We had operating income for the six months ended June 30, 2021 of $5,498,000 compared to an operating loss of $6,492,000 for the six months ended June 30, 2020, an increase of $11,990,000. The increase was a result of the increase in net operating revenue and a decrease in station operating expense, noted above, and a non-cash impairment charge related to our broadcast licenses of $3,757,000 in 2020, a decrease in corporate general and administrative expenses of $1,153,000 partially offset by a decrease in other operating income of $1,261,000. The decrease in corporate general and administrative expenses was primarily attributable to decreases in non-cash compensation expenses of $481,000, legal expenses of $136,000, contribution expenses of $126,000, compensation-related expenses of $194,000 and overall expense reductions of $200,000, respectively, from the comparable period of 2020. In the first quarter of 2020 we recorded the gain on the sale of a tower and a building on one of our tower sites in our Bellingham, Washington market of $1,400,000 in other operating (income) expenses.
We generated net income of $4,011,000 ($0.67 per share on a fully diluted basis) during the six months ended June 30, 2021, compared to a net loss of $3,231,000 ($0.54 per share on a fully diluted basis) for the six months ended June 30, 2020, an increase of $7,242,000. The increase in net income is primarily due to the increase in operating income, described above, partially offset by an increase in income tax expense of $4,760,000. The increase in our income tax expense is due to the increase in income before income tax.
Liquidity and Capital Resources
Debt Arrangements and Debt Service Requirements
On August 18, 2015, we entered into a new credit facility (the “Credit Facility”) with JPMorgan Chase Bank, N.A., The Huntington National Bank, Citizens Bank, National Association and J.P. Morgan Securities LLC (collectively, the “Lenders”). The Credit Facility consists of a $100 million five-year revolving facility (the “Revolving Credit Facility”) and originally matured on August 18, 2020. On June 27, 2018, the Company entered into a Second Amendment to its Credit Facility, (the “Second Amendment”), which had first been amended on September 1, 2017, extending the revolving credit maturity date under the Credit Agreement for five years after the date of the amendment to June 27, 2023. On July 1, 2019, we elected to reduce our Revolving Credit Facility to $70 million. On May 11, 2020, as part of our reincorporation as a Florida corporation, we entered into an assumption agreement and amendment of loan documents.
We have pledged substantially all of our assets (excluding our FCC licenses and certain other assets) in support of the Credit Facility and each of our subsidiaries has guaranteed the Credit Facility and has pledged substantially all of their assets (excluding their FCC licenses and certain other assets) in support of the Credit Facility.
Approximately $266,000 of debt issuance costs related to the Credit Facility were capitalized and are being amortized over the life of the Credit Facility. These debt issuance costs are included in other assets, net in the consolidated balance sheets. As a result of the Second Amendment, the Company incurred an additional $120,000 of transaction fees related to the Credit Facility that were capitalized. The cumulative transaction fees are being amortized over the remaining life of the Credit Facility.
Interest rates under the Credit Facility are payable, at our option, at alternatives equal to LIBOR (0.1250% at June 30, 2021), plus 1% to 2% or the base rate plus 0% to 1%. The spread over LIBOR and the base rate vary from time to time, depending upon our financial leverage. As previously noted, the May 11, 2020 amendment to the Credit Facility includes an alternative to LIBOR in the event LIBOR is no longer available. Letters of credit issued under the Credit Facility will be subject to a participation fee (which is equal to the interest rate applicable to Eurocurrency Loans, as defined in the Credit Agreement) payable to each of the Lenders and a fronting fee equal to 0.25% per annum payable to the issuing bank. We also pay quarterly commitment fees of 0.2% to 0.3% per annum on the unused portion of the Revolving Credit Facility.
The Credit Facility contains a number of financial covenants (all of which we were in compliance with at June 30, 2021) which, among other things, require us to maintain specified financial ratios and impose certain limitations on us with respect to investments, additional indebtedness, dividends, distributions, guarantees, liens and encumbrances.
We had approximately $60 million of unused borrowing capacity under the Revolving Credit Facility at June 30, 2021.