INVESTMENT SECURITIES (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Investment securities available-for-sale [Abstract]
Amortized cost	$ 557,110,000		$ 557,110,000		$ 424,981,000
Unrealized gains	7,450,000		7,450,000		10,473,000
Unrealized losses	(3,001,000)		(3,001,000)		(374,000)
Estimated fair value	561,559,000		561,559,000		435,080,000
Proceeds from sales, calls and maturities of available-for-sale securities	20,244,000	$ 12,000,000	29,637,000	$ 32,044,000
Gross realized gains from sales/calls of available-for-sale securities	297,000	4,000	322,000	88,000
Gross realized losses from sales/calls of available-for-sale securities	488,000	$ 0	523,000	$ 46,000
U.S. Treasury Securities [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	74,057,000		74,057,000		37,910,000
Unrealized gains	696,000		696,000		982,000
Unrealized losses	(152,000)		(152,000)		(1,000)
Estimated fair value	74,601,000		74,601,000		38,891,000
Securities of U.S. Government Agencies and Corporations [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	95,718,000		95,718,000		105,506,000
Unrealized gains	562,000		562,000		1,317,000
Unrealized losses	(967,000)		(967,000)		(265,000)
Estimated fair value	95,313,000		95,313,000		106,558,000
Obligations of States and Political Subdivisions [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	35,693,000		35,693,000		31,013,000
Unrealized gains	1,585,000		1,585,000		1,878,000
Unrealized losses	(118,000)		(118,000)		(9,000)
Estimated fair value	37,160,000		37,160,000		32,882,000
Collateralized Mortgage Obligations [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	110,918,000		110,918,000		71,531,000
Unrealized gains	1,474,000		1,474,000		1,937,000
Unrealized losses	(308,000)		(308,000)		(8,000)
Estimated fair value	112,084,000		112,084,000		73,460,000
Mortgage-backed Securities [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	240,724,000		240,724,000		179,021,000
Unrealized gains	3,133,000		3,133,000		4,359,000
Unrealized losses	(1,456,000)		(1,456,000)		(91,000)
Estimated fair value	$ 242,401,000		$ 242,401,000		$ 183,289,000