Securities (Additional Information) (Details) $ in Thousands	Mar. 31, 2020 USD ($) security	Dec. 31, 2019 USD ($)
Debt Securities, Available-for-sale [Line Items]
Securities available-for-sale \| $	$ 230,671	$ 180,905
Number of securities \| security	321
Number of securities in an unrealized loss position \| security	81
Credit Concentration Risk \| Securities \| Tax-exempt securities backed by the Michigan School Bond Loan Fund
Debt Securities, Available-for-sale [Line Items]
Number of securities \| security	72
Securities available-for-sale \| $	$ 52,700
Collateral pledged
Debt Securities, Available-for-sale [Line Items]
Securities pledged \| $	$ 52,000	$ 27,300

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Debt Securities, Available-For-Sale, Number Of Positions

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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