,442
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	72,883
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	1,752
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	15,442
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	74,635
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	90,077
Retail Properties [Member] | Stirling Slidell Shopping Centre [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	12,483
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	5,442
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	16,843
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	967
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	5,442
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	17,810
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	23,252
Retail Properties [Member] | The District at Howell Mill [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	44,525
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	10,000
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	56,040
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	785
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	10,000
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	56,825
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	66,825
Industrial Properties [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	4,790
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	44,233
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	(498)
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(3,834)
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	4,292
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	40,399
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	44,691
Industrial Properties [Member] | 105 Kendall Park Lane [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,656
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	12,836
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	(293)
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(1,185)
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,363
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	11,651
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	14,014
Industrial Properties [Member] | 4001 North Norfleet Road [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	0
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,134
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	31,397
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	(205)
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(2,649)
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,929
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	28,748
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	30,677
Apartment Properties [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	181,659
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	32,284
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	223,094
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(3,227)
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	32,284
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	219,867
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	252,151
Apartment Properties [Member] | Station Nine Apartments [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	36,885
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	9,690
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	43,400
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	868
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	9,690
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	44,268
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	53,958
Apartment Properties [Member] | Cabana Beach San Marcos [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	18,872
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,530
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	24,421
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(1,906)
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,530
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	22,515
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	25,045
Apartment Properties [Member] | Cabana Beach Gainesville [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	47,163
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	7,244
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	60,548
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(2,613)
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	7,244
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	57,935
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	65,179
Apartment Properties [Member] | Campus Lodge Columbia [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	15,694
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	2,079
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	20,838
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(1,075)
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	2,079
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	19,763
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	21,842
Apartment Properties [Member] | Campus Lodge Athens [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	13,180
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,754
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	17,311
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(156)
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,754
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	17,155
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	18,909
Apartment Properties [Member] | The Edge at Lafayette [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	16,812
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	1,782
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	23,266
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	524
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	1,782
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	23,790
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	25,572
Apartment Properties [Member] | Campus Lodge Tampa [Member]
Real Estate and Accumulated Depreciation [Line Items]
Real Estate and Accumulated Depreciation, Amount of Encumbrances	33,053
Real Estate and Accumulated Depreciation, Initial Cost [Abstract]
Real Estate and Accumulated Depreciation, Initial Cost of Land	7,205
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements	33,310
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Improvements [Abstract]
SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land	0
SEC Schedule III Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	1,131
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs	0
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements [Abstract]
Real Estate and Accumulated Depreciation, Carrying Amount of Land	7,205
Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements	34,441
Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements	$ 41,646