COMMON STOCK REPURCHASES AND CASH DIVIDENDS Common Stock Repurchases (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jul. 25, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Payments for Repurchase of Common Stock	$ 6,734	$ 6,435
Common Stock [Member]
Class of Stock [Line Items]
Payments for Repurchase of Common Stock	6,734
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 46,800			$ 23,600
Stock Repurchase Program, Authorized Amount			$ 30,000
Stock Repurchased and Retired During Period, Shares	96,000