INCOME TAXES: (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Federal:
Currently payable	$ 7,978	$ 7,886	$ 7,118
Deferred	1,488	1,188	2,435
Federal income tax expense (benefit), continuing operations	9,466	9,074	9,553
State:
Currently payable	3,080	2,422	2,168
Deferred	80	196	406
State and local income tax expense (benefit), continuing operations	3,160	2,618	2,574
TOTAL	$ 12,626	$ 11,692	$ 12,127