Revenue from Contracts with Customers (Policies)	9 Months Ended
Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Accounting Policy Updates The Corporation adopted Topic 606 “Revenue from Contracts with Customers” effective January 1, 2018 and has applied the guidance to all contracts within the scope of Topic 606 as of that date. As a result, the Corporation has modified its accounting policy for revenue recognition as detailed herein. As discussed in Note 2, the Corporation applied Topic 606 using the modified retrospective method, therefore, the prior period comparative information has not been adjusted and continues to be reported under Topic 605. There was no cumulative effect adjustment as of January 1, 2018, and there were no material changes to our unaudited consolidated financial statements at or for the nine months ended September 30, 2018, as a result of adopting Topic 606. The Corporation applied the practical expedient pertaining to contracts with original expected duration of one year or less and does not disclose information about remaining performance obligations on such contracts. The Corporation also applied the practical expedient pertaining to contracts for which, at contract inception, the period between when the entity transfers the services and when the customer pays for those services will be one year or less. As such, the Corporation does not adjust the consideration from customers for the effects of a significant financing component. A substantial portion of the Corporation’s revenue is specifically excluded from the scope of Topic 606. For the revenue that is within scope of Topic 606, the following is a description of principal activities from which the Corporation generates its revenue from contracts with customers, separated by the timing of revenue recognition. Revenue Recognized at a Point in Time The Corporation recognizes revenue that is transactional in nature and such revenue is earned at a point in time. Revenue that is recognized at a point in time includes card interchange fees (fee income related to debit card transactions), ATM fees, wire transfer fees, overdraft charge fees, and stop-payment and returned check fees. Such revenue is derived from transactional information and is recognized as revenue immediately as the transactions occur or upon providing the service to complete the customer’s transaction. Revenue Recognized Over Time The Corporation recognizes revenue over a period of time, generally monthly, as services are performed and performance obligations are satisfied. Such revenue includes wealth management revenues and service charges on deposit accounts. Wealth management revenues are categorized as either asset-based revenues or transaction-based revenues. Asset-based revenues include trust and investment management fees that are earned based upon a percentage of asset values under administration. Transaction-based revenues include financial planning fees, tax preparation fees, commissions and other service fees. Fee revenue from service charges on deposit accounts represent the service charges assessed to customer who hold deposit accounts at the Bank. Costs of Obtaining Revenue from Contracts with Customers The Corporation pays commissions and incentives to its employees in accordance with certain employment arrangements and incentive plans. For commissions and incentives that are excluded from the scope of Topic 606, such as those paid to mortgage originator employees, the Corporation expenses these costs when incurred or applies the guidance in ASC Topic 310. For commissions and incentives that are in-scope of Topic 606, such as those paid to employees in our wealth management services and commercial banking segments in order to obtain customer contracts, contract cost assets are established. The contract cost assets are capitalized and amortized over the estimated useful life that the asset is expected to generate benefits. The amortization of the contract cost asset is recorded within salaries and employee benefits expense.

Accounting Policy Updates

The Corporation adopted Topic 606 “Revenue from Contracts with Customers” effective January 1, 2018 and has applied the guidance to all contracts within the scope of Topic 606 as of that date. As a result, the Corporation has modified its accounting policy for revenue recognition as detailed herein.

As discussed in Note 2, the Corporation applied Topic 606 using the modified retrospective method, therefore, the prior period comparative information has not been adjusted and continues to be reported under Topic 605. There was no cumulative effect adjustment as of January 1, 2018, and there were no material changes to our unaudited consolidated financial statements at or for the nine months ended September 30, 2018, as a result of adopting Topic 606.

The Corporation applied the practical expedient pertaining to contracts with original expected duration of one year or less and does not disclose information about remaining performance obligations on such contracts.

The Corporation also applied the practical expedient pertaining to contracts for which, at contract inception, the period between when the entity transfers the services and when the customer pays for those services will be one year or less. As such, the Corporation does not adjust the consideration from customers for the effects of a significant financing component.

A substantial portion of the Corporation’s revenue is specifically excluded from the scope of Topic 606. For the revenue that is within scope of Topic 606, the following is a description of principal activities from which the Corporation generates its revenue from contracts with customers, separated by the timing of revenue recognition.

Revenue Recognized at a Point in Time

The Corporation recognizes revenue that is transactional in nature and such revenue is earned at a point in time. Revenue that is recognized at a point in time includes card interchange fees (fee income related to debit card transactions), ATM fees, wire transfer fees, overdraft charge fees, and stop-payment and returned check fees. Such revenue is derived from transactional information and is recognized as revenue immediately as the transactions occur or upon providing the service to complete the customer’s transaction.

Revenue Recognized Over Time

The Corporation recognizes revenue over a period of time, generally monthly, as services are performed and performance obligations are satisfied. Such revenue includes wealth management revenues and service charges on deposit accounts. Wealth management revenues are categorized as either asset-based revenues or transaction-based revenues. Asset-based revenues include trust and investment management fees that are earned based upon a percentage of asset values under administration. Transaction-based revenues include financial planning fees, tax preparation fees, commissions and other service fees. Fee revenue from service charges on deposit accounts represent the service charges assessed to customer who hold deposit accounts at the Bank.

Costs of Obtaining Revenue from Contracts with Customers

The Corporation pays commissions and incentives to its employees in accordance with certain employment arrangements and incentive plans. For commissions and incentives that are excluded from the scope of Topic 606, such as those paid to mortgage originator employees, the Corporation expenses these costs when incurred or applies the guidance in ASC Topic 310. For commissions and incentives that are in-scope of Topic 606, such as those paid to employees in our wealth management services and commercial banking segments in order to obtain customer contracts, contract cost assets are established. The contract cost assets are capitalized and amortized over the estimated useful life that the asset is expected to generate benefits. The amortization of the contract cost asset is recorded within salaries and employee benefits expense.