CAPITAL STOCK (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Schedule of Activity Related to Common Stock Outstanding

The activity related to outstanding common stock and common stock held in treasury was as follows:

	December 31,
	2018	2017	2016
Common Stock:	Quantity (in thousands)
Balance, beginning of period	17,316	17,197	14,390
Issuance of shares for compensation net of withholding	85	119	84
Issuance of common stock related to equity distribution agreements	—	—	2,723
Balance, end of period	17,401	17,316	17,197