LOW INCOME HOUSING PROJECT INVESTMENTS Low Income Housing Project Investments (Details) - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Tax Expense related to a change in tax law		$ 0	$ 0	$ 466,000
Original Investment in Low Income Housing Projects		96,275,000	50,232,000	47,399,000
Amortization Method Qualified Affordable Housing Project Investments		72,510,000	33,681,000	35,225,000
Qualified Affordable Housing Project Investments, Commitment		34,967,000	3,935,000	4,536,000
Affordable Housing Tax Credits and Other Tax Benefits, Amount		7,342,000	5,407,000	5,654,000
Amortization Method Qualified Affordable Housing Project Investments, Amortization	[1]	5,645,000	4,377,000	4,402,000
Income (Loss) from Affordable Housing Projects, Equity Method Investments		$ 1,696,000	$ 1,030,000	1,253,000
Investments in Low Income Housing Projects [Member]
Tax Expense related to a change in tax law				$ 466,000

[1] The 2017 amount is inclusive of $466,000 related to the revaluation of Low Income Housing tax credit investments as a result of the 2017 Tax Act.