(In thousands)	Maturity Dates	March 31, 2020		December 31, 2019
Unsecured private placement notes
3.95% (net of unamortized debt issuance cost of $305 and $316 for 2020 and 2019, respectively)	2021-2027	$	99,695	$	99,684
3.86% (net of unamortized debt issuance cost of $278 and $291 for 2020 and 2019, respectively)	2020-2025		85,436		85,423
4.86% (net of unamortized debt issuance cost of $137 and $147 for 2020 and 2019, respectively)	2020-2023		37,006		36,996
Total debt		$	222,137	$	222,103
Less current maturities			23,571		23,571
Long-term debt		$	198,566	$	198,532

The Company has a committed $350,000,000 multi-currency revolving credit agreement that expires on January 30, 2023. The Company maintains standby letters of credit under its workers’ compensation insurance agreements and for other purposes, as needed from time to time, which are issued under the revolving credit agreement. As of March 31, 2020, the Company had outstanding letters of credit totaling $4,929,000 and no borrowings under the revolving credit agreement. There was $345,071,000 available under the revolving credit agreement as of March 31, 2020.

The Company’s loan agreements contain provisions which, among others, require maintenance of certain financial ratios and place limitations on additional debt, investments and payment of dividends. Based on the loan agreement provisions that place limitations on dividend payments, unrestricted retained earnings (i.e., retained earnings available for dividend distribution) were $298,207,000 and $283,956,000 at March 31, 2020 and December 31, 2019, respectively.