Nature of Business and Significant Accounting Policies	9 Months Ended
Sep. 30, 2019
Accounting Policies [Abstract]
Nature of Business and Significant Accounting Policies	1. Nature of Business and Significant Accounting Policies The consolidated financial statements include accounts of Rhinebeck Bancorp, Inc. (the “Company”), a stock holding company, and its wholly-owned subsidiary, Rhinebeck Bank (the “Bank”), a New York chartered stock savings bank. The primary purpose of the Company is to act as a holding company for the Bank. The Bank provides a full range of banking and financial services to consumer and commercial customers through its eleven branches and two representative offices located in Dutchess, Ulster, Orange, and Albany counties. Financial services including investment advisory and financial product sales are offered through a division of the Bank doing business as Rhinebeck Asset Management (“RAM”). The unaudited consolidated financial statements reflect all adjustments, which in the opinion of management, are necessary for a fair presentation of the results of the interim periods and are of a normal and recurring nature. Operating results for the three and nine month periods ended September 30, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019 or for any other period. For more information regarding the Company’s significant accounting policies, see the Notes to the Consolidated Financial Statements in the Company’s Annual Report on Form 10‑K for the year ended December 31, 2018, filed with the Securities and Exchange Commission. As of September 30, 2019, the significant accounting policies of the Company have not changed materially from those disclosed in the Annual Report on Form 10‑K for the year ended December 31, 2018. Basis of Financial Statements Presentation The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and general practices within the banking industry. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities, as of the date of the consolidated statements of financial condition and reported amounts of revenues and expenses for the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses, the valuation of securities and other real estate owned, the evaluation of investment securities for other-than-temporary impairment, the evaluation of goodwill for impairment, the valuation of deferred tax assets and the determination of pension obligations. Principles of Consolidation The accompanying consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary. As a result of the reorganization, the consolidation refers to the Company and the Bank for the periods after January 16, 2019 and Rhinebeck Bancorp, MHC, a New York chartered mutual holding company, and the Bank for the periods prior to January 16, 2019. All significant intercompany accounts and transactions have been eliminated in consolidation. Reclassifications Certain amounts in the prior year consolidated financial statements have been reclassified to conform to the current year’s presentation. Impact of Recent Accounting Pronouncements Effective January 1, 2018, the Company adopted Accounting Standards Update (“ASU”) No. 2014‑09, “Revenue from Contracts with Customers (Topic 606)”. ASU No. 2014‑09 establishes principles for recognizing revenue upon the transfer of promised goods or services to customers, in an amount that reflects the expected consideration received in exchange for those goods or services. The Company used the modified retrospective method for transition with the cumulative effect recognized as of the date of initial application with no restatement of prior periods. The adoption did not have a material effect on the Company’s financial statements as the recognition of interest income has been scoped out of the guidance and noninterest income recognition is similar to current revenue recognition practices. See Note 14 for additional information related to the adoption of ASU No. 2014‑09. In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016‑02 “Leases (Topic 842).” This standard requires entities that lease assets to recognize on the balance sheet the assets and liabilities for the rights and obligations created by those leases. The standard is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2018 for public companies, but the Company will have until the first quarter of 2020 to adopt due to its emerging growth company status. The guidance is required to be applied by the modified retrospective transition approach. Early adoption is permitted. We are currently assessing the impact of the adoption of this authoritative guidance on our consolidated financial statements and collecting the data necessary for that assessment and adoption. In June 2016, the FASB issued ASU No. 2016‑13 on “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”. This ASU requires credit losses on most financial assets be measured at amortized cost and certain other instruments to be measured using an expected credit loss model (referred to as the current expected credit loss (“CECL”) model). Under this model, entities will estimate credit losses over the entire contractual term of the instrument (considering estimated prepayments, but not expected extensions or modifications unless reasonable expectation of a troubled debt restructuring exists) from the date of initial recognition of that instrument. The measurement of expected credit losses is based upon relevant information about past events, including historical experience, current conditions and reasonable and supportable forecasts that affect the collectability of the reported amount. On October 16, 2019, the FASB approved a delay for conversion to the CECL methodology to January 2023 for smaller reporting companies, other public business entities, private companies and non-profits; although early adoption is permitted in 2019. The Company is currently assessing the effect of ASU No. 2016‑13 and has engaged with a software vendor to assist in its efforts. Effective January 1, 2019, the Company adopted ASU No. 2018-07, “Compensation- Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting”. This update expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. As a result, nonemployee share-based payment awards will be measured at the grant-date fair value of the equity instruments that an entity is obligated to issue when the service has been rendered, subject to the probability of satisfying performance conditions when applicable. The Company has not and does not expect to engage in this type of compensation practice, and therefore this update did not and likely will not, have an effect on the Company. Effective January 1, 2019, the Company adopted ASU 2017-04 “Intangibles – Goodwill and Other (Topic 350).” ASU 2017-04 simplifies the test for goodwill impairment, which eliminates the second step in the goodwill impairment test which requires an entity to determine the implied fair value of the reporting unit’s goodwill. Instead, an entity should recognize an impairment loss if the carrying value of the net assets assigned to the reporting unit exceeds the fair value of the reporting unit, with the impairment loss not to exceed the amount of goodwill allocated to the reporting unit. The adoption of ASU 2017-04 did not have a material impact on the Company’s consolidated financial statements. Emerging Growth Company Status As an emerging growth company, the Company may delay adoption of new or revised financial accounting standards until such date that the standards are required to be adopted by non-issuer companies. If such standards would not apply to non-issuer companies, no deferral would be applicable. The Company intends to take advantage of the benefits of the extended transition periods allowed under the Jumpstart Our Business Startups Act. Accordingly, the Company’s consolidated financial statements may not be comparable to those of public companies that adopt new or revised financial accounting standards as of an earlier date. The effective dates of the recent accounting standards reflect those that relate to non-issuer companies.

1. Nature of Business and Significant Accounting Policies

The consolidated financial statements include accounts of Rhinebeck Bancorp, Inc. (the “Company”), a stock holding company, and its wholly-owned subsidiary, Rhinebeck Bank (the “Bank”), a New York chartered stock savings bank. The primary purpose of the Company is to act as a holding company for the Bank. The Bank provides a full range of banking and financial services to consumer and commercial customers through its eleven branches and two representative offices located in Dutchess, Ulster, Orange, and Albany counties. Financial services including investment advisory and financial product sales are offered through a division of the Bank doing business as Rhinebeck Asset Management (“RAM”).

The unaudited consolidated financial statements reflect all adjustments, which in the opinion of management, are necessary for a fair presentation of the results of the interim periods and are of a normal and recurring nature. Operating results for the three and nine month periods ended September 30, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019 or for any other period.

For more information regarding the Company’s significant accounting policies, see the Notes to the Consolidated Financial Statements in the Company’s Annual Report on Form 10‑K for the year ended December 31, 2018, filed with the Securities and Exchange Commission. As of September 30, 2019, the significant accounting policies of the Company have not changed materially from those disclosed in the Annual Report on Form 10‑K for the year ended December 31, 2018.

Basis of Financial Statements Presentation

The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and general practices within the banking industry. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities, as of the date of the consolidated statements of financial condition and reported amounts of revenues and expenses for the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses, the valuation of securities and other real estate owned, the evaluation of investment securities for other-than-temporary impairment, the evaluation of goodwill for impairment, the valuation of deferred tax assets and the determination of pension obligations.

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary. As a result of the reorganization, the consolidation refers to the Company and the Bank for the periods after January 16, 2019 and Rhinebeck Bancorp, MHC, a New York chartered mutual holding company, and the Bank for the periods prior to January 16, 2019. All significant intercompany accounts and transactions have been eliminated in consolidation.

Reclassifications

Certain amounts in the prior year consolidated financial statements have been reclassified to conform to the current year’s presentation.

Impact of Recent Accounting Pronouncements

Effective January 1, 2018, the Company adopted Accounting Standards Update (“ASU”) No. 2014‑09, “Revenue from Contracts with Customers (Topic 606)”. ASU No. 2014‑09 establishes principles for recognizing revenue upon the transfer of promised goods or services to customers, in an amount that reflects the expected consideration received in exchange for those goods or services. The Company used the modified retrospective method for transition with the cumulative effect recognized as of the date of initial application with no restatement of prior periods. The adoption did not have a material effect on the Company’s financial statements as the recognition of interest income has been scoped out of the guidance and noninterest income recognition is similar to current revenue recognition practices. See Note 14 for additional information related to the adoption of ASU No. 2014‑09.

In February 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016‑02 “Leases (Topic 842).” This standard requires entities that lease assets to recognize on the balance sheet the assets and liabilities for the rights and obligations created by those leases. The standard is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2018 for public companies, but the Company will have until the first quarter of 2020 to adopt due to its emerging growth company status. The guidance is required to be applied by the modified retrospective transition approach. Early adoption is permitted. We are currently assessing the impact of the adoption of this authoritative guidance on our consolidated financial statements and collecting the data necessary for that assessment and adoption.

In June 2016, the FASB issued ASU No. 2016‑13 on “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”. This ASU requires credit losses on most financial assets be measured at amortized cost and certain other instruments to be measured using an expected credit loss model (referred to as the current expected credit loss (“CECL”) model). Under this model, entities will estimate credit losses over the entire contractual term of the instrument (considering estimated prepayments, but not expected extensions or modifications unless reasonable expectation of a troubled debt restructuring exists) from the date of initial recognition of that instrument. The measurement of expected credit losses is based upon relevant information about past events, including historical experience, current conditions and reasonable and supportable forecasts that affect the collectability of the reported amount. On October 16, 2019, the FASB approved a delay for conversion to the CECL methodology to January 2023 for smaller reporting companies, other public business entities, private companies and non-profits; although early adoption is permitted in 2019. The Company is currently assessing the effect of ASU No. 2016‑13 and has engaged with a software vendor to assist in its efforts.

Effective January 1, 2019, the Company adopted ASU No. 2018-07, “Compensation- Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting”. This update expands the scope of Topic 718 to include share-based payment transactions for acquiring goods and services from nonemployees. As a result, nonemployee share-based payment awards will be measured at the grant-date fair value of the equity instruments that an entity is obligated to issue when the service has been rendered, subject to the probability of satisfying performance conditions when applicable. The Company has not and does not expect to engage in this type of compensation practice, and therefore this update did not and likely will not, have an effect on the Company.

Effective January 1, 2019, the Company adopted ASU 2017-04 “Intangibles – Goodwill and Other (Topic 350).” ASU 2017-04 simplifies the test for goodwill impairment, which eliminates the second step in the goodwill impairment test which requires an entity to determine the implied fair value of the reporting unit’s goodwill. Instead, an entity should recognize an impairment loss if the carrying value of the net assets assigned to the reporting unit exceeds the fair value of the reporting unit, with the impairment loss not to exceed the amount of goodwill allocated to the reporting unit. The adoption of ASU 2017-04 did not have a material impact on the Company’s consolidated financial statements.

Emerging Growth Company Status

As an emerging growth company, the Company may delay adoption of new or revised financial accounting standards until such date that the standards are required to be adopted by non-issuer companies. If such standards would not apply to non-issuer companies, no deferral would be applicable. The Company intends to take advantage of the benefits of the extended transition periods allowed under the Jumpstart Our Business Startups Act.

Accordingly, the Company’s consolidated financial statements may not be comparable to those of public companies that adopt new or revised financial accounting standards as of an earlier date. The effective dates of the recent accounting standards reflect those that relate to non-issuer companies.