COMMON STOCK REPURCHASES (Details) - USD ($) shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jul. 29, 2013
Class of Stock [Line Items]
Payments for repurchase of common stock	$ 0	$ 9,530,000	$ 7,917,000
Common Stock
Class of Stock [Line Items]
Authorized amount				$ 100,000,000
Payments for repurchase of common stock		$ 9,500,000
Shares repurchased and retired, shares		1.3