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Long-term Debt (Tables) | 12 Months Ended
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Dec. 31, 2015
Long-term Debt |
Schedule of long-term debt | Long‑term debt consisted of the following as of December 31, 2015 and 2014 (in thousands):
|  | December 31, |  | December 31, |
|  | 2015 |  | 2014 |
Notes payable to banks, due in semi-annual installments, variable interest based on LIBOR, or with interest rates ranging from 1.29% to 2.22% through 2016 to 2020, secured by aircraft |  | $ | 108,348 |  | $ | 174,159 |
Notes payable to a financing company, due in semi-annual installments, variable interest based on LIBOR, or with interest rates ranging from 1.76% to 3.25% through 2017 to 2021, secured by aircraft |  |  | 217,341 |  |  | 350,177 |
Notes payable to banks, due in semi-annual installments plus interest at 6.06% to 6.51% through 2021, secured by aircraft |  |  | 108,069 |  |  | 129,201 |
Notes payable to a financing company, due in semi-annual installments plus interest at 5.78% to 6.23% through 2017, secured by aircraft |  |  | 17,208 |  |  | 25,090 |
Notes payable to banks, due in monthly installments plus interest of 2.68% to 6.86% through 2025, secured by aircraft |  |  | 479,170 |  |  | 572,446 |
Notes payable to banks, due in monthly installments, plus interest at 6.05% through 2020, secured by aircraft |  |  | 11,304 |  |  | 13,551 |
Notes payable to banks, due in monthly installments, plus interest at 3.10% through 2019, secured by aircraft |  |  | 4,615 |  |  | 5,909 |
Notes payable to banks, due in quarterly installments plus interest at 3.39% to 4.02% through 2027, secured by aircraft |  |  | 966,156 |  |  | 446,724 |
Notes payable to banks, due in monthly installments, plus interest based on LIBOR at 3.21% to 3.33% through 2017, secured by aircraft |  |  | 14,538 |  |  | 28,554 |
Notes payable to banks due in monthly installments, interest at 3.30% through 2019, secured by spare engines |  |  | 22,054 |  |  | — |
Long-term debt |  | $ | 1,948,803 |  | $ | 1,745,811 |
Less current maturities |  |  | (272,027) |  |  | (211,821) |
Long-term debt, net of current maturities |  | $ | 1,676,776 |  | $ | 1,533,990 |
Schedule of maturities of long-term debt | The aggregate amounts of principal maturities of long‑term debt as of December 31, 2015 were as follows (in thousands):
2016 |  | $ | 272,027 |
2017 |  |  | 248,629 |
2018 |  |  | 230,681 |
2019 |  |  | 223,898 |
2020 |  |  | 183,620 |
Thereafter |  |  | 789,948 |
|  | $ | 1,948,803 |

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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