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LOANS AND ALLOWANCE FOR LOAN LOSSES - Loans and Leases Individually Evaluated for Impairment by Class of Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Unpaid Principal Balance
Total	$ 51,923		$ 51,923		$ 27,027
Recorded Investment
Total	51,720		51,720		26,945
Allowance for Loan and Lease Losses	7,493		7,493		829
Average Recorded Investment	52,514	$ 28,315	44,518	$ 27,358
Interest Income Recognized	106	63	492	188
Cash Basis Interest Recognized	93	54	458	159
Commercial | Commercial and industrial
Unpaid Principal Balance
With no related allowance recorded	1,749		1,749		5,491
With an allowance recorded	20,310		20,310		0
Recorded Investment
With no related allowance recorded	1,738		1,738		5,455
With an allowance recorded	20,304		20,304		0
Allowance for Loan and Lease Losses	4,614		4,614		0
Average Recorded Investment	22,619	5,423	16,154	5,552
Interest Income Recognized	40	0	295	4
Cash Basis Interest Recognized	32	0	286	4
Commercial | Commercial real estate
Unpaid Principal Balance
With no related allowance recorded	0		0		0
Recorded Investment
With no related allowance recorded	0		0		0
Average Recorded Investment	0		193
Interest Income Recognized	0		0
Cash Basis Interest Recognized	0		0
Commercial | SBA
Unpaid Principal Balance
With no related allowance recorded	1,387		1,387		1,668
With an allowance recorded	4,572		4,572		823
Recorded Investment
With no related allowance recorded	1,321		1,321		1,588
With an allowance recorded	4,375		4,375		788
Allowance for Loan and Lease Losses	2,858		2,858		562
Average Recorded Investment	5,843	1,240	4,328	756
Interest Income Recognized	4	0	12	0
Cash Basis Interest Recognized	4	0	12	0
Commercial | Construction
Unpaid Principal Balance
With no related allowance recorded	2,519		2,519		0
Recorded Investment
With no related allowance recorded	2,519		2,519		0
Average Recorded Investment	2,519		2,519
Interest Income Recognized	0		0
Cash Basis Interest Recognized	0		0
Consumer | Single family residential mortgage
Unpaid Principal Balance
With no related allowance recorded	20,544		20,544		12,115
With an allowance recorded	0		0		5,993
Recorded Investment
With no related allowance recorded	20,641		20,641		12,161
With an allowance recorded	0		0		6,032
Allowance for Loan and Lease Losses	0		0		161
Average Recorded Investment	20,706	20,908	20,374	20,299
Interest Income Recognized	59	60	175	175
Cash Basis Interest Recognized	53	50	150	146
Consumer | Other consumer
Unpaid Principal Balance
With no related allowance recorded	821		821		469
With an allowance recorded	21		21		468
Recorded Investment
With no related allowance recorded	801		801		469
With an allowance recorded	21		21		452
Allowance for Loan and Lease Losses	21		21		$ 106
Average Recorded Investment	827	744	950	751
Interest Income Recognized	3	3	10	9
Cash Basis Interest Recognized	$ 4	$ 4	$ 10	$ 9

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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