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Condensed Financial Statements of Parent Company - Statements of Cash Flows (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cash Flows from Operating Activities |  |  |
Net income | $ 23,495 | $ 20,095 | $ 18,402
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Amortization of premiums on available-for-sale securities, net | 2,203 | 1,289 | 822
Amortization of subordinated note issuance costs | 50 |  |
Stock-based compensation expense | 822 | 1,024 | 1,088
Director stock awards | 73 | 48 |
(Gain) loss on sales of available-for-sale securities | (293) | (270) | 26
Changes in assets and liabilities: |  |  |
Other assets and liabilities | 3,169 | (573) | 5,951
Net cash provided by operating activities | 34,741 | 27,382 | 23,931
Activity in available-for-sale securities: |  |  |
Maturities, prepayments and calls | 56,310 | 91,003 | 67,071
Sales | 9,292 | 11,843 | 11,100
Purchases | (170,629) | (183,563) | (110,166)
Net cash used in investing activities | (265,694) | (177,724) | (149,316)
Cash Flows from Financing Activities |  |  |
Proceeds of other borrowings | 40,000 |  |
Purchase of treasury stock | (338) | (383) | (381)
Proceeds from issuance of subordinated notes | 34,421 |  |
Payment of dividends | (7,670) | (7,186) | (6,345)
Net cash provided by financing activities | 236,070 | 274,752 | 138,316
Net Increase in Cash and Cash Equivalents | 5,117 | 124,410 | 12,931
Cash and Cash Equivalents - Beginning of Year | 175,706 | 51,296 | 38,365
Cash and Cash Equivalents - End of Year | 180,823 | 175,706 | 51,296
Farmers & Merchants State Bank [Member] |  |  |
Cash Flows from Operating Activities |  |  |
Net income | 23,495 | 20,095 | 18,402
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Equity in undistributed net income | (1,480) | (11,652) | (5,724)
Amortization of premiums on available-for-sale securities, net | 81 | 154 | 99
Amortization of subordinated note issuance costs | 49 |  |
Stock-based compensation expense | 822 | 1,024 | 1,088
Director stock awards | 73 | 48 |
(Gain) loss on sales of available-for-sale securities | (293) |  |
Changes in assets and liabilities: |  |  |
Other assets and liabilities | (456) | 1,742 | (2,692)
Net cash provided by operating activities | 22,291 | 11,411 | 11,173
Activity in available-for-sale securities: |  |  |
Maturities, prepayments and calls | 795 | 385 | 7,060
Sales | 7,773 |  | 500
Purchases |  | (745) | (11,453)
Maturities of certificates of deposit | 493 |  |
Acquisition, net of cash received | (79,235) |  |
Net cash used in investing activities | (70,174) | (360) | (3,893)
Cash Flows from Financing Activities |  |  |
Proceeds of other borrowings | 35,000 |  |
Purchase of treasury stock | (338) | (383) | (381)
Proceeds from issuance of subordinated notes | 34,421 |  |
Payment of dividends | (7,670) | (7,186) | (6,345)
Net cash provided by financing activities | 61,413 | (7,569) | (6,726)
Net Increase in Cash and Cash Equivalents | 13,530 | 3,482 | 554
Cash and Cash Equivalents - Beginning of Year | 5,763 | 2,281 | 1,727
Cash and Cash Equivalents - End of Year | $ 19,293 | $ 5,763 | $ 2,281

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