FAIR VALUE MEASUREMENTS (Details 4) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015		Jun. 30, 2015	Dec. 31, 2014
Financial assets:
Cash and cash equivalents	$ 120,536	$ 111,918		$ 122,961	$ 132,365
Investment securities	1,038,307	689,132	[1]
Investment securities held to maturity	38,959	39,182	[1]
Loans held for sale	139,513	47,287	[1]
Loans, net	5,257,135	3,066,775	[1]
Purchased accounts receivable	9,657	52,688	[1]
Federal Home Loan Bank stock	45,284	24,844	[1]
Derivative assets	2,512	996
Accrued interest receivable	19,590	12,695
Financial liabilities:
Deposits	5,338,586	3,310,297	[1]
Short-term borrowings	811,383	375,500	[1]
Long-term debt	229,012	194,967	[1]
Derivative liabilities	11,942	4,376
Accrued interest payable	2,985	2,550
Level 1
Financial assets:
Cash and cash equivalents, Fair Value	120,536	111,918
Investment securities	33,318	16,532
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	993,264	665,872
Investment securities held to maturity, fair value	41,197	40,500
Loans held for sale, Fair Value	139,513	47,287
Loans held for investment, Fair Value	39,077	23,664
Purchased accounts receivable	9,657	52,688
Federal Home Loan Bank stock, at cost	45,284	24,844
Derivative assets	905	588
Accrued interest receivable, Fair Value	19,590	12,695
Financial liabilities:
Deposits, Fair Value	5,345,875	3,310,306
Short term borrowings, Fair Value	0	0
Long-term debt, Fair Value	0	0
Derivative liabilities, Fair Value	11,942	4,376
Accrued interest payable, Fair Value	2,985	2,550
Level 3
Financial assets:
Cash and cash equivalents, Fair Value	0	0
Investment securities	11,725	6,728
Investment securities held to maturity, fair value	0	0
Loans held for sale, Fair Value	0	0
Loans held for investment, Fair Value	5,295,117	3,068,797
Purchased accounts receivable	0	0
Federal Home Loan Bank stock, at cost	0	0
Derivative assets	1,607	408
Accrued interest receivable, Fair Value	0	0
Financial liabilities:
Deposits, Fair Value	0	0
Short term borrowings, Fair Value	811,383	375,500
Long-term debt, Fair Value	239,072	198,928
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	120,536	111,918
Investment securities	1,038,307	689,132
Investment securities held to maturity, fair value	41,197	40,500
Loans held for sale, Fair Value	139,513	47,287
Loans held for investment, Fair Value	5,334,194	3,092,461
Purchased accounts receivable	9,657	52,688
Federal Home Loan Bank stock, at cost	45,284	24,844
Derivative assets	2,512	996
Accrued interest receivable, Fair Value	19,590	12,695
Financial liabilities:
Deposits, Fair Value	5,345,875	3,310,306
Short term borrowings, Fair Value	811,383	375,500
Long-term debt, Fair Value	239,072	198,928
Derivative liabilities, Fair Value	11,942	4,376
Accrued interest payable, Fair Value	$ 2,985	$ 2,550

[1] Derived from the audited consolidated financial statements included in the Company's 2015 Annual Report on Form 10-K.