Retirement Plans (Details Textuals) (Details) - USD ($) $ in Millions			9 Months Ended
	Feb. 14, 2020	Jun. 14, 2019	Sep. 30, 2020	Sep. 30, 2019
Huntington National Bank
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Effective Date of Acquisition		Jun. 14, 2019
First Staunton Bancshares [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Effective Date of Acquisition	Feb. 14, 2020
RAP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Description			The Corporation has a noncontributory defined benefit retirement account plan, the RAP, covering substantially all employees who meet participation requirements. The benefits are based primarily on years of service and the employee’s compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. Any retirement plans of acquired entities are typically merged into the RAP after completion of the mergers, and credit is usually given to employees for years of service at the acquired institution for vesting and eligibility purposes.
Defined Benefit Plan, Plan Assets, Contributions by Employer			$ 0	$ 0