Mortgage Notes Receivable (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) loan	Mar. 31, 2015 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of mortgage notes receivable	9
Weighted-average interest rate	6.30%
Weighted-average years to maturity	13 years 8 months 12 days
Principal repayments received from borrowers | $	$ 3,863	$ 3,668
Mortgage notes receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of mortgage notes receivable	9
Number of mortgage notes receivable repaid at maturity	1
Principal repayments received from borrowers | $	$ 400
Number of mortgage notes with capitalized principal and interest	1