LOANS AND ALLOWANCE FOR LOAN LOSSES (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Covered Loans Acquired	$ 58,200,000	$ 137,500,000
Troubled debt restructurings, previous charge-offs	1,200,000	1,300,000
Allowance for loan losses allocated to troubled debt restructurings	3,100,000	2,700,000
Troubled debt restructurings, provision for loan loss expense		751,000	$ 843,000
Allowance for loan losses adjustments	176,000	1,400,000
Purchased Loan Pools	568,314,000	592,963,000
Mortgage Loans on Real Estate, Face Amount of Mortgages	559,400,000	580,700,000
Purchase Premium Paid At Acquisition	8,900,000	12,300,000
Residential mortgages on properties principal balances	559,400,000	580,700,000
Allowance for Loan and Lease Losses, Loans Acquired	1,800,000	581,000
Allowance for Loan and Lease Loss, Recovery of Bad Debts	657,000	237,000
Troubled Debt Restructurings Excluding Purchased Non-covered And Covered Loans	19,100,000	16,400,000
Loans and Leases Receivable, Allowance	23,920,000	21,062,000
Modified Loans Value	69,400,000	96,500,000
Loans and Leases Receivable, Net Reported Amount, Reclassified From Covered Loans To Non-Covered Loans	45,900,000	50,600,000
Loans and Leases Receivable, Net Amount	353,900,000
Purchased Non Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	18,420,000	13,330,000	18,249,000
Troubled debt restructuring loans	11,004,000	9,373,000	1,212,000
Troubled debt restructurings, provision for loan loss expense	88,000	883,000
Loans and Leases Receivable, Allowance	1,011,031,000	771,554,000
Modified Loans Value	20,254,000	22,264,000
Non Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled debt restructurings, provision for loan loss expense	957,000		84,000
Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	4,546,000	13,238,000
Troubled debt restructurings, previous charge-offs	791,000	1,200,000
Troubled debt restructurings principal balances		1,300,000
Troubled debt restructuring loans	1,417,000	2,187,000	15,500,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	907,000
Modified Loans Value	4,806,000	13,821,000
Loans Excluding Purchased Non Covered And Covered Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	18,114,000	16,860,000	21,728,000
Troubled debt restructurings principal balances	4,500,000	2,700,000
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	3,500,000	2,200,000
Troubled debt restructuring loans	14,209,000	14,418,000	12,759,000
Modified Loans Value	32,893,000	26,268,000
Purchased Non Covered Loans 1 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	13,600,000	10,000,000
Troubled debt restructurings, previous charge-offs	752,000	377,000
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	4,500,000	7,300,000
Purchased Loan Pools	925,000,000
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	$ 100,000
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan To Value Ratio	110.00%
Minimum [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	$ 100,000	200,000	200,000
Troubled debt restructuring loans	$ 100,000	$ 100,000	$ 100,000