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LOANS (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Classifications of loans
Total loans	$ 2,582,349		$ 2,407,522
Net deferred loan costs and fees	3,918		3,252
Loans	2,586,267		2,410,774
Allowance for loan losses	(24,308)	$ (22,708)	(20,744)	$ (20,187)	$ (18,818)	$ (17,637)
Loans, net	2,561,959		2,390,030
Commercial real estate \| Mortgage loans
Classifications of loans
Total loans	1,012,675		999,474
Allowance for loan losses	(7,750)	(7,632)	(7,850)	(7,643)	(7,166)	(6,994)
Multi-family \| Mortgage loans
Classifications of loans
Total loans	517,119		350,793
Allowance for loan losses	(6,580)	(5,287)	(4,208)	(3,098)	(3,015)	(2,670)
Residential real estate \| Mortgage loans
Classifications of loans
Total loans	450,268		446,740
Allowance for loan losses	(2,741)	(2,753)	(2,115)	(2,004)	(1,989)	(2,208)
Commercial, industrial and agricultural loans
Classifications of loans
Total loans	508,578		501,766
Allowance for loan losses	(6,207)	(5,771)	(5,405)	(5,896)	(5,273)	(4,526)
Real estate construction and land loans
Classifications of loans
Total loans	78,211		91,153
Allowance for loan losses	(912)	(1,131)	(1,030)	(1,361)	(1,236)	(1,104)
Installment/consumer loans
Classifications of loans
Total loans	15,498		17,596
Allowance for loan losses	$ (118)	$ (134)	$ (136)	$ (185)	$ (139)	$ (135)