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Debt Obligations (Tables) | 12 Months Ended
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Dec. 31, 2017
Debt Obligations |
Schedule of notes payable |
|  | As of December 31, |
|  | 2017 |  | 2016 |
|  | (in thousands) |
Credit facility at a floating rate of interest of one-month LIBOR plus 1.50% at December 31, 2017, secured by engines. The facility has a committed amount of $890.0 million at December 31, 2017, which revolves until the maturity date of April 2021 |  | $ | 491,000 |  | $ | 608,000 |
WEST III Series A 2017-1 term notes payable at a fixed rate of interest of 4.69%, maturing in August 2042, secured by engines |  |  | 289,295 |  |  | — |
WEST III Series B 2017-1 term notes payable at a fixed rate of interest of 6.36%, maturing in August 2042, secured by engines |  |  | 41,370 |  |  | — |
WEST II Series 2012-A term notes payable at a fixed rate of interest of 5.50%, maturing in September 2037, secured by engines |  |  | 259,022 |  |  | 279,541 |
Note payable at fixed interest rates ranging from 2.60% to 2.97%, maturing in July 2024, secured by an aircraft |  |  | 12,720 |  |  | 14,453 |
Note payable at a variable interest rate of one-month LIBOR plus 2.25%, maturing in January 2018, secured by engines |  |  | 10,336 |  |  | 11,709 |
|  |  | 1,103,743 |  |  | 913,703 |
Less: unamortized debt issuance costs |  |  | (18,338) |  |  | (13,448) |
Total debt obligations |  | $ | 1,085,405 |  | $ | 900,255 |
Schedule or principal outstanding |
Year |  | (in thousands) |
2018 |  | $ | 48,401 |
2019 |  |  | 38,537 |
2020 |  |  | 38,137 |
2021 (includes $491.0 million outstanding on revolving credit facility) |  |  | 529,374 |
2022 |  |  | 190,889 |
Thereafter |  |  | 258,405 |
|  | $ | 1,103,743 |

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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=64930739&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=64930785&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=64930785&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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