REAL ESTATE HELD FOR INVESTMENT (Highes Tenant Industry Concentrations- Grater than 10% of Annual Base Rent) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Tenants
Concentration Risk [Line Items]
Number of Tenants	400
Annualized Base Rent	$ 19,775	[1]
Percentage of Annualized Base Rent	32.10%
Industry - Finance and Insurance [Member]
Concentration Risk [Line Items]
Number of Tenants	23
Annualized Base Rent	6,803	[1]
Percentage of Annualized Base Rent	11.10%
Industry - Professional, Scientific and Legal [Member]
Concentration Risk [Line Items]
Number of Tenants	47
Annualized Base Rent	6,672	[1]
Percentage of Annualized Base Rent	10.80%
Industry - Finance [Member]
Concentration Risk [Line Items]
Number of Tenants	30
Annualized Base Rent	$ 6,300	[1]
Percentage of Annualized Base Rent	10.20%

[1] Annualized base rent represents annualized contractual base rental income as of December 31, 2013, adjusted to straight-line any contractual tenant concessions (including free rent), rent increases and rent decreases from the lease’s inception through the balance of the lease term.