STOCK BASED COMPENSATION: (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock Units, Vested and Expected to Vest

			2019			2018
	Number		Weighted Average Grant Date	Number		Weighted Average Grant Date
(shares in thousands)	Outstanding		Fair Value	Outstanding		Fair Value
Nonvested balance at January 1,	16,999		45.92	18,019		41.14
Granted during the year	19,783		42.52	17,220		45.55
Vested during the year	(17,851	)	44.79	(18,240	)	40.85
Forfeited during the year	—		—	—		—
Nonvested balance at December 31,	18,931		43.44	16,999		45.92