Subsequent Events (Details Textual) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2013
Stock Appreciation Rights (SARs) [Member]
Potential Cash Settlement	$ 22,180
Subsequent Event [Member]
Potential Cash Settlement	64,331
Incentive Fee, Description	the Company recorded a one time incentive charge of C$10,000 ($9,600) relating to the contractual achievement of the Company’s Class A share price averaging C$30 for 20 consecutive days.
Subsequent Event [Member] \| Stock Appreciation Rights (SARs) [Member]
Potential Cash Settlement	$ 42,151

Description of the nature of the payments to managing member or general partner for incentive rights held including the fee rate, basis of calculation, relevant accounting period, whether the fee is paid to an entity other than the managing member or general partner, or if the fee is waived.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Name:	us-gaap_IncentiveFeeDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration