FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK (Details) - Mar. 31, 2016 $ in Thousands, CAD in Millions	USD ($)	CAD
Standby letters of credit
Schedule of Off-Balance Sheet Risks [Line Items]
Commitments to extend credit and other credit related financial instruments	$ 52,662
Open end consumer lines of credit
Schedule of Off-Balance Sheet Risks [Line Items]
Commitments to extend credit and other credit related financial instruments	2,994,399
Commercial lines of credit
Schedule of Off-Balance Sheet Risks [Line Items]
Commitments to extend credit and other credit related financial instruments	1,346,864
Unfunded loan commitments
Schedule of Off-Balance Sheet Risks [Line Items]
Commitments to extend credit and other credit related financial instruments	$ 392,534
Forward foreign exchange contracts | Canada, Dollars
Schedule of Off-Balance Sheet Risks [Line Items]
Notional amount of foreign currency derivative purchase contracts | CAD		CAD 16.8
Notional amount of foreign currency derivative sale contracts | CAD		CAD 5.7