INCOME TAXES: (Details 2) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Other than temporary impairment	$ 764	$ 753
Net unrealized losses on retirement plans	6,033	8,132
Loan loss provisions	12,476	12,150
Unfunded commitments	764	0
Deferred compensation	2,367	2,496
Compensated absences	739	623
Post-retirement benefits	1,284	1,286
Lease liability	1,597	1,450
Purchase accounting	1,333	1,060
Deferred loss on acquisition	0	0
Other	2,770	2,186
GROSS DEFERRED ASSETS	30,127	30,136
Deferred tax liabilities:
Net unrealized gains on securities available-for-sale	(4,269)	(8,752)
Depreciation	(1,611)	(2,155)
Mortgage servicing rights	(515)	(390)
Pensions	(1,647)	(843)
Right-of-use asset	(1,591)	(1,446)
Intangibles	(5,717)	(5,458)
FHLB stock dividends	(32)	(111)
Other	(4,113)	(3,963)
GROSS DEFERRED LIABILITIES	(19,495)	(23,118)
NET DEFERRED TAX ASSETS	$ 10,632	$ 7,018