Commitments and Contingencies (Details Textual) CAD in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2015 CAD	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Lease Obligations Expiration Year			2023	2023
Ground Leases Obligations	$ 0.4		$ 0.4
Ground Leases Obligations Expiration Year			2081	2081
Guarantees Investment			$ 6.2
Capital Lease Obligations	1.2		1.2
Operating Leases, Rent Expense, Net	0.3	$ 0.2	0.6		$ 0.4
Guarantees, Fair Value Disclosure	9.4		9.4
Accrued Liabilities and Other Liabilities	5.5		$ 5.5			$ 5.5
HSRE I [Member]
Description For Guarantees One			up to 100% of $11.2 million of debt through September 2015	up to 100% of $11.2 million of debt through September 2015
Held In Escrow Amount			$ 3.0
Guarantees, Fair Value Disclosure	$ 3.2		3.2
CSH Montreal [Member]
Guarantees Underlying Debt			43.9	CAD 54.3
Line of Credit Facility, Average Outstanding Amount			$ 87.8	CAD 108.6
HSRE V and HSRE VI and HSRE X [Member]
Description For Guarantees Two			up to 25% of $80.5 million of debt maturing from September 2015 through September 2018	up to 25% of $80.5 million of debt maturing from September 2015 through September 2018
HSRE V and HSRE VI [Member]
Description For Guarantees Two			up to 50% of $139.5 million of debt with varying maturity dates from July 2015 through January 2016	up to 50% of $139.5 million of debt with varying maturity dates from July 2015 through January 2016