Long-term Debt (Tables)

12 Months Ended

Dec. 31, 2014

Long-term Debt

Schedule of long-term debt

Long-term debt consisted of the following as of December 31, 2014 and 2013 (in thousands):

	December 31, 2014			December 31, 2013
Notes payable to banks, due in semi-annual installments, variable interest based on LIBOR, or with interest rates ranging from 1.34% to 2.55% through 2015 to 2020, secured by aircraft	$	174,159		$	224,915
Notes payable to a financing company, due in semi-annual installments, variable interest based on LIBOR, or with interest rates ranging from 0.70% to 2.36% through 2015 to 2021, secured by aircraft		350,177			392,660
Notes payable to banks, due in semi-annual installments plus interest at 6.06% to 7.18% through 2021, secured by aircraft		129,201			149,477
Notes payable to a financing company, due in semi-annual installments plus interest at 5.78% to 6.23% through 2019, secured by aircraft		25,090			32,528
Notes payable to banks, due in monthly installments plus interest of 3.15% to 8.18% through 2025, secured by aircraft		572,446			623,315
Notes payable to banks, due in semi-annual installments, plus interest at 6.05% through 2020, secured by aircraft		13,551			15,740
Notes payable to banks, due in monthly installments, plus interest at 3.10% through 2019, secured by aircraft		5,909			—
Notes payable to banks, due in quarterly installments, LIBOR plus interest at 2.39% through 2029, secured by aircraft		378,406			—
Notes payable to banks, due in quarterly installments, plus interest at 3.8% to 4.0% through 2029, secured by aircraft		68,318			—
Notes payable to banks, due in monthly installments, interest based on LIBOR plus interest at 2.00% to 4.00% through 2016		28,554			31,933
Long-term debt	$	1,745,811		$	1,470,568
Less current maturities		(211,821	)		(177,389	)
Long-term debt, net of current maturities	$	1,533,990		$	1,293,179

Schedule of maturities of long-term debt

The aggregate amounts of principal maturities of long-term debt as of December 31, 2014 were as follows (in thousands):

2015	$	211,821
2016		216,340
2017		190,648
2018		168,769
2019		161,329
Thereafter		796,904
	$	1,745,811