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Parent Company Only Financial Statements - Summary of Parent Company Only Condensed Statements of Cashflows (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Cash flows from operating activities: |  |
Net income | $ 17,697 | $ 4,604
Deferred income tax (benefit) expense | (1,680) | (85)
Amortization of subordinated debt issuance costs | 55 | 33
Increase in other assets | (26,303) | (9,209)
Decrease in accrued expenses | 11,949 | 8,471
Net cash used in operating activities | (108,340) | (20,583)
Cash flows used in investing activities: |  |
Purchase of securities available for sale | (44,164) | (70,737)
Net cash used in investing activities | (340,885) | (94,682)
Cash flows from financing activities: |  |
Common stock issuance, net of fees |  | 22,119
Issuance of subordinated debt | 15,000 |
Payment of subordinated debt issuance costs | (349) |
Common stock dividends paid | (2,436) | (2,473)
Net cash provided by financing activities | 507,144 | 160,265
Net increase in cash and due from banks | 57,919 | 45,000
Supplemental Schedule of Cash Flow Information |  |
Interest | 10,030 | 9,090
Income taxes | 2,000 | 1,020
Non-cash investing and financing activities: |  |
Unrealized gain on available-for-sale securities | 1,029 | 1,767
Issuance of restricted stock awards, net of forfeitures | 567 | 230
Parent Company [Member] |  |
Cash flows from operating activities: |  |
Net income | 17,696 | 4,580
Equity in undistributed earnings of subsidiary | (19,689) | (6,373)
Deferred income tax (benefit) expense | (62) | (19)
Amortization of subordinated debt issuance costs | 54 | 33
Realized gains on securities sales |  | 110
Increase in other assets | (139) | (206)
Decrease in accrued expenses | (39) |
Net cash used in operating activities | (2,179) | (1,875)
Cash flows used in investing activities: |  |
Purchase of securities available for sale | (6,000) | (161)
Net change in investments | (1,363) |
Proceeds from sales of securities available for sale |  | 66
Cash contributed to Bank | (2,000) | (17,000)
Net cash used in investing activities | (9,363) | (17,095)
Cash flows from financing activities: |  |
Common stock issuance, net of fees | 567 | 22,350
Issuance of subordinated debt | 15,000 |
Payment of subordinated debt issuance costs | (349) |
Common stock dividends paid | (2,436) | (2,473)
Net cash provided by financing activities | 12,782 | 19,877
Net increase in cash and due from banks | 1,240 | 907
Cash and cash equivalents, beginning of year | 934 | 27
Cash and cash equivalents, end of year | 2,174 | 934
Supplemental Schedule of Cash Flow Information |  |
Interest | 1,190 | 709
Income taxes | 2,000 | 1,020
Non-cash investing and financing activities: |  |
Unrealized gain on available-for-sale securities | 358 | 217
Issuance of restricted stock awards, net of forfeitures | $ 567 | $ 230

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