Investments in Real Estate and Real Estate Under Construction (Details) (USD $)					3 Months Ended			3 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2012 Payment Guarantee [Member]	Mar. 31, 2012 Corporate Joint Venture [Member]	Mar. 31, 2012 Lender Subsidiary [Member] sqft	Mar. 31, 2012 Office Property [Member] Huntington West Virginia [Member]	Mar. 31, 2012 Office Property [Member] Florence South Carolina [Member]	Mar. 31, 2012 Office Property [Member] Saint Joseph Missouri [Member] Lender Subsidiary [Member] years sqft		Mar. 31, 2012 Office Property [Member] Jessup Pennsylvania [Member] sqft years	Mar. 31, 2012 Office Property [Member] Eugene Oregon [Member] years sqft	Mar. 31, 2012 Office Property [Member] Denver Colorado [Member] sqft years	Mar. 31, 2012 Industrial Property [Member] Shreveport Louisiana [Member] Lender Subsidiary [Member] years sqft		Mar. 31, 2012 Industrial Property [Member] Long Island City New York [Member] Corporate Joint Venture [Member] years sqft		Mar. 31, 2012 Retail Property [Member] Valdosta Georgia [Member] sqft years
Investments in Real Estate and Real Estate Under Construction [Line Items]
Initial Cost Basis	$ 17,652,000					$ 12,558,000	$ 5,094,000
Land	2,142,000					1,368,000	774,000
Building and Improvements	13,156,000					9,527,000	3,629,000
Lease in-place Value	1,910,000					1,405,000	505,000
Tenant Relationships Value	444,000					258,000	186,000
Square Feet					944,000			99,000	[1]	150,000	80,000	163,000	257,000	[1]	143,000	[2]	52,000
Expected Maximum Commitment/Contribution					152,000,000			18,000,000	[1]	20,800,000	17,600,000	37,600,000	2,500,000	[1]	46,700,000	[2]	8,800,000
Estimated Property Purchase Price/Completion Cost					171,400,000			18,000,000	[1]	20,800,000	17,600,000	37,600,000	13,100,000	[1]	55,500,000	[2]	8,800,000
Lease Term (Years)								15	[1]	15	15	15	10	[1]	15	[2]	15
Guarantor Obligations, Current Carrying Value			1,500,000
Maximum Loan to Joint Venture				4,398,000
Development in Process	$ 40,311,000	$ 34,529,000

[1] Acquisition, development and construction arrangement.

[2] Joint venture investment. The Company has guaranteed completion to the ground owner. The guarantee obligation was valued at $1,500 and is included in accounts payable and other liabilities in the unaudited condensed consolidated balance sheet. In addition, the Company may loan a maximum of $4,398 to the joint venture under certain circumstances. The difference between the Company's expected contribution and the estimated completion cost represents the joint venture partner's equity.