LOANS (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans And Leases Receivable Gross Carrying Amount Non Covered Loans	$ 1,130,000	$ 643,100,000	$ 771,600,000
Covered Loans Acquired	130,300,000	245,700,000	137,500,000
Modified loans	36,800,000	32,000,000
Troubled debt restructurings, previous charge-offs	1,200,000	1,600,000	1,300,000
Allowance for loan losses allocated to troubled debt restructurings	2,700,000	1,600,000	2,700,000
Purchased Loan Pools	656,734,000	0	592,963,000
Mortgage Loans on Real Estate, Face Amount of Mortgages	644,300,000		580,700,000
Purchase Premium Paid At Acquisition	12,400,000		12,300,000
Residential mortgages on properties principal balances	644,300,000		580,700,000
Allowance for Loan and Lease Losses, Loans Acquired	1,300,000		581,000
Purchased Non Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	19,187,000	17,308,000	13,330,000
Modified loans	25,015,000	24,590,000	22,264,000
Troubled debt restructurings, previous charge-offs	377,000		377,000
Troubled debt restructuring loans	9,193,000	1,526,000	9,373,000
Troubled debt restructurings, provision for loan loss expense	12,000	329,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	494,000	5,000
Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	13,331,000	38,359,000	13,238,000
Modified loans	12,873,000	31,201,000	13,821,000
Troubled debt restructurings, previous charge-offs	1,200,000	1,100,000	1,200,000
Troubled debt restructuring loans	15,700,000	23,300,000	15,500,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,100,000		2,100,000
Loans Excluding Purchased Non Covered And Covered Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	15,700,000	20,841,000	16,860,000
Modified loans	26,271,000	38,964,000	26,268,000
Troubled debt restructurings principal balances	1,700,000	2,700,000
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	793,000	1,500,000
Troubled debt restructuring loans	14,385,000	$ 12,935,000	$ 14,418,000
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	$ 100,000
Loan To Value Ratio	110.00%
Past due loan accrued	30 days
Minimum [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual loans	$ 125,000
Minimum [Member] | Independent Third Party Loan Review [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of Loan Relationship With Risk Ratings Reviewed Annually	250,000
Minimum [Member] | Internal Loan Review Department [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of Loan Relationship With Risk Ratings Reviewed Annually	$ 1,000,000