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FAIR VALUE MEASUREMENTS - Measured on Non-recurring Basis (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Assets
Other real estate owned	$ 2,455,000	$ 2,455,000	$ 2,351,000
Non-recurring | Level 3
Assets
Impaired loans	14,382,000	14,382,000	15,213,000
Capitalized servicing rights	4,108,000	4,108,000	4,882,000
Other real estate owned	2,455,000	2,455,000	2,351,000
Assets held for sale	1,800,000	1,800,000	0
Total	22,846,000	22,846,000	22,446,000
Total Gains (Losses)	(328,000)	685,000
Impaired loans | Non-recurring | Level 3
Assets
Total Gains (Losses)	(182,000)	831,000
Capitalized servicing rights | Non-recurring | Level 3
Assets
Total Gains (Losses)	0	0
Other real estate owned | Non-recurring | Level 3
Assets
Total Gains (Losses)	(146,000)	(146,000)
Assets held for sale | Non-recurring | Level 3
Assets
Assets held for sale	1,901,000	1,901,000	$ 0
Total Gains (Losses)	$ 0	$ 0

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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

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