LONG-TERM DEBT (Summary of Credit Agreement) (Details) - Revolving Credit Facility [Member]	12 Months Ended
	Dec. 31, 2018
Eurodollar [Member] | 25,000,000+ [Member]
Line of Credit Facility [Line Items]
Rate	1.00%
Eurodollar [Member] | 17,500,000 to 25,000,000 [Member]
Line of Credit Facility [Line Items]
Rate	1.25%
Eurodollar [Member] | 10,000,000 to 17,500,000 [Member]
Line of Credit Facility [Line Items]
Rate	1.50%
Eurodollar [Member] | 10,000,000 [Member]
Line of Credit Facility [Line Items]
Rate	1.75%
Domestic Rate [Member] | 25,000,000+ [Member]
Line of Credit Facility [Line Items]
Rate	(0.50%)
Domestic Rate [Member] | 17,500,000 to 25,000,000 [Member]
Line of Credit Facility [Line Items]
Rate	(0.50%)
Domestic Rate [Member] | 10,000,000 to 17,500,000 [Member]
Line of Credit Facility [Line Items]
Rate	(0.25%)
Domestic Rate [Member] | 10,000,000 [Member]
Line of Credit Facility [Line Items]
Rate	0.00%