STOCK BASED COMPENSATION: (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

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

		2020		2019
	Number	Weighted Average Grant Date	Number	Weighted Average Grant Date
(shares in thousands)	Outstanding	Fair Value	Outstanding	Fair Value
Nonvested balance at January 1,	18,931	43.44	16,999	45.92
Granted during the year	19,688	42.50	19,783	42.52
Vested during the year	(18,895)	43.43	(17,851)	44.79
Forfeited during the year	—	—	—	—
Nonvested balance at December 31,	19,724	42.51	18,931	43.44