SUMMARY OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES (Details 4)	12 Months Ended
	Dec. 31, 2011 trust
Long-Term Debt
Number of statutory business trusts	9
Number of statutory business trusts dissolved	2
Recent accounting standards
Minimum percentage of likelihood to determine that it is more likely than not	50.00%
Minimum
Information on Federal funds purchased
Federal funds maturity period (in days/months)	1
Maximum
Information on Federal funds purchased
Federal funds maturity period (in days/months)	6