SECURITIES - Amortized cost, fair value and tax equivalent yield of securities (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
U.S. Government agency notes - Within 1 year
Amortized cost	$ 22
Fair value	$ 22
Yield	3.79%
U.S. Government agency notes - After 1 year but within 5 years
Amortized cost	$ 359
Fair value	$ 358
Yield	3.60%
U.S. Government agency notes - After 5 years but within 10 years
Amortized cost	$ 4,390
Fair value	$ 4,552
Yield	3.36%
U.S. Government agency notes - Total
Amortized cost	$ 4,771
Fair value	$ 4,932
Yield	3.38%
Municipal bonds - Within 1 year
Amortized cost	$ 231
Fair value	$ 231
Yield	2.44%
Municipal bonds - After 10 years
Amortized cost	$ 19,974
Fair value	$ 20,392
Yield	3.66%
Municipal bonds - Total
Amortized cost	$ 20,205
Fair value	$ 20,623
Yield	3.65%
Mortgage-backed securities and Collateralized mortgage obligations - U.S. Government agencies
Amortized cost	$ 69,083
Fair value	$ 70,253
Yield	2.85%
Corporate bonds - After 5 years but within 10 years
Amortized cost	$ 4,250
Fair value	$ 4,341
Yield	5.43%
Fair value
Amortized cost	$ 98,309
Fair value	$ 100,149
Yield	3.03%