Long-term Debt (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

Total long-term debt consists of the following (in millions):

	December 31,
	2019		2018
Amounts borrowed (Credit Facility)	$	324.8	$	320.0
Obligations under finance leases	57.3		26.2
Total long-term debt	$	382.1	$	346.2

Amounts related to the Credit Facility are as follows (in millions, except interest rate data):

	December 31,
	2019			2018
Amounts borrowed, net	$	324.8		$	320.0
Outstanding letters of credit	16.7			16.7
Amounts available to borrow(1)	341.7			328.9
Average borrowings	303.2			336.8
Range of borrowings	141.7 - 508.0			175.0 - 575.0
Unamortized debt issuance costs	1.7			2.5
Weighted-average interest rate(2)	3.4		%	3.1		%

______________________________________________

(1) Subject to borrowing base limitations, and excluding expansion feature of $200.0 million.

(2) Calculated based on the daily cost of borrowing, reflecting a blend of prime and LIBOR rates.

Long-term debt fees and charges were as follows (in millions):

	December 31,
	2019		2018		2017
Unused credit facility and letter of credit participation(1)	$	1.2	$	1.2	$	1.0
Amortization of debt issuance costs(1)	0.8		0.8		0.8

______________________________________________

(1)

Included in interest expense, net.