FAIR VALUES OF FINANCIAL INSTRUMENTS: (Details 2) $ in Thousands	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Measurement Input, Discount Rate | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of Inputs (percent)	0
Measurement Input, Discount Rate | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of Inputs (percent)	0.50
State and municipal obligations | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 1,895	$ 1,895
State and municipal obligations | Measurement Input, Discount Rate | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of Inputs (percent)	0.0341	0.0341
State and municipal obligations | Measurement Input, Discount Rate | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of Inputs (percent)	0.0444	0.0444
Collateralized debt obligations | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 3,359	$ 3,136
Collateralized debt obligations | Measurement Input, Discount Rate
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of Inputs (percent)	0.0183
State And Municipal Obligations | Measurement Input, Discount Rate
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of Inputs (percent)		0.0193
Other Real Estate | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 108	$ 1,000
Impaired Loans | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 12,839	$ 6,581
Impaired Loans | Measurement Input, Discount Rate | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of Inputs (percent)	0.0000	0.0000
Impaired Loans | Measurement Input, Discount Rate | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of Inputs (percent)	0.5000	0.5000
Other securities | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 1,743
Other securities | Measurement Input, Discount Rate | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of Inputs (percent)	0.0065
Other securities | Measurement Input, Discount Rate | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range of Inputs (percent)	0.0140