Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2017

Long-Term Debt

Schedule of long-term debt

Long‑term debt consisted of the following as of December 31, 2017 and 2016 (in thousands):

	December 31,		December 31,
	2017		2016
Notes payable to banks, due in semi-annual installments, variable interest based on LIBOR, or with interest rates ranging from 2.91% to 3.43% through  2020, secured by aircraft	$	34,905	$	63,408
Notes payable to a financing company, due in semi-annual installments, variable interest based on LIBOR, or with interest rates ranging from 2.85% to 3.25% through 2021, secured by aircraft		97,612		146,266
Notes payable to banks, due in semi-annual installments plus interest at 6.06% to 6.51% through 2021, secured by aircraft		63,090		86,052
Notes payable to a financing company, due in semi-annual installments plus interest at 5.78% to 6.23% through 2017, secured by aircraft		—		8,854
Notes payable to banks, due in monthly installments plus interest of 2.68% to 6.86% through 2025, secured by aircraft		372,157		426,389
Notes payable to banks, due in monthly installments, plus interest at 4.16% to 6.05% through 2029, secured by aircraft		49,001		8,998
Notes payable to banks, due in monthly installments, plus interest at 3.44% through 2019, secured by aircraft		—		3,280
Notes payable to banks, due in quarterly installments, plus interest at 3.39% to 4.73% through 2029, secured by aircraft		2,085,822		1,806,981
Notes payable to banks, due in monthly installments, plus interest based on LIBOR at 3.54% through 2017, secured by aircraft		—		4,666
Notes payable to banks due in monthly installments, interest at 3.30% through 2019, secured by spare engines		9,763		16,010
Long-term debt	$	2,712,350	$	2,570,904
Current portion of long-term debt		(313,243)		(308,945)
Less long-term portion of unamortized debt issue cost, net		(21,761)		(21,908)
Long-term debt, net of current maturities and debt issue costs	$	2,377,346	$	2,240,051
Current portion of long-term debt		313,243		308,945
Less current portion of unamortized debt issue cost, net		(3,565)		(3,485)
Current portion of long-term debt, net of debt issue costs	$	309,678	$	305,460

Schedule of maturities of long-term debt

The aggregate amounts of principal maturities of long‑term debt as of December 31, 2017 were as follows (in thousands):

2018	$	313,243
2019		315,753
2020		284,998
2021		272,470
2022		280,360
Thereafter		1,245,526
	$	2,712,350