Interest on borrowings under the Credit Facility is calculated at a spread over either the New York Federal Reserve Bank Rate, the prime rate, or the London Interbank Offered Rate (LIBOR), depending on various factors. The Credit Facility also requires a facility fee ranging from 10 to 25 basis points per annum on the unused portion. The interest rate spreads and the facility fee are subject to increase or decrease depending on the Company's leverage ratio.
The Credit Facility is secured by the unlimited guaranty of our direct and indirect material U.S. subsidiaries and the pledge of 100% of the equity interests of our direct and indirect material foreign subsidiaries. The financial covenants of the Credit Facility include a leverage ratio and an interest coverage ratio. As of September 30, 2021, we were in compliance with all covenants.
At September 30, 2021, we had approximately $337 million available to borrow under the Credit Facility, plus the $250 million increase option subject to the lenders’ consent, in addition to $56.2 million cash on hand. We classified $20 million as the current portion of long-term debt as of September 30, 2021, as we intend to repay this amount within the next twelve months; however, we have no contractual obligation to repay such amount during the next twelve months.
During 2021 and 2020, our maximum aggregate short-term borrowings at any month-end were $174 million and $281 million, respectively, and the average aggregate short-term borrowings outstanding based on month-end balances were $71.3 million and $175.6 million, respectively. The weighted average interest rates were 1.20%, 3.20% and 3.21% for 2021, 2020 and 2019, respectively. As of September 30, 2021, the interest rate on our debt was 1.06%. The letters of credit issued and outstanding under the Credit Facility totaled $8.5 million and $9.9 million at September 30, 2021 and 2020, respectively.
9. Capital Stock
The 30,666,173 and 30,645,625 common shares as presented in the accompanying Consolidated Balance Sheets at September 30, 2021 and 2020 represent the actual number of shares issued at the respective dates. We held 4,604,741and 4,607,911 common shares in treasury at September 30, 2021 and 2020, respectively.
In August 2012, our Board of Directors approved a common stock repurchase program authorizing us to repurchase shares of our stock from time to time in Management’s discretion, in the open market or otherwise, up to a maximum total repurchase amount of $100 million (or the maximum amount permitted under our bank credit agreements, if less). After being repeatedly extended by the Company’s Board of Directors, this program expired September 30, 2021.
In August 2021, our Board of Directors approved a new common stock repurchase program authorizing us to repurchase shares of our stock from time to time in Management’s discretion, in the open market or otherwise, up to a maximum total repurchase amount of $200 million (or the maximum amount permitted under our bank credit agreements, if less). This program is scheduled to expire September 30, 2024. We did not repurchase any shares in 2021, 2020, or 2019.
10. Share-Based Compensation
We provide compensation benefits to certain key employees under several share-based plans providing for performance-accelerated and/or time-vested restricted stock unit awards, and to non-employee directors under a separate compensation plan for non-employee directors. As of September 30, 2021, our equity compensation plans had a total of 712,092 shares authorized and available for future issuance.
Performance-Accelerated Restricted Stock Unit (PARS) Awards and Time-Vested Restricted Stock Unit (RSU) Awards
A PARS award represents the right to receive a specified number of shares of Company common stock if and when the award vests. A PARS award is not stock and does not give the recipient any rights as a shareholder until it vests and is paid out in shares of stock. PARS awards currently outstanding have a five-year vesting period, with accelerated vesting if certain targets based on market conditions are achieved. In these cases, if it is probable that the performance condition will be met, the Company recognizes compensation cost on a straight-line basis over the shorter performance period; otherwise, it will recognize compensation cost over the longer service period. Compensation cost for the outstanding PARS awards is being recognized over the shorter performance period, as it is probable the performance condition will be met. The PARS award grants were valued at the stock price on the date of grant.
The terms of the RSU awards are similar to those of the PARS awards, but without any provision for acceleration of the vesting date. Each RSU represents the right to receive one share of Company common stock if the recipient remains continuously employed by the