Note 8 — Long-Term Debt

Long-term debt consisted of the following as of September 30, 2018 and December 31, 2017 (in thousands):


	September 30, 2018		December 31, 2017
Current portion of long-term debt	$	361,131	$	313,243
Current portion of unamortized debt issue cost, net		(3,804)		(3,565)
Current portion of long-term debt, net of debt issue costs	$	357,327	$	309,678

Long-term debt, net of current maturities	$	2,773,637	$	2,399,107
Long-term portion of unamortized debt issue cost, net		(21,915)		(21,761)
Long-term debt, net of current maturities and debt issue costs	$	2,751,722	$	2,377,346

Total long-term debt (including current portion)	$	3,134,768	$	2,712,350
Total unamortized debt issue cost, net		(25,719)		(25,326)
Total long-term debt, net of debt issue costs	$	3,109,049	$	2,687,024

During the nine months ended September 30, 2018, the Company took delivery of 31 E175 aircraft and purchased nine previously-leased aircraft, which the Company financed through $626.2 million of long-term debt. The debt associated with the 31 E175 aircraft has a 12-year term, is due in quarterly installments with a fixed annual interest rate ranging from 4.6% to 5.0% and is secured by the E175 aircraft. The Company acquired nine aircraft off a lease during the nine months ended September 30, 2018. The debt associated with the nine previously-leased aircraft has a term ranging from three to four years, is due in semi-annual installments with a fixed annual interest rate of 6.45% and is secured by the previously-leased aircraft.

As of September 30, 2018 and December 31, 2017, the Company had $84.8 million and $87.4 million, respectively, in letters of credit and surety bonds outstanding with various banks and surety institutions.