(In millions)	March 31, 2021			December 31, 2020
Current portion of finance lease	$	0.3		$	0.9
Current portion of debt		0.3			0.9
Senior unsecured credit facility		214.0			228.0
4.7% senior notes --- due 2025		300.0			300.0
3.95% senior notes --- due 2027		400.0			400.0
Senior notes --- original issue discount		(1.4	)		(1.5	)
Senior notes --- deferred financing costs		(3.4	)		(3.5	)
Non-current portion of finance lease and other debt		2.8			2.5
Long-term debt		912.0			925.5
Total debt	$	912.3		$	926.4

In June 2019, the Company refinanced its senior unsecured credit facility (the “Facility”), increasing borrowing capacity from $700 million to $1 billion. The Facility matures in June 2024. The interest rate ranges from LIBOR + 0.875% to a maximum of LIBOR + 1.50%, depending upon the better of the Company’s leverage ratio or the credit rating. The Facility agreement contains financial and other covenants, including, but not limited to customary restrictions on the incurrence of debt by our subsidiaries and the granting of liens, as well as the maintenance of an interest coverage ratio and a leverage ratio.

In September 2020, we amended the Facility to allow for relief from certain terms, including adjusting the maximum leverage ratio covenant for a defined period. On January 28, 2021, we further amended the Facility agreement (the “Second Amendment”), to provide that, from January 28, 2021 through and including March 31, 2022, we will not be subject to a maximum leverage ratio covenant but will instead be required to maintain Liquidity (as defined in the Facility Agreement) of at least $250 million. Additionally, during such period, the Company will be subject to limitations on share repurchases, cash dividends, and its ability to incur secured debt, in each case subject to certain exceptions; the applicable margin and commitment fees are increased; the incremental facility will not be available; and if the Company’s public debt rating is downgraded to (i) BB or lower by Standard & Poor’s and (ii) Ba2 or lower by Moody’s, we will be required to grant liens on certain of our assets, which liens will be released upon the Company’s public debt rating being upgraded to BB+ or higher by Standard & Poor’s or Ba1 or higher by Moody’s. The Company’s public debt rating as of March 31, 2021 is BB+/Baa3. In addition, the Second Amendment provides that the Company will not be subject to an interest coverage ratio covenant until the test period ending December 31, 2021 and revolving commitments under the Facility were reduced to $750 million. In connection with the Second Amendment, we accelerated a portion of the deferred financing costs and recognized $0.9 million in interest expense during the first quarter of 2021. As of March 31, 2021, we were in compliance with all debt covenants.

As of March 31, 2021, total borrowings under the Facility were $214 million, which approximates fair value. The Facility agreement permits us to issue letters of credit up to an aggregate amount of $50 million. Outstanding letters of credit reduce the amount available for borrowing under the Facility. As of March 31, 2021, there were no issued letters of credit under the Facility, resulting in undrawn availability under the Facility of $536 million. The weighted average interest rate for the Facility was 3.99% for the three months ended March 31, 2021.

In 2017, the Company issued $400 million in aggregate principal amount of 3.95% Senior Unsecured Notes due in 2027. The interest rate on these senior notes may be increased 0.25% each time a credit rating applicable to the notes is downgraded. Conversely, such increases would be reversed should the credit rating be subsequently upgraded. The maximum rate is 5.95%. The effective interest rate for three months ended March 31, 2021 was 4.00% inclusive of approximately a 0.25% benefit of treasury locks. Based on quoted prices the fair value of the senior unsecured notes due in 2027 was $418.3 million at March 31, 2021.

In 2015, the Company issued $300 million in aggregate principal amount of 4.7% Senior Unsecured Notes due in 2025. The interest rate on these senior notes may be increased by 0.25% each time a credit rating applicable to the notes is downgraded. Conversely, such increases would be reversed should the credit rating be subsequently upgraded. The maximum rate is 6.7%. The effective interest rate for the three months ended March 31, 2021 was 4.95%. Based on quoted prices, the fair value of the senior unsecured notes due in 2025 was $326.6 million at March 31, 2021.