SECURITIES (Details 4) (Bank)	12 Months Ended
	Dec. 31, 2012 item	Dec. 31, 2011 item	Dec. 31, 2010 item
Minimum
Securities
Percentage of assets backed by a U.S. Government guarantee where the Bank had invested holdings that exceeded 10% of stockholder's equity	95.00%
Stockholder's equity | Investment holding concentration risk | Other than U.S. Government and its Sponsored Entities
Securities
Number of issuers where the Bank had invested holdings that exceeded 10% of stockholder's equity	1	0	1
Threshold for disclosure	10.00%	10.00%	10.00%
Investment holding percentage	13.00%	0.00%	14.00%