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Revenue Recognition (Tables) | 3 Months Ended
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Mar. 31, 2020
Revenue Recognition [Abstract] |
Disaggregation of Revenue [Table Text Block] | Passenger revenue is primarily composed of scheduled service revenue (including passenger ticket sales and credit voucher breakage), revenue from ancillary air-related charges (including seat fees, baggage fees, and other travel-related services performed in conjunction with a passenger’s flight), as well as co-brand credit card point redemptions, as outlined below:
| Three Months Ended March 31,
(in thousands) | 2020 |  | 2019
Scheduled service | $ | 197,261 |  |  | $ | 234,772 |
Ancillary air-related charges | 176,964 |  |  | 181,700 |
Co-brand redemptions | 4,686 |  |  | 3,505 |
Total passenger revenue | $ | 378,911 |  |  | $ | 419,977 |
Contract with Customer, Asset and Liability [Table Text Block] | The following table presents the activity of the co-brand point liability as of the dates indicated:
| Three Months Ended March 31,
(in thousands) | 2020 |  | 2019
Balance at January 1 | $ | 15,613 |  |  | $ | 10,708 |
Points awarded (deferral of revenue) | 6,354 |  |  | 4,164 |
Points redeemed (recognition of revenue) | (4,686 | ) |  | (3,505 | )
Balance at March 31 | $ | 17,281 |  |  | $ | 11,367 |

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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