Debt

Long-term debt was comprised of the following:



	As of
	September 30,			December 31,
	2018			2017
Total credit facility	$	300,000		$	300,000
Balance outstanding	$	50,000		$	76,300
Standby letters of credit	$	1,940		$	2,065
Amount available	$	248,060		$	221,635
Weighted-average interest rate	3.10		%	2.30		%
Commitment fee percentage per annum	0.20		%	0.25		%

On August 10, 2015, we entered into a five-year credit agreement (“Revolving Credit Facility”) with a group of banks in order to support our financing needs. The Revolving Credit Facility originally provided for a credit line of $200,000. On May 23, 2016, we requested and received a $100,000 increase in the aggregate revolving credit commitments under the existing credit agreement, which increased the credit line from $200,000 to $300,000.

The Revolving Credit Facility includes a swing line sublimit of $15,000 and a letter of credit sublimit of $10,000. Borrowings under the Revolving Credit Facility bear interest, at our option, at the base rate plus the applicable margin for base rate loans or London Interbank Offered Rate ("LIBOR") plus the applicable margin for LIBOR loans. We also pay a quarterly commitment fee on the unused portion of the Revolving Credit Facility. The commitment fee ranges from 0.20% to 0.40% based on the our total leverage ratio.

The Revolving Credit Facility requires, among other things, that we comply with a maximum total leverage ratio and a minimum fixed charge coverage ratio. Failure to comply with these covenants could reduce the borrowing availability under the Revolving Credit Facility. We were in compliance with all debt covenants at September 30, 2018. The Revolving Credit Facility requires that we deliver quarterly financial statements, annual financial statements, auditor certifications, and compliance certificates within a specified number of days after the end of a quarter and year. Additionally, the Revolving Credit Facility contains restrictions limiting our ability to: dispose of assets; incur certain additional debt; repay other debt or amend subordinated debt instruments; create liens on assets; make investments, loans or advances; make acquisitions or engage in mergers or consolidations; engage in certain transactions with our subsidiaries and affiliates; and make stock repurchases and dividend payments. Interest rates on the Revolving Credit Facility fluctuate based upon the LIBOR and the Company’s quarterly total leverage ratio.

We have debt issuance costs related to our long-term debt that are being amortized using the straight-line method over the life of the debt. These costs are included in interest expense in our Condensed Consolidated Statement of Earnings. Amortization expense was approximately $46 for both the three months ended September 30, 2018 and September 30, 2017, respectively, and approximately $139 for both the nine months ended September 30, 2018 and September 30, 2017, respectively.