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ACQUISITION - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 01, 2018	Dec. 31, 2017	Dec. 31, 2016
Liabilities [Abstract]
Goodwill	$ 32,160		$ 18,742	$ 18,742
Westbound Bank
Assets [Abstract]
Cash and due from banks		$ 24,927
Investment securities available for sale		15,264
Loans, net of discount		154,687
Accrued interest receivable		651
Premises and equipment		8,625
Nonmarketable equity securities		0
Core deposit intangible		2,700
Other assets		9,205
Total assets acquired		216,059
Liabilities [Abstract]
Accrued interest and other liabilities		1,565
Total liabilities assumed		193,486
Net assets acquired		22,573
Total consideration paid		35,991
Goodwill		13,418
Noninterest-bearing deposits | Westbound Bank
Liabilities [Abstract]
Financial liabilities		40,595
Interest-bearing deposits | Westbound Bank
Liabilities [Abstract]
Financial liabilities		140,826
Subordinated debentures | Westbound Bank
Liabilities [Abstract]
Financial liabilities		$ 10,500

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