Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2017
Accounting Policies [Abstract]
Recently Adopted Accounting Pronouncements; Recently Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements In March 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, requiring an employer to report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. ASU 2017-07 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption only permitted in the first quarter of 2017. The Company early adopted this standard during the first quarter of 2017. The adoption of ASU 2017-07 resulted in a reclassification of $5.1 million and $10.2 million from wages and benefits to other components of net periodic benefit cost on the Company's consolidated statement of operations for the three and six months ended June 30, 2016, respectively. In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows, Restricted Cash, requiring restricted cash and restricted cash equivalents to be included with cash and cash equivalents on the statement of cash flows when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The guidance is effective for interim and annual periods beginning after December 15, 2017, with early adoption permitted. The Company early adopted this standard during the first quarter of 2017. Restricted cash is now included as a component of cash, cash equivalents, and restricted cash on the Company's condensed consolidated statement of cash flows. The inclusion of restricted cash increased the beginning and ending balances of the condensed consolidated statement of cash flows by $5.0 million for the six months ended June 30, 2016. In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, requiring all income tax effects of awards to be recognized in the income statement when the awards vest or are settled. ASU 2016-09 will also allow an employer to withhold more shares for tax withholding purposes without triggering liability accounting and to make a policy election to account for forfeitures as they occur. ASU 2016-09 is effective for annual reporting periods beginning after December 15, 2016. The Company adopted this standard during the first quarter of 2017. The primary impact of the adoption of the standard on the Company's consolidated financial statements was the recognition of excess tax benefits in the provision for income taxes rather than additional paid-in capital, which reduced income tax expense by $0.4 million and $5.6 million for the three and six months ended June 30, 2017, respectively. The Company also reclassified $17.3 million of excess tax benefits for share-based payments in the cash flow statement from financing activities to operating activities for the six months ended June 30, 2016. Recently Issued Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases, requiring a lessee to recognize in the statement of financial position a liability to make lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term. ASU 2016-02 is effective for annual reporting periods beginning after December 15, 2018. ASU 2016-02 requires entities to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. Full retrospective application is prohibited. The Company is currently evaluating the effect that the provisions of ASU 2016-02 will have on its consolidated financial statements and related disclosures. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, requiring an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU 2014-09 will replace most existing revenue recognition guidance in GAAP when it becomes effective. ASU 2014-09 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. The Company expects to use the full retrospective transition method at the date of adoption. The Company is currently evaluating the overall effect that the provisions of ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has reached conclusions on the applicability of the standard on accounting for contracts with customers and has determined that the new standard, once effective, will affect the Company's accounting policies regarding frequent flyer, ticket breakage, credit card fees, booking fees, and upgrade fee accounting. The standard will preclude the Company from applying the incremental cost method of accounting for free travel awards earned by passengers issued from the HawaiianMiles program through flight activity. The Company will instead be required to allocate consideration received between the ticket and miles earned by passengers and defer the value of the miles until redemption, resulting in a significant increase to the deferred revenue liability on the balance sheet. Passenger revenue is currently recognized for unflown tickets when tickets expire unused. Under the new standard, the Company expects to estimate tickets that will expire unused and recognize revenue at the ticketed flight date. Fees for changing itineraries are currently recognized when received. The Company expects to defer the recognition of these fees until the related transportation is provided. Amounts currently classified in other revenue (e.g. bag and other ancillary fees) will be reclassified to passenger revenue. The adoption of the standard will have a significant impact on the Company's financial statements. The Company is currently in the process of quantifying the effects of the new standard on the Company's financial statements.

Recently Adopted Accounting Pronouncements

In March 2017, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, requiring an employer to report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. ASU 2017-07 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017, with early adoption only permitted in the first quarter of 2017. The Company early adopted this standard during the first quarter of 2017. The adoption of ASU 2017-07 resulted in a reclassification of $5.1 million and $10.2 million from wages and benefits to other components of net periodic benefit cost on the Company's consolidated statement of operations for the three and six months ended June 30, 2016, respectively.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows, Restricted Cash, requiring restricted cash and restricted cash equivalents to be included with cash and cash equivalents on the statement of cash flows when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The guidance is effective for interim and annual periods beginning after December 15, 2017, with early adoption permitted. The Company early adopted this standard during the first quarter of 2017. Restricted cash is now included as a component of cash, cash equivalents, and restricted cash on the Company's condensed consolidated statement of cash flows. The inclusion of restricted cash increased the beginning and ending balances of the condensed consolidated statement of cash flows by $5.0 million for the six months ended June 30, 2016.

In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, requiring all income tax effects of awards to be recognized in the income statement when the awards vest or are settled. ASU 2016-09 will also allow an employer to withhold more shares for tax withholding purposes without triggering liability accounting and to make a policy election to account for forfeitures as they occur. ASU 2016-09 is effective for annual reporting periods beginning after December 15, 2016. The Company adopted this standard during the first quarter of 2017. The primary impact of the adoption of the standard on the Company's consolidated financial statements was the recognition of excess tax benefits in the provision for income taxes rather than additional paid-in capital, which reduced income tax expense by $0.4 million and $5.6 million for the three and six months ended June 30, 2017, respectively. The Company also reclassified $17.3 million of excess tax benefits for share-based payments in the cash flow statement from financing activities to operating activities for the six months ended June 30, 2016.

Recently Issued Accounting Pronouncements

In February 2016, the FASB issued ASU 2016-02, Leases, requiring a lessee to recognize in the statement of financial position a liability to make lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term. ASU 2016-02 is effective for annual reporting periods beginning after December 15, 2018. ASU 2016-02 requires entities to use a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements. Full retrospective application is prohibited. The Company is currently evaluating the effect that the provisions of ASU 2016-02 will have on its consolidated financial statements and related disclosures.

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers, requiring an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. ASU 2014-09 will replace most existing revenue recognition guidance in GAAP when it becomes effective. ASU 2014-09 is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. The Company expects to use the full retrospective transition method at the date of adoption.

The Company is currently evaluating the overall effect that the provisions of ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has reached conclusions on the applicability of the standard on accounting for contracts with customers and has determined that the new standard, once effective, will affect the Company's accounting policies regarding frequent flyer, ticket breakage, credit card fees, booking fees, and upgrade fee accounting. The standard will preclude the Company from applying the incremental cost method of accounting for free travel awards earned by passengers issued from the HawaiianMiles program through flight activity. The Company will instead be required to allocate consideration received between the ticket and miles earned by passengers and defer the value of the miles until redemption, resulting in a significant increase to the deferred revenue liability on the balance sheet. Passenger revenue is currently recognized for unflown tickets when tickets expire unused. Under the new standard, the Company expects to estimate tickets that will expire unused and recognize revenue at the ticketed flight date. Fees for changing itineraries are currently recognized when received. The Company expects to defer the recognition of these fees until the related transportation is provided. Amounts currently classified in other revenue (e.g. bag and other ancillary fees) will be reclassified to passenger revenue. The adoption of the standard will have a significant impact on the Company's financial statements. The Company is currently in the process of quantifying the effects of the new standard on the Company's financial statements.