Strategic Repositioning Initiatives (Details Textual) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jan. 16, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Strategic Repositioning Initiatives [Line Items]
Severance Costs		$ 62	$ 0	$ 570	$ 0
Proceeds from Sale of Land Held-for-use	$ 28,300
Proceeds from Divestiture of Interest in Joint Venture				1,900
Restricted Stock [Member]
Strategic Repositioning Initiatives [Line Items]
Severance Costs		$ 0		400
Accounts Payable and Accrued Liabilities [Member]
Strategic Repositioning Initiatives [Line Items]
Severance Costs				2,400
Severance Costs Year One				1,000
Severance Costs Year Two				$ 1,400
Grove at Stillwater, Oklahoma [Member]
Strategic Repositioning Initiatives [Line Items]
Percentage of interest in Joint Venture Sold				10.00%
Proceeds from Divestiture of Interest in Joint Venture				$ 1,000