Organization (Details) (Common Shares, Operating partnership)	Dec. 31, 2013
Common Shares \| Operating partnership
Organization
Percentage of ownership interests held by the entity	45.20%

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant