LOANS AND LEASES - Investment in Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Current balance	$ 55,939		$ 55,939		$ 64,397
Contractual Principal Balance	67,197		67,197		76,291
Related Allowance	1,653		1,653		5,053
Average current balance			61,171		56,572
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	189		616		706
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	70		190		287
Interest income recognized	259	$ 296	806	$ 684	993
Commercial
Financing Receivable, Impaired [Line Items]
Current balance	10,849		10,849		10,009
Contractual Principal Balance	12,716		12,716		11,889
Related Allowance	478		478		739
Average current balance			10,494		11,380
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	47		153		146
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	6		16		57
Interest income recognized	53		169		203
Real estate - construction
Financing Receivable, Impaired [Line Items]
Current balance	79		79		223
Contractual Principal Balance	383		383		443
Related Allowance	0		0		0
Average current balance			187		223
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0		0		0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0		0		0
Interest income recognized	0		0		0
Real estate - commercial
Financing Receivable, Impaired [Line Items]
Current balance	29,838		29,838		35,724
Contractual Principal Balance	35,677		35,677		41,293
Related Allowance	938		938		4,002
Average current balance			34,201		27,124
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	77		263		285
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	54		145		187
Interest income recognized	131		408		472
Real estate - residential
Financing Receivable, Impaired [Line Items]
Current balance	9,010		9,010		11,580
Contractual Principal Balance	10,357		10,357		12,947
Related Allowance	235		235		310
Average current balance			10,051		11,573
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	44		136		182
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	9		27		40
Interest income recognized	53		163		222
Installment
Financing Receivable, Impaired [Line Items]
Current balance	427		427		514
Contractual Principal Balance	460		460		577
Related Allowance	0		0		0
Average current balance			412		513
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	2		6		8
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0		0		0
Interest income recognized	2		6		8
Home equity
Financing Receivable, Impaired [Line Items]
Current balance	5,736		5,736		6,347
Contractual Principal Balance	7,604		7,604		9,142
Related Allowance	2		2		2
Average current balance			5,826		5,759
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	19		58		85
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	1		2		3
Interest income recognized	20		60		88
Other
Financing Receivable, Impaired [Line Items]
Current balance	0		0		0
Contractual Principal Balance	0		0		0
Related Allowance	0		0		0
Average current balance			0		0
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	0		0		0
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	0		0		0
Interest income recognized	0		0		0
Loans with no related allowance recorded [member]
Financing Receivable, Impaired [Line Items]
Current balance	44,408		44,408		43,440
Contractual Principal Balance	55,025		55,025		53,843
Related Allowance	0		0		0
Average current balance			43,751		38,678
Loans with no related allowance recorded [member] | Commercial
Financing Receivable, Impaired [Line Items]
Current balance	9,981		9,981		7,611
Contractual Principal Balance	11,848		11,848		9,284
Related Allowance	0		0		0
Average current balance			8,981		7,146
Loans with no related allowance recorded [member] | Real estate - construction
Financing Receivable, Impaired [Line Items]
Current balance	79		79		223
Contractual Principal Balance	383		383		443
Related Allowance	0		0		0
Average current balance			187		223
Loans with no related allowance recorded [member] | Real estate - commercial
Financing Receivable, Impaired [Line Items]
Current balance	20,834		20,834		19,285
Contractual Principal Balance	26,044		26,044		23,631
Related Allowance	0		0		0
Average current balance			20,129		15,653
Loans with no related allowance recorded [member] | Real estate - residential
Financing Receivable, Impaired [Line Items]
Current balance	7,452		7,452		9,561
Contractual Principal Balance	8,787		8,787		10,867
Related Allowance	0		0		0
Average current balance			8,317		9,485
Loans with no related allowance recorded [member] | Installment
Financing Receivable, Impaired [Line Items]
Current balance	427		427		514
Contractual Principal Balance	460		460		577
Related Allowance	0		0		0
Average current balance			412		513
Loans with no related allowance recorded [member] | Home equity
Financing Receivable, Impaired [Line Items]
Current balance	5,635		5,635		6,246
Contractual Principal Balance	7,503		7,503		9,041
Related Allowance	0		0		0
Average current balance			5,725		5,658
Loans with no related allowance recorded [member] | Other
Financing Receivable, Impaired [Line Items]
Current balance	0		0		0
Contractual Principal Balance	0		0		0
Related Allowance	0		0		0
Average current balance			0		0
Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Current balance	11,531		11,531		20,957
Contractual Principal Balance	12,172		12,172		22,448
Related Allowance	1,653		1,653		5,053
Average current balance			17,420		17,894
Impaired Financing Receivables With Related Allowance [Member] | Commercial
Financing Receivable, Impaired [Line Items]
Current balance	868		868		2,398
Contractual Principal Balance	868		868		2,605
Related Allowance	478		478		739
Average current balance			1,513		4,234
Impaired Financing Receivables With Related Allowance [Member] | Real estate - construction
Financing Receivable, Impaired [Line Items]
Current balance	0		0		0
Contractual Principal Balance	0		0		0
Related Allowance	0		0		0
Average current balance			0		0
Impaired Financing Receivables With Related Allowance [Member] | Real estate - commercial
Financing Receivable, Impaired [Line Items]
Current balance	9,004		9,004		16,439
Contractual Principal Balance	9,633		9,633		17,662
Related Allowance	938		938		4,002
Average current balance			14,072		11,471
Impaired Financing Receivables With Related Allowance [Member] | Real estate - residential
Financing Receivable, Impaired [Line Items]
Current balance	1,558		1,558		2,019
Contractual Principal Balance	1,570		1,570		2,080
Related Allowance	235		235		310
Average current balance			1,734		2,088
Impaired Financing Receivables With Related Allowance [Member] | Installment
Financing Receivable, Impaired [Line Items]
Current balance	0		0		0
Contractual Principal Balance	0		0		0
Related Allowance	0		0		0
Average current balance			0		0
Impaired Financing Receivables With Related Allowance [Member] | Home equity
Financing Receivable, Impaired [Line Items]
Current balance	101		101		101
Contractual Principal Balance	101		101		101
Related Allowance	2		2		2
Average current balance			101		101
Impaired Financing Receivables With Related Allowance [Member] | Other
Financing Receivable, Impaired [Line Items]
Current balance	0		0		0
Contractual Principal Balance	0		0		0
Related Allowance	$ 0		0		0
Average current balance			$ 0		$ 0