Significant Events	6 Months Ended
Significant Events	Jun. 30, 2020
Significant Events [Abstract]
Significant Events	Significant Events On March 11, 2020, the World Health Organization declared COVID-19, the disease caused by the novel coronavirus, a pandemic as a result of the global spread of the coronavirus illness. In response to the outbreak, federal and state authorities in the U.S. introduced various measures to try to limit or slow the spread of the virus, including travel restrictions, nonessential business closures, stay-at-home orders, and strict social distancing. The Corporation activated its Pandemic Preparedness Plan to protect the health of employees and clients, which includes temporarily limiting lobby hours and transitioning the vast majority of the Corporation’s workforce to remote work. The Corporation has not incurred any significant disruptions to its business activities. The full impact of COVID-19 is unknown and rapidly evolving. It has caused substantial disruption in international and U.S. economies, markets, and employment. The outbreak is having a significant adverse impact on certain industries the Corporation serves, including retail, hospitality, entertainment, and restaurants and food services. As of June 30, 2020, the Corporation’s aggregate outstanding exposure in these segments was $185.1 million, or 10.7% of the Corporation’s gross loans and leases. Based on management’s current assessment of the increased inherent risk in the loan portfolio, the allowance for loan and leases losses increased $7.9 million, or 40.7%, compared to December 31, 2019. The increase in the allowance for loan and lease losses was in large part due to an increase in several qualitative factors. Most notably, a $4.3 million increase was due to the economic conditions caused by the pandemic, including the increase in the unemployment rate, and an additional $953,000 stemmed from the other qualitative factors, such as management’s ongoing review and grading of the loan and lease portfolios, consideration of delinquency experience, and the level of loans and leases subject to more frequent review by management. Because of the significant uncertainties related to the ultimate duration of the COVID-19 pandemic and its effects on clients and prospects, and on the national and local economy as a whole, there can be no assurances as to how the crisis may ultimately affect the Corporation’s loan portfolio. The Corporation provided loan modifications up to six months to certain borrowers impacted by COVID-19 who were current in their payments at the inception of the Corporation’s loan modification program. As of June 30, 2020, the Corporation had processed 448 deferral requests, representing $323.2 million in total loans outstanding. Loan deferrals of six months accounted for 60.2% of the total $323.2 million in deferral requests and the remaining balance were primarily for three months. For loans subject to the program, each borrower is required to resume making regularly scheduled loan payment at the end of the modification period and the deferred amounts will be moved to the end of the loan term. The loan will not be reported as past due during the deferral period. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into law. The CARES Act is a $2 trillion stimulus package to provide relief to U.S. businesses and consumers struggling as a result of the pandemic. A provision in the CARES Act includes a $349 billion fund for the creation of the Paycheck Protection Program (“PPP”) through the Small Business Administration (“SBA”) and Treasury Department. On April 24, 2020, the Paycheck Protection Program and Health Care Enhancement Act was signed into law, adding an additional $320 billion of funding to the PPP. The PPP is intended to provide loans to small businesses to pay their employees, rent, mortgage interest, and utilities. The loans may be forgiven conditioned upon the client providing payroll documentation evidencing their compliant use of funds and otherwise complying with the terms of the program. The Corporation began accepting and processing applications for loans under the PPP on April 3, 2020. As of June 30, 2020, the Corporation had processed over 700 applications from existing and new clients, disbursed $327.9 million in funds, and received processing fee income from the SBA of $8.7 million. The processing fee income is deferred and amortized over the contractual life of the loan, or accelerated at forgiveness, as an adjustment of yield using the interest method. During the three months ended June 30, 2020, $859,000 was recognized in loans and leases interest income in the unaudited Consolidated Statements of Income. The SBA provides a guaranty to the lender of 100% of principal and interest, unless the lender violated an obligation under the agreement. As loan losses are expected to be immaterial, if any at all, due to the guaranty, management excluded the PPP loans from the allowance for loan and lease losses calculation. Management funded these short-term loans through a combination of excess cash held at the Federal Reserve and from an increase in in-market deposits.