FAIR VALUE MEASUREMENTS (Details 4) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014		Sep. 30, 2014	Dec. 31, 2013
Financial assets:
Cash and cash equivalents	$ 77,755	$ 132,365		$ 91,075	$ 100,780
Investment securities available for sale	713,492	672,421	[1]
Investment securities held to maturity	39,292	39,620	[1]
Loans held for sale	37,962	20,205	[1]
Loans, net	2,970,779	2,890,449	[1]
Purchased accounts receivable	69,383	44,821	[1]
Federal Home Loan Bank stock	22,932	19,499	[1]
Derivative assets	844	2,368
Accrued interest receivable	12,502	12,071
Financial liabilities:
Deposits	3,247,769	3,247,364	[1]
Short-term borrowings	395,500	250,500	[1]
Long-term debt	129,859	180,164	[1]
Derivative liabilities	5,750	2,497
Accrued interest payable	1,903	2,688
Level 1
Financial assets:
Cash and cash equivalents, Fair Value	77,755	132,365
Investment securities available for sale	62,662	66,028
Investment securities held to maturity, Fair Value	0	0
Loans held for sale, Fair Value	0	0
Loans held for investment, Fair Value	0	0
Purchased accounts receivable	0	0
Federal Home Loan Bank stock, at cost	0	0
Derivative assets	0	0
Accrued interest receivable, Fair Value	0	0
Financial liabilities:
Deposits, Fair Value	0	0
Short term borrowings, Fair Value	0	0
Long-term debt, Fair Value	0	0
Derivative liabilities, Fair Value	0	0
Accrued interest payable, Fair Value	0	0
Level 2
Financial assets:
Cash and cash equivalents, Fair Value	0	0
Investment securities available for sale	634,252	595,103
Investment securities held to maturity, Fair Value	40,276	40,404
Loans held for sale, Fair Value	37,962	20,205
Loans held for investment, Fair Value	17,142	1,241
Purchased accounts receivable	69,383	44,821
Federal Home Loan Bank stock, at cost	22,932	19,499
Derivative assets	204	2,027
Accrued interest receivable, Fair Value	12,502	12,071
Financial liabilities:
Deposits, Fair Value	3,252,202	3,245,431
Short term borrowings, Fair Value	0	0
Long-term debt, Fair Value	0	0
Derivative liabilities, Fair Value	5,750	2,497
Accrued interest payable, Fair Value	1,903	2,688
Level 3
Financial assets:
Cash and cash equivalents, Fair Value	0	0
Investment securities available for sale	16,578	11,290
Investment securities held to maturity, Fair Value	0	0
Loans held for sale, Fair Value	0	0
Loans held for investment, Fair Value	2,996,342	2,918,332
Purchased accounts receivable	0	0
Federal Home Loan Bank stock, at cost	0	0
Derivative assets	640	341
Accrued interest receivable, Fair Value	0	0
Financial liabilities:
Deposits, Fair Value	0	0
Short term borrowings, Fair Value	395,500	250,500
Long-term debt, Fair Value	133,287	183,326
Derivative liabilities, Fair Value	0	0
Accrued interest payable, Fair Value	0	0
Estimate of Fair Value Measurement
Financial assets:
Cash and cash equivalents, Fair Value	77,755	132,365
Investment securities available for sale	713,492	672,421
Investment securities held to maturity, Fair Value	40,276	40,404
Loans held for sale, Fair Value	37,962	20,205
Loans held for investment, Fair Value	3,013,484	2,919,573
Purchased accounts receivable	69,383	44,821
Federal Home Loan Bank stock, at cost	22,932	19,499
Derivative assets	844	2,368
Accrued interest receivable, Fair Value	12,502	12,071
Financial liabilities:
Deposits, Fair Value	3,252,202	3,245,431
Short term borrowings, Fair Value	395,500	250,500
Long-term debt, Fair Value	133,287	183,326
Derivative liabilities, Fair Value	5,750	2,497
Accrued interest payable, Fair Value	$ 1,903	$ 2,688

[1] Derived from the audited consolidated financial statements included in the Company's 2014 Annual Report on Form 10-K.