COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
COMMITMENTS AND CONTINGENCIES.
Financial instruments whose contract amounts represent credit risk	$ 6,770	$ 5,950
Expiration term of contingent obligations, months	12 months
Balances at the Federal Reserve Bank	$ 26,620	$ 32,720