Commitments and Contingencies (Details Textual) CAD in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2015 USD ($)	Mar. 31, 2015 CAD	Mar. 31, 2014 USD ($)
Lease Obligations Expiration Year	2023	2023
Ground Leases Obligations	$ 0.4
Ground Leases Obligations Expiration Year	2081	2081
Guarantees Investment	$ 6.2
Capital Lease Obligations	1.3
Operating Leases, Rent Expense, Net	0.3		$ 0.2
Guarantees, Fair Value Disclosure	9.4
Accrued Liabilities and Other Liabilities	$ 5.5
HSRE I [Member]
Description For Guarantees One	up to 100% of $11.2 million of debt through May 2015	up to 100% of $11.2 million of debt through May 2015
Guarantees, Fair Value Disclosure	$ 3.2
HSRE IX [Member]
Description For Guarantees Three	up to 25% of $90.1 million of debt maturing in July 2016	up to 25% of $90.1 million of debt maturing in July 2016
CSH Montreal [Member]
Guarantees Underlying Debt	$ 41.1	CAD 52.0
Line of Credit Facility, Average Outstanding Amount	$ 82.1	CAD 104.0
HSRE V and HSRE VI and HSRE X [Member]
Description For Guarantees Two	up to 50% of $132.6 million of debt with varying maturity dates from May 2015 through September 2018	up to 50% of $132.6 million of debt with varying maturity dates from May 2015 through September 2018