13.

DEBT

At March 31, 2018, and December 31, 2017, debt comprised the following:

(In thousands)	Maturity Dates	March 31, 2018		December 31, 2017
Unsecured private placement notes
3.95% (net of unamortized debt issuance cost of $392 and $346 for 2018 and 2017, respectively)	2021-2027	$	99,608	$	99,654
3.86% (net of unamortized debt issuance cost of $388 and $343 for 2018 and 2017, respectively)	2019-2025		99,612		99,657
4.86% (net of unamortized debt issuance cost of $215 and $191 for 2018 and 2017, respectively)	2018-2023		55,499		55,523
5.88% (net of unamortized debt issuance cost of $106 and $95 for 2018 and 2017, respectively)	2018-2022		28,465		28,476
5.69% (net of unamortized debt issuance cost of $12 for 2018 and 2017)	2018		5,703		5,703
Debt of foreign subsidiaries
Unsecured bank debt, foreign currency	2018		1,926		1,786
Total debt		$	290,813	$	290,799
Less current maturities			22,640		22,500
Long-term debt		$	268,173	$	268,299

On January 30, 2018, the Company entered into a five year committed $350 million multi-currency revolving credit facility that matures on January 30, 2023 with a syndicate of banks. This credit facility replaced the Company’s prior $125 million credit agreement. The Company’s outstanding Note Purchase Agreements were amended effective January 30, 2018 to make certain covenants consistent with those included in the credit agreement. 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, 2018, the Company had outstanding letters of credit totaling $4,927,000 and no outstanding debt under this agreement. There was $345,073,000 available under the revolving credit agreement as of March 31, 2018.

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 $136,167,000 and $190,495,000 at March 31, 2018 and December 31, 2017, respectively.