At September 30, 2019 and December 31, 2018, debt consisted of the following (in thousands):

	September 30, 2019		December 31, 2018
Credit Agreement with Banks, described below	$	70,005	$	20,000
Finance Leases, described below		95,260		102,859
Total debt		165,265		122,859
Less: current portion of long-term debt		19,245		18,082
Long-term debt, less current portion	$	146,020	$	104,777

The Company’s liquidity needs arise primarily from capital investment in new equipment, land and structures, information technology and letters of credit required under insurance programs, as well as funding working capital requirements.

The Company is party to a revolving credit agreement with a group of banks to fund capital investments, letters of credit and working capital needs.

The Fifth Amended and Restated Credit Agreement, dated March 6, 2015 (the Restated Credit Agreement), was a revolving credit facility for up to $250 million expiring in March 2020. The Restated Credit Agreement also had an accordion feature that allowed for an additional $75 million availability, subject to lender approval. The Restated Credit Agreement provided for a LIBOR rate margin range from 112.5 basis points to 225 basis points, base rate margins from minus 12.5 basis points to plus 50 basis points, an unused portion fee from 20 basis points to 30 basis points and letter of credit fees from 112.5 basis points to 225 basis points, in each case based on the Company’s leverage ratio. Under the Restated Credit Agreement, the Company was required to maintain certain financial covenants including a minimum fixed charge coverage ratio and a maximum leverage ratio, among others. The Restated Credit Agreement also provided for a pledge by the Company of certain land and structures, certain tractors, trailers and other personal property and accounts receivable, to secure indebtedness under the Restated Credit Agreement.

On February 5, 2019, the Company entered into the Sixth Amended and Restated Credit Agreement with its banking group (as amended, the Amended Credit Agreement). The amendment increased the amount of the revolver from $250 million to $300 million and extended the term until February 2024. The Amended Credit Agreement also has an accordion feature that allows for an additional $100 million availability, subject to lender approval. The amendment reduced the interest rate pricing grid compared to the Restated Credit Agreement. The Amended Credit Agreement provides for a LIBOR rate margin range from 100 basis points to 200 basis points, base rate margins from minus 50 basis points to plus 50 basis points, an unused portion fee from 17.5 basis points to 30 basis points and letter of credit fees from 100 basis points to 200 basis points, in each case based on the Company’s leverage ratio. Under the Amended Credit Agreement, the Company must maintain a minimum debt service coverage ratio set at 1.25 to 1.00 and a maximum leverage ratio set at 3.25 to 1.00. The Amended Credit Agreement provides for a pledge by the Company of certain land and structures, accounts receivable and other assets to secure indebtedness under this agreement. The Amended Credit Agreement contains certain customary representations and warranties, affirmative and negative covenants and provisions relating to events of default. Under the Amended Credit Agreement, if an event of default occurs, the banks will be entitled to take various actions, including the acceleration of amounts due.

At September 30, 2019, the Company had borrowings of $70.0 million and outstanding letters of credit of $26.1 million under the Amended Credit Agreement. At December 31, 2018, the Company had borrowings of $20.0 million and outstanding letters of credit of $27.7 million under the Restated Credit Agreement. The available portion of the Amended Credit Agreement may be used for general corporate purposes, including capital expenditures, working capital and letter of credit requirements as needed.

The Company is obligated under finance leases with seven-year terms covering revenue equipment totaling $95.3 million and $102.9 million as of September 30, 2019 and December 31, 2018, respectively. Amortization of assets held under the finance leases is included in depreciation and amortization expense. The weighted average interest rates for the finance leases at September 30, 2019 and December 31, 2018 were 3.4 percent.

The principal maturities of long-term debt, including interest on finance leases, for the next five years (in thousands) are as follows:

	Amount
2019	$	5,558
2020		22,230
2021		22,756
2022		21,020
2023		15,441
Thereafter		87,039
Total		174,044
Less: Amounts Representing Interest on Finance Leases		8,779
Total	$	165,265