Commitments and Contingencies (Purchase Commitments) (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) property real_estate_investment_trust agreement	Dec. 31, 2015 USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]
Escrow deposits	$ 3,123	$ 1,190
Purchase Commitment [Member] | Private Capital Management Segment [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of Managed REITs to be assigned | real_estate_investment_trust	1
Number of purchase and sale agreements | agreement	9
Percentage of voting interests acquired	100.00%
Number of properties acquired | property	13
Aggregate purchase price	$ 290,000
Escrow deposits	$ 3,100