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Earnings Per Share (Details Textual) (CIBC World Markets Corp [Member], USD $)	6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012 Common Stock Class A Non Voting [Member]	Jun. 30, 2012 Common Stock Class A Non Voting [Member] Stock Compensation Plan [Member]	Jun. 30, 2012 Common Stock Class A Non Voting [Member] Stock Compensation Plan [Member]	Jun. 30, 2011 Common Stock Class A Non Voting [Member] Warrant [Member]	Jun. 30, 2011 Common Stock Class A Non Voting [Member] Warrant [Member]
Earnings Per Share (Textual) [Abstract]
Company issued a warrant to purchase share of Class A Stock		1,000,000
Class A Stock exercisable		$ 48.62
Period for exercise of warrant		5 years
Acquisition date of CIBC Worlds Market Corp	Jan. 14, 2008
Number of anti-dilutive share which is not included in computations of diluted profit			1,059,638	1,059,638	1,139,695	1,142,028

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The specified number of securities that each class of warrants or rights outstanding give the holder the right but not the obligation to purchase from the issuer at a specific price, on or before a certain date.

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