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FAIR VALUE MEASUREMENTS - Measured on Non-recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Assets
Other real estate owned	$ 122	$ 122	$ 90
Non-recurring | Level 3
Assets
Total	14,244	14,244	6,804
Total Gains (Losses)	(43)	(139)
Non-recurring | Level 3 | Impaired loans
Assets
Impaired loans	10,251	10,251	6,709
Total Gains (Losses)	(43)	(139)
Non-recurring | Level 3 | Capitalized servicing rights
Assets
Capitalized servicing rights	3,871	3,871	5
Total Gains (Losses)	0	0
Non-recurring | Level 3 | Other real estate owned
Assets
Other real estate owned	122	122	$ 90
Total Gains (Losses)	$ 0	$ 0

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Section 50
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Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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