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FAIR VALUE MEASUREMENTS - Measured on Non-recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Assets
Other real estate owned	$ 2,318	$ 2,318	$ 2,236
Non-recurring | Level 1
Assets
Total	0	0	0
Non-recurring | Level 2
Assets
Total	0	0	0
Non-recurring | Level 3
Assets
Impaired loans	9,623	9,623	9,625
Capitalized servicing rights	3,234	3,234	4,301
Other real estate owned	2,318	2,318	2,236
Premises held for sale	1,764	1,764	1,764
Total	16,939	16,939	17,926
Total Gains (Losses)	(1,838)	(983)
Non-recurring | Level 3 | Impaired loans
Assets
Total Gains (Losses)	(1,288)	2
Non-recurring | Level 3 | Capitalized servicing rights
Assets
Total Gains (Losses)	(663)	(1,067)
Non-recurring | Level 3 | Other real estate owned
Assets
Total Gains (Losses)	113	82
Non-recurring | Level 3 | Assets held for sale
Assets
Premises held for sale	$ 1,764	$ 1,764	$ 1,764

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