INVESTMENT SECURITIES HELD-TO-MATURITY AND AVAILABLE-FOR-SALE (1) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Period end component of accumulated other comprehensive loss (net of tax)	$ 348	$ 510
Registered Mutual Funds Available For Sale [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Cumulative balance at the beginning of the period	1,425	1,425	3,063
Reduction of OTTI for securities sold durimg	(1,077)	0	(1,302)
Reduction of OTTI for securities transferred into trading	0	0	(336)
Cumulative balance at end of the period	348	1,425	1,425
Held-to-maturity Securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Cumulative balance at the beginning of the period	9,904	10,450	10,197
OTTI recognized during the period	187	752	2,757
Reductions and transfers to credit-related OTTI	(181)	(1,271)	(2,369)
Amortization of previously recognized OTTI	(331)	(27)	(135)
Cumulative balance at end of the period	9,579	9,904	10,450
Held-to-maturity Securities [Member] | Credit Related OTTI Recognized in Earning [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Cumulative balance at the beginning of the period	8,974	8,247	5,772
OTTI recognized during the period	181	727	2,475
Reductions and transfers to credit-related OTTI	0	0	0
Amortization of previously recognized OTTI	(210)	0	0
Cumulative balance at end of the period	8,945	8,974	8,247
Held-to-maturity Securities [Member] | Non-Credit OTTI Recognized in Accumulated Other Comprehensive Loss [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Cumulative balance at the beginning of the period	930	2,203	4,425
OTTI recognized during the period	6	25	282
Reductions and transfers to credit-related OTTI	(181)	(1,271)	(2,369)
Amortization of previously recognized OTTI	(121)	(27)	(135)
Cumulative balance at end of the period	634	930	2,203
Transfers [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Cumulative balance at the beginning of the period	1,470	1,916
Loss upon transfer	0	0
Amortization of Tranfer Loss	(202)	(446)
Transfer to credit or non-credit OTTI	0	0
Cumulative balance at end of the period	$ 1,268	$ 1,470