LIBOR (plus 1 percent), at our option. The applicable margin is adjusted quarterly based on our leverage ratio. At June 30, 2019, the applicable margin was 2.50 percent for LIBOR loans and 1.50 percent for base rate loans.
Interest on the Term Loan B is accrued similarly to Term Loan A, except the applicable margin is fixed at 4.50 percent for LIBOR loans and 3.50 percent for base rate loans. The Term Loan A and Term Loan B interest rates were 4.66 percent and 6.91 percent, respectively, at June 30, 2019 and 4.78 percent and 7.03 percent, respectively, at December 31, 2018. The interest rate on the revolving line of credit was 4.74 percent and 5.19 percent at June 30, 2019 and December 31, 2018, respectively. We are charged a monthly unused commitment fee ranging from 0.3 percent to 0.4 percent on the average unused daily balance on our $250,000 revolving line of credit.
Our weighted average borrowings on the revolving line of credit was $130,573 and $152,229 and maximum borrowings on the revolving line of credit was $157,000 and $188,250 during the three months ended June 30, 2019 and 2018, respectively. We had $125,000 and $73,700 available to borrow on our revolving line of credit at June 30, 2019 and December 31, 2018, respectively. We had $458,750 and $464,500 in outstanding term loans as of June 30, 2019 and December 31, 2018, respectively. We also had $125,000 and $176,300 outstanding on our revolving line of credit as of June 30, 2019 and December 31, 2018, respectively.
The Term Loan A and Term Loan B requires quarterly principal payments of $1,875 and $1,000, plus accrued interest, respectively. During 2018, the Company made a voluntary prepayment of $74,000 on the Term Loan B.
Our credit facility contains certain financial and non-financial covenants. We were in compliance with all such covenants as of June 30, 2019. On July 19, 2019, the Company agreed to a First Amendment to Credit Agreement with JP Morgan Cash Bank, N.A. and Capital One, National Association. Effective August 6, 2019, this First Amendment to Credit Agreement amended and restated our covenants for the total net leverage ratio and the interest coverage ratio beginning on September 30, 2019 through December 31, 2020 as well as permanently reducing our revolving line of credit from $250,000 to $200,000.
Critical Accounting Policies and Estimates
Our Condensed Consolidated Financial Statements have been prepared in accordance with U.S. GAAP. Application of these principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the Condensed Consolidated Financial Statements, and the reported amounts of revenue and expenses. In accordance with U.S. GAAP, we base our estimates on historical experience and on various other assumptions that management believes are reasonable under the circumstances. Actual results might differ from these estimates under different assumptions or conditions and, to the extent that there are differences between our estimates and actual results, our future financial statement presentation, financial condition, results of operations and cash flows will be affected.
During the six months ended June 30, 2019, there were no significant changes to our critical accounting policies and use of estimates, which are disclosed in our “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in our Annual Report on Form 10-K for the year ended December 31, 2018.
Recently Issued Accounting Guidance
Refer to Note 2, New Accounting Standards, to our unaudited Condensed Consolidated Financial Statements included in Item 1. Financial Statements, for a discussion of recently issued accounting guidance and related impact on our financial condition and results of operations.
ITEM 3. QUALITATIVE AND QUANTITATIVE DISCLOSURES ABOUT MARKET RISK
Our operations are solely in the United States of America (“U.S.”) and U.S. Territories and are exposed to market risks in the ordinary course of our business, which consists of interest rate risk. We are exposed to interest rate fluctuations with regard to future issuances of fixed-rate debt, and existing and future issuances of floating-rate debt. Primary exposures include the LIBOR, the Federal Funds Effective Rate, the Overnight Bank Funding Rate and our administrative agent’s