STOCK-BASED PLANS (Summary of Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	May 14, 2020
Stock-based plans
Common stock reserved for future issuance (in shares)					1,350,000
Stock Options
Stock options outstanding at the beginning of the period (in shares)			721,496
Granted (in shares)			2,000
Exercised (in shares)			(57,058)
Forfeited (in shares)			(125,500)
Expired (in shares)			(22,188)
Stock options outstanding at the end of the period (in shares)	518,750		518,750
Weighted-average Exercise Price
Stock options outstanding at the beginning of the period (in dollars per share)			$ 104.55
Granted (in dollars per share)			83.11
Exercised (in dollars per share)			67.24
Forfeited (in dollars per share)			124.24
Expired (in dollars per share)			100.08
Stock options outstanding at the end of the period (in dollars per share)	$ 104.01		$ 104.01
Stock based compensation expense			$ 3,346	$ 6,230
Stock Option
Weighted-average Exercise Price
Stock based compensation expense	$ 200	$ 800	(500)	1,500
Share based compensation costs capitalized	200	200		400
Restricted Stock
Weighted-average Exercise Price
Stock based compensation expense	1,800	2,400	3,700	4,700
Share based compensation costs capitalized	$ 700	$ 300	$ 700	$ 600