Loans and Other Real Estate - Company's Non-Performing Assets and Its Accruing Troubled Debt Restructurings (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans	$ 15,917	$ 12,130
Other real estate and other repossessed assets	944	830
TOTAL NON-PERFORMING ASSETS	16,861	12,960
Troubled debt restructurings, still accruing	5,029	9,293
Commercial, secured by real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans	9,164	7,192
Commercial, industrial and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans	795	1,019
Equipment finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans	271	501
Real estate - residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans	3,250	1,986
Home equity and consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans	$ 2,437	$ 1,432