Debt

12 Months Ended

Dec. 31, 2020

Long-term debt consisted of the following (in thousands):


	December 31,
	2020		2019
Bank credit facility - term loan	$	77,988	$	120,800
Bank credit facility - revolver loans	175,473		152,000
Principal amount of long-term debt	253,461		272,800
Less debt issuance costs	(2,368)		(2,789)
Total long-term debt	251,093		270,011
Less current portion	(20,379)		(16,883)
Long-term debt, net of current portion	$	230,714	$	253,128

We have a loan agreement with a group of banks that expires in January 2023. We borrow under the loan agreement to provide working capital support, fund letters of credit and finance acquisitions. The loan agreement includes term and revolving facilities. In June 2020, we amended the loan agreement to provide increased covenant flexibility in response to changes in financial operating performance resulting from the COVID-19 pandemic. Financing costs associated with the loan agreement amendment of approximately $636 thousand were capitalized and are being amortized over the remaining term of the loan. The fair value of outstanding debt as of December 31, 2020 under our bank loan facilities approximates its carrying value using Level 2 inputs based on market data on companies with a corporate rating similar to ours that have recently priced credit facilities.

Our required term and revolver loan payments after December 31, 2020 are as follows (in thousands):


Year ending December 31,
2021	$	21,563
2022	22,500
2023*	209,398

Total	$	253,461

*Includes the revolver loan required payment of $175.5 million.

The maximum amount of credit available under the loan agreement for revolving loans and letters of credit as of December 31, 2020 was $350 million. We pay an unused commitment fee and fees on letters of credit that are issued. We had no letters of credit outstanding as of December 31, 2020 and approximately $54 thousand of letters of credit outstanding as of December 31, 2019.

Under the loan agreement we may elect to increase the maximum availability of the term loan facility, the revolving loan facility, or both facilities up to an aggregate additional amount of $100 million.

We pay interest on the term loan borrowings and revolving loan borrowings at LIBOR plus a base margin or at a base rate (typically the prime rate) plus a base margin. As of December 31, 2020, the LIBOR base margin was 3.00% and the base rate

base margin was 1.75%. The base margins increase or decrease in increments as our Total Funded Debt/EBITDA Ratio increases or decreases.

The loan agreement requires us to have interest rate hedges on a portion of the outstanding term loan until February 6, 2021. We have executed compliant interest rate hedges. The amount of our debt with interest rate swap agreements was $145.0 million as of December 31, 2020. After taking into account the impact of hedging instruments, as of December 31, 2020 interest rates on portions of our outstanding debt ranged from 3.75% to 6.32%, and the effective interest rate on our aggregate outstanding debt was 4.80%.

Interest expense incurred on bank loan borrowings and interest rate hedges was approximately $12.7 million, $13.3 million and $6.9 million during the years ended December 31, 2020, 2019 and 2018, respectively.

The loan agreement contains collateral requirements to secure our loan agreement obligations, restrictive covenants, a limit on annual dividends, and other affirmative and negative covenants, conditions and limitations. Restrictive covenants include a maximum Total Funded Debt/EBITDA Ratio and a minimum Fixed Charge Coverage Ratio. We were in compliance with required ratios and other terms and conditions as of December 31, 2020. We continue to monitor the impacts of COVID-19 on our results of operations and liquidity relative to compliance with financial covenants; at this time, we expect that we will remain in compliance with such covenants over the next twelve months.