	June 30,		December 31,
	2019		2018
Loan Agreement	$	—	$	—
4.67% Senior Unsecured Notes due 2021		40,000		40,000
5.25% Senior Unsecured Notes due 2024		11,000		11,000
5.30% Senior Unsecured Notes due 2024		15,000		15,000
5.45% Senior Unsecured Notes due 2026		12,000		12,000
		78,000		78,000
Less unamortized deferred financing costs		1,017		1,210
	$	76,983	$	76,790

In March 2017, the Company entered into a Fifth Amended and Restated Loan Agreement (the “Loan Agreement”). The Loan Agreement replaced the pre-existing $300 million senior revolving credit facility with a $200 million facility and extended the term from December 2018 to March 2022. The Company also holds Senior Unsecured Notes (“Notes”), which range in face value from $11 million to $40 million, with interest rates ranging from 4.67% to 5.45%, payable semiannually, and maturing between 2021 and 2026. At June 30, 2019, $78 million of the Notes were outstanding.

Under the terms of the Loan Agreement, the Company may borrow up to $200 million, reduced for letters of credit issued. As of June 30, 2019, the Company had $194.2 million available under the Loan Agreement. The Company had $5.8 million of letters of credit issued related to insurance and other contracts requiring financial assurance in the ordinary course of business at June 30, 2019. Borrowings under the Loan Agreement bear interest at the LIBOR rate, prime rate, federal funds effective rate, the Canadian deposit offered rate, or the euro currency reference rate depending on the type of loan requested by the Company, plus the applicable margin as set forth in the Loan Agreement.

The weighted average interest rate on borrowings under the Company’s long-term debt was 6.27% and 5.82% for the quarters ended June 30, 2019 and 2018, respectively, and 6.25% and 5.55% for the six months ended June 30, 2019 and 2018, respectively, which includes a quarterly facility fee on the used and unused portion, as well as amortization of deferred financing costs.

As of June 30, 2019, the Company was in compliance with all of its debt covenants associated with its Loan Agreement and Notes. The most restrictive financial covenants for all of the Company’s debt are an interest coverage ratio (defined as earnings before interest, taxes, depreciation and amortization, as adjusted, divided by interest expense) and a leverage ratio (defined as total debt divided by earnings before interest, taxes, depreciation and amortization, as adjusted).