SHAREHOLDERS' EQUITY (Narrative) (Details) - USD ($)		3 Months Ended	12 Months Ended
	May 22, 2020	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Jun. 01, 2020
Stockholders' Equity Note [Abstract]
Net income (loss)			$ (8,619,000)	$ 4,067,000
Dividends paid			(607,000)	(531,000)
Other comprehensive income, net of tax			1,142,000	4,013,000
Common stock issued			25,000	53,000
Treasury stock acquired			$ 36,000	$ 7,000
Shares of common stock repurchased and placed in treasury (in shares)		436	2,509
Maximum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Stock repurchase program, authorized amount					$ 500,000
Directors
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Shares issued under incentive plan (in shares)	1,763