Debt obligations consist of the following (in thousands):


	December 31,
	2024		2023
Revolving credit facility	$	—	$	—
Notes to former owners		67,593		44,070
Other debt		742		142
Total debt		68,335		44,212
Less—current portion		(6,042)		(4,867)
Total long-term portion of debt	$	62,293	$	39,345


	Year Ended December 31,
	2024		2023		2022
Interest expense on notes to former owners	$	3,616	$	1,365	$	1,139
Interest expense on borrowings and unused commitment fees		1,434		7,507		10,955
Interest expense (income) on interest rate swaps		—		—		(332)
Interest expense on finance leases		—		—		4
Letter of credit fees		911		724		800
Amortization of debt financing costs		687		685		786
Total	$	6,648	$	10,281	$	13,352


	Net Leverage Ratio
	Less than 1.00		1.00 to less than 1.75		1.75 to less than 2.50		2.50 to less than 3.00		3.00 or greater
Additional Per Annum Interest Margin Added Under:
Base Rate Loan Option	0.00	%	0.25	%	0.50	%	0.75	%	1.00	%
SOFR Loan Option	1.00	%	1.25	%	1.50	%	1.75	%	2.00	%
Letter of credit fees	1.00	%	1.25	%	1.50	%	1.75	%	2.00	%
Commitment fees on any portion of the Revolving Loan capacity not in use for borrowings or letters of credit at any given time	0.15	%	0.175	%	0.20	%	0.225	%	0.25	%

At December 31, 2024, future principal payments of notes to former owners by maturity year are as follows (dollars in thousands):