LOANS (excluding covered loans) - Investment in Impaired Loans (Details) (Non Covered Loans, USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 74,204		$ 74,204		$ 75,897
Contractual Principal Balance	89,479		89,479		89,728
Related Allowance	8,366		8,366		9,528
Average Recorded Investment			75,563		78,426
Interest income recognized	245	253	788	833	1,125
Commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment	12,554		12,554		18,521
Contractual Principal Balance	15,980		15,980		21,521
Related Allowance	1,645		1,645		1,151
Average Recorded Investment			16,643		14,687
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	8		58		161
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	17		141		215
Interest income recognized	25		199		376
Real estate-construction
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,099		1,099		2,102
Contractual Principal Balance	1,671		1,671		2,840
Related Allowance	0		0		838
Average Recorded Investment			1,600		8,890
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0		7		81
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0		0		15
Interest income recognized	0		7		96
Real estate-commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment	43,706		43,706		39,796
Contractual Principal Balance	52,355		52,355		47,262
Related Allowance	6,371		6,371		7,155
Average Recorded Investment			41,078		41,053
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	50		89		235
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	108		317		277
Interest income recognized	158		406		512
Real estate - residential
Financing Receivable, Impaired [Line Items]
Recorded Investment	13,069		13,069		11,178
Contractual Principal Balance	14,948		14,948		12,820
Related Allowance	348		348		290
Average Recorded Investment			12,200		10,741
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	10		28		38
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	39		111		81
Interest income recognized	49		139		119
Installment
Financing Receivable, Impaired [Line Items]
Recorded Investment	489		489		452
Contractual Principal Balance	531		531		556
Related Allowance	0		0		0
Average Recorded Investment			418		452
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0		0		0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	1		4		2
Interest income recognized	1		4		2
Home equity
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,201		3,201		3,352
Contractual Principal Balance	3,908		3,908		4,233
Related Allowance	2		2		2
Average Recorded Investment			3,230		2,504
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	1		1		1
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	11		32		19
Interest income recognized	12		33		20
Other Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	86		86		496
Contractual Principal Balance	86		86		496
Related Allowance	0		0		92
Average Recorded Investment			394		99
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0		0		0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0		0		0
Interest income recognized	0		0		0
Impaired Financing Receivables With Related Allowance [Member] | Commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment	6,134		6,134		3,560
Contractual Principal Balance	7,500		7,500		4,252
Related Allowance	1,645		1,645		1,151
Average Recorded Investment			4,556		5,350
Impaired Financing Receivables With Related Allowance [Member] | Real estate-construction
Financing Receivable, Impaired [Line Items]
Recorded Investment	0		0		1,640
Contractual Principal Balance	0		0		2,168
Related Allowance	0		0		838
Average Recorded Investment			907		5,033
Impaired Financing Receivables With Related Allowance [Member] | Real estate-commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment	27,123		27,123		24,014
Contractual Principal Balance	31,628		31,628		25,684
Related Allowance	6,371		6,371		7,155
Average Recorded Investment			23,463		25,499
Impaired Financing Receivables With Related Allowance [Member] | Real estate - residential
Financing Receivable, Impaired [Line Items]
Recorded Investment	2,027		2,027		1,956
Contractual Principal Balance	2,082		2,082		2,003
Related Allowance	348		348		290
Average Recorded Investment			1,992		2,278
Impaired Financing Receivables With Related Allowance [Member] | Installment
Financing Receivable, Impaired [Line Items]
Recorded Investment	0		0		0
Contractual Principal Balance	0		0		0
Related Allowance	0		0		0
Average Recorded Investment			0		0
Impaired Financing Receivables With Related Allowance [Member] | Home equity
Financing Receivable, Impaired [Line Items]
Recorded Investment	101		101		101
Contractual Principal Balance	101		101		101
Related Allowance	2		2		2
Average Recorded Investment			101		81
Impaired Financing Receivables With Related Allowance [Member] | Other Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	0		0		170
Contractual Principal Balance	0		0		170
Related Allowance	0		0		92
Average Recorded Investment			209		34
Loans with no related allowance recorded [member] | Commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment	6,420		6,420		14,961
Contractual Principal Balance	8,480		8,480		17,269
Related Allowance	0		0		0
Average Recorded Investment			12,087		9,337
Loans with no related allowance recorded [member] | Real estate-construction
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,099		1,099		462
Contractual Principal Balance	1,671		1,671		672
Related Allowance	0		0		0
Average Recorded Investment			693		3,857
Loans with no related allowance recorded [member] | Real estate-commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment	16,583		16,583		15,782
Contractual Principal Balance	20,727		20,727		21,578
Related Allowance	0		0		0
Average Recorded Investment			17,615		15,554
Loans with no related allowance recorded [member] | Real estate - residential
Financing Receivable, Impaired [Line Items]
Recorded Investment	11,042		11,042		9,222
Contractual Principal Balance	12,866		12,866		10,817
Related Allowance	0		0		0
Average Recorded Investment			10,208		8,463
Loans with no related allowance recorded [member] | Installment
Financing Receivable, Impaired [Line Items]
Recorded Investment	489		489		452
Contractual Principal Balance	531		531		556
Related Allowance	0		0		0
Average Recorded Investment			418		452
Loans with no related allowance recorded [member] | Home equity
Financing Receivable, Impaired [Line Items]
Recorded Investment	3,100		3,100		3,251
Contractual Principal Balance	3,807		3,807		4,132
Related Allowance	0		0		0
Average Recorded Investment			3,129		2,423
Loans with no related allowance recorded [member] | Other Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	86		86		326
Contractual Principal Balance	86		86		326
Related Allowance	0		0		0
Average Recorded Investment			$ 185		$ 65