Nature of Operations and Summary of Significant Accounting Policies Nature of Operations and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of PresentationThe accompanying unaudited Consolidated Financial Statements were prepared in accordance with GAAP and the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with the Corporation’s Consolidated Financial Statements and footnotes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2020.
Principles of Consolidation	The unaudited Consolidated Financial Statements include the accounts of the Corporation and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. In accordance with the provisions of Accounting Standards Codification (“ASC”) Topic 810, the Corporation’s ownership interest in FBFS Statutory Trust II (“Trust II”) has not been consolidated into the financial statements.
Use of Estimates	Management of the Corporation is required to make estimates and assumptions which affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements as well as reported amounts of revenues and expenses during the reporting period. Actual results could differ significantly from those estimates. Material estimates that could significantly change in the near-term include the value of securities and interest rate swaps, level of the allowance for loan and lease losses, lease residuals, property under operating leases, goodwill, level of the Small Business Administration (“SBA”) recourse reserve, and income taxes.
Reclassification	Certain amounts in prior periods may have been reclassified to conform to the current presentation.
Subsequent Events	Subsequent events have been evaluated through the date of the issuance of the unaudited Consolidated Financial Statements. No significant subsequent events have occurred through this date requiring adjustment to the financial statements or disclosures.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments- Credit Losses (Topic 326),” which is often referred to as CECL. The ASU replaces the incurred loss impairment methodology for recognizing credit losses with a methodology that reflects all expected credit losses. The ASU also requires consideration of a broader range of information to inform credit loss estimates, including such factors as past events, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. The amendments affect loans, debt securities, trade receivables, net investments in leases, off-balance sheet credit exposures, and any other financial asset not excluded from the scope under which the Corporation has the contractual right to receive cash. Entities will apply the amendments in the ASU through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. In November 2019, the FASB issued ASU No. 2019-10, “Financial Instruments—Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842).” The ASU delays the effective date for the credit losses standard from January 2020 to January 2023 for certain entities, including certain Securities and Exchange Commission filers, public business entities, and private companies. As a smaller reporting company, the Corporation is eligible for the delay and will be deferring adoption. The Corporation has established a cross-functional committee and has implemented a third-party software solution to assist with the adoption of the standard. Management has gathered all necessary data and reviewed potential methods to calculate the expected credit losses. Management is currently calculating sample expected loss computations and developing the allowance methodology and assumptions that will be used under the new standard. Management will continue to progress on its implementation project plan and improve the Corporation’s approach throughout the deferral period. In March 2020, the FASB issued ASU 2020-04 "Reference Rate Reform (Topic 848)," which provides temporary, optional practical expedients and exceptions to ease the potential burden of transitioning to the new reference rates which will replace LIBOR and other reference rates expected to be discontinued. Adoption of the provisions of ASU 2020-04 is optional. The amendments are effective for all entities from the beginning of the interim period that includes the issuance date of the ASU. An entity may elect to apply the amendments prospectively through December 31, 2022. The Corporation is currently evaluating the impact of ASU 2020-04 on its financial position, results of operations and liquidity. The adoption of this standard is not expected to have a material effect on the Corporation's operating results or financial condition. In January, 2021, the FASB released ASU 2021-01, ‘Reference Rate Reform (Topic 848),’ which clarifies that certain optional expedients and exceptions in topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition related to reference rate reform. The amendments in this update are effective immediately for all entities. An entity may elect to apply the amendments in the update on a full retrospective basis as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020, or on a prospective basis to new modifications from any date within an interim period that includes or is subsequent to the date of the issuance of a final update, up to the date that financial statements are available to be issued. The Corporation does not expect this amendment to have a material effect on its financial statements.