COMMON STOCK Treasury Shares (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Shares Held in Employee Trust, Shares	21,401	18,366
Treasury Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Treasury Stock, Shares, Acquired	107,357	116,085
Treasury stock acquired and reissued	83,228	114,697
Treasury stock acquired, and available for reissuance	34,526	10,397