Significant Events	3 Months Ended
Significant Events	Mar. 31, 2021
Significant Events [Abstract]
Significant Events	Other 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 long-term impact of the COVID-19 pandemic is unknown and continues to evolve. It has caused substantial disruption in international and U.S. economies, markets, and employment. The outbreak has had a significant adverse impact on certain industries the Corporation serves, including retail, restaurants and food services, hospitality, and entertainment. As of March 31, 2021, the Corporation’s aggregate outstanding exposure in these segments was $194.5 million, or 9.9% of the Corporation’s gross loans and leases. 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 payment deferrals for certain borrowers impacted by COVID-19 who were current in their payments at the inception of the Corporation’s loan modification program. As of March 31, 2021, the Corporation had seven deferral requests outstanding, representing $13.0 million in total loans, or 0.7% of gross loans and leases, excluding gross PPP loans, compared to $27.0 million, or 1.4% of gross loans and leases, excluding gross PPP loans as of December 31, 2020. 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 December 27, 2020, the Consolidated Appropriations Act, 2021 (“CAA”) was signed into law. The CAA is a $2.3 trillion spending bill that combines $900 billion in stimulus relief for the COVID-19 pandemic in the United States with a $1.4 trillion omnibus spending bill for the 2021 federal fiscal year and prevents a government shutdown. The CAA allows for a second draw for certain businesses under the PPP. Like the original program, loan proceeds are available to help fund payroll and group health benefit costs, as well as certain mortgage interest, rent and utilities. In addition, authorized costs now also include COVID-19 related worker protection costs, uninsured property damage costs due to looting or vandalism during 2020 and certain supplier costs and expenses for operations. The CAA also expands benefit costs to include group dental, vision, life and disability benefits. All of these changes are generally retroactive to the original CARES Act, meaning that the changes may be taken into account in processing loan forgiveness with respect to an original PPP loan. The Corporation began accepting and processing applications for second draw PPP loans on January 13, 2021. As of March 31, 2021, the Corporation had $272.7 million in gross PPP loans outstanding and deferred processing fees outstanding of $5.1 million. The processing fees are deferred and recognized 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 March 31, 2021, $2.2 million 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, due to the guaranty, management excluded the PPP loans from the allowance for loan and lease losses calculation. Management funded these short-term loans primarily through a combination of excess cash held at the Federal Reserve and from an increase in in-market deposits.