FAIR VALUE MEASURES (Details 4) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Financial assets:
Cash and due from banks	$ 116,255	$ 118,518	$ 115,413
Federal funds sold and interest-bearing accounts	68,273	272,045	239,804
FDIC loss-share receivable	0	6,301	14,957	$ 31,351
Financial liabilities:
Subordinated deferrable interest debentures	83,570	69,874	69,325
FDIC loss-share payable	1,897	0	0
Other borrowings	260,191	39,000	39,000
Carrying Value [Member]
Financial assets:
Cash and due from banks	116,255	118,518	115,413
Federal funds sold and interest-bearing accounts	68,273	272,045	239,804
Loans, net	4,677,580	3,971,974	3,407,609
FDIC loss-share receivable		6,301	14,957
Accrued interest receivable	19,734	21,274	17,648
Financial liabilities:
Subordinated deferrable interest debentures	83,570	69,874	69,325
Deposits	5,179,532	4,879,290	4,511,547
Securities sold under agreements to repurchase	37,139	63,585	75,066
FDIC loss-share payable	1,897
Other borrowings	260,191	39,000	39,000
Accrued interest payable	1,129	1,054	1,239
Fair Value [Member]
Financial assets:
Cash and due from banks	116,255	118,518	115,413
Federal funds sold and interest-bearing accounts	68,273	272,045	239,804
Loans, net	4,674,993	3,982,606	3,428,008
FDIC loss-share receivable		(944)	5,295
Accrued interest receivable	19,734	21,274	17,648
Financial liabilities:
Subordinated deferrable interest debentures	67,484	52,785	50,924
Deposits	5,180,700	4,880,294	4,513,218
Securities sold under agreements to repurchase	37,139	63,585	75,066
FDIC loss-share payable	6,944
Other borrowings	260,191	39,000	39,000
Accrued interest payable	1,129	1,054	1,239
Fair Value [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and due from banks	116,255	118,518	115,413
Federal funds sold and interest-bearing accounts	68,273	272,045	239,804
Loans, net	0	0	0
FDIC loss-share receivable		0	0
Accrued interest receivable	19,734	21,274	17,648
Financial liabilities:
Subordinated deferrable interest debentures	0	0	0
Deposits	0	0	0
Securities sold under agreements to repurchase	37,139	63,585	75,066
FDIC loss-share payable	0
Other borrowings	0	0	0
Accrued interest payable	1,129	1,054	1,239
Fair Value [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets:
Cash and due from banks	0	0	0
Federal funds sold and interest-bearing accounts	0	0	0
Loans, net	0	0	0
FDIC loss-share receivable		0	0
Accrued interest receivable	0	0	0
Financial liabilities:
Subordinated deferrable interest debentures	67,484	52,785	50,924
Deposits	5,180,700	4,880,294	4,513,218
Securities sold under agreements to repurchase	0	0	0
FDIC loss-share payable	0
Other borrowings	260,191	39,000	39,000
Accrued interest payable	0	0	0
Fair Value [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets:
Cash and due from banks	0	0	0
Federal funds sold and interest-bearing accounts	0	0	0
Loans, net	4,674,993	3,982,606	3,428,008
FDIC loss-share receivable		(944)	5,295
Accrued interest receivable	0	0	0
Financial liabilities:
Subordinated deferrable interest debentures	0	0	0
Deposits	0	0	0
Securities sold under agreements to repurchase	0	0	0
FDIC loss-share payable	6,944
Other borrowings	0	0	0
Accrued interest payable	$ 0	$ 0	$ 0