Hawaiian (HA) 10-K 13 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2018	Feb. 08, 2019	Jun. 30, 2018
Document and Entity Information
Entity Registrant Name	HAWAIIAN HOLDINGS INC
Entity Central Index Key	1,172,222
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 1.8
Entity Common Stock, Shares Outstanding		48,421,855
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	[1]	Dec. 31, 2016	[1]
Operating Revenue:
Total Operating Revenue	$ 2,837,411	$ 2,675,145		$ 2,432,413
Operating Expenses:
Wages and benefits	684,719	632,997		535,264
Aircraft fuel, including taxes and delivery	599,544	440,383		344,322
Aircraft rent	125,961	137,764		124,565
Maintenance materials and repairs	239,759	219,553		229,044
Aircraft and passenger servicing	157,796	144,853		129,899
Commissions and other selling	129,315	126,750		122,787
Depreciation and amortization	139,866	113,277		108,128
Other rentals and landing fees	126,903	116,763		108,087
Purchased services	131,651	110,787		96,199
Contract terminations expense	35,322	0		0
Special items	0	23,450		109,142
Other	152,207	144,530		127,489
Total	2,523,043	2,211,107		2,034,926
Operating Income	314,368	464,038		397,487
Nonoperating Income (Expense):
Other nonoperating special items	0	(45,585)		0
Interest expense and amortization of debt discounts and issuance costs	(33,001)	(30,901)		(36,612)
Interest income	9,242	6,132		4,007
Capitalized interest	7,887	8,437		2,651
Other components of net periodic benefit cost, excluding settlements	(825)	(16,713)		(20,270)
Gains on fuel derivatives	5,590	3,312		20,106
Loss on extinguishment of debt	0	0	[2]	(10,473)	[2]
Other, net	(2,103)	2,101		4,323
Total	(13,210)	(73,217)		(36,268)
Income Before Income Taxes	301,158	390,821		361,219
Income tax expense	67,958	60,211		137,099
Net Income	$ 233,200	$ 330,610	[2],[3]	$ 224,120	[2],[3]
Net Income Per Common Stock Share:
Basic (in dollars per share)	$ 4.63	$ 6.23		$ 4.19
Diluted (in dollars per share)	$ 4.62	$ 6.19		$ 4.15
Weighted Average Number of Common Stock Shares Outstanding:
Basic (in shares)	50,338	53,074		53,502
Diluted (in shares)	50,488	53,413		53,958
Cash dividends declared per common share (in dollars per share)	$ 0.48	$ 0.12		$ 0
Passenger
Operating Revenue:
Total Operating Revenue	$ 2,602,793	$ 2,486,827		$ 2,271,687
Other
Operating Revenue:
Total Operating Revenue	$ 234,618	$ 188,318		$ 160,726
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[3]	Amounts adjusted for the adoption of ASC No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	[1]	Dec. 31, 2016	[1]
Statement of Comprehensive Income [Abstract]
Net Income	$ 233,200	$ 330,610	[2],[3]	$ 224,120	[2],[3]
Other Comprehensive Income (Loss), net:
Net change related to employee benefit plans, net of tax benefit of $2,414 for 2018, net of tax expense of $22,321 for 2017, and tax benefit of $3,588 for 2016	(7,243)	34,249		(6,337)
Net change in derivative instruments, net of tax expense of $586 for 2018, tax benefit of $3,548 for 2017, and tax expense of $1,290 for 2016	1,799	(5,822)		2,111
Net change in available-for-sale investments, net of tax expense of $25 for 2018, tax benefit of $120 for 2017, and tax expense of $6 for 2016	78	(198)		10
Total Other Comprehensive Income (Loss)	(5,366)	28,229		(4,216)
Total Comprehensive Income	$ 227,834	$ 358,839		$ 219,904
[1]	Amounts adjusted for the adoption of ASC No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[3]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net change related to employee benefit plans, tax expense (benefit)	$ (2,414)	$ 22,321	$ (3,588)
Net change in derivative instruments, tax expense (benefit)	586	(3,548)	1,290
Unrealized loss on short-term and long-term investments, tax expense (benefit)	$ 25	$ (120)	$ 6

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	[1]
Current Assets:
Cash and cash equivalents	$ 268,577	$ 190,953
Restricted cash	0	1,000
Short-term investments	232,241	269,297
Accounts receivable, net	111,834	140,279
Spare parts and supplies, net	33,942	35,361
Prepaid expenses and other	58,573	79,186
Total	705,167	716,076
Property and equipment, net
Flight equipment	2,307,033	1,848,061
Pre-delivery deposits on flight equipment	119,957	150,652
Other property and equipment	421,582	402,098
Total property and equipment, gross	2,848,572	2,400,811
Less accumulated depreciation and amortization	(663,461)	(558,548)
Total	2,185,111	1,842,263
Other Assets:
Long-term prepayments and other	185,556	193,632
Intangible assets, net	14,149	15,187
Goodwill	106,663	106,663
Total Assets	3,196,646	2,873,821
Current Liabilities:
Accounts payable	143,146	140,805
Air traffic liability and current frequent flyer deferred revenue	603,736	589,093
Other accrued liabilities	158,154	147,593
Current maturities of long-term debt, less discount, and capital lease obligations	101,097	59,470
Total	1,006,133	936,961
Long-Term Debt and Capital Lease Obligations	608,684	511,201
Other Liabilities and Deferred Credits:
Accumulated pension and other postretirement benefit obligations	182,620	220,788
Other liabilities and deferred credits	119,826	75,841
Noncurrent frequent flyer deferred revenue	163,619	149,764
Deferred tax liability, net	167,770	134,141
Total	633,835	580,534
Commitments and Contingent Liabilities
Shareholders' Equity:
Special preferred stock, $0.01 par value per share, three shares issued and outstanding at December 31, 2018 and 2017	0	0
Common stock, $0.01 par value per share, 48,540,280 and 51,173,453 shares issued and outstanding as of December 31, 2018 and 2017, respectively	485	512
Capital in excess of par value	128,448	126,743
Accumulated income	912,201	793,134
Accumulated other comprehensive loss, net	(93,140)	(75,264)
Total	947,994	845,125
Total Liabilities and Shareholders' Equity	$ 3,196,646	$ 2,873,821
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Special preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Special preferred stock, shares issued	3	3
Special preferred stock, shares outstanding	3	3
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued	48,540,280	51,173,453
Common stock, shares outstanding	48,540,280	51,173,453

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total		Common Stock	[1]	Special Preferred Stock	[2]	Capital In Excess of Par Value	Accumulated Income	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2015	$ 446,062		$ 534		$ 0		$ 124,091	$ 420,714	$ (99,277)
Increase (Decrease) in Stockholders' Equity
Net Income	224,120	[3],[4],[5]						224,120
Dividends declared on common stock	0
Other comprehensive income (loss)	(4,216)	[3]							(4,216)
Issuance of shares of common stock, net of shares withheld for taxes	(7,585)		4				(7,589)
Repurchase and retirement of shares of common stock	(13,763)		(4)				(13,759)
Share-based compensation expense	6,005						6,005
Excess tax benefits from stock issuance	19,656						19,656
Reacquisition of equity component of convertible notes	(1,138)						(1,138)
Ending balance at Dec. 31, 2016	593,067		534		0		127,266	568,760	(103,493)
Increase (Decrease) in Stockholders' Equity
Net Income	330,610	[3],[4],[5]						330,610
Dividends declared on common stock	(6,261)							(6,261)
Other comprehensive income (loss)	28,229	[3]							28,229
Issuance of shares of common stock, net of shares withheld for taxes	(7,532)		3				(7,535)
Repurchase and retirement of shares of common stock	(100,000)		(25)					(99,975)
Share-based compensation expense	7,012						7,012
Ending balance at Dec. 31, 2017	845,125	[6]	512		0		126,743	793,134	(75,264)
Increase (Decrease) in Stockholders' Equity
Net Income	233,200							233,200
Dividends declared on common stock	(24,171)							(24,171)
Other comprehensive income (loss)	(5,366)								(5,366)
Issuance of shares of common stock, net of shares withheld for taxes	(3,644)		1				(3,645)
Repurchase and retirement of shares of common stock	(102,500)		(28)					(102,472)
Share-based compensation expense	5,350						5,350
Ending balance at Dec. 31, 2018	$ 947,994		$ 485		$ 0		$ 128,448	$ 912,201	$ (93,140)
[1]	Common Stock—$0.01 par value; 118,000,000 authorized as of December 31, 2018 and 2017.
[2]	Special Preferred Stock—$0.01 par value; 2,000,000 shares authorized as of December 31, 2018 and 2017
[3]	Amounts adjusted for the adoption of ASC No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[4]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[5]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[6]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Issuance of common stock related to stock awards (in shares)	182,843	247,852	412,857
Repurchase and retirement of shares (in shares)	2,816,016	2,509,633	379,062
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	118,000,000	118,000,000
Special preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Special preferred stock, shares authorized (in shares)	2,000,000	2,000,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Cash Flows From Operating Activities:
Net Income		$ 233,200	$ 330,610	[1],[2],[3]	$ 224,120	[1],[2],[3]
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of intangible assets		1,038	1,224	[3]	2,322	[3]
Depreciation and amortization of property and equipment		139,401	112,627	[3]	107,041	[3]
Deferred income taxes, net		35,433	(1,095)	[3]	29,439	[3]
Impairment of assets		0	0	[3]	49,361	[3]
Stock compensation		5,349	7,286	[3]	8,424	[3]
Loss on termination of lease		(1,201)	0	[3]	0	[3]
Loss on extinguishment of debt		0	0	[2],[3]	10,473	[2],[3]
Amortization of debt discounts and issuance costs		4,482	5,252	[3]	5,579	[3]
Post retirement payments		(56,663)	(153,959)	[3]	(60,931)	[3]
Pension and postretirement benefit cost		9,350	29,580	[3]	34,569	[3]
Partial settlement and curtailment loss		0	45,585	[3]	0	[3]
Change in unrealized (gain) loss on fuel derivative contracts		19,973	(3,845)	[3]	(47,678)	[3]
Foreign currency debt remeasurement (gain)/loss		380	0	[3]	0	[3]
Other, net		8,610	11,170	[3]	2,172	[3]
Changes in operating assets and liabilities:
Accounts receivable, net		21,132	(40,782)	[3]	(18,954)	[3]
Spare parts and supplies, net		(4,701)	(21,964)	[3]	(5,259)	[3]
Prepaid expenses and other current assets		(149)	1,915	[3]	(13,138)	[3]
Accounts payable		2,926	21,964	[3]	12,306	[3]
Air traffic liability		7,830	57,474	[3]	35,311	[3]
Other accrued liabilities		18,329	(24,629)	[3]	47,183	[3]
Frequent flyer deferred revenue		20,668	28,662	[3]	36,290	[3]
Other assets and liabilities, net		43,121	(75,940)	[3]	(21,586)	[3]
Net cash provided by operating activities		508,508	331,135	[3]	437,044	[3]
Cash Flows From Investing Activities:
Additions to property and equipment, including pre-delivery deposits		(486,777)	(341,515)	[3]	(178,838)	[3]
Proceeds from purchase assignment and leaseback transactions		87,000	33,000	[3]	31,851	[3]
Proceeds from disposition of equipment		46,714	941	[3]	16	[3]
Purchases of investments		(210,836)	(231,393)	[3]	(260,987)	[3]
Sales of investments		247,423	244,261	[3]	253,855	[3]
Net cash used in investing activities		(316,476)	(294,706)	[3]	(154,103)	[3]
Cash Flows From Financing Activities:
Long-term borrowings		86,500	0	[3]	0	[3]
Repayments of long-term debt and capital lease obligations		(68,245)	(61,486)	[3]	(214,025)	[3]
Dividend payments		(24,171)	(6,261)	[3]	0	[3]
Repurchases and conversion of convertible notes		0	0	[3]	(1,426)	[3]
Repurchases of common stock		(102,500)	(100,000)	[3]	(13,763)	[3]
Debt issuance costs		(3,350)	(188)	[3]	(1,653)	[3]
Payment for taxes withheld for stock compensation		(3,642)	(7,532)	[3]	(7,585)	[3]
Net cash used in financing activities		(115,408)	(175,467)	[3]	(238,452)	[3]
Net increase (decrease) in cash and cash equivalents		76,624	(139,038)	[3]	44,489	[3]
Cash, cash equivalents, and restricted cash—Beginning of Year	[3]	191,953	330,991		286,502
Cash, cash equivalents, and restricted cash—End of Year		$ 268,577	$ 191,953	[3]	$ 330,991	[3]
[1]	Amounts adjusted for the adoption of ASC No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[3]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation Hawaiian Holdings, Inc. (the Company, Holdings, we, us and our) and its direct wholly-owned subsidiary, Hawaiian Airlines, Inc. (Hawaiian), are incorporated in the State of Delaware. The Company's primary asset is its sole ownership of all issued and outstanding shares of common stock of Hawaiian. The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, including its principal subsidiary, Hawaiian, through which the Company conducts substantially all of its operations. All significant inter-company balances and transactions have been eliminated upon consolidation. The Company reclassified certain prior period amounts to conform to the current period presentation. Unless otherwise noted, all amounts disclosed are stated before consideration of income taxes. Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ materially from those estimates. Cash Equivalents Cash equivalents consist of short-term, highly liquid investments with an original maturity of three months or less at the date of purchase. Restricted Cash Restricted cash consists of cash held as collateral by institutions that process our credit card transactions for advanced ticket sales. Short Term Investments Investments with original maturities of greater than three months and remaining maturities of less than one year are classified as short-term investments. Investments with maturities beyond one year may be classified as short-term based on their highly liquid nature and because such marketable securities represent the investment of cash that is available for current operations. All short-term investments, which consists of debt securities, are classified as available-for-sale, and realized gains and losses are recorded using the specific identification method. Changes in market value, excluding other-than-temporary impairments, are reflected in accumulated other comprehensive income (loss). Spare Parts and Supplies Spare parts and supplies are valued at average cost, and primarily consist of expendable parts for flight equipment and other supplies. An allowance for obsolescence of expendable parts is provided over the estimated useful lives of the related aircraft and engines for spare parts expected to be on hand at the date the aircraft are retired from service. These allowances are based on management's estimates and are subject to change. Property, Equipment and Depreciation Property and equipment are stated at cost and depreciated on a straight-line basis to their estimated residual values over the asset's estimated useful life. Depreciation begins when the asset is placed into service. Aircraft and related parts begin depreciating on the aircraft's first revenue flight. Estimated useful lives and residual values of property and equipment are as follows: Boeing 717-200 aircraft and engines 7 - 11 years, 7 - 34% residual value Boeing 767-300 aircraft and engines (1) Through retirement in 2019 Airbus A330-200 aircraft and engines 25 years, 10% residual value Airbus A321neo aircraft and engines 25 years, 10% residual value ATR turboprop aircraft and engines 10 years, 15% residual value Flight and ground equipment under capital lease Shorter of lease term or useful life Major rotable parts Average lease term or useful life for related aircraft, 10% - 15% residual value Improvements to leased flight equipment and the cargo maintenance hangar Shorter of lease term or useful life Facility leasehold improvements Shorter of lease term, including assumed lease renewals when renewal is economically compelled at key airports, or useful life Furniture, fixtures and other equipment 3 - 7 years, no residual value Capitalized software 3 - 7 years, no residual value (1) The Company will retire its Boeing 767-300 aircraft and flight equipment in the first quarter of 2019. Additions and modifications that significantly enhance the operating performance and/or extend the useful lives of property and equipment are capitalized and depreciated over the lesser of the remaining useful life of the asset or the remaining lease term, as applicable. Expenditures that do not improve or extend asset lives are charged to expense as incurred. Pre-delivery deposits are capitalized when paid. Aircraft under capital leases are recorded at an amount equal to the present value of minimum lease payments utilizing the Company's incremental borrowing rate at lease inception and amortized on a straight-line basis over the lesser of the remaining useful life of the aircraft or the lease term. The amortization is recorded in depreciation and amortization expense on the Consolidated Statement of Operations. Accumulated amortization of aircraft and other capital leases was $90.5 million and $70.9 million as of December 31, 2018 and 2017 , respectively. The Company capitalizes certain costs related to the acquisition and development of computer software and amortizes these costs using the straight-line method over the estimated useful life of the software. The net book value of computer software, which is included in Other property and equipment on the consolidated balance sheets, was $27.9 million and $34.6 million at December 31, 2018 and 2017 , respectively. The value of construction in progress, primarily consisting of aircraft in 2018 and aircraft facilities in 2017 , which is included in property and equipment on the consolidated balance sheets, was $47.3 million and $135.3 million as of December 31, 2018 and 2017 , respectively. Amortization expense related to computer software was $14.6 million , $12.3 million and $9.7 million for the years ended December 31, 2018 , 2017 , and 2016 respectively. Aircraft Maintenance and Repair Costs Maintenance and repair costs for owned and leased flight equipment, including the overhaul of aircraft components, are charged to operating expenses as incurred. Engine overhaul costs covered by power-by-the-hour arrangements are paid and expensed as incurred or expensed on a straight-line basis and are based on the amount of hours flown per contract. Under the terms of these power-by-the-hour agreements, the Company pays a set dollar amount per engine hour flown on a monthly basis and the third-party vendor assumes the obligation to repair the engines at no additional cost, subject to certain specified exclusions. As of December 31, 2018 and 2017, the Company had approximately $95.0 million and $109.3 million , respectively in prepayments to one of its power-by-the-hour vendors, which is recoverable over the next four years . Additionally, although the Company's aircraft lease agreements specifically provide that it is responsible for maintenance of the leased aircraft, the Company pays maintenance reserves to the aircraft lessors that are applied toward the cost of future maintenance events. These reserves are calculated based on a performance measure, such as flight hours, and are available for reimbursement to the Company upon the completion of the maintenance of the leased aircraft. However, reimbursements are limited to the available reserves associated with the specific maintenance activity for which the Company requests reimbursement. Under certain aircraft lease agreements, the lessor is entitled to retain excess amounts on deposit at the expiration of the lease, if any; whereas at the expiration of certain other existing aircraft lease agreements any such excess amounts are returned to the Company, provided that it has fulfilled all of its obligations under the lease agreements. The maintenance reserves paid under the lease agreements do not transfer either the obligation to maintain the aircraft or the cost risk associated with the maintenance activities to the aircraft lessor. In addition, the Company maintains the right to select any third-party maintenance provider. Maintenance reserve payments that are expected to be recovered from lessors are recorded as deposits in the Consolidated Balance Sheets as an asset until it is less than probable that any portion of the deposit is recoverable. In addition, payments of maintenance reserves that are not substantially and contractually related to the maintenance of the leased assets are expensed as incurred. Any costs that are substantially and contractually unrelated to the maintenance of the leased asset are considered to be unrecoverable. In order to properly account for the costs that are related to the maintenance of the leased asset, the Company bifurcates its maintenance reserves into two groups and expenses the proportionate share that is expected to be unrecoverable. Goodwill and Indefinite-lived Intangible Assets Goodwill and intangible assets with indefinite lives are not amortized. We apply a fair value-based impairment test to the carrying value of goodwill and indefinite-lived intangible assets on an annual basis and, if certain events or circumstances indicate that an impairment loss may have been incurred, on an interim basis. We assess the value of our goodwill and indefinite-lived assets under either a qualitative or quantitative approach. Goodwill. When the Company evaluates goodwill for impairment using a quantitative approach, it estimates the fair value of the reporting unit by considering the market capitalization. If the reporting unit's fair value exceeds its carrying value, no further testing is required. If, however, the reporting unit's carrying value exceeds its fair value, the Company then determines the amount of the impairment charge, if any. The Company recognizes an impairment charge if the carrying value of the reporting unit's goodwill exceeds its estimated fair value. Intangible Assets. The Company assesses its indefinite-lived assets under a qualitative approach. The Company analyzes market factors to determine if events and circumstances have affected the fair value of the indefinite-lived intangible assets. If the Company determines that it is more likely than not that the asset value may be impaired, it then uses the quantitative approach to assess the asset's fair value and the amount of the impairment. The Company performs the quantitative impairment test for indefinite-lived intangible assets by comparing the asset's fair value to its carrying value. Impairment of Long-Lived Assets and Finite-lived Intangible Assets Long-lived assets used in operations, consisting principally of property and equipment and finite-lived intangible assets, are tested for impairment when events or changes in circumstances indicate, in management's judgment, that the assets might be impaired and the undiscounted cash flows estimated to be generated by those assets are less than their carrying amount. When testing for impairment management considers market trends, the expected useful lives of the assets, changes in economic conditions, recent transactions involving sales of similar assets and, if necessary, estimates of future undiscounted cash flows. To determine whether impairment exists for aircraft used in operations, assets are grouped at the fleet-type level (the lowest level for which there are identifiable cash flows) and future cash flows are estimated based on projections of capacity, passenger mile yield, fuel costs, labor costs and other relevant factors. If, at any time, management determines the net carrying value of an asset is not recoverable, the amount is reduced to its fair value during the period in which such determination is made. Any changes in the estimated useful lives of these assets will be accounted for prospectively. In 2016, a $49.4 million impairment charge was recorded as the Company determined that the Boeing 767-300 fleet and related assets were impaired. See Note 11 for further details. Operating Leases The Company leases aircraft, engines, airport terminal facilities, office space, and other equipment under operating leases. Some of these lease agreements include escalation clauses and renewal options. For scheduled rent escalation clauses during the lease terms or for rental payments commencing at a date other than the date of initial occupancy, the Company records minimum rental expenses on a straight-line basis over the terms of the leases in the Consolidated Statements of Operations. Rental expense for operating leases totaled $201.1 million , $208.0 million , and $193.0 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. Leased Aircraft Return Costs Costs associated with the return of leased aircraft are accrued when it is probable that a payment will be made and that amount is reasonably estimable, usually no sooner than after the last scheduled maintenance event prior to lease return. Any accrual is based on the time remaining on the lease, planned aircraft usage, and the provisions included in the lease agreement, although the actual amount due to any lessor upon return will not be known with certainty until lease termination. As leased aircraft are returned, any payments are charged against the established accrual. The accrual is part of current and long-term liabilities and was not material as of December 31, 2018 and 2017. The expense is included in Aircraft rent in the consolidated statements of operations. Revenue Recognition Passenger revenue. The majority of the Company's revenue is derived from transporting passengers on our aircraft. The Company accounts for revenue in accordance with ASC 606, which was adopted on January 1, 2018, using the full retrospective method. See Recently Adopted Accounting Pronouncements section below for further discussion of adoption, including the impact on our previously issued financial statements. The Company's primary operations are that of its wholly-owned subsidiary, Hawaiian. Principally all operations of Hawaiian either originate and/or end in the State of Hawai'i. The management of such operations is based on a system-wide approach due to the interdependence of Hawaiian's route structure in its various markets. As Hawaiian offers only one significant line of business (i.e., air transportation), management has concluded that it has only one segment. The Company's operating revenues by geographic region (as defined by the Department of Transportation, DOT) are summarized below: Year Ended December 31, 2018 2017 2016 (in thousands) Domestic $ 2,071,861 $ 1,976,971 $ 1,874,039 Pacific 765,550 698,174 558,374 Total operating revenue $ 2,837,411 $ 2,675,145 $ 2,432,413 Hawaiian attributes operating revenue by geographic region based on the destination of each flight segment. Hawaiian's tangible assets consist primarily of flight equipment, which are mobile across geographic markets, and, therefore, have not been allocated to specific geographic regions. Passenger & Other revenue - Generally, the Company’s contracts with customers have two principal performance obligations, which are the promise to provide transportation to the passenger and the frequent flyer miles earned on the flight. In addition, the Company often charges additional fees for items such as baggage and in-flight entertainment. Such items are not capable of being distinct from the transportation provided because the customer can only benefit from the services during the flight. The transportation performance obligation, including the redemption of HawaiianMiles awards for flights, is satisfied, and revenue is recognized, as transportation is provided. In some instances, tickets sold by the Company can include a flight segment on another carrier which is referred to as an interline segment. In this situation, the Company acts as an agent for the other carrier and revenue is recognized net of cost in other revenue. Tickets sold by other airlines where the Company provides the transportation are recognized as passenger revenue at the estimated value to be billed to the other airline when travel is provided. Differences between amounts billed and the actual amounts may be rejected and rebilled or written off if the amount recorded was different from the original estimate. Other operating revenue consists of cargo revenue, ground handling fees, commissions, and fees earned under certain joint marketing agreements with other companies. These amounts are recognized when the service is provided. Year Ended December 31, 2018 2017 2016 Passenger Revenue by Type (in thousands) Passenger revenue, excluding frequent flyer $ 2,454,811 $ 2,351,062 $ 2,146,258 Frequent flyer revenue, transportation component 147,982 135,765 125,429 Passenger Revenue $ 2,602,793 $ 2,486,827 $ 2,271,687 Other revenue (e.g. cargo and other miscellaneous) $ 163,140 $ 142,172 $ 115,379 Frequent flyer revenue, marketing and brand component 71,478 46,146 45,347 Other Revenue $ 234,618 $ 188,318 $ 160,726 For the twelve months ended December 31, 2018 , 2017 , and 2016 , the Company's total revenue was $2.8 billion , $2.7 billion , and $2.4 billion , respectively. As of December 31, 2018 and 2017 , the Company's Air traffic liability balance as it relates to passenger tickets (excluding frequent flyer) was $427.8 million and $421.6 million , respectively, which represents future revenue that is expected to be realized over the next 12 months . During the twelve months ended December 31, 2018 , 2017 , and 2016 , the amount of revenue recognized that was included in Air traffic liability as of the beginning of the respective period was $421.0 million , $363.9 million , and $328.7 million , respectively. Passenger revenue associated with unused tickets, which represent unexercised passenger rights, is recognized in proportion to the pattern of rights exercised by related passengers (e.g. scheduled departure dates). To calculate the portion to be recognized as revenue in the period, the Company utilizes historical information and applies the trend rate to the current air traffic liability balances for that specific period. Certain governmental taxes are imposed on the Company's ticket sales through a fee included in ticket prices. The Company collects these fees and remits them to the appropriate government agency. Management has elected (via a practical expedient election) to exclude from the measurement of the transaction price all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected from a customer, e.g., sales, use, value added, and certain excise taxes. These fees have been presented on a net basis in the accompanying Consolidated Statements of Operations and recorded as a liability until remitted. Frequent Flyer Revenue. Hawaiian's frequent flyer travel award program provides a variety of awards to program members based on accumulated mileage. ASC 606 requires the Company to account for miles earned by passengers in the HawaiianMiles program through flight activity as a component of the passenger revenue ticket transaction at the estimated selling price of the miles. Ticket consideration received is allocated between the performance obligations, primarily travel and miles earned by passengers. The allocated value of the miles is deferred until the free travel or other award is used by the passenger, at which time it is included in passenger revenue. The value of the ticket used in the determination of the estimated selling price is based on the historical value of equivalent flights to those provided for loyalty awards and the related miles redeemed to obtain that award adjusted for breakage or fulfillment. The equivalent ticket value (ETV) includes a fulfillment discount (breakage) to reflect the value of the award ticket over the number of miles that, based on historical experience, will be needed to obtain the award. On a quarterly basis, the Company calculates the ETV by analyzing the fares of similar tickets for the prior 12 months, considering cabin class and geographic region. The Company also sells mileage credits to companies participating in our frequent flyer program These contracts generally include multiple performance obligations, including the transportation that will ultimately be provided when the mileage credits are redeemed and marketing and brand related activities. The marketing and brand performance obligations are effectively provided each time a HawaiianMiles member uses the co-branded credit card and monthly access to customer lists and marketing is provided, which corresponds to the timing of when the Company issues or is obligated to issue the mileage credits to the HawaiianMiles member. Therefore, the Company recognizes revenue for the marketing and brand performance obligations when HawaiianMiles members use their co-brand credit card and the resulting mileage credits are issued to them, which best correlates with the Company’s performance in satisfying the obligation. During the first quarter of 2018, the Company amended its partnership with Barclaycard US, Hawaiian's co-branded credit card partner. Management determined that the amendment should be accounted for as a termination of the existing contract and the creation of a new contract under ASC 606 and the relative selling price was determined for each performance obligation of the new agreement. The new agreement continues through 2024 and includes improved economics and enhanced product offerings for our Barclay's co-branded cardholders. The amended agreement did not change, and includes the following performance obligations; (i) transportation that will ultimately be provided when mileage credits are redeemed (transportation), (ii) the Hawaiian Airlines brand and access to its members lists (collectively, brand performance), (iii) marketing, and (iv) airline benefits to cardholders, including discounts and anniversary travel benefits, baggage waivers and inflight purchase credits. The Company determined the relative fair value of each performance obligation by estimating the selling prices of the deliverables by considering discounted cash flows using multiple inputs and assumptions, including: (1) the expected number of miles to be awarded and redeemed; (2) the estimated weighted average equivalent ticket value, adjusted by a fulfillment discount; (3) the estimated total annual cardholder spend; (4) an estimated royalty rate for the Hawaiian portfolio; and (5) the expected use of each of the airline benefits. The overall consideration received is allocated to the performance obligations based on their relative selling prices. The transportation performance obligation is deferred and recognized as passenger revenue when the transportation is expected to be provided. Accounting for mileage sales to co-branded partners involves the use of various techniques to estimate revenue. To determine the total estimated transaction price, the Company forecasts future credit card activity using historical information. The relative selling price is determined using management’s standalone estimated selling price of each performance obligation. The objective of using the estimated selling price based methodology is to determine the price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. Accordingly, the Company determines the best estimate of selling price by considering multiple inputs and methods including, but not limited to, discounted cash flows, brand value, published selling prices, number of miles awarded and number of miles redeemed. The Company estimates the selling price of miles using an ETV adjusted for a fulfillment discount as described above. The Company's frequent flyer liability is recorded in Air traffic liability (short-term) and Noncurrent frequent flyer deferred revenue in the Company's consolidated balance sheet based on estimated and expected redemption patterns using historical data and analysis. As of December 31, 2018 and 2017 , the balances were as follows: As of December 31, 2018 2017 (in thousands) Air traffic liability (current portion of frequent flyer deferred revenue) $ 168,570 $ 161,757 Noncurrent frequent flyer deferred revenue 163,619 149,764 Total frequent flyer liability $ 332,189 $ 311,521 Miles expire after 18 months of member account inactivity. The Company reviews its breakage estimates annually based upon the latest available information regarding redemption and expiration patterns (e.g., credit card and non-credit card holders). The Company’s estimate of the expected expiration of miles requires significant management judgment. Current and future changes to expiration assumptions or to the expiration policy, or to program rules and program could affect the estimated value of a mile. Accounts Receivable Accounts receivable primarily consist of amounts due from credit card companies, non-airline partners, and cargo transportation customers. The Company provides an allowance for uncollectible accounts equal to the estimated losses expected to be incurred based on historical chargebacks, write-offs, bankruptcies and other specific analyses. Bad debt expense was not material in any period presented. Costs to obtain or fulfill a contract In order for the Company to provide transportation to its customers, the Company incurs fulfillment costs (booking fees, credit card fees, and commission/selling costs), which are deferred until the period in which the flight occurs. As of December 31, 2018 and 2017 , the Company's asset balance associated with these costs were $16.3 million and $16.7 million , respectively. During the twelve months ended December 31, 2018 , 2017 , and 2016 , expenses related to these costs totaled to $96.0 million , $95.5 million , and $94.3 million , respectively. To determine the amount to capitalize and expense at the end of each period, the Company uses historical sales data and estimates the amount associated with unflown tickets. Pension and Postretirement and Postemployment Benefits The Company accounts for its defined benefit pension and other postretirement and postemployment plans in accordance with ASC 715, Compensation—Retirement Benefits (ASC 715), which requires companies to measure their plans' assets and obligations to determine the funded status at fiscal year-end, reflect the funded status in the statement of financial position as an asset or liability, and recognize changes in the funded status of the plans in comprehensive income during the year in which the changes occur. Pension and other postretirement and postemployment benefit expenses are recognized on an accrual basis over each employee's service periods. Pension expense is generally independent of funding decisions or requirements. The Company uses the corridor approach in the valuation of its defined benefit pension and other postretirement and postemployment plans. The corridor approach defers all actuarial gains and losses resulting from variances between actual results and actuarial assumptions. These unrecognized actuarial gains and losses are amortized when the net gains and losses exceed 10% of the greater of the market-related value of plan assets or the projected benefit obligation at the beginning of the year. The amount in excess of the corridor is amortized over the expected average remaining service period of active plan participants for the open plans and is amortized over the expected average remaining lifetime of inactive participants for plans whose population is “all or almost all” inactive. Advertising Costs Advertising costs are expensed when incurred. Advertising expense was $19.3 million , $16.6 million and $18.3 million for the years ended December 31, 2018 , 2017 , and 2016 , respectively. Capitalized Interest Interest is capitalized upon the payment of predelivery deposits for aircraft and engines, and is depreciated over the estimated useful life of the asset from service inception date. Share-Based Compensation The Company measures the cost of employee services received in exchange for an award of equity instruments based on the grant date fair value of the award. The fair value of the awards are estimated using the following: (1) option-pricing models for grants of stock options or (2) fair value at the measurement date (usually the grant date) for awards of stock subject to service and / or performance-based vesting. The resulting cost is recognized as compensation expense over the period of time during which an employee is required to provide services to the Company (the service period) in exchange for the award, the service period generally being the vesting period of the award. The Company's policy is to recognize forfeitures as they occur. Financial Derivative Instruments The Company uses derivatives to manage risks associated with certain assets and liabilities arising from the potential adverse impact of fluctuations in global aircraft fuel prices, interest rates and foreign currency exchange rates. The following table summarizes the accounting treatment of the Company's derivative contracts: Classification of Unrealized Gains (Losses) Derivative Type Accounting Designation Classification of Realized Gains and Losses Effective Portion Ineffective Portion Interest rate contracts Designated as cash flow hedges Interest expense and amortization of debt discounts and issuance costs AOCI Nonoperating income (expense) Foreign currency exchange contracts Designated as cash flow hedges Passenger revenue AOCI Nonoperating income (expense) Fuel hedge contracts Not designated as hedges Gains (losses) on fuel derivatives Change in fair value is recorded in nonoperating income (expense) Foreign currency exchange contracts Not designated as hedges Nonoperating income (expense), Other Change in fair value is recorded in nonoperating income (expense) If the Company terminates a derivative designated for hedge accounting under ASC 815, prior to its contractual settlement date, then the cumulative gain or loss recognized in AOCI at the termination date remains in AOCI until the forecasted transaction occurs. In a situation where it becomes probable that a hedged forecasted transaction will not occur, any gains and/or losses that have been recorded to AOCI would be required to be immediately reclassified into earnings. All cash flows associated with purchasing and settling derivatives are classified as operating cash flows in the Consolidated Statements of Cash Flows. Recently Adopted Accounting Pronouncements In February 2018, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220) Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The standard focuses on a targeted improvement to reclassify stranded tax effects resulting from the Tax Cuts and Jobs Act (the Tax Act) enacted on December 22, 2017 from accumulated other comprehensive income to retained earnings. The Company elected to early adopt the standard in the year ended December 31, 2018 and reclassified tax benefit of $12.5 million from accumulated other comprehensive income to accumulated income in the Consolidated Balance Sheets. In May 2014, the Financial Accounting Standards Board (FASB) issued ASC 606, 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. ASC 606 replaced most existing revenue recognition guidance in GAAP and is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. The Company adopted the standard as of January 1, 2018, utilizing the full retrospective transition method, which required the Company to restate prior reporting periods presented. The most significant impact of the standard relates to the accounting for the Company's frequent flyer travel award program. This change, as well as other less significant changes, are described below: • Frequent flyer - The standard requires the Company to account for miles earned by passengers in the HawaiianMiles program through flight activity as a component of the passenger revenue ticket transaction at the estimated selling price of the miles, effectively eliminating the incremental cost accounting previously applied. The allocated value of miles earned through flights and sold to partners is recognized at the time the free travel or other award is redeemed by the passenger. Previously, the transportation element associated with sold miles was

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2018
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Reclassifications out of accumulated other comprehensive loss by component is as follows: Year ended December 31, Details about accumulated other comprehensive loss components 2018 2017 2016 Affected line items in the statement where net income is presented (in thousands) Derivatives designated as hedging instruments under ASC 815 Foreign currency derivative (gains) losses, net $ (1,380 ) $ (2,391 ) $ 196 Passenger revenue Interest rate derivative losses, net — — 944 Interest expense Total before tax (1,380 ) (2,391 ) 1,140 Tax expense (benefit) 339 906 (438 ) Total, net of tax $ (1,041 ) $ (1,485 ) $ 702 Amortization of defined benefit pension items Actuarial loss $ 2,708 $ 8,792 $ 7,730 Nonoperating Income (Expense), Other, net Prior service cost 225 254 227 Nonoperating Income (Expense), Other, net Partial settlement and curtailment loss — 10,384 — Other nonoperating special items Loss on plan termination — 35,201 — Other nonoperating special items Total before tax 2,933 54,631 7,957 Tax benefit (671 ) (21,519 ) (3,048 ) Total, net of tax $ 2,262 $ 33,112 $ 4,909 Short-term investments Realized (gain) loss on sales of investments, net 107 (32 ) (108 ) Nonoperating Income (Expense), Other, net Total before tax 107 (32 ) (108 ) Tax expense (26 ) 12 41 Total, net of tax 81 (20 ) (67 ) Total reclassifications for the period $ 1,302 $ 31,607 $ 5,544 A rollforward of the amounts included in accumulated other comprehensive loss, net of taxes, is as follows: Year ended December 31, 2018 Foreign Defined Short-Term Investments Total (in thousands) Beginning balance $ 1,249 $ (75,953 ) $ (560 ) $ (75,264 ) Reclassification of stranded tax effects (a) 269 (12,659 ) (120 ) (12,510 ) Other comprehensive income (loss) before reclassifications, net of tax 2,840 (9,505 ) (3 ) (6,668 ) Amounts reclassified from accumulated other comprehensive income (loss), net of tax (1,041 ) 2,262 81 1,302 Net current-period other comprehensive income (loss), net of tax 1,799 (7,243 ) 78 (5,366 ) Ending balance $ 3,317 $ (95,855 ) $ (602 ) $ (93,140 ) (a) Amounts represent the reclassification from AOCI to RE of the stranded tax effectives resulting from the enactment of the Tax Act and adoption of ASU 2018-02. Year ended December 31, 2017 Foreign Defined Short-Term Investments Total (in thousands) Beginning balance $ 7,071 $ (110,202 ) $ (362 ) $ (103,493 ) Other comprehensive income (loss) before reclassifications, net of tax (4,337 ) 1,137 (178 ) (3,378 ) Amounts reclassified from accumulated other comprehensive income (loss), net of tax (1,485 ) 33,112 (20 ) 31,607 Net current-period other comprehensive income (loss), net of tax (5,822 ) 34,249 (198 ) 28,229 Ending balance $ 1,249 $ (75,953 ) $ (560 ) $ (75,264 )

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per share, which excludes dilution, is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding for the period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock. Antidilutive common stock equivalents excluded from the diluted earnings per share calculation are not material. The following table shows our computation of basic and diluted earnings per share: Year Ended December 31, 2018 2017 2016 (in thousands, except for per share data) Numerator: Net Income $ 233,200 $ 330,610 $ 224,120 Denominator: Weighted average common shares outstanding—Basic 50,338 53,074 53,502 Assumed exercise of stock options and awards 150 339 450 Assumed exercise of convertible note premium — — 6 Weighted average common shares outstanding—Diluted 50,488 53,413 53,958 Net Income Per Common Stock Share: Basic $ 4.63 $ 6.23 $ 4.19 Diluted $ 4.62 $ 6.19 $ 4.15

Short-Term Investments

Short-Term Investments	12 Months Ended
	Dec. 31, 2018
Short-term Investments [Abstract]
Short-Term Investments	Short-Term Investments Debt securities that are not classified as cash equivalents are classified as available-for-sale investments and are stated at fair value. Realized gains and losses on sales of investments are reflected in nonoperating income (expense). The following is a summary of short-term investments held as of December 31, 2018 and 2017 : December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) Corporate debt $ 142,748 $ 49 $ (695 ) $ 142,102 U.S. government and agency debt 37,163 3 (59 ) 37,107 Municipal bonds 9,903 — (32 ) 9,871 Other fixed income securities 43,183 2 (24 ) 43,161 Total short-term investments $ 232,997 $ 54 $ (810 ) $ 232,241 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) Corporate debt $ 165,610 $ 8 $ (535 ) $ 165,083 U.S. government and agency debt 59,054 1 (215 ) 58,840 Municipal bonds 21,517 — (104 ) 21,413 Other fixed income securities 23,973 1 (13 ) 23,961 Total short-term investments $ 270,154 $ 10 $ (867 ) $ 269,297 Contractual maturities of short-term investments as of December 31, 2018 are shown below. Under 1 Year 1 to 5 Years Total (in thousands) Corporate debt $ 69,957 $ 72,145 $ 142,102 U.S. government and agency debt 28,164 8,943 37,107 Municipal bonds 8,288 1,583 9,871 Other fixed income securities 35,990 7,171 43,161 Total short-term investments $ 142,399 $ 89,842 $ 232,241 The Company classifies investments as current assets as these securities are available for use in its current operations.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements ASC 820 defines fair value as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, ASC 820 establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows: Level 1 - Observable inputs such as quoted prices in active markets for identical assets or liabilities; Level 2 - Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term for the assets or liabilities; and Level 3 - Unobservable inputs in which there is little or no market data and that are significant to the fair value of the assets or liabilities. The following tables present information about the Company's financial assets and liabilities measured at fair value on a recurring basis: Fair Value Measurements as of December 31, 2018 Total Level 1 Level 2 Level 3 (in thousands) Cash equivalents $ 121,154 $ 42,175 $ 78,979 $ — Restricted cash — — — — Short-term investments 232,241 — 232,241 — Fuel derivative contracts: 1,572 — 1,572 — Foreign currency derivatives 4,579 — 4,579 — Total assets measured at fair value $ 359,546 $ 42,175 $ 317,371 $ — Foreign currency derivatives 1,347 — 1,347 — Total liabilities measured at fair value $ 1,347 $ — $ 1,347 $ — Fair Value Measurements as of December 31, 2017 Total Level 1 Level 2 Level 3 (in thousands) Cash equivalents $ 62,310 $ 27,807 $ 34,503 $ — Restricted cash 1,000 1,000 — — Short-term investments 269,297 — 269,297 — Fuel derivative contracts: Crude oil call options 20,272 — 20,272 — Jet fuel swaps 336 — 336 — Foreign currency derivatives 4,300 — 4,300 — Total assets measured at fair value $ 357,515 $ 28,807 $ 328,708 $ — Foreign currency derivatives 1,713 — 1,713 — Total liabilities measured at fair value $ 1,713 $ — $ 1,713 $ — Cash equivalents. The Company’s Level 1 cash equivalents consist of money market securities. The carrying amounts approximate fair value because of the short-term maturity of these assets and Level 2 cash equivalents consist of U.S. agency bonds, mutual funds, and commercial paper. These instruments are valued using quoted prices for similar assets in active markets. Restricted cash . The Company’s restricted cash consist of money market securities. Short-term investments. Short-term investments include corporate debt, U.S. government and agency debt, municipal bonds, and other fixed income securities. These instruments are valued using quoted prices for similar assets in active markets or other observable inputs. Fuel derivative contracts. The Company’s fuel derivative contracts consist of crude oil call options, which are not traded on a public exchange. The fair value of these instruments are determined based on inputs available or derived from public markets including contractual terms, market prices, yield curves, fuel price curves and measures of volatility, among others. Foreign currency derivatives. The Company’s foreign currency derivatives consist of Japanese Yen and Australian Dollar forward contracts and are valued based primarily on data readily observable in public markets. The table below presents the Company's debt (excluding obligations under capital leases and financing obligations) measured at fair value: Fair Value of Debt December 31, 2018 December 31, 2017 Carrying Fair Value Carrying Fair Value Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 (in thousands) (in thousands) $ 467,760 $ 461,805 $ — $ — $ 461,805 $ 433,072 $ 444,099 $ — $ — $ 444,099 The fair value estimates of the Company's debt were based on the discounted amount of future cash flows using the Company's current incremental rate of borrowing for similar obligations. The carrying amounts of cash, other receivables, and accounts payable approximate fair value due to the short-term nature of these financial instruments.

Financial Derivative Instrument

Financial Derivative Instruments	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Derivative Instruments	Financial Derivative Instruments The Company uses derivatives to manage risks associated with certain assets and liabilities arising from the potential adverse impact of fluctuations in global fuel prices, interest rates and foreign currencies. Fuel Risk Management The Company's operations are inherently dependent upon the price and availability of aircraft fuel. To manage economic risks associated with fluctuations in aircraft fuel prices, the Company periodically enters into derivative financial instruments. The Company uses a combination of derivative contracts to hedge its aircraft fuel expense. As of December 31, 2018 , the Company's portfolio comprised of crude oil call options, which were not designated as hedges under ASC Topic 815, Derivatives and Hedging (ASC 815), for hedge accounting treatment. As a result, any changes in fair value of these derivative instruments are adjusted through other nonoperating income (expense) in the period of change. The following table reflects the amount of realized and unrealized gains and losses recorded as nonoperating income (expense) in the Consolidated Statements of Operations. Year Ended December 31, 2018 2017 2016 (in thousands) Gains (losses) realized at settlement $ 25,563 $ (534 ) $ (27,572 ) Prior period unrealized amounts (11,792 ) (7,946 ) 39,731 Unrealized gains (losses) that will settle in future periods (8,181 ) 11,792 7,947 Gains on fuel derivatives recorded as Nonoperating income (expense) $ 5,590 $ 3,312 $ 20,106 Foreign Currency Exchange Rate Risk Management The Company is subject to foreign currency exchange rate risk due to revenues and expenses denominated in foreign currencies, with the primary exposures being the Japanese Yen and Australian Dollar. To manage exchange rate risk, the Company executes its international revenue and expense transactions in the same foreign currency to the extent practicable. The Company enters into foreign currency forward contracts to further manage the effects of fluctuating exchange rates. The effective portion of the gain or loss is reported as a component of AOCI and reclassified into earnings in the same period in which the related sales are recognized as passenger revenue. The effective portion of the foreign currency forward contracts represents the change in fair value of the hedge that offsets the change in the fair value of the hedged item. To the extent the change in the fair value of the hedge does not perfectly offset the change in the fair value of the hedged item, the ineffective portion of the hedge is immediately recognized as nonoperating income (expense). The Company believes that its foreign currency forward contracts will continue to be effective in offsetting changes in cash flow attributable to the hedged risk. The Company expects to reclassify a net gain of approximately $3.9 million into earnings over the next 12 months from AOCI based on the values at December 31, 2018 . The following tables present the gross fair value of asset and liability derivatives that are designated as hedging instruments under ASC 815 and derivatives that are not designated as hedging instruments under ASC 815, as well as the net derivative positions and location of the asset and liability balances within the Consolidated Balance Sheets. Derivative positions as of December 31, 2018 Balance Sheet Notional Amount Final Gross fair Gross fair Net (in thousands) (in thousands) Derivatives designated as hedges Foreign currency derivatives Prepaid expenses and other 15,933,550 Japanese Yen December 2019 $ 3,922 $ (915 ) $ 3,007 Long-term prepayments and other 4,491,350 Japanese Yen December 2020 633 (292 ) 341 Derivatives not designated as hedges Foreign currency derivatives Other accrued liabilities 832,900 Japanese Yen March 2019 24 (140 ) (116 ) Fuel derivative contracts Prepaid expenses and other 95,256 gallons December 2019 1,572 — 1,572 Derivative positions as of December 31, 2017 Balance Sheet Notional Amount Final Gross fair Gross fair Net (in thousands) (in thousands) Derivatives designated as hedges Foreign currency derivatives Prepaid expenses and other 16,732,375 Japanese Yen December 2018 $ 3,737 $ (1,441 ) $ 2,296 Long-term prepayments and other 4,666,700 Japanese Yen December 2019 546 (195 ) 351 Derivatives not designated as hedges Foreign currency derivatives Other accrued liabilities 866,150 Japanese Yen March 2018 17 (77 ) (60 ) Fuel derivative contracts Prepaid expenses and other 94,332 gallons December 2018 20,608 — 20,608 The following table reflects the impact of cash flow hedges designated for hedge accounting treatment and their location within the Consolidated Statements of Comprehensive Income. (Gain) Loss recognized in AOCI on derivatives (effective portion) (Gain) Loss reclassified from AOCI into income (effective portion) Gain recognized in nonoperating (income) expense (ineffective portion) Year ended December 31, Year ended December 31, Year ended December 31, 2018 2017 2016 2018 2017 2016 2018 2017 2016 (in thousands) Foreign currency derivatives $ (3,766 ) $ 6,983 $ (3,350 ) $ (1,380 ) $ (2,391 ) $ 196 $ — $ — $ — Interest rate derivatives — — 923 — — 944 — — — Risk and Collateral The financial derivative instruments expose the Company to possible credit loss in the event the counterparties to the agreements fail to meet their obligations. To manage such credit risks, the Company (1) selects its counterparties based on past experience and credit ratings, (2) limits its exposure to any single counterparty, and (3) periodically monitors the market position and credit rating of each counterparty. Credit risk is deemed to have a minimal impact on the fair value of the derivative instruments as cash collateral would be provided to or by the counterparties based on the current market exposure of the derivative. The Company's agreements with its counterparties also require the posting of cash collateral in the event the aggregate value of the Company's positions exceeds certain exposure thresholds. The aggregate fair value of the Company's derivative instruments that contain credit-risk related contingent features that are in a net asset position was $4.8 million and a net asset position of $23.2 million as of December 31, 2018 and December 31, 2017 , respectively. ASC 815 requires a reporting entity to elect a policy of whether to offset rights to reclaim cash collateral or obligations to return cash collateral against derivative assets and liabilities executed with the same counterparty under a master netting agreement, or present such amounts on a gross basis. The Company's accounting policy is to present its derivative assets and liabilities on a net basis, including any collateral posted with the counterparty. The Company had no collateral posted with its counterparties as of December 31, 2018 and December 31, 2017 . The Company is also subject to market risk in the event these financial instruments become less valuable in the market. However, changes in the fair value of the derivative instruments will generally offset the change in the fair value of the hedged item, limiting the Company's overall exposure.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets The following tables summarize the gross carrying values of intangible assets less accumulated amortization, and the useful lives assigned to each asset. As of December 31, 2018 Gross carrying Accumulated Net book value Approximate (in thousands) Favorable aircraft maintenance contracts $ 8,740 $ (8,284 ) $ 456 14 (*) Trade name 13,500 — 13,500 Indefinite Other 1,388 (1,195 ) 193 3 Total intangible assets $ 23,628 $ (9,479 ) $ 14,149 As of December 31, 2017 Gross carrying Accumulated Net book value Approximate (in thousands) Favorable aircraft maintenance contracts $ 8,740 $ (7,708 ) $ 1,032 14 (*) Trade name 13,500 — 13,500 Indefinite Other 1,388 (733 ) 655 3 Total intangible assets $ 23,628 $ (8,441 ) $ 15,187 _______________________________________________________________________________ (*) Weighted average is based on the gross carrying values and estimated useful lives as of June 2, 2005 (the date Hawaiian emerged from bankruptcy). Amortization expense related to the above intangible assets was $1.0 million , $1.2 million , and $2.3 million for the years ended December 31, 2018 , 2017 , and 2016 , respectively. Amortization of the favorable aircraft maintenance contracts are included in maintenance materials and repairs in the accompanying Consolidated Statements of Operations. As of December 31, 2018 , the estimated future amortization expense for intangible assets was $0.6 million , which will be recognized in 2019 .

Debt

Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt	Debt Long-term debt (including capital and financing lease obligations) net of unamortized discounts is outlined as follows: 2018 2017 (in thousands) Class A EETC, fixed interest rate of 3.9%, semiannual principal and interest payments, remaining balance due at maturity in January 2026(1) $ 245,845 $ 263,864 Class B EETC, fixed interest rate of 4.95%, semiannual principal and interest payments, remaining balance of due at maturity in January 2022(1) 88,608 94,580 Boeing 717-200 Aircraft Facility Agreements, fixed interest rate of 8%, monthly principal and interest payments, remaining balance due at maturity in June 2019(2) 50,376 74,629 Japanese Yen denominated financing, fixed interest rate of 1.05%, quarterly principal and interest payments, remaining balance due at maturity in May 2030 42,116 — Japanese Yen denominated financing, fixed interest rate of 1.01%, semiannual principal and interest payments, remaining balance due at maturity in June 2030 40,815 — Capital & Financing lease obligations (see Note 9) 252,517 149,039 Total debt, capital, and financing lease obligations $ 720,277 $ 582,112 Less: Unamortized debt discount and debt issuance costs (10,496 ) (11,441 ) Current maturities (101,097 ) (59,470 ) Long-Term Debt, less discount, Capital, and Financing Lease Obligations $ 608,684 $ 511,201 _______________________________________________________________________________ (1) The equipment notes underlying these EETCs are the direct obligations of Hawaiian. (2) Aircraft Facility Agreements are secured by aircraft. Enhanced Equipment Trust Certificates (EETC) In 2013, Hawaiian consummated an EETC financing, whereby it created two pass-through trusts, each of which issued pass-through certificates. The proceeds of the issuance of the pass-through certificates were used to purchase equipment notes issued by the Company to fund a portion of the purchase price for six Airbus aircraft, all of which were delivered in 2013 and 2014. The equipment notes are secured by a lien on the aircraft, and the payment obligations of Hawaiian under the equipment notes will be fully and unconditionally guaranteed by the Company. The Company issued the equipment notes to the trusts as aircraft were delivered to Hawaiian. Hawaiian received all proceeds from the pass-through trusts by 2014 and recorded the debt obligation upon issuance of the equipment notes rather than upon the initial issuance of the pass-through certificates. The Company evaluated whether the pass-through trusts formed are variable interest entities ("VIEs") required to be consolidated by the Company under applicable accounting guidance, and determined that the pass-through trusts are VIEs. The Company determined that it does not have a variable interest in the pass-through trusts. Neither the Company nor Hawaiian invested in or obtained a financial interest in the pass-through trusts. Rather, Hawaiian has an obligation to make interest and principal payments on it equipment notes held by the pass-through trusts, which are fully and unconditionally guaranteed by the Company. Neither the Company nor Hawaiian intends to have any voting or non-voting equity interest in the pass-through trusts or to absorb variability from the pass-through trusts. Based on this analysis, the Company determined that it is not required to consolidate the pass-through trusts. Foreign Denominated Financing In 2018, the Company entered into two Japanese Yen denominated financings with a total value of approximately $86.5 million ( ¥9.6 billion ), collateralized by the aircraft financed. Each financing is for a term of 12 years with quarterly or semiannual principal and interest payments, respectively, at fixed installment coupon rates of 1.01% and 1.05% , respectively. The fluctuation in foreign exchange rates at each balance sheet date is reflected within the nonoperating income (expense) line item in the Consolidated Statements of Operations. During 2018, the Company recorded foreign currency unrealized losses of $0.4 million. Debt Extinguishment In 2018 and 2017, the Company had no debt extinguishment activity. In 2016, Hawaiian extinguished $140.5 million of its existing debt under secured financing agreements, which were originally scheduled to mature in 2022 and 2023. This debt extinguishment resulted in a loss of $10.0 million , which is reflected in nonoperating income (expense) in the Consolidated Statement of Operations. Revolving Credit Facility In December 2018, Hawaiian amended and restated the existing credit agreement with Citigroup Global Markets Inc., increasing the secured revolving credit and letter (Revolving Credit Facility) from $225 million to $235 million . This Revolving Credit Facility will mature in December 2022 and has a 12 -month renewal option. This was accounted for as a modification of the existing agreement and approximately $0.6 million in unamortized costs will be amortized over the amended term along with additional issuance costs for the renewal of $2.0 million . Hawaiian may, from time to time, grant liens on certain eligible account receivables, aircraft, spare engines, ground support equipment and route authorities, as well as cash and certain cash equivalents, in order to secure its outstanding obligations under the Revolving Credit Facility. Indebtedness under the Revolving Credit Facility will bear interest, at a per annum rate based on, at Hawaiian's option: (1) a variable rate equal to the London interbank offer rate plus a margin of 2.0% ; or (2) Alternate base rate (as defined in the Revolving Credit Facility) plus a margin of 1.0% . Hawaiian is also subject to compliance and liquidity covenants under the Revolving Credit Facility. As of December 31, 2018 , the Company had no outstanding borrowing under the Revolving Credit Facility. Schedule of Maturities of Long-Term Debt As of December 31, 2018 , the scheduled maturities of long-term debt are as follows (in thousands): 2019 $ 81,075 2020 29,597 2021 56,557 2022 63,665 2023 28,466 Thereafter 208,400 $ 467,760

Leases

Leases	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Leases	Leases As of December 31, 2018 , the Company had lease contracts for 22 of its 66 aircraft. Of the 22 lease contracts, 5 aircraft lease contracts were accounted for as capital leases, with the remaining 17 lease contracts accounted for as operating leases. These aircraft leases have remaining lease terms ranging from approximately less than 1 year to 10 years . As of December 31, 2018 , the scheduled future minimum rental payments under capital leases and operating leases with non-cancellable basic terms of more than one year are as follows: Capital & Financing Leases Operating Leases Aircraft Other Aircraft Other (in thousands) 2019 $ 24,850 $ 7,909 $ 106,448 $ 5,730 2020 24,850 5,908 90,417 5,709 2021 24,850 4,630 74,315 5,846 2022 24,705 4,870 68,208 5,930 2023 21,370 8,207 59,925 5,975 Thereafter 75,891 111,651 159,271 89,699 196,516 143,175 $ 558,584 $ 118,889 Less amounts representing interest (35,502 ) (51,672 ) Present value of minimum capital & financing lease payments $ 161,014 $ 91,503 Maintenance Hangar In November 2016, the Company entered into a lease agreement with the Department of Transportation of the State of Hawai'i to lease a cargo and maintenance hangar at the Daniel K. Inouye International Airport with a lease term of 35 years. As the hangar was not fully constructed, the Company took responsibility of the construction and was responsible for the remainder of the construction costs of $33.3 million . In accordance with the applicable accounting guidance, specifically as it relates to the Company's involvement in the construction of the hangar, the Company was considered the owner of the asset under construction and has recognized an additional $73.0 million asset, with a corresponding lease liability, for the amount previously spent by the lessor. The Company placed the hangar into service in late 2017. The $73.0 million liability is relieved as the Company makes rental payments under the agreement and the $106.3 million asset (the original $73.0 million plus an additional $33.3 million of asset additions), is depreciated over the lease term.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes On December 22, 2017, the Tax Act was enacted into law, which significantly changed existing U.S. tax law and reduced the U.S. federal corporate tax from 35% to 21%. The Company recognized a one-time benefit of $83.0 million during the year ended December 31, 2017 from the impact of the revaluation of deferred tax assets and liabilities. During the year ended December 31, 2018 , the Company completed its accounting for the effects of the Tax Act and recorded an additional tax benefit of $9.3 million primarily related to deductions for additional pension contributions made in 2018 for the 2017 Plan year. The significant components of income tax expense are as follows: Years Ended December 31, 2018 2017 2016 (in thousands) Current Federal $ 23,438 $ 49,835 $ 94,459 State 9,087 11,471 13,201 $ 32,525 $ 61,306 $ 107,660 Deferred Federal $ 29,782 $ (7,017 ) $ 25,948 State 5,651 5,922 3,491 $ 35,433 $ (1,095 ) $ 29,439 Income tax expense $ 67,958 $ 60,211 $ 137,099 The income tax expense differed from amounts computed at the statutory federal income tax rate as follows: Years Ended December 31, 2018 2017 2016 (in thousands) Income tax expense computed at the statutory federal rate $ 63,243 $ 136,788 $ 126,427 Increase (decrease) resulting from: State income taxes, net of federal tax effect 11,643 11,095 10,714 Nondeductible meals 797 1,146 1,100 Tax Cuts and Jobs Act impact (9,333 ) (82,978 ) — Excess tax benefits from stock issuance (188 ) (5,288 ) — Other 1,796 (552 ) (1,142 ) Income tax expense $ 67,958 $ 60,211 $ 137,099 The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income (including the reversal of deferred tax liabilities) during the periods in which those deferred tax assets will become deductible. The Company's management assesses the realizability of its deferred tax assets, and records a valuation allowance when it is more likely than not that a portion, or all, of the deferred tax assets will not be realized. The components of the Company's deferred tax assets and liabilities were as follows: December 31, 2018 2017 (in thousands) Deferred tax assets: Accumulated pension and other postretirement benefits $ 45,663 $ 54,784 Leases 3,515 4,490 Air traffic liability and frequent flyer liability 70,206 53,102 Partnership deferred revenue 9,697 2,455 State net operating loss carryforwards 2,547 2,547 Accrued compensation 15,843 7,627 Other accrued assets 11,758 11,661 Fuel derivative contracts 2,390 2,156 Other assets 14,031 10,187 Total gross deferred tax assets 175,650 149,009 Less: Valuation allowance (2,547 ) (2,547 ) Net deferred tax assets $ 173,103 $ 146,462 Deferred tax liabilities: Intangible assets $ (3,297 ) $ (3,432 ) Property and equipment, principally accelerated depreciation (324,614 ) (265,293 ) Other liabilities (12,962 ) (11,878 ) Total deferred tax liabilities (340,873 ) (280,603 ) Net deferred tax liability $ (167,770 ) $ (134,141 ) As of December 31, 2018 and 2017, the Company had available for state income tax purposes net operating loss carryforwards of $73.3 million , respectively. The tax benefit of the net operating loss carryforwards as of December 31, 2018 was $2.5 million , all of which has a valuation allowance. In accordance with ASC 740, the Company reviews its uncertain tax positions on an ongoing basis. The Company may be required to adjust its liability as these matters are finalized, which could increase or decrease its income tax expense and effective income tax rates or result in an adjustment to the valuation allowance. The Company does not expect that the unrecognized tax benefit related to uncertain tax positions will significantly change within the next 12 months. The table below reconciles beginning and ending amounts of unrecognized tax benefits related to uncertain tax positions: 2018 2017 2016 (in thousands) Balance at January 1 $ 4,081 $ 3,329 $ — Increases related to prior year tax positions 336 253 2,830 Increases related to current year tax positions 669 499 499 Balance at December 31 $ 5,086 $ 4,081 $ 3,329 The Company's policy is to include interest and penalties related to unrecognized tax benefits within the provision for income taxes. No interest or penalties related to these positions were accrued as of December 31, 2018 . The Company files its tax returns as prescribed by the tax laws of the jurisdictions in which it operates. The Company's federal and state income tax returns for tax years 2015 and beyond remain subject to examination by the Internal Revenue Service.

Contract Termination Expense an

Contract Termination Expense and Special Items	12 Months Ended
	Dec. 31, 2018
Unusual or Infrequent Items, or Both [Abstract]
Contract Termination Expense and Special Items	Contract Terminations Expense and Special Items Contract terminations expense and special items in the statements of consolidated operations consisted of the following: Year Ended December 31, 2018 2017 2016 (in thousands) Operating Contract terminations expense (1) $ 35,322 $ — $ — Operating special items: Loss on sale of aircraft (3) — 4,771 — Collective bargaining agreement (4)(6) — 18,679 38,781 Impairment charge in connection with its owned Boeing 767-300 fleet and related assets (5) — — 49,361 Termination of Boeing 767-300 engine maintenance contract (7) — — 21,000 Total Contract terminations expense and Operating special items $ 35,322 $ 23,450 $ 109,142 Nonoperating Other nonoperating special items: Partial settlement and curtailment loss (2) $ — $ 10,384 $ — Loss on plan termination (2) — 35,201 — Total Other nonoperating special items $ — $ 45,585 $ — Contract terminations expense (1) During the twelve months ended December 31, 2018, the Company terminated two contracts which incurred a total of $35.3 million in contract terminations expense. The transactions are described below: In February 2018, the Company exercised its right to terminate the aircraft purchase agreement between the Company and Airbus for six Airbus A330-800neo aircraft and the purchase rights for an additional six Airbus A330-800neo aircraft. To terminate the purchase agreement, the Company was obligated to repay Airbus for concessions received relating to a prior firm order, training credits, as well as forfeit the pre-delivery progress payments made towards the flight equipment. The Company recorded a contract terminations expense to reflect a portion of the termination penalty within the Consolidated Statements of Operations. In January 2018, the Company entered into a transaction with its lessor to early terminate and purchase three Boeing 767-300 aircraft leases and concurrently entered into a forward sale agreement for the same three Boeing 767-300 aircraft, including two Pratt & Whitney 4060 engines for each aircraft. These aircraft were previously accounted for as operating leases. In order to exit the lease and purchase the aircraft, the Company agreed to pay a total of $67.1 million (net of all deposits) of which a portion was expensed immediately and recognized as a contract termination fee. The expensed amount represents the total purchase price amount over fair value of the aircraft purchased as of the date of the transaction. Special items (2) In August 2017, the Company terminated the Hawaiian Airlines, Inc. Salaried & IAM Merged Pension Plan (the Merged Plan) and settled a portion of its pilots' other post-retirement medical plan liability. In connection with the reduction of these liabilities, the Company recorded one-time Other nonoperating special charges of $35.2 million related to the Merged Plan termination and $10.4 million related to the other post-retirement (OPEB) medical plan partial settlement. (3) In April 2017, the Company executed a sale leaseback transaction with an independent third party for three Boeing 767-300 aircraft. The lease terms for the three aircraft commenced in April 2017 and end between November 2018 through January 2019. During the twelve months ended December 31, 2017, the Company recorded a loss on sale of aircraft of $4.8 million . (4) In February 2017, the Company reached a tentative agreement with ALPA, covering the Company's pilots. In March 2017, the Company received notice from ALPA that the agreement was ratified by ALPA's members. The agreement became effective April 1, 2017 and has a term of 63 months. The agreement includes, among other various benefits, a pay adjustment and ratification bonus computed based on previous service. During the twelve months ended December 31, 2017, the Company expensed $18.7 million principally related to a one-time payment to reduce the Company's future 401K employer contribution for certain pilot groups, which is not recoverable once paid. (5) The impairment analysis and ultimate charge was triggered by the decision in the fourth quarter of 2016 to exit the Boeing 767-300 fleet in 2018. The early exit of the Boeing 767-300 fleet was made possible by the Company's decision to acquire one Airbus A330-200 (delivered in 2017), lease two additional Airbus A321neo's (delivered in 2018 and in addition to the Company's existing aircraft orders), and the Company's ability to early terminate its long-term power-by-the-hour maintenance contract for the Boeing 767-300 fleet. This fleet change allows the Company to streamline the fleet, simplify operations, and potentially reduce costs in the future. In order to assess whether there was an impairment of the Boeing 767-300 asset group, the Company compared the projected undiscounted cash flows of the fleet to the book value of the assets and determined the book value was in excess of the undiscounted cash flows. The Company estimated the fair value of the owned Boeing 767-300 fleet assets using third party pricing information and quotes from potential buyers, which resulted in a $49.4 million impairment charge ( $0.92 per diluted share). The Company's determination of fair value considered attributes specific to the owned Boeing 767-300 fleet and aircraft condition (e.g. age, maintenance requirements, cycles, etc.). (6) In 2016, the Company accrued $34.0 million associated with the tentative agreement with ALPA related to past service (prior to January 1, 2017) and also elected to pay a $4.8 million profit sharing bonus payment to other labor groups related to prior period service. (7) In connection with the decision to exit the Boeing 767-300 fleet, the Company negotiated a termination of its Boeing 767-300 maintenance agreement and recorded a $21.0 million charge related to the amount paid to terminate the contract.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans Defined Benefit Plans Hawaiian sponsors a defined benefit pension plan covering the Air Line Pilots Association (ALPA) and prior to August 2017, sponsored the defined benefit pension plans for the International Association of Machinists and Aerospace Workers (AFL-CIO) (IAM) and other personnel (salaried, Transport Workers Union, Network Engineering Group). The plans for the IAM and other employees were frozen in September 1993. Effective January 1, 2008, benefit accruals for pilots under age 50 as of July 1, 2005 were frozen (with the exception of certain pilots who were both age 50 and older and participants of the plan on July 1, 2005) and Hawaiian began making contributions to an alternate defined contribution retirement program for its pilots. All of the pilots' accrued benefits under their defined benefit plan at the date of the freeze were preserved. In addition, Hawaiian sponsors four unfunded defined benefit postretirement medical and life insurance plans and a separate plan to administer the pilots' disability benefits. In 2016, the Hawaiian Airlines, Inc. Pension Plan for Salaried Employees (Salaried Plan) was consolidated into the Hawaiian Airlines, Inc. Pension Plan for Employees Represented by the International Association of Machinists (IAM), which established the Hawaiian Airlines, Inc. Salaried & IAM Merged Pension Plan (the Merged Plan). At that time, the net liabilities of the Salaried Plan were transferred to the Merged Plan. In August 2017, the Company completed the termination of the plan by transferring the assets and liabilities to a third-party insurance company. In 2017, the Company contributed a total of $18.5 million in cash to fully fund the plan and recognized a one-time financial loss of $35.2 million as an Other nonoperating special item on the Company's Consolidated Statement of Operations. The Company no longer has any expected contributions to the Merged Plan due to the final settlement. In March 2017, the Company announced the ratification of a 63 -month contract amendment with its pilots as represented by the Air Line Pilots Association (ALPA). In connection with the ratification of the agreement, the parties agreed to eliminate the post-65 post-retirement medical benefit for all active pilots, and replace the benefit with a heath retirement account (HRA) managed by ALPA, which represented a curtailment and partial settlement of the pilots' other post-retirement benefit plan. In August 2017, the Company made a one-time cash payment of $101.9 million to fund the HRA and settle the post-65 post-retirement medical plan obligation (for active pilots as of April 1, 2017). The cash contributed was distributed to the trust funding the individual health retirement notional accounts of the participants. In connection with the settlement of the liability, the discount rate was updated to 3.86% . The Company recognized a one-time settlement loss of $10.4 million . The obligation recorded for the unsettled portion of this plan was $73.4 million as of the partial settlement date. The following tables summarize changes to projected benefit obligations, plan assets, funded status and applicable amounts included in the Consolidated Balance Sheets: 2018 2017 Pension Other Pension Other (in thousands) Change in benefit obligations Benefit obligations, beginning of year $ (426,066 ) $ (120,417 ) $ (462,762 ) $ (224,316 ) Service cost (352 ) (8,119 ) (480 ) (12,403 ) Interest cost (15,599 ) (4,708 ) (18,042 ) (8,022 ) Actuarial gains (losses) 22,677 6,007 (42,775 ) 17,484 Benefits paid 21,253 4,639 23,999 4,587 Less: federal subsidy on benefits paid N/A (50 ) N/A (57 ) Plan amendments — — — 381 Settlements — — 73,994 101,929 Benefit obligation at end of year (a) $ (398,087 ) $ (122,648 ) $ (426,066 ) $ (120,417 ) Change in plan assets Fair value of assets, beginning of year $ 296,386 $ 26,078 $ 302,982 $ 24,751 Actual return on plan assets (17,339 ) (1,697 ) 42,652 2,629 Employer contribution 50,230 6,621 48,745 3,285 Benefits paid (21,253 ) (4,639 ) (23,999 ) (4,587 ) Settlements — — (73,994 ) — Fair value of assets at end of year $ 308,024 $ 26,363 $ 296,386 $ 26,078 Unfunded status at December 31 $ (90,063 ) $ (96,285 ) $ (129,680 ) $ (94,339 ) Amounts recognized in the statement of financial position consist of: Current benefit liability $ (386 ) $ (3,342 ) $ (214 ) $ (3,017 ) Noncurrent benefit liability (89,677 ) (92,943 ) (129,466 ) (91,322 ) $ (90,063 ) $ (96,285 ) $ (129,680 ) $ (94,339 ) Amounts recognized in accumulated other comprehensive loss Unamortized actuarial loss (gain) $ 124,560 $ (15,606 ) $ 112,417 $ (13,521 ) Prior service cost (credit) — 1,737 — 1,962 $ 124,560 $ (13,869 ) $ 112,417 $ (11,559 ) _______________________________________________________________________________ (a) The accumulated pension benefit obligation as of December 31, 2018 and 2017 was $397.5 million and $424.2 million , respectively. The following table sets forth the net periodic benefit cost: 2018 2017 2016 Pension Other Pension Other Pension Other (in thousands) Components of Net Periodic Benefit Cost Service cost $ 352 $ 8,119 $ 480 $ 12,403 $ 681 $ 13,618 Other cost: Interest cost 15,599 4,708 18,042 8,022 19,969 10,227 Expected return on plan assets (20,948 ) (1,413 ) (17,291 ) (1,106 ) (16,746 ) (1,137 ) Recognized net actuarial loss (gain) 3,482 (774 ) 9,033 (241 ) 7,526 204 Prior service cost (credit) — 225 (28 ) 282 (2 ) 229 Total other components of the net periodic benefit cost $ (1,867 ) $ 2,746 $ 9,756 $ 6,957 $ 10,747 $ 9,523 Settlement and curtailment loss — — 35,201 10,384 — — Net periodic benefit cost $ (1,515 ) $ 10,865 $ 45,437 $ 29,744 $ 11,428 $ 23,141 Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss Current year actuarial (gain) loss $ 15,625 $ (2,858 ) $ 17,414 $ (18,972 ) $ 25,559 $ (7,677 ) Current year prior service cost — — — (381 ) (932 ) — Amortization of actuarial gain (loss) (3,482 ) 774 (9,033 ) 241 (7,526 ) (204 ) Amortization of prior service credit (cost) — (225 ) 28 (282 ) 2 (229 ) Settlement and curtailment loss — — (35,201 ) (10,384 ) — — Total recognized in other comprehensive loss $ 12,143 $ (2,309 ) $ (26,792 ) $ (29,778 ) $ 17,103 $ (8,110 ) Total recognized in net periodic benefit cost and other comprehensive loss $ 10,628 $ 8,556 $ 18,645 $ (34 ) $ 28,531 $ 15,031 The weighted average actuarial assumptions used to determine the net periodic benefit expense and the projected benefit obligation were as follows: Pension Postretirement Disability 2018 2017 2018 2017 2018 2017 Discount rate to determine net periodic benefit expense 3.70 % 4.19 % 3.71 % 4.29 % 3.72 % 4.24 % Discount rate to determine projected benefit obligation 4.35 % 3.70 % 4.36 % 3.71 % 4.39 % 3.72 % Expected return on plan assets 7.33 % ** 6.34 % N/A N/A 4.90 % ** 4.60 % Rate of compensation increase Various * Various * N/A N/A Various * Various * Health care trend rate to determine net periodic benefit expense N/A N/A 7.25 % 7.75 % N/A N/A Ultimate trend rate N/A N/A 4.75 % 7.25 % N/A N/A Years to reach ultimate trend rate N/A N/A 5 6 N/A N/A Health care trend rate to determine projected benefit obligation N/A N/A 6.75 % 7.25 % N/A N/A Ultimate trend rate N/A N/A 4.75 % 4.75 % N/A N/A Years to reach ultimate trend rate N/A N/A 4 5 N/A N/A _______________________________________________________________________________ * Differs for each pilot based on current fleet and seat position on the aircraft and seniority service. Negotiated salary increases and expected changes in fleet and seat positions on the aircraft are included in the assumed rate of compensation increase, which ranged from 2.0% to 7.3% in both 2018 and 2017 ). ** Expected return on plan assets used to determine the net periodic benefit expense for 2019 is 6.91% for Pension and 4.90% for Disability. A change in the assumed health care cost trend rates would have the following effects: 100 Basis 100 Basis (in thousands) Effect on postretirement benefit obligation at December 31, 2018 $ 8,048 $ (6,916 ) Effect on total service and interest cost for the year ended December 31, 2018 892 (744 ) Estimated amounts that will be amortized from accumulated other comprehensive income into net periodic benefit cost in 2019 are as follows: Pension Other (in thousands) Actuarial (gain) loss $ 4,031 $ (707 ) Amortization of prior service cost — 225 To be recognized in net periodic benefit cost from accumulated other comprehensive (gain) loss $ 4,031 $ (482 ) Plan Assets The Company develops the expected long-term rate of return assumption based on historical experience and by evaluating input from the trustee managing the plan's assets, including the trustee's review of asset class return expectations by several consultants and economists, as well as long-term inflation assumptions. The Company's expected long-term rate of return on plan assets is based on a target allocation of assets, which is based on the goal of earning the highest rate of return while maintaining risk at acceptable levels. The Retirement Plan for Pilots of Hawaiian Airlines, Inc. and the Pilot's Voluntary Employee Beneficiary Association Disability and Survivor's Benefit Plan (VEBA) strive to have assets sufficiently diversified so that adverse or unexpected results from any one security class will not have an unduly detrimental impact on the entire portfolio. Prior to termination, the Merged Plan targeted to have its assets align with the potential liability as of the expected settlement date. The actual allocation of the Company's pension and disability plan assets and the target allocation of assets by category at December 31, 2018 are as follows: Asset Allocation for Pilots pension and VEBA Plans 2018 Target Equity securities 57 % 60 % Fixed income securities 39 % 35 % Real estate investment trusts 4 % 5 % 100 % 100 % The table below presents the fair value of the Company's pension plan and other postretirement plan investments (excluding cash and receivables): Fair Value Measurements as of December 31, 2018 2017 (in thousands) Pension Plan Assets: Equity index funds $ 175,583 $ 177,252 Fixed income funds 110,650 100,504 Real estate investment fund 14,718 14,587 Insurance company pooled separate account 7,076 4,044 Total $ 308,027 $ 296,387 Postretirement Assets: Common collective trust fund $ 26,217 $ 25,973 The fair value of the investments in the table above have been estimated using the net asset value per share, and in accordance with subtopic ASC 820-10, Fair Value Measurement and Disclosures , are not required to be presented in the fair value hierarchy. Equity index funds. The investment objective of these funds are to obtain a reasonable rate of return while investing principally or entirely in foreign or domestic equity securities. There are currently no redemption restrictions on these investments. Fixed income funds. The investment objective of these funds are to obtain a reasonable rate of return while principally investing in foreign and domestic bonds, mortgage-backed securities, and asset-backed securities. There are currently no redemption restrictions on these investments. Real estate investment fund. The investment objective of this fund is to obtain a reasonable rate of return while principally investing in real estate investment trusts. There are currently no redemption restrictions on these investments. Insurance Company Pooled Separate Account. The investment objective of the Insurance Company Pooled Separate Account is to invest in short-term cash equivalent securities to provide a high current income consistent with the preservation of principal and liquidity. Common collective trust (CCT). The postretirement plan's CCT investment consists of a balanced profile fund and a conservative profile fund. These funds primarily invest in mutual funds and exchange-traded funds. The balanced profile fund is designed for participating trusts that seek substantial capital growth, place modest emphasis on short-term stability, have long-term investment objectives, and accept short-term volatility in the value of the fund's portfolio. The conservative profile fund is designed for participating trusts that place modest emphasis on capital growth, place moderate emphasis on short-term stability, have intermediate-to-long-term investment objectives, and accept moderate short-term volatility in the value of the fund's portfolio. There are currently no redemption restrictions on these investments. Based on current legislation and current assumptions, the contribution that the Company expects to have a minimum contribution requirement of nil for 2019 . The Company projects that Hawaiian's pension plans and other postretirement benefit plans will make the following benefit payments, which reflect expected future service, during the years ending December 31: Other Benefits Pension Gross Expected (in thousands) 2019 $ 23,343 $ 5,254 $ (47 ) 2020 24,471 6,040 (51 ) 2021 25,252 6,848 (54 ) 2022 25,730 7,425 (56 ) 2023 26,189 8,051 (58 ) 2024 - 2028 132,395 47,804 (304 ) $ 257,380 $ 81,422 $ (570 ) Defined Contribution Plans The Company also sponsors separate defined contribution plans for its pilots, flight attendants and ground, and salaried personnel. Contributions to the Company's defined contribution plans were $42.0 million , $39.1 million and $31.6 million for the years ended December 31, 2018 , 2017 and 2016 , respectively.

Capital Stock and Share-based C

Capital Stock and Share-based Compensation	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Capital Stock and Share-based Compensation	Capital Stock and Share-based Compensation Common Stock The Company has one class of common stock issued and outstanding. Each share of common stock is entitled to one vote per share. Special Preferred Stock The IAM, AFA, and ALPA each hold one share of Special Preferred Stock, which entitles each union to nominate one director to the Company's Board of Directors. In addition, each series of the Special Preferred Stock, unless otherwise specified: (i) ranks senior to the Company's common stock and ranks pari passu with each other series of Special Preferred Stock with respect to liquidation, dissolution and winding up of the Company and will be entitled to receive $0.01 per share before any payments are made, or assets distributed to holders of any stock ranking junior to the Special Preferred Stock; (ii) has no dividend rights unless a dividend is declared and paid on the Company's common stock, in which case the Special Preferred Stock would be entitled to receive a dividend in an amount per share equal to two times the dividend per share paid on the common stock; (iii) is entitled to one vote per share of such series and votes with the common stock as a single class on all matters submitted to holders of the Company's common stock; and (iv) automatically converts into the Company's common stock on a 1 :1 basis, at such time as such shares are transferred or such holders are no longer entitled to nominate a representative to the Company's Board of Directors pursuant to their respective collective bargaining agreements. Dividends The Company paid dividends of $24.2 million and $6.3 million during the years ended December 31, 2018 and 2017 , respectively, and no dividends were paid by the Company during year ended December 31, 2016 . In February 2019, the Company announced that its Board of Directors declared a quarterly cash dividend of $0.12 per share payable on February 22, 2019 , to stockholders of record as of February 8, 2019 . The Company's dividend payments may change from time to time. The Company cannot provide assurance that it will continue to declare dividends for any fixed period and payment of dividends may be suspended at any time at its discretion. Stock Repurchase Program In November 2017, the Company's Board of Directors approved the repurchase of up to $100 million of its outstanding common stock over a two -year period through December 2019 via the open market, established plans or privately negotiated transactions in accordance with all applicable securities laws, rules and regulations, which was completed in December 2018. In November 2018, the Company's Board of Directors approved a new stock repurchase program pursuant to which the Company may repurchase up to an additional $100 million of its outstanding common stock over a two -year period through December 2020. The stock repurchase program is subject to modification or termination at any time. In 2018 , the Company spent $102.5 million to repurchase approximately 2.8 million shares of the Company's common stock in open market transactions, completing its November 2017 repurchase authorization. In 2017 , the Company spent $100.0 million to repurchase approximately 2.5 million shares of the Company's common stock in open market transactions. As of December 31, 2018 , the Company has $97.5 million remaining to spend under its stock repurchase program. See Part II, Item 5, “Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities” of this report for additional information on the stock repurchase program. Share-Based Compensation Total share-based compensation expense recognized by the Company under ASC 718 was $5.3 million , $7.3 million and $8.4 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. As of December 31, 2018 , $5.4 million of share-based compensation expense related to unvested stock options and other stock awards (inclusive of $0.4 million for stock awards granted to non-employee directors) attributable to future performance and has not yet been recognized. The related expense will be recognized over a weighted average period of approximately 1.3 years. Performance-Based Stock Awards During 2018 , the Company granted performance-based stock awards covering 83,293 shares of common stock (the Target Award) with a maximum payout of 166,586 shares of common stock (the Maximum Award) to employees pursuant to the Company's 2015 Stock Incentive Plan. These awards vest over a three year period. The Company valued the performance-based stock awards using grant date fair values equal to the Company's share price on the measurement date. The following table summarizes information about performance-based stock awards: Number of units Weighted Non-vested at January 1, 2016 678,742 $ 10.53 Granted 117,849 33.94 Vested (349,403 ) 7.32 Forfeited (24,891 ) 13.45 Non-vested at December 31, 2016 422,297 $ 14.00 Granted 355,897 43.51 Vested (358,619 ) 12.71 Forfeited (37,619 ) 27.60 Non-vested at December 31, 2017 381,956 $ 28.03 Granted 160,348 39.09 Vested (211,053 ) 26.28 Forfeited (69,399 ) 39.42 Non-vested at December 31, 2018 261,852 $ 33.01 In 2018 , there were 77,055 additional shares from a prior year grant that the performance metric was achieved and vested, thus included in the 2018 amounts. The fair value of performance-based stock awards vested in the years ended December 31, 2018 , 2017 and 2016 was $8.2 million , $17.9 million and $11.3 million , respectively. Fair value of the awards are based on the stock price on date of vest. Service-Based Stock Awards During 2018 , the Company awarded 128,617 service-based stock awards to employees and non-employee directors, pursuant to the Company's 2015 Stock Incentive Plan. These stock awards vest over one , two , or three year periods and have a grant date fair value equal to the Company's share price on the measurement date. The following table summarizes information about outstanding service-based stock awards: Number of units Weighted Non-vested at January 1, 2016 270,721 $ 15.02 Granted 110,276 37.08 Vested (169,218 ) 16.32 Forfeited (16,330 ) 20.46 Non-vested at December 31, 2016 195,449 $ 24.29 Granted 22,898 49.95 Vested (110,575 ) 23.80 Forfeited (16,394 ) 26.71 Non-vested at December 31, 2017 91,378 $ 28.12 Granted 128,617 38.71 Vested (68,803 ) 38.98 Forfeited (8,241 ) 38.03 Non-vested at December 31, 2018 142,951 $ 38.77 The fair value of service-based stock awards vested in 2018 , 2017 , and 2016 was $2.7 million , $5.6 million and $6.1 million , respectively. Fair value of the awards are based on the stock price on date of vest.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Commitments and Contingent Liabilities Commitments The Company has commitments with a third-party to provide aircraft maintenance services which include fixed payments as well as variable payments based on flight hours for the Company's Airbus fleet through 2027. The Company also has commitments with third-party service providers for reservations, IT, and accounting services through 2024. Committed capital and other expenditures include escalation and variable amounts based on estimated forecasts. The gross committed expenditures for upcoming aircraft deliveries and other commitments for the next five years and thereafter are detailed below: Aircraft and aircraft related Other Total Committed (in thousands) 2019 $ 330,089 $ 74,621 $ 404,710 2020 162,270 69,729 231,999 2021 303,184 66,104 369,288 2022 431,210 58,499 489,709 2023 236,639 53,357 289,996 Thereafter 477,788 164,846 642,634 $ 1,941,180 $ 487,156 $ 2,428,336 As of December 31, 2018 , the Company had the following capital commitments consisting of firm aircraft and engine orders and purchase rights: Aircraft Type Firm Purchase Expected Delivery Dates A321neo aircraft 7 3 Between 2019 and 2020 B787-9 aircraft 10 10 Between 2021 and 2025 Pratt & Whitney spare engines: A321neo spare engines 1 2 In 2019 General Electric GEnx spare engines: B787-9 spare engines 2 2 Between 2021 and 2025 In February 2018, the Company exercised its right to terminate its aircraft purchase agreement between the Company and Airbus for six Airbus A330-800neo aircraft and the purchase rights for an additional six Airbus A330-800neo aircraft. Refer to Note 11 below for discussion on the contract termination charge. In July 2018, the Company entered into a purchase agreement for the purchase of ten Boeing 787-9 "Dreamliner" aircraft with purchase rights for an additional 10 aircraft with scheduled delivery from 2021 to 2025. In October 2018, the Company entered into a definitive agreement for the selection of GEnx engines to power its Boeing 787-9 fleet. The agreement provides for the purchase of 20 GEnx engines, the right to purchase an additional 20 GEnx engines and the purchase of up to four spare engines. In December 2018, the Company entered into an amendment to the purchase agreement with Boeing, which includes an option for the Company to accelerate delivery of B787-9 aircraft from 2024 and 2025 to 2023; however, the Company does not currently expect to execute the option to accelerate its planned delivery schedule. The committed expenditures under these agreements are reflected in the table above. The Company also intends to enter into additional related agreements in connection with the Boeing 787-9 purchases, including for the purchase of a flight simulator, spare parts and materials, and related services. In order to complete the purchase of these aircraft and fund related costs, the Company may need to secure acceptable financing. The Company has backstop financing available from aircraft and engine manufacturers, subject to certain customary conditions. Financing may be necessary to satisfy our capital commitments for firm order aircraft and other related capital expenditures. The Company can provide no assurance that any financing not already in place for aircraft and spare engine deliveries will be available to us on acceptable terms when necessary or at all. Litigation and Contingencies The Company is subject to legal proceedings arising in the normal course of its operations. Management does not anticipate that the disposition of any currently pending proceeding will have a material effect on the Company's operations, business or financial condition. General Guarantees and Indemnifications In the normal course of business, the Company enters into numerous aircraft financing and real estate leasing arrangements that have various guarantees included in the contract. It is common in such lease transactions for the lessee to agree to indemnify the lessor and other related third-parties for tort liabilities that arise out of or relate to the lessee's use of the leased aircraft or occupancy of the leased premises. In some cases, this indemnity extends to related liabilities arising from the negligence of the indemnified parties, but usually excludes any liabilities caused by their gross negligence or willful misconduct. Additionally, the lessee typically indemnifies such parties for any environmental liability that arises out of or relates to its use of the real estate leased premises. The Company believes that it is insured (subject to deductibles) for most tort liabilities and related indemnities described above with respect to the aircraft and real estate that it leases. The Company cannot estimate the potential amount of future payments, if any, under the foregoing indemnities and agreements. Credit Card Holdback Under the Company's bank-issued credit card processing agreements, certain proceeds from advance ticket sales may be held back to serve as collateral to cover any possible chargebacks or other disputed charges that may occur. These holdbacks, which are included in restricted cash in the Company's Consolidated Balance Sheets, totaled $1.0 million at December 31, 2017 . As of December 31, 2018 , there were no holdbacks held with the Company's credit card processors. In the event of a material adverse change in the business, the holdback could increase to an amount up to 100% of the applicable credit card air traffic liability, which would also cause an increase in the level of restricted cash. Labor Negotiations As of December 31, 2018 , approximately 84% of employees were represented by unions. Additionally, the collective bargaining agreement for the Association of Flight Attendants (AFA), which represents 29% of employees became amendable on January 1, 2017, the Company is currently in negotiations with the AFA. The Company can provide no assurance that a successful or timely resolution of these labor negotiations will be achieved.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information Supplemental disclosures of cash flow information and non-cash investing and financing activities were as follows: Year Ended December 31, 2018 2017 2016 (in thousands) Cash payments for interest (net of amounts capitalized) $ 24,343 $ 23,134 $ 29,751 Cash payments for income taxes 16,063 65,812 92,934 Investing and Financing Activities Not Affecting Cash: Property and equipment acquired through a capital or financing lease 119,530 72,996 * 6,092 Maintenance hangar project (see Note 9) — — 72,996 * * Amount was reclassified from an other liability as of December 31, 2016 to a financing (lease) liability when completed and placed into service as of December 31, 2017.

Condensed Consolidating Financi

Condensed Consolidating Financial Information	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Condensed Consolidating Financial Information	Condensed Consolidating Financial Information The following condensed consolidating financial information is presented in accordance with Regulation S-X paragraph 210.3-10 because, in connection with the issuance by two pass-through trusts formed by Hawaiian (which is also referred to in this Note 16 as Subsidiary Issuer / Guarantor) of pass-through certificates, as discussed in Note 8 , the Company (which is also referred to in this Note 16 as Parent Issuer / Guarantor), is fully and unconditionally guaranteeing the payment obligations of Hawaiian, which is a 100% owned subsidiary of the Company, under equipment notes to be issued by Hawaiian to purchase new aircraft. Condensed consolidating financial statements are presented in the following tables: Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) Year Ended December 31, 2018 Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) Operating Revenue $ — $ 2,827,215 $ 10,601 $ (405 ) $ 2,837,411 Operating Expenses: Aircraft fuel, including taxes and delivery — 599,544 — — 599,544 Wages and benefits — 684,719 — — 684,719 Aircraft rent — 125,883 78 — 125,961 Maintenance materials and repairs — 233,503 6,256 — 239,759 Aircraft and passenger servicing — 157,796 — — 157,796 Commissions and other selling (5 ) 129,332 128 (140 ) 129,315 Depreciation and amortization — 134,651 5,215 — 139,866 Other rentals and landing fees — 126,509 394 — 126,903 Purchased services 195 130,665 852 (61 ) 131,651 Contract terminations expense — 35,322 — — 35,322 Other 6,527 142,125 3,759 (204 ) 152,207 Total 6,717 2,500,049 16,682 (405 ) 2,523,043 Operating Income (Loss) (6,717 ) 327,166 (6,081 ) — 314,368 Nonoperating Income (Expense): Undistributed net income of subsidiaries 238,365 — — (238,365 ) — Other nonoperating special items — — — — — Interest expense and amortization of debt discounts and issuance costs (3 ) (32,861 ) (137 ) — (33,001 ) Interest income 185 9,057 — — 9,242 Capitalized interest — 7,887 — — 7,887 Other components of net periodic benefit cost — (825 ) — — (825 ) Gains on fuel derivatives — 5,590 — — 5,590 Other, net (4 ) (2,117 ) 18 — (2,103 ) Total 238,543 (13,269 ) (119 ) (238,365 ) (13,210 ) Income (Loss) Before Income Taxes 231,826 313,897 (6,200 ) (238,365 ) 301,158 Income tax expense (benefit) (1,374 ) 70,634 (1,302 ) — 67,958 Net Income (Loss) $ 233,200 $ 243,263 $ (4,898 ) $ (238,365 ) $ 233,200 Comprehensive Income (Loss) $ 227,834 $ 237,897 $ (4,898 ) $ (232,999 ) $ 227,834 Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) Year Ended December 31, 2017 (a) Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) Operating Revenue $ — $ 2,667,435 $ 8,102 $ (392 ) $ 2,675,145 Operating Expenses: Aircraft fuel, including taxes and delivery — 440,383 — — 440,383 Wages and benefits — 632,997 — — 632,997 Aircraft rent — 137,289 475 — 137,764 Maintenance materials and repairs — 215,473 4,080 — 219,553 Aircraft and passenger servicing — 144,853 — — 144,853 Commissions and other selling 84 126,674 129 (137 ) 126,750 Depreciation and amortization — 109,458 3,819 — 113,277 Other rentals and landing fees — 116,763 — — 116,763 Purchased services 478 109,436 933 (60 ) 110,787 Special items — 23,450 — — 23,450 Other 5,393 137,494 1,838 (195 ) 144,530 Total 5,955 2,194,270 11,274 (392 ) 2,211,107 Operating Income (Loss) (5,955 ) 473,165 (3,172 ) — 464,038 Nonoperating Income (Expense): Undistributed net income of subsidiaries 333,476 — — (333,476 ) — Other nonoperating special items — (45,585 ) — — (45,585 ) Interest expense and amortization of debt discounts and issuance costs — (30,901 ) — — (30,901 ) Interest income — 5,830 302 — 6,132 Capitalized interest — 8,437 — — 8,437 Other components of net periodic benefit cost — (16,713 ) — — (16,713 ) Gains on fuel derivatives — 3,312 — — 3,312 Other, net — 2,101 — — 2,101 Total 333,476 (73,519 ) 302 (333,476 ) (73,217 ) Income (Loss) Before Income Taxes 327,521 399,646 (2,870 ) (333,476 ) 390,821 Income tax expense (benefit) (3,089 ) 63,300 — — 60,211 Net Income (Loss) $ 330,610 $ 336,346 $ (2,870 ) $ (333,476 ) $ 330,610 Comprehensive Income (Loss) $ 358,841 $ 364,575 $ (2,870 ) $ (361,707 ) $ 358,839 (a) Amounts adjusted due to the adoption of ASC No. 606, Revenue from Contracts with Customers . See Note 1 to Consolidated Financial Statements for additional information. Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) Year Ended December 31, 2016 (a) Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) Operating Revenue $ — $ 2,426,479 $ 6,297 $ (363 ) $ 2,432,413 Operating Expenses: Aircraft fuel, including taxes and delivery — 344,322 — — 344,322 Wages and benefits — 535,264 — — 535,264 Aircraft rent — 124,521 44 — 124,565 Maintenance materials and repairs — 225,707 3,337 — 229,044 Aircraft and passenger servicing — 129,899 — — 129,899 Commissions and other selling 72 122,717 124 (126 ) 122,787 Depreciation and amortization — 104,689 3,439 — 108,128 Other rentals and landing fees — 108,087 — — 108,087 Purchased services 149 95,450 660 (60 ) 96,199 Special items — 109,142 — — 109,142 Other 5,300 121,104 1,262 (177 ) 127,489 Total 5,521 2,020,902 8,866 (363 ) 2,034,926 Operating Income (Loss) (5,521 ) 405,577 (2,569 ) — 397,487 Nonoperating Income (Expense): Undistributed net income of subsidiaries 226,561 — — (226,561 ) — Interest expense and amortization of debt discounts and issuance costs 117 (36,729 ) — — (36,612 ) Interest income 265 3,742 — — 4,007 Capitalized interest — 2,651 — — 2,651 Other components of net periodic benefit cost — (20,270 ) — — (20,270 ) Gains on fuel derivatives — 20,106 — — 20,106 Loss on extinguishment of debt — (10,473 ) — — (10,473 ) Other, net — 4,323 — — 4,323 Total 226,943 (36,650 ) — (226,561 ) (36,268 ) Income (Loss) Before Income Taxes 221,422 368,927 (2,569 ) (226,561 ) 361,219 Income tax expense (benefit) (2,698 ) 139,797 — — 137,099 Net Income (Loss) $ 224,120 $ 229,130 $ (2,569 ) $ (226,561 ) $ 224,120 Comprehensive Income (Loss) $ 219,903 $ 224,914 $ (2,569 ) $ (222,344 ) $ 219,904 (a) Amounts adjusted due to the adoption of ASC No. 606, Revenue from Contracts with Customers . See Note 1 to Consolidated Financial Statements for additional information. Condensed Consolidating Balance Sheets December 31, 2018 Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) ASSETS Current assets: Cash and cash equivalents $ 5,154 $ 255,279 $ 8,144 $ — $ 268,577 Restricted cash — — — — — Short-term investments — 232,241 — — 232,241 Accounts receivable, net — 109,499 2,569 (234 ) 111,834 Spare parts and supplies, net — 33,942 — — 33,942 Prepaid expenses and other 165 58,296 112 — 58,573 Total 5,319 689,257 10,825 (234 ) 705,167 Property and equipment at cost — 2,756,551 92,021 — 2,848,572 Less accumulated depreciation and amortization — (648,111 ) (15,350 ) — (663,461 ) Property and equipment, net — 2,108,440 76,671 — 2,185,111 Long-term prepayments and other 62,990 185,161 899 (63,494 ) 185,556 Deferred tax assets, net — — — — — Goodwill and other intangible assets, net — 120,119 693 — 120,812 Intercompany receivable — 456,338 — (456,338 ) — Investment in consolidated subsidiaries 1,325,380 — — (1,325,380 ) — TOTAL ASSETS $ 1,393,689 $ 3,559,315 $ 89,088 $ (1,845,446 ) $ 3,196,646 LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Accounts payable $ 665 $ 139,552 $ 3,163 $ (234 ) $ 143,146 Air traffic liability and current frequent flyer deferred revenue — 598,387 5,349 — 603,736 Other accrued liabilities — 157,842 312 — 158,154 Current maturities of long-term debt, less discount, and capital lease obligations — 101,052 45 — 101,097 Total 665 996,833 8,869 (234 ) 1,006,133 Long-term debt and capital lease obligations — 604,089 4,595 — 608,684 Intercompany payable 445,030 — 11,308 (456,338 ) — Other liabilities and deferred credits: Accumulated pension and other postretirement benefit obligations. — 182,620 — — 182,620 Other liabilities and deferred credits — 118,682 1,144 — 119,826 Noncurrent frequent flyer deferred revenue — 163,619 — — 163,619 Deferred tax liabilities, net — 167,770 — — 167,770 Total — 632,691 1,144 — 633,835 Shareholders' equity 947,994 1,325,702 63,172 (1,388,874 ) 947,994 TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY $ 1,393,689 $ 3,559,315 $ 89,088 $ (1,845,446 ) $ 3,196,646 Condensed Consolidating Balance Sheets December 31, 2017 (a) Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) ASSETS Current assets: Cash and cash equivalents $ 57,405 $ 125,861 $ 7,687 $ — $ 190,953 Restricted cash — 1,000 — — 1,000 Short-term investments — 269,297 — — 269,297 Accounts receivable, net 25 139,008 1,455 (209 ) 140,279 Spare parts and supplies, net — 35,361 — — 35,361 Prepaid expenses and other 171 78,933 82 — 79,186 Total 57,601 649,460 9,224 (209 ) 716,076 Property and equipment at cost — 2,326,249 74,562 — 2,400,811 Less accumulated depreciation and amortization — (546,831 ) (11,717 ) — (558,548 ) Property and equipment, net — 1,779,418 62,845 — 1,842,263 Long-term prepayments and other — 193,449 183 — 193,632 Deferred tax assets, net 31,845 — — (31,845 ) — Goodwill and other intangible assets, net — 120,695 1,155 — 121,850 Intercompany receivable — 392,791 — (392,791 ) — Investment in consolidated subsidiaries 1,137,941 — — (1,137,941 ) — TOTAL ASSETS $ 1,227,387 $ 3,135,813 $ 73,407 $ (1,562,786 ) $ 2,873,821 LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Accounts payable $ 622 $ 138,818 $ 1,574 $ (209 ) $ 140,805 Air traffic liability and current frequent flyer deferred revenue — 584,366 4,727 — 589,093 Other accrued liabilities 32 147,211 350 — 147,593 Current maturities of long-term debt, less discount, and capital lease obligations — 59,470 — — 59,470 Total 654 929,865 6,651 (209 ) 936,961 Long-term debt and capital lease obligations — 511,201 — — 511,201 Intercompany payable 381,608 — 11,183 (392,791 ) — Other liabilities and deferred credits: Accumulated pension and other postretirement benefit obligations. — 220,788 — — 220,788 Other liabilities and deferred credits — 74,736 1,105 75,841 Noncurrent frequent flyer deferred revenue — 149,764 — — 149,764 Deferred tax liabilities, net — 165,986 — (31,845 ) 134,141 Total — 611,274 1,105 (31,845 ) 580,534 Shareholders' equity 845,125 1,083,473 54,468 (1,137,941 ) 845,125 TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY $ 1,227,387 $ 3,135,813 $ 73,407 $ (1,562,786 ) $ 2,873,821 (a) Amounts adjusted due to the adoption of ASC No. 606, Revenue from Contracts with Customers . See Note 1 to Consolidated Financial Statements for additional information. Condensed Consolidating Statements of Cash Flows Year Ended December 31, 2018 Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) Net Cash Provided By (Used In) Operating Activities: $ (2,773 ) $ 509,405 $ 1,876 $ — $ 508,508 Cash Flows From Investing Activities: Net payments to affiliates (14,400 ) (91,515 ) — 105,915 — Additions to property and equipment, including pre-delivery deposits — (470,970 ) (15,807 ) — (486,777 ) Proceeds from purchase assignment and leaseback transactions — 87,000 — — 87,000 Proceeds from disposition of property and equipment — 46,714 — — 46,714 Purchases of investments — (210,836 ) — — (210,836 ) Sales of investments — 247,423 — — 247,423 Net cash used in investing activities (14,400 ) (392,184 ) (15,807 ) 105,915 (316,476 ) Cash Flows From Financing Activities: Long-term borrowings — 86,500 — — 86,500 Repayments of long-term debt and capital lease obligations — (68,233 ) (12 ) — (68,245 ) Dividend payments (24,171 ) — — — (24,171 ) Repurchases of common stock (102,500 ) — — — (102,500 ) Debt issuance costs — (3,350 ) — — (3,350 ) Net payments from affiliates 91,515 — 14,400 (105,915 ) — Other 78 (3,720 ) — (3,642 ) Net cash provided by (used in) financing activities (35,078 ) 11,197 14,388 (105,915 ) (115,408 ) Net increase (decrease) in cash and cash equivalents (52,251 ) 128,418 457 — 76,624 Cash, cash equivalents, and restricted cash—Beginning of Period 57,405 126,861 7,687 — 191,953 Cash, cash equivalents, and restricted cash—End of Period $ 5,154 $ 255,279 $ 8,144 $ — $ 268,577 Condensed Consolidating Statements of Cash Flows Year Ended December 31, 2017 Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) Net Cash Provided By (Used In) Operating Activities: $ (4,803 ) $ 334,433 $ 1,505 $ — $ 331,135 Cash Flows From Investing Activities: Net payments to affiliates (2,500 ) (103,254 ) — 105,754 — Additions to property and equipment, including pre-delivery deposits — (336,820 ) (4,695 ) — (341,515 ) Proceeds from purchase assignment and leaseback transactions — 33,000 — — 33,000 Proceeds from disposition of property and equipment — 941 — — 941 Purchases of investments — (231,393 ) — — (231,393 ) Sales of investments — 244,261 — — 244,261 Net cash used in investing activities (2,500 ) (393,265 ) (4,695 ) 105,754 (294,706 ) Cash Flows From Financing Activities: Repayments of long-term debt and capital lease obligations — (61,486 ) — — (61,486 ) Dividend payments (6,261 ) — — — (6,261 ) Repurchases of common stock (100,000 ) — — — (100,000 ) Debt issuance costs — (188 ) — — (188 ) Net payments from affiliates 103,254 — 2,500 (105,754 ) — Other 86 (7,618 ) — (7,532 ) Net cash provided by (used in) financing activities (2,921 ) (69,292 ) 2,500 (105,754 ) (175,467 ) Net decrease in cash and cash equivalents (10,224 ) (128,124 ) (690 ) — (139,038 ) Cash, cash equivalents, and restricted cash—Beginning of Period 67,629 254,985 8,377 — 330,991 Cash, cash equivalents, and restricted cash—End of Period $ 57,405 $ 126,861 $ 7,687 $ — $ 191,953 Condensed Consolidating Statements of Cash Flows Year Ended December 31, 2016 Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) Net Cash Provided By (Used In) Operating Activities: $ (4,954 ) $ 440,203 $ 1,795 $ — $ 437,044 Cash Flows From Investing Activities: Net payments to affiliates — (28,927 ) — 28,927 — Additions to property and equipment, including pre-delivery deposits — (165,710 ) (13,128 ) — (178,838 ) Proceeds from purchase assignment and leaseback transactions — 31,851 — — 31,851 Net proceeds from disposition of equipment — 15 1 — 16 Purchases of investments — (260,987 ) — — (260,987 ) Sales of investments — 253,855 — — 253,855 Net cash provided by (used in) investing activities — (169,903 ) (13,127 ) 28,927 (154,103 ) Cash Flows From Financing Activities: Repayments of long-term debt and capital lease obligations — (214,025 ) — — (214,025 ) Repurchases and conversion of convertible notes (1,426 ) — — — (1,426 ) Repurchases of common stock (13,763 ) — — — (13,763 ) Debt issuance costs — (1,653 ) — — (1,653 ) Net payments from affiliates 17,894 — 11,033 (28,927 ) — Other 458 (8,043 ) — — (7,585 ) Net cash provided by (used in) financing activities 3,163 (223,721 ) 11,033 (28,927 ) (238,452 ) Net increase (decrease) in cash and cash equivalents (1,791 ) 46,579 (299 ) — 44,489 Cash, cash equivalents, and restricted cash—Beginning of Period 69,420 208,406 8,676 — 286,502 Cash, cash equivalents, and restricted cash—End of Period $ 67,629 $ 254,985 $ 8,377 $ — $ 330,991 Income Taxes The income tax expense (benefit) is presented as if each entity that is part of the consolidated group files a separate return.

Supplemental Financial Informat

Supplemental Financial Information (unaudited)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Supplemental Financial Information (unaudited)	Supplemental Financial Information (unaudited) Unaudited Quarterly Financial Information: First Second Third Fourth (in thousands, except per share data) 2018: Operating revenue $ 665,412 $ 715,447 $ 759,087 $ 697,465 Operating income 36,265 92,928 115,826 69,349 Nonoperating income (loss) 830 12,859 931 (27,830 ) Net income 28,542 79,480 93,542 ** 31,636 ** Net Income Per Common Stock Share: Basic $ 0.56 $ 1.57 $ 1.85 $ 0.65 Diluted 0.56 1.56 1.84 0.64 2017: (a) Operating revenue $ 606,209 $ 670,116 $ 716,216 $ 682,604 Operating income 62,030 136,840 169,002 96,166 Nonoperating income (loss) (15,813 ) (13,191 ) (54,113 ) 9,899 * Net income 33,645 76,894 71,622 148,448 ** Net Income Per Common Stock Share: Basic $ 0.63 $ 1.43 $ 1.35 $ 2.86 Diluted 0.62 1.43 1.34 2.84 (a) Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers . See Note 1 to Consolidated Financial Statements for additional information. * During the fourth quarter of 2017, the Company recorded a $4.6 million reduction in its OPEB settlement related to the third quarter of 2017 revising the settlement from $15.0 million to $10.4 million . ** Amounts reflect the impact of the Tax Act enacted in 2017. See Note 10 for further discussion. The sum of the quarterly net income (loss) per common stock share amounts does not equal the annual amount reported since per share amounts are computed independently for each quarter and for the full year based on respective weighted-average common shares outstanding and other dilutive potential common shares. The Company's quarterly financial results are subject to seasonal fluctuations. Historically its second and third quarter financial results, which reflect periods of higher travel demand, are better than its first and fourth quarter financial results.

Schedule II-Valuation and Quali

Schedule II-Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II-Valuation and Qualifying Accounts	Schedule II—Hawaiian Holdings, Inc. Valuation and Qualifying Accounts Years Ended December 31, 2018 , 2017 and 2016 COLUMN A COLUMN B COLUMN C COLUMN D COLUMN E Description Balance at Beginning of Year (1) (2) Deductions Balance at End of Year (in thousands) Allowance for Doubtful Accounts 2018 $ 12 1,527 — (1,485 ) (a) $ 54 2017 $ 34 1,810 — (1,832 ) (a) $ 12 2016 $ 166 2,896 — (3,028 ) (a) $ 34 Allowance for Obsolescence of Flight Equipment Expendable Parts and Supplies 2018 $ 21,446 5,463 (b) — (4,321 ) (c) $ 22,588 2017 $ 17,358 6,276 (b) — (2,188 ) (c) $ 21,446 2016 $ 16,454 3,301 (b) — (2,397 ) (c) $ 17,358 Valuation Allowance on Deferred Tax Assets 2018 $ 2,547 — — — $ 2,547 2017 $ 1,992 555 — — $ 2,547 2016 $ 3,912 — — (1,920 ) (d) $ 1,992 _______________________________________________________________________________ (a) Doubtful accounts written off, net of recoveries. (b) Obsolescence reserve for Hawaiian flight equipment expendable parts and supplies. (c) Spare parts and supplies written off against the allowance for obsolescence. (d) Re-classified to uncertain tax position.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Hawaiian Holdings, Inc. (the Company, Holdings, we, us and our) and its direct wholly-owned subsidiary, Hawaiian Airlines, Inc. (Hawaiian), are incorporated in the State of Delaware. The Company's primary asset is its sole ownership of all issued and outstanding shares of common stock of Hawaiian. The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, including its principal subsidiary, Hawaiian, through which the Company conducts substantially all of its operations. All significant inter-company balances and transactions have been eliminated upon consolidation.
Reclassifications	The Company reclassified certain prior period amounts to conform to the current period presentation. Unless otherwise noted, all amounts disclosed are stated before consideration of income taxes.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ materially from those estimates.
Cash Equivalents	Cash Equivalents Cash equivalents consist of short-term, highly liquid investments with an original maturity of three months or less at the date of purchase.
Restricted Cash	Restricted Cash Restricted cash consists of cash held as collateral by institutions that process our credit card transactions for advanced ticket sales.
Short Term Investments	Short Term Investments Investments with original maturities of greater than three months and remaining maturities of less than one year are classified as short-term investments. Investments with maturities beyond one year may be classified as short-term based on their highly liquid nature and because such marketable securities represent the investment of cash that is available for current operations. All short-term investments, which consists of debt securities, are classified as available-for-sale, and realized gains and losses are recorded using the specific identification method. Changes in market value, excluding other-than-temporary impairments, are reflected in accumulated other comprehensive income (loss).
Spare Parts and Supplies	Spare Parts and Supplies Spare parts and supplies are valued at average cost, and primarily consist of expendable parts for flight equipment and other supplies. An allowance for obsolescence of expendable parts is provided over the estimated useful lives of the related aircraft and engines for spare parts expected to be on hand at the date the aircraft are retired from service. These allowances are based on management's estimates and are subject to change.
Property, Equipment and Depreciation	Property, Equipment and Depreciation Property and equipment are stated at cost and depreciated on a straight-line basis to their estimated residual values over the asset's estimated useful life. Depreciation begins when the asset is placed into service. Aircraft and related parts begin depreciating on the aircraft's first revenue flight. Estimated useful lives and residual values of property and equipment are as follows: Boeing 717-200 aircraft and engines 7 - 11 years, 7 - 34% residual value Boeing 767-300 aircraft and engines (1) Through retirement in 2019 Airbus A330-200 aircraft and engines 25 years, 10% residual value Airbus A321neo aircraft and engines 25 years, 10% residual value ATR turboprop aircraft and engines 10 years, 15% residual value Flight and ground equipment under capital lease Shorter of lease term or useful life Major rotable parts Average lease term or useful life for related aircraft, 10% - 15% residual value Improvements to leased flight equipment and the cargo maintenance hangar Shorter of lease term or useful life Facility leasehold improvements Shorter of lease term, including assumed lease renewals when renewal is economically compelled at key airports, or useful life Furniture, fixtures and other equipment 3 - 7 years, no residual value Capitalized software 3 - 7 years, no residual value (1) The Company will retire its Boeing 767-300 aircraft and flight equipment in the first quarter of 2019. Additions and modifications that significantly enhance the operating performance and/or extend the useful lives of property and equipment are capitalized and depreciated over the lesser of the remaining useful life of the asset or the remaining lease term, as applicable. Expenditures that do not improve or extend asset lives are charged to expense as incurred. Pre-delivery deposits are capitalized when paid. Aircraft under capital leases are recorded at an amount equal to the present value of minimum lease payments utilizing the Company's incremental borrowing rate at lease inception and amortized on a straight-line basis over the lesser of the remaining useful life of the aircraft or the lease term. The amortization is recorded in depreciation and amortization expense on the Consolidated Statement of Operations. Accumulated amortization of aircraft and other capital leases was $90.5 million and $70.9 million as of December 31, 2018 and 2017 , respectively. The Company capitalizes certain costs related to the acquisition and development of computer software and amortizes these costs using the straight-line method over the estimated useful life of the software.
Aircraft Maintenance and Repair Costs	Aircraft Maintenance and Repair Costs Maintenance and repair costs for owned and leased flight equipment, including the overhaul of aircraft components, are charged to operating expenses as incurred. Engine overhaul costs covered by power-by-the-hour arrangements are paid and expensed as incurred or expensed on a straight-line basis and are based on the amount of hours flown per contract. Under the terms of these power-by-the-hour agreements, the Company pays a set dollar amount per engine hour flown on a monthly basis and the third-party vendor assumes the obligation to repair the engines at no additional cost, subject to certain specified exclusions. As of December 31, 2018 and 2017, the Company had approximately $95.0 million and $109.3 million , respectively in prepayments to one of its power-by-the-hour vendors, which is recoverable over the next four years . Additionally, although the Company's aircraft lease agreements specifically provide that it is responsible for maintenance of the leased aircraft, the Company pays maintenance reserves to the aircraft lessors that are applied toward the cost of future maintenance events. These reserves are calculated based on a performance measure, such as flight hours, and are available for reimbursement to the Company upon the completion of the maintenance of the leased aircraft. However, reimbursements are limited to the available reserves associated with the specific maintenance activity for which the Company requests reimbursement. Under certain aircraft lease agreements, the lessor is entitled to retain excess amounts on deposit at the expiration of the lease, if any; whereas at the expiration of certain other existing aircraft lease agreements any such excess amounts are returned to the Company, provided that it has fulfilled all of its obligations under the lease agreements. The maintenance reserves paid under the lease agreements do not transfer either the obligation to maintain the aircraft or the cost risk associated with the maintenance activities to the aircraft lessor. In addition, the Company maintains the right to select any third-party maintenance provider. Maintenance reserve payments that are expected to be recovered from lessors are recorded as deposits in the Consolidated Balance Sheets as an asset until it is less than probable that any portion of the deposit is recoverable. In addition, payments of maintenance reserves that are not substantially and contractually related to the maintenance of the leased assets are expensed as incurred. Any costs that are substantially and contractually unrelated to the maintenance of the leased asset are considered to be unrecoverable. In order to properly account for the costs that are related to the maintenance of the leased asset, the Company bifurcates its maintenance reserves into two groups and expenses the proportionate share that is expected to be unrecoverable.
Goodwill and Indefinite-lived Intangible Assets	Goodwill and Indefinite-lived Intangible Assets Goodwill and intangible assets with indefinite lives are not amortized. We apply a fair value-based impairment test to the carrying value of goodwill and indefinite-lived intangible assets on an annual basis and, if certain events or circumstances indicate that an impairment loss may have been incurred, on an interim basis. We assess the value of our goodwill and indefinite-lived assets under either a qualitative or quantitative approach. Goodwill. When the Company evaluates goodwill for impairment using a quantitative approach, it estimates the fair value of the reporting unit by considering the market capitalization. If the reporting unit's fair value exceeds its carrying value, no further testing is required. If, however, the reporting unit's carrying value exceeds its fair value, the Company then determines the amount of the impairment charge, if any. The Company recognizes an impairment charge if the carrying value of the reporting unit's goodwill exceeds its estimated fair value. Intangible Assets. The Company assesses its indefinite-lived assets under a qualitative approach. The Company analyzes market factors to determine if events and circumstances have affected the fair value of the indefinite-lived intangible assets. If the Company determines that it is more likely than not that the asset value may be impaired, it then uses the quantitative approach to assess the asset's fair value and the amount of the impairment. The Company performs the quantitative impairment test for indefinite-lived intangible assets by comparing the asset's fair value to its carrying value.
Impairment of Long-Lived Assets and Finite-lived Intangible Assets	Impairment of Long-Lived Assets and Finite-lived Intangible Assets Long-lived assets used in operations, consisting principally of property and equipment and finite-lived intangible assets, are tested for impairment when events or changes in circumstances indicate, in management's judgment, that the assets might be impaired and the undiscounted cash flows estimated to be generated by those assets are less than their carrying amount. When testing for impairment management considers market trends, the expected useful lives of the assets, changes in economic conditions, recent transactions involving sales of similar assets and, if necessary, estimates of future undiscounted cash flows. To determine whether impairment exists for aircraft used in operations, assets are grouped at the fleet-type level (the lowest level for which there are identifiable cash flows) and future cash flows are estimated based on projections of capacity, passenger mile yield, fuel costs, labor costs and other relevant factors. If, at any time, management determines the net carrying value of an asset is not recoverable, the amount is reduced to its fair value during the period in which such determination is made. Any changes in the estimated useful lives of these assets will be accounted for prospectively.
Operating Leases	Operating Leases The Company leases aircraft, engines, airport terminal facilities, office space, and other equipment under operating leases. Some of these lease agreements include escalation clauses and renewal options. For scheduled rent escalation clauses during the lease terms or for rental payments commencing at a date other than the date of initial occupancy, the Company records minimum rental expenses on a straight-line basis over the terms of the leases in the Consolidated Statements of Operations.
Leased Aircraft Return Costs	Leased Aircraft Return Costs Costs associated with the return of leased aircraft are accrued when it is probable that a payment will be made and that amount is reasonably estimable, usually no sooner than after the last scheduled maintenance event prior to lease return. Any accrual is based on the time remaining on the lease, planned aircraft usage, and the provisions included in the lease agreement, although the actual amount due to any lessor upon return will not be known with certainty until lease termination. As leased aircraft are returned, any payments are charged against the established accrual. The accrual is part of current and long-term liabilities and was not material as of December 31, 2018 and 2017. The expense is included in Aircraft rent in the consolidated statements of operations.
Revenue Recognition and Costs to Obtain or Fulfill a Contract	Costs to obtain or fulfill a contract In order for the Company to provide transportation to its customers, the Company incurs fulfillment costs (booking fees, credit card fees, and commission/selling costs), which are deferred until the period in which the flight occurs. As of December 31, 2018 and 2017 , the Company's asset balance associated with these costs were $16.3 million and $16.7 million , respectively. During the twelve months ended December 31, 2018 , 2017 , and 2016 , expenses related to these costs totaled to $96.0 million , $95.5 million , and $94.3 million , respectively. To determine the amount to capitalize and expense at the end of each period, the Company uses historical sales data and estimates the amount associated with unflown tickets. Revenue Recognition Passenger revenue. The majority of the Company's revenue is derived from transporting passengers on our aircraft. The Company accounts for revenue in accordance with ASC 606, which was adopted on January 1, 2018, using the full retrospective method. See Recently Adopted Accounting Pronouncements section below for further discussion of adoption, including the impact on our previously issued financial statements. The Company's primary operations are that of its wholly-owned subsidiary, Hawaiian. Principally all operations of Hawaiian either originate and/or end in the State of Hawai'i. The management of such operations is based on a system-wide approach due to the interdependence of Hawaiian's route structure in its various markets. As Hawaiian offers only one significant line of business (i.e., air transportation), management has concluded that it has only one segment. The Company's operating revenues by geographic region (as defined by the Department of Transportation, DOT) are summarized below: Year Ended December 31, 2018 2017 2016 (in thousands) Domestic $ 2,071,861 $ 1,976,971 $ 1,874,039 Pacific 765,550 698,174 558,374 Total operating revenue $ 2,837,411 $ 2,675,145 $ 2,432,413 Hawaiian attributes operating revenue by geographic region based on the destination of each flight segment. Hawaiian's tangible assets consist primarily of flight equipment, which are mobile across geographic markets, and, therefore, have not been allocated to specific geographic regions. Passenger & Other revenue - Generally, the Company’s contracts with customers have two principal performance obligations, which are the promise to provide transportation to the passenger and the frequent flyer miles earned on the flight. In addition, the Company often charges additional fees for items such as baggage and in-flight entertainment. Such items are not capable of being distinct from the transportation provided because the customer can only benefit from the services during the flight. The transportation performance obligation, including the redemption of HawaiianMiles awards for flights, is satisfied, and revenue is recognized, as transportation is provided. In some instances, tickets sold by the Company can include a flight segment on another carrier which is referred to as an interline segment. In this situation, the Company acts as an agent for the other carrier and revenue is recognized net of cost in other revenue. Tickets sold by other airlines where the Company provides the transportation are recognized as passenger revenue at the estimated value to be billed to the other airline when travel is provided. Differences between amounts billed and the actual amounts may be rejected and rebilled or written off if the amount recorded was different from the original estimate. Other operating revenue consists of cargo revenue, ground handling fees, commissions, and fees earned under certain joint marketing agreements with other companies. These amounts are recognized when the service is provided. Year Ended December 31, 2018 2017 2016 Passenger Revenue by Type (in thousands) Passenger revenue, excluding frequent flyer $ 2,454,811 $ 2,351,062 $ 2,146,258 Frequent flyer revenue, transportation component 147,982 135,765 125,429 Passenger Revenue $ 2,602,793 $ 2,486,827 $ 2,271,687 Other revenue (e.g. cargo and other miscellaneous) $ 163,140 $ 142,172 $ 115,379 Frequent flyer revenue, marketing and brand component 71,478 46,146 45,347 Other Revenue $ 234,618 $ 188,318 $ 160,726 For the twelve months ended December 31, 2018 , 2017 , and 2016 , the Company's total revenue was $2.8 billion , $2.7 billion , and $2.4 billion , respectively. As of December 31, 2018 and 2017 , the Company's Air traffic liability balance as it relates to passenger tickets (excluding frequent flyer) was $427.8 million and $421.6 million , respectively, which represents future revenue that is expected to be realized over the next 12 months . During the twelve months ended December 31, 2018 , 2017 , and 2016 , the amount of revenue recognized that was included in Air traffic liability as of the beginning of the respective period was $421.0 million , $363.9 million , and $328.7 million , respectively. Passenger revenue associated with unused tickets, which represent unexercised passenger rights, is recognized in proportion to the pattern of rights exercised by related passengers (e.g. scheduled departure dates). To calculate the portion to be recognized as revenue in the period, the Company utilizes historical information and applies the trend rate to the current air traffic liability balances for that specific period. Certain governmental taxes are imposed on the Company's ticket sales through a fee included in ticket prices. The Company collects these fees and remits them to the appropriate government agency. Management has elected (via a practical expedient election) to exclude from the measurement of the transaction price all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected from a customer, e.g., sales, use, value added, and certain excise taxes. These fees have been presented on a net basis in the accompanying Consolidated Statements of Operations and recorded as a liability until remitted.
Frequent Flyer Program	Frequent Flyer Revenue. Hawaiian's frequent flyer travel award program provides a variety of awards to program members based on accumulated mileage. ASC 606 requires the Company to account for miles earned by passengers in the HawaiianMiles program through flight activity as a component of the passenger revenue ticket transaction at the estimated selling price of the miles. Ticket consideration received is allocated between the performance obligations, primarily travel and miles earned by passengers. The allocated value of the miles is deferred until the free travel or other award is used by the passenger, at which time it is included in passenger revenue. The value of the ticket used in the determination of the estimated selling price is based on the historical value of equivalent flights to those provided for loyalty awards and the related miles redeemed to obtain that award adjusted for breakage or fulfillment. The equivalent ticket value (ETV) includes a fulfillment discount (breakage) to reflect the value of the award ticket over the number of miles that, based on historical experience, will be needed to obtain the award. On a quarterly basis, the Company calculates the ETV by analyzing the fares of similar tickets for the prior 12 months, considering cabin class and geographic region. The Company also sells mileage credits to companies participating in our frequent flyer program These contracts generally include multiple performance obligations, including the transportation that will ultimately be provided when the mileage credits are redeemed and marketing and brand related activities. The marketing and brand performance obligations are effectively provided each time a HawaiianMiles member uses the co-branded credit card and monthly access to customer lists and marketing is provided, which corresponds to the timing of when the Company issues or is obligated to issue the mileage credits to the HawaiianMiles member. Therefore, the Company recognizes revenue for the marketing and brand performance obligations when HawaiianMiles members use their co-brand credit card and the resulting mileage credits are issued to them, which best correlates with the Company’s performance in satisfying the obligation. During the first quarter of 2018, the Company amended its partnership with Barclaycard US, Hawaiian's co-branded credit card partner. Management determined that the amendment should be accounted for as a termination of the existing contract and the creation of a new contract under ASC 606 and the relative selling price was determined for each performance obligation of the new agreement. The new agreement continues through 2024 and includes improved economics and enhanced product offerings for our Barclay's co-branded cardholders. The amended agreement did not change, and includes the following performance obligations; (i) transportation that will ultimately be provided when mileage credits are redeemed (transportation), (ii) the Hawaiian Airlines brand and access to its members lists (collectively, brand performance), (iii) marketing, and (iv) airline benefits to cardholders, including discounts and anniversary travel benefits, baggage waivers and inflight purchase credits. The Company determined the relative fair value of each performance obligation by estimating the selling prices of the deliverables by considering discounted cash flows using multiple inputs and assumptions, including: (1) the expected number of miles to be awarded and redeemed; (2) the estimated weighted average equivalent ticket value, adjusted by a fulfillment discount; (3) the estimated total annual cardholder spend; (4) an estimated royalty rate for the Hawaiian portfolio; and (5) the expected use of each of the airline benefits. The overall consideration received is allocated to the performance obligations based on their relative selling prices. The transportation performance obligation is deferred and recognized as passenger revenue when the transportation is expected to be provided. Accounting for mileage sales to co-branded partners involves the use of various techniques to estimate revenue. To determine the total estimated transaction price, the Company forecasts future credit card activity using historical information. The relative selling price is determined using management’s standalone estimated selling price of each performance obligation. The objective of using the estimated selling price based methodology is to determine the price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. Accordingly, the Company determines the best estimate of selling price by considering multiple inputs and methods including, but not limited to, discounted cash flows, brand value, published selling prices, number of miles awarded and number of miles redeemed. The Company estimates the selling price of miles using an ETV adjusted for a fulfillment discount as described above. The Company's frequent flyer liability is recorded in Air traffic liability (short-term) and Noncurrent frequent flyer deferred revenue in the Company's consolidated balance sheet based on estimated and expected redemption patterns using historical data and analysis. As of December 31, 2018 and 2017 , the balances were as follows: As of December 31, 2018 2017 (in thousands) Air traffic liability (current portion of frequent flyer deferred revenue) $ 168,570 $ 161,757 Noncurrent frequent flyer deferred revenue 163,619 149,764 Total frequent flyer liability $ 332,189 $ 311,521 Miles expire after 18 months of member account inactivity. The Company reviews its breakage estimates annually based upon the latest available information regarding redemption and expiration patterns (e.g., credit card and non-credit card holders). The Company’s estimate of the expected expiration of miles requires significant management judgment. Current and future changes to expiration assumptions or to the expiration policy, or to program rules and program could affect the estimated value of a mile.
Accounts Receivable	Accounts Receivable Accounts receivable primarily consist of amounts due from credit card companies, non-airline partners, and cargo transportation customers. The Company provides an allowance for uncollectible accounts equal to the estimated losses expected to be incurred based on historical chargebacks, write-offs, bankruptcies and other specific analyses. Bad debt expense was not material in any period presented.
Pension and Postretirement and Postemployment Benefits	Pension and Postretirement and Postemployment Benefits The Company accounts for its defined benefit pension and other postretirement and postemployment plans in accordance with ASC 715, Compensation—Retirement Benefits (ASC 715), which requires companies to measure their plans' assets and obligations to determine the funded status at fiscal year-end, reflect the funded status in the statement of financial position as an asset or liability, and recognize changes in the funded status of the plans in comprehensive income during the year in which the changes occur. Pension and other postretirement and postemployment benefit expenses are recognized on an accrual basis over each employee's service periods. Pension expense is generally independent of funding decisions or requirements. The Company uses the corridor approach in the valuation of its defined benefit pension and other postretirement and postemployment plans. The corridor approach defers all actuarial gains and losses resulting from variances between actual results and actuarial assumptions. These unrecognized actuarial gains and losses are amortized when the net gains and losses exceed 10% of the greater of the market-related value of plan assets or the projected benefit obligation at the beginning of the year. The amount in excess of the corridor is amortized over the expected average remaining service period of active plan participants for the open plans and is amortized over the expected average remaining lifetime of inactive participants for plans whose population is “all or almost all” inactive.
Advertising Costs	Advertising Costs Advertising costs are expensed when incurred.
Capitalized Interest	Capitalized Interest Interest is capitalized upon the payment of predelivery deposits for aircraft and engines, and is depreciated over the estimated useful life of the asset from service inception date.
Share-Based Compensation	Share-Based Compensation The Company measures the cost of employee services received in exchange for an award of equity instruments based on the grant date fair value of the award. The fair value of the awards are estimated using the following: (1) option-pricing models for grants of stock options or (2) fair value at the measurement date (usually the grant date) for awards of stock subject to service and / or performance-based vesting. The resulting cost is recognized as compensation expense over the period of time during which an employee is required to provide services to the Company (the service period) in exchange for the award, the service period generally being the vesting period of the award. The Company's policy is to recognize forfeitures as they occur.
Financial Derivative Instruments	Financial Derivative Instruments The Company uses derivatives to manage risks associated with certain assets and liabilities arising from the potential adverse impact of fluctuations in global aircraft fuel prices, interest rates and foreign currency exchange rates. The following table summarizes the accounting treatment of the Company's derivative contracts: Classification of Unrealized Gains (Losses) Derivative Type Accounting Designation Classification of Realized Gains and Losses Effective Portion Ineffective Portion Interest rate contracts Designated as cash flow hedges Interest expense and amortization of debt discounts and issuance costs AOCI Nonoperating income (expense) Foreign currency exchange contracts Designated as cash flow hedges Passenger revenue AOCI Nonoperating income (expense) Fuel hedge contracts Not designated as hedges Gains (losses) on fuel derivatives Change in fair value is recorded in nonoperating income (expense) Foreign currency exchange contracts Not designated as hedges Nonoperating income (expense), Other Change in fair value is recorded in nonoperating income (expense) If the Company terminates a derivative designated for hedge accounting under ASC 815, prior to its contractual settlement date, then the cumulative gain or loss recognized in AOCI at the termination date remains in AOCI until the forecasted transaction occurs. In a situation where it becomes probable that a hedged forecasted transaction will not occur, any gains and/or losses that have been recorded to AOCI would be required to be immediately reclassified into earnings. All cash flows associated with purchasing and settling derivatives are classified as operating cash flows in the Consolidated Statements of Cash Flows.
Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements In February 2018, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220) Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The standard focuses on a targeted improvement to reclassify stranded tax effects resulting from the Tax Cuts and Jobs Act (the Tax Act) enacted on December 22, 2017 from accumulated other comprehensive income to retained earnings. The Company elected to early adopt the standard in the year ended December 31, 2018 and reclassified tax benefit of $12.5 million from accumulated other comprehensive income to accumulated income in the Consolidated Balance Sheets. In May 2014, the Financial Accounting Standards Board (FASB) issued ASC 606, 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. ASC 606 replaced most existing revenue recognition guidance in GAAP and is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. The Company adopted the standard as of January 1, 2018, utilizing the full retrospective transition method, which required the Company to restate prior reporting periods presented. The most significant impact of the standard relates to the accounting for the Company's frequent flyer travel award program. This change, as well as other less significant changes, are described below: • Frequent flyer - The standard requires the Company to account for miles earned by passengers in the HawaiianMiles program through flight activity as a component of the passenger revenue ticket transaction at the estimated selling price of the miles, effectively eliminating the incremental cost accounting previously applied. The allocated value of miles earned through flights and sold to partners is recognized at the time the free travel or other award is redeemed by the passenger. Previously, the transportation element associated with sold miles was deferred and recognized as passenger revenue over the period when the transportation was expected to be provided ( 23 months). • Passenger revenue - Prior to the adoption of ASC 606, the Company recorded revenue for unused tickets when the tickets expired. Ticket change fees were previously recognized at the time the fees were assessed. Further, the Company reclassified revenue items such as checked baggage, charter, ticket change and cancellation fees, in flight revenue, and other incidental sales to passenger revenue (from other operating revenue), as these items do not represent distinct performance obligations separate from the transportation provided to the passenger. • Selling Costs - Prior to ASC 606, the Company recognized the costs associated with credit card and booking fees as they were incurred. Adoption of the revenue recognition standard impacted our previously reported results as follows: Year Ended December 31, 2016 As Previously Reported Adjustments As Restated (in thousands) Operating Revenue: Passenger $ 2,145,742 $ 125,945 $ 2,271,687 Other 304,838 (144,112 ) 160,726 Total $ 2,450,580 $ (18,167 ) $ 2,432,413 Operating Expenses 2,034,848 78 2,034,926 Operating Income 415,732 (18,245 ) 397,487 Nonoperating Income (Expense) (36,268 ) — (36,268 ) Income tax expense 144,032 (6,933 ) 137,099 Net Income $ 235,432 $ (11,312 ) $ 224,120 Net Income Per Common Stock Share: Basic $ 4.40 $ (0.21 ) $ 4.19 Diluted $ 4.36 $ (0.21 ) $ 4.15 Year Ended December 31, 2017 As Previously Reported Adjustments As Restated (in thousands) Operating Revenue: Passenger $ 2,362,076 $ 124,751 $ 2,486,827 Other 333,552 (145,234 ) 188,318 Total $ 2,695,628 $ (20,483 ) $ 2,675,145 Operating Expenses 2,211,856 (749 ) 2,211,107 Operating Income 483,772 (19,734 ) 464,038 Nonoperating Income (Expense) (73,217 ) — (73,217 ) Income tax expense 46,514 13,697 60,211 Net Income $ 364,041 $ (33,431 ) $ 330,610 Net Income Per Common Stock Share: Basic $ 6.86 $ (0.63 ) $ 6.23 Diluted $ 6.82 $ (0.63 ) $ 6.19 December 31, 2017 As Previously Reported Adjustments As Restated (in thousands) ASSETS Prepaid expenses and other $ 65,196 $ 13,990 $ 79,186 LIABILITIES AND SHAREHOLDERS' EQUITY Current Liabilities: Air traffic liability 545,362 43,731 589,093 Other accrued liabilities 146,283 1,310 147,593 Noncurrent Liabilities: Other liabilities and deferred credits 95,636 (19,795 ) 75,841 Noncurrent frequent flyer deferred revenue — 149,764 149,764 Deferred tax liability 174,344 (40,203 ) 134,141 Shareholders' Equity: Accumulated income 913,951 (120,817 ) 793,134 Recently Issued Accounting Pronouncements In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging , which better aligns a company's risk management activities and financial reporting for hedging relationships and is intended to simplify the hedge accounting requirements. ASU 2017-12 is effective for annual reporting periods beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the components and options within ASU 2017-12. The adoption of this standard is not expected to have an impact on the Company's consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (codified within ASC 842, Leases ). ASC 842 requires a lessee to recognize a right-of-use asset and a lease liability in the statement of financial position for all leases (with the exception of short-term leases) at the lease commencement date and recognize expenses similar to the current ASC 840, Leases. ASC 842 is effective for fiscal years, and interim periods beginning after December 15, 2018, and early adoption is permitted. The Company currently plans to utilize the optional transition method for adoption of ASC 842, which allows entities to continue to apply the legacy guidance in Topic 840, including its disclosure requirements, in the comparative periods presented in the year of adoption. The Company plans to adopt ASU 2016-02 on January 1, 2019, as required. Under ASU 2016-02, the lease liability will be measured at the present value of remaining lease payments and the right-of-use (ROU) asset will be derived from the calculation of the lease liability, adjusted for any historically recorded amounts under Topic 840 for rent leveling and certain other adjustments (ROU Asset). Lease payments, which are comparable to the minimum lease payments included in the Company's existing lease commitments disclosure, include fixed and in-substance fixed payments, variable payments based on an index or rate, reasonably certain purchase options, termination penalties and probable amounts the lessee will owe under a residual value guarantee. Lease payments exclude variable payments other than those based on an index or rate or any amount allocated to non-lease components (unless the practical expedient is elected on an asset class level to combine components). Variable lease payments will continue to be expensed as incurred. The Company completed its preliminary evaluation of implementing ASU 2016-02 and believes that the most significant impact on its financial statements will be the consolidated balance sheet impact of recording the ROU Asset and Operating Lease Liability for existing aircraft and engine leases, its Maintenance Hangar lease with the State of Hawaii, and certain real estate leases. As of December 31, 2018, the Company had 17 aircraft and 5 engines under operating lease in its fleet. The net present value of future lease payments for the aforementioned leases range between $550 million and $650 million . The Company also has operating leases related to terminal operations and office space, which are not included in the range provided, because the majority of these leases have variable payments and are not expected to be included in the Operating Lease Liability at adoption. Management does not believe that the impact of adopting ASC 842 will be significant to the consolidated statement of operations and consolidated statements of cash flows. ASC 842 also eliminates the current build-to-suit lease accounting guidance and is expected to result in derecognition of build-to-suit assets and liabilities that remained on the balance sheet after the end of the construction period and then the application of lease accounting to the agreement. See Note 9 for additional discussion on the Company's build-to-suit project. Management concluded that the lease will be accounted for as an operating lease under ASC 842, which will result in operating lease expense being recognized equally over the lease term, which is a change from the current treatment as a financing, similar to capital lease treatment. The present value of the Operating Lease Liability, including the amount previously recognized as a financing liability of $73.0 million , is included in the range discussed above.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Schedule of estimated useful lives and residual values of property and equipment	Estimated useful lives and residual values of property and equipment are as follows: Boeing 717-200 aircraft and engines 7 - 11 years, 7 - 34% residual value Boeing 767-300 aircraft and engines (1) Through retirement in 2019 Airbus A330-200 aircraft and engines 25 years, 10% residual value Airbus A321neo aircraft and engines 25 years, 10% residual value ATR turboprop aircraft and engines 10 years, 15% residual value Flight and ground equipment under capital lease Shorter of lease term or useful life Major rotable parts Average lease term or useful life for related aircraft, 10% - 15% residual value Improvements to leased flight equipment and the cargo maintenance hangar Shorter of lease term or useful life Facility leasehold improvements Shorter of lease term, including assumed lease renewals when renewal is economically compelled at key airports, or useful life Furniture, fixtures and other equipment 3 - 7 years, no residual value Capitalized software 3 - 7 years, no residual value (1) The Company will retire its Boeing 767-300 aircraft and flight equipment in the first quarter of 2019.
Disaggregation of revenue	These amounts are recognized when the service is provided. Year Ended December 31, 2018 2017 2016 Passenger Revenue by Type (in thousands) Passenger revenue, excluding frequent flyer $ 2,454,811 $ 2,351,062 $ 2,146,258 Frequent flyer revenue, transportation component 147,982 135,765 125,429 Passenger Revenue $ 2,602,793 $ 2,486,827 $ 2,271,687 Other revenue (e.g. cargo and other miscellaneous) $ 163,140 $ 142,172 $ 115,379 Frequent flyer revenue, marketing and brand component 71,478 46,146 45,347 Other Revenue $ 234,618 $ 188,318 $ 160,726 The Company's operating revenues by geographic region (as defined by the Department of Transportation, DOT) are summarized below: Year Ended December 31, 2018 2017 2016 (in thousands) Domestic $ 2,071,861 $ 1,976,971 $ 1,874,039 Pacific 765,550 698,174 558,374 Total operating revenue $ 2,837,411 $ 2,675,145 $ 2,432,413
Schedule of frequent flyer liability for future award redemptions	As of December 31, 2018 and 2017 , the balances were as follows: As of December 31, 2018 2017 (in thousands) Air traffic liability (current portion of frequent flyer deferred revenue) $ 168,570 $ 161,757 Noncurrent frequent flyer deferred revenue 163,619 149,764 Total frequent flyer liability $ 332,189 $ 311,521
Summary of accounting treatment of derivative contracts	The following table summarizes the accounting treatment of the Company's derivative contracts: Classification of Unrealized Gains (Losses) Derivative Type Accounting Designation Classification of Realized Gains and Losses Effective Portion Ineffective Portion Interest rate contracts Designated as cash flow hedges Interest expense and amortization of debt discounts and issuance costs AOCI Nonoperating income (expense) Foreign currency exchange contracts Designated as cash flow hedges Passenger revenue AOCI Nonoperating income (expense) Fuel hedge contracts Not designated as hedges Gains (losses) on fuel derivatives Change in fair value is recorded in nonoperating income (expense) Foreign currency exchange contracts Not designated as hedges Nonoperating income (expense), Other Change in fair value is recorded in nonoperating income (expense)
Schedule of recast unaudited financial information reflecting ASC 606	Adoption of the revenue recognition standard impacted our previously reported results as follows: Year Ended December 31, 2016 As Previously Reported Adjustments As Restated (in thousands) Operating Revenue: Passenger $ 2,145,742 $ 125,945 $ 2,271,687 Other 304,838 (144,112 ) 160,726 Total $ 2,450,580 $ (18,167 ) $ 2,432,413 Operating Expenses 2,034,848 78 2,034,926 Operating Income 415,732 (18,245 ) 397,487 Nonoperating Income (Expense) (36,268 ) — (36,268 ) Income tax expense 144,032 (6,933 ) 137,099 Net Income $ 235,432 $ (11,312 ) $ 224,120 Net Income Per Common Stock Share: Basic $ 4.40 $ (0.21 ) $ 4.19 Diluted $ 4.36 $ (0.21 ) $ 4.15 Year Ended December 31, 2017 As Previously Reported Adjustments As Restated (in thousands) Operating Revenue: Passenger $ 2,362,076 $ 124,751 $ 2,486,827 Other 333,552 (145,234 ) 188,318 Total $ 2,695,628 $ (20,483 ) $ 2,675,145 Operating Expenses 2,211,856 (749 ) 2,211,107 Operating Income 483,772 (19,734 ) 464,038 Nonoperating Income (Expense) (73,217 ) — (73,217 ) Income tax expense 46,514 13,697 60,211 Net Income $ 364,041 $ (33,431 ) $ 330,610 Net Income Per Common Stock Share: Basic $ 6.86 $ (0.63 ) $ 6.23 Diluted $ 6.82 $ (0.63 ) $ 6.19 December 31, 2017 As Previously Reported Adjustments As Restated (in thousands) ASSETS Prepaid expenses and other $ 65,196 $ 13,990 $ 79,186 LIABILITIES AND SHAREHOLDERS' EQUITY Current Liabilities: Air traffic liability 545,362 43,731 589,093 Other accrued liabilities 146,283 1,310 147,593 Noncurrent Liabilities: Other liabilities and deferred credits 95,636 (19,795 ) 75,841 Noncurrent frequent flyer deferred revenue — 149,764 149,764 Deferred tax liability 174,344 (40,203 ) 134,141 Shareholders' Equity: Accumulated income 913,951 (120,817 ) 793,134

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2018
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Information related to amounts reclassified from AOCI	Reclassifications out of accumulated other comprehensive loss by component is as follows: Year ended December 31, Details about accumulated other comprehensive loss components 2018 2017 2016 Affected line items in the statement where net income is presented (in thousands) Derivatives designated as hedging instruments under ASC 815 Foreign currency derivative (gains) losses, net $ (1,380 ) $ (2,391 ) $ 196 Passenger revenue Interest rate derivative losses, net — — 944 Interest expense Total before tax (1,380 ) (2,391 ) 1,140 Tax expense (benefit) 339 906 (438 ) Total, net of tax $ (1,041 ) $ (1,485 ) $ 702 Amortization of defined benefit pension items Actuarial loss $ 2,708 $ 8,792 $ 7,730 Nonoperating Income (Expense), Other, net Prior service cost 225 254 227 Nonoperating Income (Expense), Other, net Partial settlement and curtailment loss — 10,384 — Other nonoperating special items Loss on plan termination — 35,201 — Other nonoperating special items Total before tax 2,933 54,631 7,957 Tax benefit (671 ) (21,519 ) (3,048 ) Total, net of tax $ 2,262 $ 33,112 $ 4,909 Short-term investments Realized (gain) loss on sales of investments, net 107 (32 ) (108 ) Nonoperating Income (Expense), Other, net Total before tax 107 (32 ) (108 ) Tax expense (26 ) 12 41 Total, net of tax 81 (20 ) (67 ) Total reclassifications for the period $ 1,302 $ 31,607 $ 5,544
Schedule of amounts included in accumulated other comprehensive loss, net of taxes	A rollforward of the amounts included in accumulated other comprehensive loss, net of taxes, is as follows: Year ended December 31, 2018 Foreign Defined Short-Term Investments Total (in thousands) Beginning balance $ 1,249 $ (75,953 ) $ (560 ) $ (75,264 ) Reclassification of stranded tax effects (a) 269 (12,659 ) (120 ) (12,510 ) Other comprehensive income (loss) before reclassifications, net of tax 2,840 (9,505 ) (3 ) (6,668 ) Amounts reclassified from accumulated other comprehensive income (loss), net of tax (1,041 ) 2,262 81 1,302 Net current-period other comprehensive income (loss), net of tax 1,799 (7,243 ) 78 (5,366 ) Ending balance $ 3,317 $ (95,855 ) $ (602 ) $ (93,140 ) (a) Amounts represent the reclassification from AOCI to RE of the stranded tax effectives resulting from the enactment of the Tax Act and adoption of ASU 2018-02. Year ended December 31, 2017 Foreign Defined Short-Term Investments Total (in thousands) Beginning balance $ 7,071 $ (110,202 ) $ (362 ) $ (103,493 ) Other comprehensive income (loss) before reclassifications, net of tax (4,337 ) 1,137 (178 ) (3,378 ) Amounts reclassified from accumulated other comprehensive income (loss), net of tax (1,485 ) 33,112 (20 ) 31,607 Net current-period other comprehensive income (loss), net of tax (5,822 ) 34,249 (198 ) 28,229 Ending balance $ 1,249 $ (75,953 ) $ (560 ) $ (75,264 )

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Schedule of earnings (loss) per share basic and diluted	The following table shows our computation of basic and diluted earnings per share: Year Ended December 31, 2018 2017 2016 (in thousands, except for per share data) Numerator: Net Income $ 233,200 $ 330,610 $ 224,120 Denominator: Weighted average common shares outstanding—Basic 50,338 53,074 53,502 Assumed exercise of stock options and awards 150 339 450 Assumed exercise of convertible note premium — — 6 Weighted average common shares outstanding—Diluted 50,488 53,413 53,958 Net Income Per Common Stock Share: Basic $ 4.63 $ 6.23 $ 4.19 Diluted $ 4.62 $ 6.19 $ 4.15

Short-Term Investments (Tables)

Short-Term Investments (Tables)	12 Months Ended
	Dec. 31, 2018
Short-term Investments [Abstract]
Summary of short-term investments	The following is a summary of short-term investments held as of December 31, 2018 and 2017 : December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) Corporate debt $ 142,748 $ 49 $ (695 ) $ 142,102 U.S. government and agency debt 37,163 3 (59 ) 37,107 Municipal bonds 9,903 — (32 ) 9,871 Other fixed income securities 43,183 2 (24 ) 43,161 Total short-term investments $ 232,997 $ 54 $ (810 ) $ 232,241 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (in thousands) Corporate debt $ 165,610 $ 8 $ (535 ) $ 165,083 U.S. government and agency debt 59,054 1 (215 ) 58,840 Municipal bonds 21,517 — (104 ) 21,413 Other fixed income securities 23,973 1 (13 ) 23,961 Total short-term investments $ 270,154 $ 10 $ (867 ) $ 269,297
Contractual maturities of short-term investments	Contractual maturities of short-term investments as of December 31, 2018 are shown below. Under 1 Year 1 to 5 Years Total (in thousands) Corporate debt $ 69,957 $ 72,145 $ 142,102 U.S. government and agency debt 28,164 8,943 37,107 Municipal bonds 8,288 1,583 9,871 Other fixed income securities 35,990 7,171 43,161 Total short-term investments $ 142,399 $ 89,842 $ 232,241

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Financial assets and liabilities measured at fair value on a recurring basis	The following tables present information about the Company's financial assets and liabilities measured at fair value on a recurring basis: Fair Value Measurements as of December 31, 2018 Total Level 1 Level 2 Level 3 (in thousands) Cash equivalents $ 121,154 $ 42,175 $ 78,979 $ — Restricted cash — — — — Short-term investments 232,241 — 232,241 — Fuel derivative contracts: 1,572 — 1,572 — Foreign currency derivatives 4,579 — 4,579 — Total assets measured at fair value $ 359,546 $ 42,175 $ 317,371 $ — Foreign currency derivatives 1,347 — 1,347 — Total liabilities measured at fair value $ 1,347 $ — $ 1,347 $ — Fair Value Measurements as of December 31, 2017 Total Level 1 Level 2 Level 3 (in thousands) Cash equivalents $ 62,310 $ 27,807 $ 34,503 $ — Restricted cash 1,000 1,000 — — Short-term investments 269,297 — 269,297 — Fuel derivative contracts: Crude oil call options 20,272 — 20,272 — Jet fuel swaps 336 — 336 — Foreign currency derivatives 4,300 — 4,300 — Total assets measured at fair value $ 357,515 $ 28,807 $ 328,708 $ — Foreign currency derivatives 1,713 — 1,713 — Total liabilities measured at fair value $ 1,713 $ — $ 1,713 $ —
Schedule of debt (excluding obligations under capital leases) measured at fair value	The table below presents the Company's debt (excluding obligations under capital leases and financing obligations) measured at fair value: Fair Value of Debt December 31, 2018 December 31, 2017 Carrying Fair Value Carrying Fair Value Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 (in thousands) (in thousands) $ 467,760 $ 461,805 $ — $ — $ 461,805 $ 433,072 $ 444,099 $ — $ — $ 444,099

Financial Derivative Instrume_2

Financial Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of realized and unrealized gains and losses recorded as nonoperating income (expense)	The following table reflects the amount of realized and unrealized gains and losses recorded as nonoperating income (expense) in the Consolidated Statements of Operations. Year Ended December 31, 2018 2017 2016 (in thousands) Gains (losses) realized at settlement $ 25,563 $ (534 ) $ (27,572 ) Prior period unrealized amounts (11,792 ) (7,946 ) 39,731 Unrealized gains (losses) that will settle in future periods (8,181 ) 11,792 7,947 Gains on fuel derivatives recorded as Nonoperating income (expense) $ 5,590 $ 3,312 $ 20,106
Schedule of fair value of the asset and liability derivatives and net derivative positions	The following tables present the gross fair value of asset and liability derivatives that are designated as hedging instruments under ASC 815 and derivatives that are not designated as hedging instruments under ASC 815, as well as the net derivative positions and location of the asset and liability balances within the Consolidated Balance Sheets. Derivative positions as of December 31, 2018 Balance Sheet Notional Amount Final Gross fair Gross fair Net (in thousands) (in thousands) Derivatives designated as hedges Foreign currency derivatives Prepaid expenses and other 15,933,550 Japanese Yen December 2019 $ 3,922 $ (915 ) $ 3,007 Long-term prepayments and other 4,491,350 Japanese Yen December 2020 633 (292 ) 341 Derivatives not designated as hedges Foreign currency derivatives Other accrued liabilities 832,900 Japanese Yen March 2019 24 (140 ) (116 ) Fuel derivative contracts Prepaid expenses and other 95,256 gallons December 2019 1,572 — 1,572 Derivative positions as of December 31, 2017 Balance Sheet Notional Amount Final Gross fair Gross fair Net (in thousands) (in thousands) Derivatives designated as hedges Foreign currency derivatives Prepaid expenses and other 16,732,375 Japanese Yen December 2018 $ 3,737 $ (1,441 ) $ 2,296 Long-term prepayments and other 4,666,700 Japanese Yen December 2019 546 (195 ) 351 Derivatives not designated as hedges Foreign currency derivatives Other accrued liabilities 866,150 Japanese Yen March 2018 17 (77 ) (60 ) Fuel derivative contracts Prepaid expenses and other 94,332 gallons December 2018 20,608 — 20,608
Schedule of realized and unrealized gains and losses of derivatives designated as cash flow hedges	The following table reflects the impact of cash flow hedges designated for hedge accounting treatment and their location within the Consolidated Statements of Comprehensive Income. (Gain) Loss recognized in AOCI on derivatives (effective portion) (Gain) Loss reclassified from AOCI into income (effective portion) Gain recognized in nonoperating (income) expense (ineffective portion) Year ended December 31, Year ended December 31, Year ended December 31, 2018 2017 2016 2018 2017 2016 2018 2017 2016 (in thousands) Foreign currency derivatives $ (3,766 ) $ 6,983 $ (3,350 ) $ (1,380 ) $ (2,391 ) $ 196 $ — $ — $ — Interest rate derivatives — — 923 — — 944 — — —

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of gross carrying values of intangible assets less accumulated amortization	The following tables summarize the gross carrying values of intangible assets less accumulated amortization, and the useful lives assigned to each asset. As of December 31, 2018 Gross carrying Accumulated Net book value Approximate (in thousands) Favorable aircraft maintenance contracts $ 8,740 $ (8,284 ) $ 456 14 (*) Trade name 13,500 — 13,500 Indefinite Other 1,388 (1,195 ) 193 3 Total intangible assets $ 23,628 $ (9,479 ) $ 14,149 As of December 31, 2017 Gross carrying Accumulated Net book value Approximate (in thousands) Favorable aircraft maintenance contracts $ 8,740 $ (7,708 ) $ 1,032 14 (*) Trade name 13,500 — 13,500 Indefinite Other 1,388 (733 ) 655 3 Total intangible assets $ 23,628 $ (8,441 ) $ 15,187 _______________________________________________________________________________ (*) Weighted average is based on the gross carrying values and estimated useful lives as of June 2, 2005 (the date Hawaiian emerged from bankruptcy).

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of long-term debt, including capital lease obligations	Long-term debt (including capital and financing lease obligations) net of unamortized discounts is outlined as follows: 2018 2017 (in thousands) Class A EETC, fixed interest rate of 3.9%, semiannual principal and interest payments, remaining balance due at maturity in January 2026(1) $ 245,845 $ 263,864 Class B EETC, fixed interest rate of 4.95%, semiannual principal and interest payments, remaining balance of due at maturity in January 2022(1) 88,608 94,580 Boeing 717-200 Aircraft Facility Agreements, fixed interest rate of 8%, monthly principal and interest payments, remaining balance due at maturity in June 2019(2) 50,376 74,629 Japanese Yen denominated financing, fixed interest rate of 1.05%, quarterly principal and interest payments, remaining balance due at maturity in May 2030 42,116 — Japanese Yen denominated financing, fixed interest rate of 1.01%, semiannual principal and interest payments, remaining balance due at maturity in June 2030 40,815 — Capital & Financing lease obligations (see Note 9) 252,517 149,039 Total debt, capital, and financing lease obligations $ 720,277 $ 582,112 Less: Unamortized debt discount and debt issuance costs (10,496 ) (11,441 ) Current maturities (101,097 ) (59,470 ) Long-Term Debt, less discount, Capital, and Financing Lease Obligations $ 608,684 $ 511,201 _______________________________________________________________________________ (1) The equipment notes underlying these EETCs are the direct obligations of Hawaiian. (2) Aircraft Facility Agreements are secured by aircraft.
Schedule of maturities of long-term debt	As of December 31, 2018 , the scheduled maturities of long-term debt are as follows (in thousands): 2019 $ 81,075 2020 29,597 2021 56,557 2022 63,665 2023 28,466 Thereafter 208,400 $ 467,760

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Schedule of future minimum rental payments under capital and operating leases	As of December 31, 2018 , the scheduled future minimum rental payments under capital leases and operating leases with non-cancellable basic terms of more than one year are as follows: Capital & Financing Leases Operating Leases Aircraft Other Aircraft Other (in thousands) 2019 $ 24,850 $ 7,909 $ 106,448 $ 5,730 2020 24,850 5,908 90,417 5,709 2021 24,850 4,630 74,315 5,846 2022 24,705 4,870 68,208 5,930 2023 21,370 8,207 59,925 5,975 Thereafter 75,891 111,651 159,271 89,699 196,516 143,175 $ 558,584 $ 118,889 Less amounts representing interest (35,502 ) (51,672 ) Present value of minimum capital & financing lease payments $ 161,014 $ 91,503

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Significant components of income tax expense	The significant components of income tax expense are as follows: Years Ended December 31, 2018 2017 2016 (in thousands) Current Federal $ 23,438 $ 49,835 $ 94,459 State 9,087 11,471 13,201 $ 32,525 $ 61,306 $ 107,660 Deferred Federal $ 29,782 $ (7,017 ) $ 25,948 State 5,651 5,922 3,491 $ 35,433 $ (1,095 ) $ 29,439 Income tax expense $ 67,958 $ 60,211 $ 137,099
Schedule of reconciliation between income tax expense and amounts computed at the statutory federal income tax rate	The income tax expense differed from amounts computed at the statutory federal income tax rate as follows: Years Ended December 31, 2018 2017 2016 (in thousands) Income tax expense computed at the statutory federal rate $ 63,243 $ 136,788 $ 126,427 Increase (decrease) resulting from: State income taxes, net of federal tax effect 11,643 11,095 10,714 Nondeductible meals 797 1,146 1,100 Tax Cuts and Jobs Act impact (9,333 ) (82,978 ) — Excess tax benefits from stock issuance (188 ) (5,288 ) — Other 1,796 (552 ) (1,142 ) Income tax expense $ 67,958 $ 60,211 $ 137,099
Components of deferred tax asset and liabilities	The components of the Company's deferred tax assets and liabilities were as follows: December 31, 2018 2017 (in thousands) Deferred tax assets: Accumulated pension and other postretirement benefits $ 45,663 $ 54,784 Leases 3,515 4,490 Air traffic liability and frequent flyer liability 70,206 53,102 Partnership deferred revenue 9,697 2,455 State net operating loss carryforwards 2,547 2,547 Accrued compensation 15,843 7,627 Other accrued assets 11,758 11,661 Fuel derivative contracts 2,390 2,156 Other assets 14,031 10,187 Total gross deferred tax assets 175,650 149,009 Less: Valuation allowance (2,547 ) (2,547 ) Net deferred tax assets $ 173,103 $ 146,462 Deferred tax liabilities: Intangible assets $ (3,297 ) $ (3,432 ) Property and equipment, principally accelerated depreciation (324,614 ) (265,293 ) Other liabilities (12,962 ) (11,878 ) Total deferred tax liabilities (340,873 ) (280,603 ) Net deferred tax liability $ (167,770 ) $ (134,141 )
Reconciliation of unrecognized tax benefits related to uncertain tax positions	The table below reconciles beginning and ending amounts of unrecognized tax benefits related to uncertain tax positions: 2018 2017 2016 (in thousands) Balance at January 1 $ 4,081 $ 3,329 $ — Increases related to prior year tax positions 336 253 2,830 Increases related to current year tax positions 669 499 499 Balance at December 31 $ 5,086 $ 4,081 $ 3,329

Contract Termination Expense _2

Contract Termination Expense and Special Items (Tables)	12 Months Ended
	Dec. 31, 2018
Unusual or Infrequent Items, or Both [Abstract]
Schedule of Special Charges	Contract terminations expense and special items in the statements of consolidated operations consisted of the following: Year Ended December 31, 2018 2017 2016 (in thousands) Operating Contract terminations expense (1) $ 35,322 $ — $ — Operating special items: Loss on sale of aircraft (3) — 4,771 — Collective bargaining agreement (4)(6) — 18,679 38,781 Impairment charge in connection with its owned Boeing 767-300 fleet and related assets (5) — — 49,361 Termination of Boeing 767-300 engine maintenance contract (7) — — 21,000 Total Contract terminations expense and Operating special items $ 35,322 $ 23,450 $ 109,142 Nonoperating Other nonoperating special items: Partial settlement and curtailment loss (2) $ — $ 10,384 $ — Loss on plan termination (2) — 35,201 — Total Other nonoperating special items $ — $ 45,585 $ — Contract terminations expense (1) During the twelve months ended December 31, 2018, the Company terminated two contracts which incurred a total of $35.3 million in contract terminations expense. The transactions are described below: In February 2018, the Company exercised its right to terminate the aircraft purchase agreement between the Company and Airbus for six Airbus A330-800neo aircraft and the purchase rights for an additional six Airbus A330-800neo aircraft. To terminate the purchase agreement, the Company was obligated to repay Airbus for concessions received relating to a prior firm order, training credits, as well as forfeit the pre-delivery progress payments made towards the flight equipment. The Company recorded a contract terminations expense to reflect a portion of the termination penalty within the Consolidated Statements of Operations. In January 2018, the Company entered into a transaction with its lessor to early terminate and purchase three Boeing 767-300 aircraft leases and concurrently entered into a forward sale agreement for the same three Boeing 767-300 aircraft, including two Pratt & Whitney 4060 engines for each aircraft. These aircraft were previously accounted for as operating leases. In order to exit the lease and purchase the aircraft, the Company agreed to pay a total of $67.1 million (net of all deposits) of which a portion was expensed immediately and recognized as a contract termination fee. The expensed amount represents the total purchase price amount over fair value of the aircraft purchased as of the date of the transaction. Special items (2) In August 2017, the Company terminated the Hawaiian Airlines, Inc. Salaried & IAM Merged Pension Plan (the Merged Plan) and settled a portion of its pilots' other post-retirement medical plan liability. In connection with the reduction of these liabilities, the Company recorded one-time Other nonoperating special charges of $35.2 million related to the Merged Plan termination and $10.4 million related to the other post-retirement (OPEB) medical plan partial settlement. (3) In April 2017, the Company executed a sale leaseback transaction with an independent third party for three Boeing 767-300 aircraft. The lease terms for the three aircraft commenced in April 2017 and end between November 2018 through January 2019. During the twelve months ended December 31, 2017, the Company recorded a loss on sale of aircraft of $4.8 million . (4) In February 2017, the Company reached a tentative agreement with ALPA, covering the Company's pilots. In March 2017, the Company received notice from ALPA that the agreement was ratified by ALPA's members. The agreement became effective April 1, 2017 and has a term of 63 months. The agreement includes, among other various benefits, a pay adjustment and ratification bonus computed based on previous service. During the twelve months ended December 31, 2017, the Company expensed $18.7 million principally related to a one-time payment to reduce the Company's future 401K employer contribution for certain pilot groups, which is not recoverable once paid. (5) The impairment analysis and ultimate charge was triggered by the decision in the fourth quarter of 2016 to exit the Boeing 767-300 fleet in 2018. The early exit of the Boeing 767-300 fleet was made possible by the Company's decision to acquire one Airbus A330-200 (delivered in 2017), lease two additional Airbus A321neo's (delivered in 2018 and in addition to the Company's existing aircraft orders), and the Company's ability to early terminate its long-term power-by-the-hour maintenance contract for the Boeing 767-300 fleet. This fleet change allows the Company to streamline the fleet, simplify operations, and potentially reduce costs in the future. In order to assess whether there was an impairment of the Boeing 767-300 asset group, the Company compared the projected undiscounted cash flows of the fleet to the book value of the assets and determined the book value was in excess of the undiscounted cash flows. The Company estimated the fair value of the owned Boeing 767-300 fleet assets using third party pricing information and quotes from potential buyers, which resulted in a $49.4 million impairment charge ( $0.92 per diluted share). The Company's determination of fair value considered attributes specific to the owned Boeing 767-300 fleet and aircraft condition (e.g. age, maintenance requirements, cycles, etc.). (6) In 2016, the Company accrued $34.0 million associated with the tentative agreement with ALPA related to past service (prior to January 1, 2017) and also elected to pay a $4.8 million profit sharing bonus payment to other labor groups related to prior period service. (7) In connection with the decision to exit the Boeing 767-300 fleet, the Company negotiated a termination of its Boeing 767-300 maintenance agreement and recorded a $21.0 million charge related to the amount paid to terminate the contract.

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
Summary of changes	The following tables summarize changes to projected benefit obligations, plan assets, funded status and applicable amounts included in the Consolidated Balance Sheets: 2018 2017 Pension Other Pension Other (in thousands) Change in benefit obligations Benefit obligations, beginning of year $ (426,066 ) $ (120,417 ) $ (462,762 ) $ (224,316 ) Service cost (352 ) (8,119 ) (480 ) (12,403 ) Interest cost (15,599 ) (4,708 ) (18,042 ) (8,022 ) Actuarial gains (losses) 22,677 6,007 (42,775 ) 17,484 Benefits paid 21,253 4,639 23,999 4,587 Less: federal subsidy on benefits paid N/A (50 ) N/A (57 ) Plan amendments — — — 381 Settlements — — 73,994 101,929 Benefit obligation at end of year (a) $ (398,087 ) $ (122,648 ) $ (426,066 ) $ (120,417 ) Change in plan assets Fair value of assets, beginning of year $ 296,386 $ 26,078 $ 302,982 $ 24,751 Actual return on plan assets (17,339 ) (1,697 ) 42,652 2,629 Employer contribution 50,230 6,621 48,745 3,285 Benefits paid (21,253 ) (4,639 ) (23,999 ) (4,587 ) Settlements — — (73,994 ) — Fair value of assets at end of year $ 308,024 $ 26,363 $ 296,386 $ 26,078 Unfunded status at December 31 $ (90,063 ) $ (96,285 ) $ (129,680 ) $ (94,339 ) Amounts recognized in the statement of financial position consist of: Current benefit liability $ (386 ) $ (3,342 ) $ (214 ) $ (3,017 ) Noncurrent benefit liability (89,677 ) (92,943 ) (129,466 ) (91,322 ) $ (90,063 ) $ (96,285 ) $ (129,680 ) $ (94,339 ) Amounts recognized in accumulated other comprehensive loss Unamortized actuarial loss (gain) $ 124,560 $ (15,606 ) $ 112,417 $ (13,521 ) Prior service cost (credit) — 1,737 — 1,962 $ 124,560 $ (13,869 ) $ 112,417 $ (11,559 ) _______________________________________________________________________________ (a) The accumulated pension benefit obligation as of December 31, 2018 and 2017 was $397.5 million and $424.2 million , respectively.
Schedule of net periodic benefit cost	The following table sets forth the net periodic benefit cost: 2018 2017 2016 Pension Other Pension Other Pension Other (in thousands) Components of Net Periodic Benefit Cost Service cost $ 352 $ 8,119 $ 480 $ 12,403 $ 681 $ 13,618 Other cost: Interest cost 15,599 4,708 18,042 8,022 19,969 10,227 Expected return on plan assets (20,948 ) (1,413 ) (17,291 ) (1,106 ) (16,746 ) (1,137 ) Recognized net actuarial loss (gain) 3,482 (774 ) 9,033 (241 ) 7,526 204 Prior service cost (credit) — 225 (28 ) 282 (2 ) 229 Total other components of the net periodic benefit cost $ (1,867 ) $ 2,746 $ 9,756 $ 6,957 $ 10,747 $ 9,523 Settlement and curtailment loss — — 35,201 10,384 — — Net periodic benefit cost $ (1,515 ) $ 10,865 $ 45,437 $ 29,744 $ 11,428 $ 23,141 Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss Current year actuarial (gain) loss $ 15,625 $ (2,858 ) $ 17,414 $ (18,972 ) $ 25,559 $ (7,677 ) Current year prior service cost — — — (381 ) (932 ) — Amortization of actuarial gain (loss) (3,482 ) 774 (9,033 ) 241 (7,526 ) (204 ) Amortization of prior service credit (cost) — (225 ) 28 (282 ) 2 (229 ) Settlement and curtailment loss — — (35,201 ) (10,384 ) — — Total recognized in other comprehensive loss $ 12,143 $ (2,309 ) $ (26,792 ) $ (29,778 ) $ 17,103 $ (8,110 ) Total recognized in net periodic benefit cost and other comprehensive loss $ 10,628 $ 8,556 $ 18,645 $ (34 ) $ 28,531 $ 15,031
Schedule of weighted average actuarial assumptions	The weighted average actuarial assumptions used to determine the net periodic benefit expense and the projected benefit obligation were as follows: Pension Postretirement Disability 2018 2017 2018 2017 2018 2017 Discount rate to determine net periodic benefit expense 3.70 % 4.19 % 3.71 % 4.29 % 3.72 % 4.24 % Discount rate to determine projected benefit obligation 4.35 % 3.70 % 4.36 % 3.71 % 4.39 % 3.72 % Expected return on plan assets 7.33 % ** 6.34 % N/A N/A 4.90 % ** 4.60 % Rate of compensation increase Various * Various * N/A N/A Various * Various * Health care trend rate to determine net periodic benefit expense N/A N/A 7.25 % 7.75 % N/A N/A Ultimate trend rate N/A N/A 4.75 % 7.25 % N/A N/A Years to reach ultimate trend rate N/A N/A 5 6 N/A N/A Health care trend rate to determine projected benefit obligation N/A N/A 6.75 % 7.25 % N/A N/A Ultimate trend rate N/A N/A 4.75 % 4.75 % N/A N/A Years to reach ultimate trend rate N/A N/A 4 5 N/A N/A _______________________________________________________________________________ * Differs for each pilot based on current fleet and seat position on the aircraft and seniority service. Negotiated salary increases and expected changes in fleet and seat positions on the aircraft are included in the assumed rate of compensation increase, which ranged from 2.0% to 7.3% in both 2018 and 2017 ). ** Expected return on plan assets used to determine the net periodic benefit expense for 2019 is 6.91% for Pension and 4.90% for Disability.
Summary of effects a change in the assumed health care cost trend rates	A change in the assumed health care cost trend rates would have the following effects: 100 Basis 100 Basis (in thousands) Effect on postretirement benefit obligation at December 31, 2018 $ 8,048 $ (6,916 ) Effect on total service and interest cost for the year ended December 31, 2018 892 (744 )
Estimated amounts that will be amortized from accumulated other comprehensive income into net periodic benefit cost	Estimated amounts that will be amortized from accumulated other comprehensive income into net periodic benefit cost in 2019 are as follows: Pension Other (in thousands) Actuarial (gain) loss $ 4,031 $ (707 ) Amortization of prior service cost — 225 To be recognized in net periodic benefit cost from accumulated other comprehensive (gain) loss $ 4,031 $ (482 )
Schedule of actual allocation of the pension and disability plan assets and the target allocation of assets by category	The actual allocation of the Company's pension and disability plan assets and the target allocation of assets by category at December 31, 2018 are as follows: Asset Allocation for Pilots pension and VEBA Plans 2018 Target Equity securities 57 % 60 % Fixed income securities 39 % 35 % Real estate investment trusts 4 % 5 % 100 % 100 %
Schedule of fair values of pension plan and other postretirement plan investments	The table below presents the fair value of the Company's pension plan and other postretirement plan investments (excluding cash and receivables): Fair Value Measurements as of December 31, 2018 2017 (in thousands) Pension Plan Assets: Equity index funds $ 175,583 $ 177,252 Fixed income funds 110,650 100,504 Real estate investment fund 14,718 14,587 Insurance company pooled separate account 7,076 4,044 Total $ 308,027 $ 296,387 Postretirement Assets: Common collective trust fund $ 26,217 $ 25,973
Projected benefit payments	The Company projects that Hawaiian's pension plans and other postretirement benefit plans will make the following benefit payments, which reflect expected future service, during the years ending December 31: Other Benefits Pension Gross Expected (in thousands) 2019 $ 23,343 $ 5,254 $ (47 ) 2020 24,471 6,040 (51 ) 2021 25,252 6,848 (54 ) 2022 25,730 7,425 (56 ) 2023 26,189 8,051 (58 ) 2024 - 2028 132,395 47,804 (304 ) $ 257,380 $ 81,422 $ (570 )

Capital Stock and Share-based_2

Capital Stock and Share-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Performance-Based Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Summary of Awards	The following table summarizes information about performance-based stock awards: Number of units Weighted Non-vested at January 1, 2016 678,742 $ 10.53 Granted 117,849 33.94 Vested (349,403 ) 7.32 Forfeited (24,891 ) 13.45 Non-vested at December 31, 2016 422,297 $ 14.00 Granted 355,897 43.51 Vested (358,619 ) 12.71 Forfeited (37,619 ) 27.60 Non-vested at December 31, 2017 381,956 $ 28.03 Granted 160,348 39.09 Vested (211,053 ) 26.28 Forfeited (69,399 ) 39.42 Non-vested at December 31, 2018 261,852 $ 33.01
Service-Based Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Summary of Awards	The following table summarizes information about outstanding service-based stock awards: Number of units Weighted Non-vested at January 1, 2016 270,721 $ 15.02 Granted 110,276 37.08 Vested (169,218 ) 16.32 Forfeited (16,330 ) 20.46 Non-vested at December 31, 2016 195,449 $ 24.29 Granted 22,898 49.95 Vested (110,575 ) 23.80 Forfeited (16,394 ) 26.71 Non-vested at December 31, 2017 91,378 $ 28.12 Granted 128,617 38.71 Vested (68,803 ) 38.98 Forfeited (8,241 ) 38.03 Non-vested at December 31, 2018 142,951 $ 38.77

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Gross committed expenditures and committed financings	The gross committed expenditures for upcoming aircraft deliveries and other commitments for the next five years and thereafter are detailed below: Aircraft and aircraft related Other Total Committed (in thousands) 2019 $ 330,089 $ 74,621 $ 404,710 2020 162,270 69,729 231,999 2021 303,184 66,104 369,288 2022 431,210 58,499 489,709 2023 236,639 53,357 289,996 Thereafter 477,788 164,846 642,634 $ 1,941,180 $ 487,156 $ 2,428,336
Schedule of firm aircraft and engine orders and purchase rights	As of December 31, 2018 , the Company had the following capital commitments consisting of firm aircraft and engine orders and purchase rights: Aircraft Type Firm Purchase Expected Delivery Dates A321neo aircraft 7 3 Between 2019 and 2020 B787-9 aircraft 10 10 Between 2021 and 2025 Pratt & Whitney spare engines: A321neo spare engines 1 2 In 2019 General Electric GEnx spare engines: B787-9 spare engines 2 2 Between 2021 and 2025

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract]
Schedule of non-cash investing and financing activities	Supplemental disclosures of cash flow information and non-cash investing and financing activities were as follows: Year Ended December 31, 2018 2017 2016 (in thousands) Cash payments for interest (net of amounts capitalized) $ 24,343 $ 23,134 $ 29,751 Cash payments for income taxes 16,063 65,812 92,934 Investing and Financing Activities Not Affecting Cash: Property and equipment acquired through a capital or financing lease 119,530 72,996 * 6,092 Maintenance hangar project (see Note 9) — — 72,996 * * Amount was reclassified from an other liability as of December 31, 2016 to a financing (lease) liability when completed and placed into service as of December 31, 2017.

Condensed Consolidating Finan_2

Condensed Consolidating Financial Information (Tables)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Schedule of Condensed Consolidating Statements of Operations and Comprehensive Income (Loss)	Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) Year Ended December 31, 2018 Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) Operating Revenue $ — $ 2,827,215 $ 10,601 $ (405 ) $ 2,837,411 Operating Expenses: Aircraft fuel, including taxes and delivery — 599,544 — — 599,544 Wages and benefits — 684,719 — — 684,719 Aircraft rent — 125,883 78 — 125,961 Maintenance materials and repairs — 233,503 6,256 — 239,759 Aircraft and passenger servicing — 157,796 — — 157,796 Commissions and other selling (5 ) 129,332 128 (140 ) 129,315 Depreciation and amortization — 134,651 5,215 — 139,866 Other rentals and landing fees — 126,509 394 — 126,903 Purchased services 195 130,665 852 (61 ) 131,651 Contract terminations expense — 35,322 — — 35,322 Other 6,527 142,125 3,759 (204 ) 152,207 Total 6,717 2,500,049 16,682 (405 ) 2,523,043 Operating Income (Loss) (6,717 ) 327,166 (6,081 ) — 314,368 Nonoperating Income (Expense): Undistributed net income of subsidiaries 238,365 — — (238,365 ) — Other nonoperating special items — — — — — Interest expense and amortization of debt discounts and issuance costs (3 ) (32,861 ) (137 ) — (33,001 ) Interest income 185 9,057 — — 9,242 Capitalized interest — 7,887 — — 7,887 Other components of net periodic benefit cost — (825 ) — — (825 ) Gains on fuel derivatives — 5,590 — — 5,590 Other, net (4 ) (2,117 ) 18 — (2,103 ) Total 238,543 (13,269 ) (119 ) (238,365 ) (13,210 ) Income (Loss) Before Income Taxes 231,826 313,897 (6,200 ) (238,365 ) 301,158 Income tax expense (benefit) (1,374 ) 70,634 (1,302 ) — 67,958 Net Income (Loss) $ 233,200 $ 243,263 $ (4,898 ) $ (238,365 ) $ 233,200 Comprehensive Income (Loss) $ 227,834 $ 237,897 $ (4,898 ) $ (232,999 ) $ 227,834 Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) Year Ended December 31, 2017 (a) Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) Operating Revenue $ — $ 2,667,435 $ 8,102 $ (392 ) $ 2,675,145 Operating Expenses: Aircraft fuel, including taxes and delivery — 440,383 — — 440,383 Wages and benefits — 632,997 — — 632,997 Aircraft rent — 137,289 475 — 137,764 Maintenance materials and repairs — 215,473 4,080 — 219,553 Aircraft and passenger servicing — 144,853 — — 144,853 Commissions and other selling 84 126,674 129 (137 ) 126,750 Depreciation and amortization — 109,458 3,819 — 113,277 Other rentals and landing fees — 116,763 — — 116,763 Purchased services 478 109,436 933 (60 ) 110,787 Special items — 23,450 — — 23,450 Other 5,393 137,494 1,838 (195 ) 144,530 Total 5,955 2,194,270 11,274 (392 ) 2,211,107 Operating Income (Loss) (5,955 ) 473,165 (3,172 ) — 464,038 Nonoperating Income (Expense): Undistributed net income of subsidiaries 333,476 — — (333,476 ) — Other nonoperating special items — (45,585 ) — — (45,585 ) Interest expense and amortization of debt discounts and issuance costs — (30,901 ) — — (30,901 ) Interest income — 5,830 302 — 6,132 Capitalized interest — 8,437 — — 8,437 Other components of net periodic benefit cost — (16,713 ) — — (16,713 ) Gains on fuel derivatives — 3,312 — — 3,312 Other, net — 2,101 — — 2,101 Total 333,476 (73,519 ) 302 (333,476 ) (73,217 ) Income (Loss) Before Income Taxes 327,521 399,646 (2,870 ) (333,476 ) 390,821 Income tax expense (benefit) (3,089 ) 63,300 — — 60,211 Net Income (Loss) $ 330,610 $ 336,346 $ (2,870 ) $ (333,476 ) $ 330,610 Comprehensive Income (Loss) $ 358,841 $ 364,575 $ (2,870 ) $ (361,707 ) $ 358,839 (a) Amounts adjusted due to the adoption of ASC No. 606, Revenue from Contracts with Customers . See Note 1 to Consolidated Financial Statements for additional information. Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) Year Ended December 31, 2016 (a) Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) Operating Revenue $ — $ 2,426,479 $ 6,297 $ (363 ) $ 2,432,413 Operating Expenses: Aircraft fuel, including taxes and delivery — 344,322 — — 344,322 Wages and benefits — 535,264 — — 535,264 Aircraft rent — 124,521 44 — 124,565 Maintenance materials and repairs — 225,707 3,337 — 229,044 Aircraft and passenger servicing — 129,899 — — 129,899 Commissions and other selling 72 122,717 124 (126 ) 122,787 Depreciation and amortization — 104,689 3,439 — 108,128 Other rentals and landing fees — 108,087 — — 108,087 Purchased services 149 95,450 660 (60 ) 96,199 Special items — 109,142 — — 109,142 Other 5,300 121,104 1,262 (177 ) 127,489 Total 5,521 2,020,902 8,866 (363 ) 2,034,926 Operating Income (Loss) (5,521 ) 405,577 (2,569 ) — 397,487 Nonoperating Income (Expense): Undistributed net income of subsidiaries 226,561 — — (226,561 ) — Interest expense and amortization of debt discounts and issuance costs 117 (36,729 ) — — (36,612 ) Interest income 265 3,742 — — 4,007 Capitalized interest — 2,651 — — 2,651 Other components of net periodic benefit cost — (20,270 ) — — (20,270 ) Gains on fuel derivatives — 20,106 — — 20,106 Loss on extinguishment of debt — (10,473 ) — — (10,473 ) Other, net — 4,323 — — 4,323 Total 226,943 (36,650 ) — (226,561 ) (36,268 ) Income (Loss) Before Income Taxes 221,422 368,927 (2,569 ) (226,561 ) 361,219 Income tax expense (benefit) (2,698 ) 139,797 — — 137,099 Net Income (Loss) $ 224,120 $ 229,130 $ (2,569 ) $ (226,561 ) $ 224,120 Comprehensive Income (Loss) $ 219,903 $ 224,914 $ (2,569 ) $ (222,344 ) $ 219,904 (a) Amounts adjusted due to the adoption of ASC No. 606, Revenue from Contracts with Customers . See Note 1 to Consolidated Financial Statements for additional information.
Schedule of Condensed Consolidating Balance Sheets	Condensed Consolidating Balance Sheets December 31, 2018 Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) ASSETS Current assets: Cash and cash equivalents $ 5,154 $ 255,279 $ 8,144 $ — $ 268,577 Restricted cash — — — — — Short-term investments — 232,241 — — 232,241 Accounts receivable, net — 109,499 2,569 (234 ) 111,834 Spare parts and supplies, net — 33,942 — — 33,942 Prepaid expenses and other 165 58,296 112 — 58,573 Total 5,319 689,257 10,825 (234 ) 705,167 Property and equipment at cost — 2,756,551 92,021 — 2,848,572 Less accumulated depreciation and amortization — (648,111 ) (15,350 ) — (663,461 ) Property and equipment, net — 2,108,440 76,671 — 2,185,111 Long-term prepayments and other 62,990 185,161 899 (63,494 ) 185,556 Deferred tax assets, net — — — — — Goodwill and other intangible assets, net — 120,119 693 — 120,812 Intercompany receivable — 456,338 — (456,338 ) — Investment in consolidated subsidiaries 1,325,380 — — (1,325,380 ) — TOTAL ASSETS $ 1,393,689 $ 3,559,315 $ 89,088 $ (1,845,446 ) $ 3,196,646 LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Accounts payable $ 665 $ 139,552 $ 3,163 $ (234 ) $ 143,146 Air traffic liability and current frequent flyer deferred revenue — 598,387 5,349 — 603,736 Other accrued liabilities — 157,842 312 — 158,154 Current maturities of long-term debt, less discount, and capital lease obligations — 101,052 45 — 101,097 Total 665 996,833 8,869 (234 ) 1,006,133 Long-term debt and capital lease obligations — 604,089 4,595 — 608,684 Intercompany payable 445,030 — 11,308 (456,338 ) — Other liabilities and deferred credits: Accumulated pension and other postretirement benefit obligations. — 182,620 — — 182,620 Other liabilities and deferred credits — 118,682 1,144 — 119,826 Noncurrent frequent flyer deferred revenue — 163,619 — — 163,619 Deferred tax liabilities, net — 167,770 — — 167,770 Total — 632,691 1,144 — 633,835 Shareholders' equity 947,994 1,325,702 63,172 (1,388,874 ) 947,994 TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY $ 1,393,689 $ 3,559,315 $ 89,088 $ (1,845,446 ) $ 3,196,646 Condensed Consolidating Balance Sheets December 31, 2017 (a) Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) ASSETS Current assets: Cash and cash equivalents $ 57,405 $ 125,861 $ 7,687 $ — $ 190,953 Restricted cash — 1,000 — — 1,000 Short-term investments — 269,297 — — 269,297 Accounts receivable, net 25 139,008 1,455 (209 ) 140,279 Spare parts and supplies, net — 35,361 — — 35,361 Prepaid expenses and other 171 78,933 82 — 79,186 Total 57,601 649,460 9,224 (209 ) 716,076 Property and equipment at cost — 2,326,249 74,562 — 2,400,811 Less accumulated depreciation and amortization — (546,831 ) (11,717 ) — (558,548 ) Property and equipment, net — 1,779,418 62,845 — 1,842,263 Long-term prepayments and other — 193,449 183 — 193,632 Deferred tax assets, net 31,845 — — (31,845 ) — Goodwill and other intangible assets, net — 120,695 1,155 — 121,850 Intercompany receivable — 392,791 — (392,791 ) — Investment in consolidated subsidiaries 1,137,941 — — (1,137,941 ) — TOTAL ASSETS $ 1,227,387 $ 3,135,813 $ 73,407 $ (1,562,786 ) $ 2,873,821 LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Accounts payable $ 622 $ 138,818 $ 1,574 $ (209 ) $ 140,805 Air traffic liability and current frequent flyer deferred revenue — 584,366 4,727 — 589,093 Other accrued liabilities 32 147,211 350 — 147,593 Current maturities of long-term debt, less discount, and capital lease obligations — 59,470 — — 59,470 Total 654 929,865 6,651 (209 ) 936,961 Long-term debt and capital lease obligations — 511,201 — — 511,201 Intercompany payable 381,608 — 11,183 (392,791 ) — Other liabilities and deferred credits: Accumulated pension and other postretirement benefit obligations. — 220,788 — — 220,788 Other liabilities and deferred credits — 74,736 1,105 75,841 Noncurrent frequent flyer deferred revenue — 149,764 — — 149,764 Deferred tax liabilities, net — 165,986 — (31,845 ) 134,141 Total — 611,274 1,105 (31,845 ) 580,534 Shareholders' equity 845,125 1,083,473 54,468 (1,137,941 ) 845,125 TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY $ 1,227,387 $ 3,135,813 $ 73,407 $ (1,562,786 ) $ 2,873,821 (a) Amounts adjusted due to the adoption of ASC No. 606, Revenue from Contracts with Customers . See Note 1 to Consolidated Financial Statements for additional information.
Schedule of Condensed Consolidating Statements of Cash Flows	Condensed Consolidating Statements of Cash Flows Year Ended December 31, 2018 Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) Net Cash Provided By (Used In) Operating Activities: $ (2,773 ) $ 509,405 $ 1,876 $ — $ 508,508 Cash Flows From Investing Activities: Net payments to affiliates (14,400 ) (91,515 ) — 105,915 — Additions to property and equipment, including pre-delivery deposits — (470,970 ) (15,807 ) — (486,777 ) Proceeds from purchase assignment and leaseback transactions — 87,000 — — 87,000 Proceeds from disposition of property and equipment — 46,714 — — 46,714 Purchases of investments — (210,836 ) — — (210,836 ) Sales of investments — 247,423 — — 247,423 Net cash used in investing activities (14,400 ) (392,184 ) (15,807 ) 105,915 (316,476 ) Cash Flows From Financing Activities: Long-term borrowings — 86,500 — — 86,500 Repayments of long-term debt and capital lease obligations — (68,233 ) (12 ) — (68,245 ) Dividend payments (24,171 ) — — — (24,171 ) Repurchases of common stock (102,500 ) — — — (102,500 ) Debt issuance costs — (3,350 ) — — (3,350 ) Net payments from affiliates 91,515 — 14,400 (105,915 ) — Other 78 (3,720 ) — (3,642 ) Net cash provided by (used in) financing activities (35,078 ) 11,197 14,388 (105,915 ) (115,408 ) Net increase (decrease) in cash and cash equivalents (52,251 ) 128,418 457 — 76,624 Cash, cash equivalents, and restricted cash—Beginning of Period 57,405 126,861 7,687 — 191,953 Cash, cash equivalents, and restricted cash—End of Period $ 5,154 $ 255,279 $ 8,144 $ — $ 268,577 Condensed Consolidating Statements of Cash Flows Year Ended December 31, 2017 Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) Net Cash Provided By (Used In) Operating Activities: $ (4,803 ) $ 334,433 $ 1,505 $ — $ 331,135 Cash Flows From Investing Activities: Net payments to affiliates (2,500 ) (103,254 ) — 105,754 — Additions to property and equipment, including pre-delivery deposits — (336,820 ) (4,695 ) — (341,515 ) Proceeds from purchase assignment and leaseback transactions — 33,000 — — 33,000 Proceeds from disposition of property and equipment — 941 — — 941 Purchases of investments — (231,393 ) — — (231,393 ) Sales of investments — 244,261 — — 244,261 Net cash used in investing activities (2,500 ) (393,265 ) (4,695 ) 105,754 (294,706 ) Cash Flows From Financing Activities: Repayments of long-term debt and capital lease obligations — (61,486 ) — — (61,486 ) Dividend payments (6,261 ) — — — (6,261 ) Repurchases of common stock (100,000 ) — — — (100,000 ) Debt issuance costs — (188 ) — — (188 ) Net payments from affiliates 103,254 — 2,500 (105,754 ) — Other 86 (7,618 ) — (7,532 ) Net cash provided by (used in) financing activities (2,921 ) (69,292 ) 2,500 (105,754 ) (175,467 ) Net decrease in cash and cash equivalents (10,224 ) (128,124 ) (690 ) — (139,038 ) Cash, cash equivalents, and restricted cash—Beginning of Period 67,629 254,985 8,377 — 330,991 Cash, cash equivalents, and restricted cash—End of Period $ 57,405 $ 126,861 $ 7,687 $ — $ 191,953 Condensed Consolidating Statements of Cash Flows Year Ended December 31, 2016 Parent Issuer / Subsidiary Non-Guarantor Eliminations Consolidated (in thousands) Net Cash Provided By (Used In) Operating Activities: $ (4,954 ) $ 440,203 $ 1,795 $ — $ 437,044 Cash Flows From Investing Activities: Net payments to affiliates — (28,927 ) — 28,927 — Additions to property and equipment, including pre-delivery deposits — (165,710 ) (13,128 ) — (178,838 ) Proceeds from purchase assignment and leaseback transactions — 31,851 — — 31,851 Net proceeds from disposition of equipment — 15 1 — 16 Purchases of investments — (260,987 ) — — (260,987 ) Sales of investments — 253,855 — — 253,855 Net cash provided by (used in) investing activities — (169,903 ) (13,127 ) 28,927 (154,103 ) Cash Flows From Financing Activities: Repayments of long-term debt and capital lease obligations — (214,025 ) — — (214,025 ) Repurchases and conversion of convertible notes (1,426 ) — — — (1,426 ) Repurchases of common stock (13,763 ) — — — (13,763 ) Debt issuance costs — (1,653 ) — — (1,653 ) Net payments from affiliates 17,894 — 11,033 (28,927 ) — Other 458 (8,043 ) — — (7,585 ) Net cash provided by (used in) financing activities 3,163 (223,721 ) 11,033 (28,927 ) (238,452 ) Net increase (decrease) in cash and cash equivalents (1,791 ) 46,579 (299 ) — 44,489 Cash, cash equivalents, and restricted cash—Beginning of Period 69,420 208,406 8,676 — 286,502 Cash, cash equivalents, and restricted cash—End of Period $ 67,629 $ 254,985 $ 8,377 $ — $ 330,991

Supplemental Financial Inform_2

Supplemental Financial Information (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Schedule of Selected Quarterly Financial Data	Unaudited Quarterly Financial Information: First Second Third Fourth (in thousands, except per share data) 2018: Operating revenue $ 665,412 $ 715,447 $ 759,087 $ 697,465 Operating income 36,265 92,928 115,826 69,349 Nonoperating income (loss) 830 12,859 931 (27,830 ) Net income 28,542 79,480 93,542 ** 31,636 ** Net Income Per Common Stock Share: Basic $ 0.56 $ 1.57 $ 1.85 $ 0.65 Diluted 0.56 1.56 1.84 0.64 2017: (a) Operating revenue $ 606,209 $ 670,116 $ 716,216 $ 682,604 Operating income 62,030 136,840 169,002 96,166 Nonoperating income (loss) (15,813 ) (13,191 ) (54,113 ) 9,899 * Net income 33,645 76,894 71,622 148,448 ** Net Income Per Common Stock Share: Basic $ 0.63 $ 1.43 $ 1.35 $ 2.86 Diluted 0.62 1.43 1.34 2.84 (a) Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers . See Note 1 to Consolidated Financial Statements for additional information. * During the fourth quarter of 2017, the Company recorded a $4.6 million reduction in its OPEB settlement related to the third quarter of 2017 revising the settlement from $15.0 million to $10.4 million . ** Amounts reflect the impact of the Tax Act enacted in 2017. See Note 10 for further discussion.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Expenses (Details)	12 Months Ended
	Dec. 31, 2018USD ($)group	Dec. 31, 2017USD ($)		Dec. 31, 2016USD ($)
Property, Equipment and Depreciation
Accumulated amortization for aircraft and other capital leases	$ 90,500,000	$ 70,900,000
Net book value	2,185,111,000	1,842,263,000	[1]
Value of construction in progress	47,300,000	135,300,000
Aircraft Maintenance and Repair Costs
Additional cost of repairing engines	$ 0
Number of groups in which maintenance deposits bifurcated | group	2
Impairment of Long-Lived Assets and Finite-lived Intangible Assets
Impairment charge in connection with its owned B767 fleet and related assets	$ 0	0	[2]	$ 49,361,000	[2]
Operating Leases
Rental expense for operating leases	201,100,000	208,000,000		193,000,000
Cost of Goods and Services Sold [Abstract]
Costs to obtain or fulfill a contract	16,300,000	16,700,000
Advertising Costs
Advertising expense	19,300,000	16,600,000		18,300,000
B-767 fleet and related assets
Impairment of Long-Lived Assets and Finite-lived Intangible Assets
Impairment charge in connection with its owned B767 fleet and related assets	$ 0	0		49,361,000
Boeing 717-200 aircraft and engines | Minimum
Property, Equipment and Depreciation
Estimated useful lives	7 years
Residual value	7.00%
Boeing 717-200 aircraft and engines | Maximum
Property, Equipment and Depreciation
Estimated useful lives	11 years
Residual value	34.00%
Airbus A330-200 aircraft and engines
Property, Equipment and Depreciation
Estimated useful lives	25 years
Residual value	10.00%
Airbus A321neo aircraft and engines
Property, Equipment and Depreciation
Estimated useful lives	25 years
Residual value	10.00%
ATR turboprop aircraft and engines
Property, Equipment and Depreciation
Estimated useful lives	10 years
Residual value	15.00%
Major rotable parts | Minimum
Property, Equipment and Depreciation
Residual value	10.00%
Major rotable parts | Maximum
Property, Equipment and Depreciation
Residual value	15.00%
Furniture, fixtures and other equipment
Property, Equipment and Depreciation
Residual value	0.00%
Furniture, fixtures and other equipment | Minimum
Property, Equipment and Depreciation
Estimated useful lives	3 years
Furniture, fixtures and other equipment | Maximum
Property, Equipment and Depreciation
Estimated useful lives	7 years
Capitalized software
Property, Equipment and Depreciation
Residual value	0.00%
Net book value	$ 27,900,000	34,600,000
Amortization expense	$ 14,600,000	12,300,000		9,700,000
Capitalized software | Minimum
Property, Equipment and Depreciation
Estimated useful lives	3 years
Capitalized software | Maximum
Property, Equipment and Depreciation
Estimated useful lives	7 years
Power-by-hour Vendors
Aircraft Maintenance and Repair Costs
Prepaid expense, noncurrent	$ 95,000,000	109,300,000
Prepaid expense, recovery period	4 years
Fulfillment Services [Member]
Cost of Goods and Services Sold [Abstract]
Expenses related to costs to obtain or fulfill a contract	$ 96,000,000	$ 95,500,000		$ 94,300,000
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Revenue Recognition Narrative (Details) $ in Thousands

3 Months Ended

12 Months Ended

Dec. 31, 2018USD ($)

Sep. 30, 2018USD ($)

Jun. 30, 2018USD ($)

Mar. 31, 2018USD ($)

Dec. 31, 2017USD ($)

Sep. 30, 2017USD ($)

[1]

Jun. 30, 2017USD ($)

[1]

Mar. 31, 2017USD ($)

[1]

Dec. 31, 2018USD ($)segmentbusiness

Dec. 31, 2017USD ($)

Dec. 31, 2016USD ($)

Disaggregation of Revenue [Line Items]

Number of significant lines of business offered by company | business

1

Number of reportable segments | segment

1

Total operating revenue

$ 697,465

$ 759,087

$ 715,447

$ 665,412

$ 682,604

[1]

$ 716,216

$ 670,116

$ 606,209

$ 2,837,411

$ 2,675,145

[2]

$ 2,432,413

[2]

Expected timing of satisfaction for future revenue

future revenue that is expected to be realized over the next 12 months

Passenger revenue, excluding frequent flyer

Disaggregation of Revenue [Line Items]

Total operating revenue

$ 2,454,811

2,351,062

2,146,258

Air traffic liability, as it relates to passenger tickets

$ 427,800

$ 421,600

427,800

421,600

Air traffic liability, revenue recognized

421,000

363,900

328,700

Frequent flyer revenue, transportation component

Disaggregation of Revenue [Line Items]

Total operating revenue

$ 147,982

$ 135,765

$ 125,429

Weighted average ETV, period

12 months

Period of member inactivity before expiration of miles

18 months

[1]

Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

[2]

Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Summary of Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017		Sep. 30, 2017	[1]	Jun. 30, 2017	[1]	Mar. 31, 2017	[1]	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Total operating revenue	$ 697,465	$ 759,087	$ 715,447	$ 665,412	$ 682,604	[1]	$ 716,216		$ 670,116		$ 606,209		$ 2,837,411	$ 2,675,145	[2]	$ 2,432,413	[2]
Air traffic liability and current frequent flyer deferred revenue	603,736				589,093	[3]							603,736	589,093	[3]
Noncurrent frequent flyer deferred revenue	163,619				149,764	[3]							163,619	149,764	[3]
Domestic
Disaggregation of Revenue [Line Items]
Total operating revenue													2,071,861	1,976,971		1,874,039
Pacific
Disaggregation of Revenue [Line Items]
Total operating revenue													765,550	698,174		558,374
Passenger revenue, excluding frequent flyer
Disaggregation of Revenue [Line Items]
Total operating revenue													2,454,811	2,351,062		2,146,258
Total frequent flyer liability	427,800				421,600								427,800	421,600
Frequent flyer revenue, transportation component
Disaggregation of Revenue [Line Items]
Total operating revenue													147,982	135,765		125,429
Passenger Revenue
Disaggregation of Revenue [Line Items]
Total operating revenue													2,602,793	2,486,827	[2]	2,271,687	[2]
Other revenue (e.g. cargo and other miscellaneous)
Disaggregation of Revenue [Line Items]
Total operating revenue													163,140	142,172		115,379
Frequent flyer revenue, marketing and brand component
Disaggregation of Revenue [Line Items]
Total operating revenue													71,478	46,146		45,347
Other Revenue
Disaggregation of Revenue [Line Items]
Total operating revenue													234,618	188,318	[2]	$ 160,726	[2]
Frequent Flyer Revenue
Disaggregation of Revenue [Line Items]
Air traffic liability and current frequent flyer deferred revenue	168,570				161,757								168,570	161,757
Noncurrent frequent flyer deferred revenue	163,619				149,764								163,619	149,764
Total frequent flyer liability	$ 332,189				$ 311,521								$ 332,189	$ 311,521
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[3]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Recently Adopted and Issued Accounting Pronouncements (Details) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2018USD ($)$ / shares	Sep. 30, 2018USD ($)$ / shares	Jun. 30, 2018USD ($)$ / shares	Mar. 31, 2018USD ($)$ / shares	Dec. 31, 2017USD ($)$ / shares		Sep. 30, 2017USD ($)$ / shares	[1]	Jun. 30, 2017USD ($)$ / shares	[1]	Mar. 31, 2017USD ($)$ / shares	[1]	Dec. 31, 2018USD ($)$ / shares	Dec. 31, 2017USD ($)$ / shares		Dec. 31, 2016USD ($)$ / shares		Dec. 31, 2018aircraft	Dec. 31, 2018engine	Dec. 31, 2018USD ($)	Dec. 31, 2018contract
Operating Revenue:
Total operating revenue	$ 697,465	$ 759,087	$ 715,447	$ 665,412	$ 682,604	[1]	$ 716,216		$ 670,116		$ 606,209		$ 2,837,411	$ 2,675,145	[2]	$ 2,432,413	[2]
Operating Expenses													2,523,043	2,211,107	[2]	2,034,926	[2]
Operating Income	69,349	115,826	92,928	36,265	96,166	[1]	169,002		136,840		62,030		314,368	464,038	[2]	397,487	[2]
Nonoperating Income (Expense)	$ (27,830)	$ 931	$ 12,859	$ 830	$ 9,899	[1]	$ (54,113)		$ (13,191)		$ (15,813)		(13,210)	(73,217)	[2]	(36,268)	[2]
Income tax expense													$ 67,958	60,211	[2]	137,099	[2]
Net Income														$ 330,610		$ 224,120
Basic (in dollars per share) | $ / shares	$ 0.65	$ 1.85	$ 1.57	$ 0.56	$ 2.86	[1]	$ 1.35		$ 1.43		$ 0.63		$ 4.63	$ 6.23	[2]	$ 4.19	[2]
Diluted (in dollars per share) | $ / shares	$ 0.64	$ 1.84	$ 1.56	$ 0.56	$ 2.84	[1]	$ 1.34		$ 1.43		$ 0.62		$ 4.62	$ 6.19	[2]	$ 4.15	[2]
ASSETS
Prepaid expenses and other					$ 79,186	[3]								$ 79,186	[3]					$ 58,573
Current Liabilities:
Air traffic liability and current frequent flyer deferred revenue					589,093	[3]								589,093	[3]					603,736
Other accrued liabilities					147,593	[3]								147,593	[3]					158,154
Noncurrent Liabilities:
Other liabilities and deferred credits					75,841	[3]								75,841	[3]					119,826
Noncurrent frequent flyer deferred revenue					149,764	[3]								149,764	[3]					163,619
Deferred tax liability					134,141	[3]								134,141	[3]					167,770
Shareholders' Equity:
Accumulated income					793,134	[3]								793,134	[3]					912,201
Number of aircraft treated as an operating lease																		17			17
Number of spare engines treated as operating lease | engine																			5
Build-to-suit lease liability																				73,000
Passenger revenue, excluding frequent flyer
Operating Revenue:
Total operating revenue													$ 2,454,811	2,351,062		$ 2,146,258
Frequent flyer revenue, transportation component
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue recognition period	23 months												23 months
Operating Revenue:
Total operating revenue													$ 147,982	135,765		125,429
Passenger
Operating Revenue:
Total operating revenue													2,602,793	2,486,827	[2]	2,271,687	[2]
Other revenue (e.g. cargo and other miscellaneous)
Operating Revenue:
Total operating revenue													163,140	142,172		115,379
Frequent flyer revenue, marketing and brand component
Operating Revenue:
Total operating revenue													71,478	46,146		45,347
Other Revenue
Operating Revenue:
Total operating revenue													234,618	188,318	[2]	160,726	[2]
Air traffic liability
Current Liabilities:
Air traffic liability and current frequent flyer deferred revenue					589,093									589,093
As Previously Reported
Operating Revenue:
Total operating revenue														2,695,628		2,450,580
Operating Expenses														2,211,856		2,034,848
Operating Income														483,772		415,732
Nonoperating Income (Expense)														(73,217)		(36,268)
Income tax expense														46,514		144,032
Net Income														$ 364,041		$ 235,432
Basic (in dollars per share) | $ / shares														$ 6.86		$ 4.40
Diluted (in dollars per share) | $ / shares														$ 6.82		$ 4.36
ASSETS
Prepaid expenses and other					65,196									$ 65,196
Current Liabilities:
Other accrued liabilities					146,283									146,283
Noncurrent Liabilities:
Other liabilities and deferred credits					95,636									95,636
Noncurrent frequent flyer deferred revenue					0									0
Deferred tax liability					174,344									174,344
Shareholders' Equity:
Accumulated income					913,951									913,951
As Previously Reported | Passenger
Operating Revenue:
Total operating revenue														2,362,076		$ 2,145,742
As Previously Reported | Other Revenue
Operating Revenue:
Total operating revenue														333,552		304,838
As Previously Reported | Air traffic liability
Current Liabilities:
Air traffic liability and current frequent flyer deferred revenue					545,362									545,362
Adjustments | Accounting Standards Update 2014-09
Operating Revenue:
Total operating revenue														(20,483)		(18,167)
Operating Expenses														(749)		78
Operating Income														(19,734)		(18,245)
Nonoperating Income (Expense)														0		0
Income tax expense														13,697		(6,933)
Net Income														$ (33,431)		$ (11,312)
Basic (in dollars per share) | $ / shares														$ (0.63)		$ (0.21)
Diluted (in dollars per share) | $ / shares														$ (0.63)		$ (0.21)
ASSETS
Prepaid expenses and other					13,990									$ 13,990
Current Liabilities:
Other accrued liabilities					1,310									1,310
Noncurrent Liabilities:
Other liabilities and deferred credits					(19,795)									(19,795)
Noncurrent frequent flyer deferred revenue					149,764									149,764
Deferred tax liability					(40,203)									(40,203)
Shareholders' Equity:
Accumulated income					(120,817)									(120,817)
Adjustments | Passenger | Accounting Standards Update 2014-09
Operating Revenue:
Total operating revenue														124,751		$ 125,945
Adjustments | Other Revenue | Accounting Standards Update 2014-09
Operating Revenue:
Total operating revenue														(145,234)		$ (144,112)
Adjustments | Air traffic liability | Accounting Standards Update 2014-09
Current Liabilities:
Air traffic liability and current frequent flyer deferred revenue					$ 43,731									$ 43,731
Minimum
Shareholders' Equity:
Estimated impact of net present value of future rental payments																				550,000
Maximum
Shareholders' Equity:
Estimated impact of net present value of future rental payments																				$ 650,000
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impact to equity													12,500
Accumulated Other Comprehensive Income
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impact to equity													$ (12,500)
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[3]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	[1]	Sep. 30, 2017	[1]	Jun. 30, 2017	[1]	Mar. 31, 2017	[1]	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Amounts reclassified from AOCI
Revenue	$ (697,465)	$ (759,087)	$ (715,447)	$ (665,412)	$ (682,604)		$ (716,216)		$ (670,116)		$ (606,209)		$ (2,837,411)	$ (2,675,145)	[2]	$ (2,432,413)	[2]
Nonoperating Income (Expense), Other, net													2,103	(2,101)	[2]	(4,323)	[2]
Other nonoperating special items													0	(45,585)	[2]	0	[2]
Total before tax													(301,158)	(390,821)	[2]	(361,219)	[2]
Income tax expense (benefit)													67,958	60,211	[2]	137,099	[2]
Total, net of tax														(330,610)		(224,120)
Net Income	$ (31,636)	$ (93,542)	$ (79,480)	$ (28,542)	$ (148,448)		$ (71,622)		$ (76,894)		$ (33,645)		(233,200)	(330,610)	[2],[3],[4]	(224,120)	[2],[3],[4]
Amount reclassified from accumulated other comprehensive loss
Amounts reclassified from AOCI
Net Income													1,302	31,607		5,544
Derivatives designated as hedging instruments under ASC 815 | Amount reclassified from accumulated other comprehensive loss
Amounts reclassified from AOCI
Total before tax													(1,380)	(2,391)		1,140
Income tax expense (benefit)													339	906		(438)
Total, net of tax													(1,041)	(1,485)		702
Derivatives designated as hedging instruments under ASC 815 | Amount reclassified from accumulated other comprehensive loss | Interest rate derivative losses, net
Amounts reclassified from AOCI
Interest expense													0	0		944
Actuarial loss | Amount reclassified from accumulated other comprehensive loss
Amounts reclassified from AOCI
Nonoperating Income (Expense), Other, net													2,708	8,792		7,730
Prior service cost | Amount reclassified from accumulated other comprehensive loss
Amounts reclassified from AOCI
Nonoperating Income (Expense), Other, net													225	254		227
Partial settlement and curtailment loss | Amount reclassified from accumulated other comprehensive loss
Amounts reclassified from AOCI
Other nonoperating special items													0	10,384		0
Loss on plan termination | Amount reclassified from accumulated other comprehensive loss
Amounts reclassified from AOCI
Other nonoperating special items													0	35,201		0
Amortization of defined benefit pension items | Amount reclassified from accumulated other comprehensive loss
Amounts reclassified from AOCI
Total before tax													2,933	54,631		7,957
Income tax expense (benefit)													(671)	(21,519)		(3,048)
Total, net of tax													2,262	33,112		4,909
Short-term investments | Amount reclassified from accumulated other comprehensive loss
Amounts reclassified from AOCI
Nonoperating Income (Expense), Other, net													107	(32)		(108)
Total before tax													107	(32)		(108)
Income tax expense (benefit)													(26)	12		41
Total, net of tax													81	(20)		(67)
Passenger
Amounts reclassified from AOCI
Revenue													(2,602,793)	(2,486,827)	[2]	(2,271,687)	[2]
Passenger | Derivatives designated as hedging instruments under ASC 815 | Amount reclassified from accumulated other comprehensive loss | Foreign currency derivative (gains) losses, net
Amounts reclassified from AOCI
Revenue													$ (1,380)	$ (2,391)		$ 196
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[3]	Amounts adjusted for the adoption of ASC No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[4]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Loss - Roll forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Roll forward of accumulated other comprehensive income (loss)
Beginning balance	$ 845,125	[1]	$ 593,067		$ 446,062
Reclassification of stranded tax effects	(12,510)
Other comprehensive income (loss) before reclassifications, net of tax	(6,668)		(3,378)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	1,302		31,607
Total Other Comprehensive Income (Loss)	(5,366)		28,229	[2]	(4,216)	[2]
Ending balance	947,994		845,125	[1]	593,067
Derivatives
Roll forward of accumulated other comprehensive income (loss)
Beginning balance	1,249
Reclassification of stranded tax effects	269
Other comprehensive income (loss) before reclassifications, net of tax	2,840
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	(1,041)
Total Other Comprehensive Income (Loss)	1,799
Ending balance	3,317		1,249
Defined Benefit Pension Items
Roll forward of accumulated other comprehensive income (loss)
Beginning balance	(75,953)		(110,202)
Reclassification of stranded tax effects	(12,659)
Other comprehensive income (loss) before reclassifications, net of tax	(9,505)		1,137
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	2,262		33,112
Total Other Comprehensive Income (Loss)	(7,243)		34,249
Ending balance	(95,855)		(75,953)		(110,202)
Short-term investments
Roll forward of accumulated other comprehensive income (loss)
Beginning balance	(560)		(362)
Reclassification of stranded tax effects	(120)
Other comprehensive income (loss) before reclassifications, net of tax	(3)		(178)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	81		(20)
Total Other Comprehensive Income (Loss)	78		(198)
Ending balance	(602)		(560)		(362)
Total
Roll forward of accumulated other comprehensive income (loss)
Beginning balance	(75,264)		(103,493)		(99,277)
Total Other Comprehensive Income (Loss)	(5,366)		28,229		(4,216)
Ending balance	(93,140)		(75,264)		(103,493)
Foreign Currency Derivatives | Derivatives
Roll forward of accumulated other comprehensive income (loss)
Beginning balance	$ 1,249		7,071
Other comprehensive income (loss) before reclassifications, net of tax			(4,337)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax			(1,485)
Total Other Comprehensive Income (Loss)			(5,822)
Ending balance			$ 1,249		$ 7,071
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of ASC No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Earnings Per Share - Potential

Earnings Per Share - Potential Dilution (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	[1]	Sep. 30, 2017	[1]	Jun. 30, 2017	[1]	Mar. 31, 2017	[1]	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Numerator:
Net Income	$ 31,636	$ 93,542	$ 79,480	$ 28,542	$ 148,448		$ 71,622		$ 76,894		$ 33,645		$ 233,200	$ 330,610	[2],[3],[4]	$ 224,120	[2],[3],[4]
Denominator:
Weighted average common shares outstanding—Basic (in shares)													50,338	53,074	[3]	53,502	[3]
Assumed exercise of stock options and awards (in shares)													150	339		450
Assumed exercise of convertible note premium (in shares)													0	0		6
Weighted average common shares outstanding—Diluted (in shares)													50,488	53,413	[3]	53,958	[3]
Net Income Per Common Stock Share:
Basic (in dollars per share)	$ 0.65	$ 1.85	$ 1.57	$ 0.56	$ 2.86		$ 1.35		$ 1.43		$ 0.63		$ 4.63	$ 6.23	[3]	$ 4.19	[3]
Diluted (in dollars per share)	$ 0.64	$ 1.84	$ 1.56	$ 0.56	$ 2.84		$ 1.34		$ 1.43		$ 0.62		$ 4.62	$ 6.19	[3]	$ 4.15	[3]
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of ASC No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[3]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[4]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Short-Term Investments (Details

Short-Term Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Short-term Investments
Amortized Cost	$ 232,997	$ 270,154
Gross Unrealized Gains	54	10
Gross Unrealized Losses	(810)	(867)
Fair Value
Under 1 Year	142,399
1 to 5 Years	89,842
Total	232,241	269,297
Corporate debt
Short-term Investments
Amortized Cost	142,748	165,610
Gross Unrealized Gains	49	8
Gross Unrealized Losses	(695)	(535)
Fair Value
Under 1 Year	69,957
1 to 5 Years	72,145
Total	142,102	165,083
U.S. government and agency debt
Short-term Investments
Amortized Cost	37,163	59,054
Gross Unrealized Gains	3	1
Gross Unrealized Losses	(59)	(215)
Fair Value
Under 1 Year	28,164
1 to 5 Years	8,943
Total	37,107	58,840
Municipal bonds
Short-term Investments
Amortized Cost	9,903	21,517
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(32)	(104)
Fair Value
Under 1 Year	8,288
1 to 5 Years	1,583
Total	9,871	21,413
Other fixed income securities
Short-term Investments
Amortized Cost	43,183	23,973
Gross Unrealized Gains	2	1
Gross Unrealized Losses	(24)	(13)
Fair Value
Under 1 Year	35,990
1 to 5 Years	7,171
Total	$ 43,161	$ 23,961

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets measured at fair value
Short-term investments	$ 232,241	$ 269,297	[1]
Recurring basis
Assets measured at fair value
Cash equivalents	121,154	62,310
Restricted cash	0	1,000
Short-term investments	232,241	269,297
Total assets measured at fair value	359,546	357,515
Liabilities measured at fair value
Total liabilities measured at fair value	1,347	1,713
Recurring basis | Crude oil call options
Assets measured at fair value
Fuel derivative contracts	1,572	20,272
Recurring basis | Jet fuel swaps
Assets measured at fair value
Fuel derivative contracts		336
Recurring basis | Foreign Currency Derivatives
Assets measured at fair value
Fuel derivative contracts	4,579	4,300
Liabilities measured at fair value
Derivative contracts	1,347	1,713
Recurring basis | Level 1
Assets measured at fair value
Cash equivalents	42,175	27,807
Restricted cash	0	1,000
Short-term investments	0	0
Total assets measured at fair value	42,175	28,807
Liabilities measured at fair value
Total liabilities measured at fair value	0	0
Recurring basis | Level 1 | Crude oil call options
Assets measured at fair value
Fuel derivative contracts	0	0
Recurring basis | Level 1 | Jet fuel swaps
Assets measured at fair value
Fuel derivative contracts		0
Recurring basis | Level 1 | Foreign Currency Derivatives
Assets measured at fair value
Fuel derivative contracts	0	0
Liabilities measured at fair value
Derivative contracts	0	0
Recurring basis | Level 2
Assets measured at fair value
Cash equivalents	78,979	34,503
Restricted cash	0	0
Short-term investments	232,241	269,297
Total assets measured at fair value	317,371	328,708
Liabilities measured at fair value
Total liabilities measured at fair value	1,347	1,713
Recurring basis | Level 2 | Crude oil call options
Assets measured at fair value
Fuel derivative contracts	1,572	20,272
Recurring basis | Level 2 | Jet fuel swaps
Assets measured at fair value
Fuel derivative contracts		336
Recurring basis | Level 2 | Foreign Currency Derivatives
Assets measured at fair value
Fuel derivative contracts	4,579	4,300
Liabilities measured at fair value
Derivative contracts	1,347	1,713
Recurring basis | Level 3
Assets measured at fair value
Cash equivalents	0	0
Restricted cash	0	0
Short-term investments	0	0
Total assets measured at fair value	0	0
Liabilities measured at fair value
Total liabilities measured at fair value	0	0
Recurring basis | Level 3 | Crude oil call options
Assets measured at fair value
Fuel derivative contracts	0	0
Recurring basis | Level 3 | Jet fuel swaps
Assets measured at fair value
Fuel derivative contracts		0
Recurring basis | Level 3 | Foreign Currency Derivatives
Assets measured at fair value
Fuel derivative contracts	0	0
Liabilities measured at fair value
Derivative contracts	$ 0	$ 0
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Fair Value Measurements - Debt

Fair Value Measurements - Debt Measured at Fair Value (Excluding Obligations Under Capital Leases and Financing Obligations) (Details) - Recurring basis - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value Measurements
Carrying Amount	$ 467,760	$ 433,072
Fair Value	461,805	444,099
Level 1
Fair Value Measurements
Fair Value	0	0
Level 2
Fair Value Measurements
Fair Value	0	0
Level 3
Fair Value Measurements
Fair Value	$ 461,805	$ 444,099

Financial Derivative Instrume_3

Financial Derivative Instruments - Realized and Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Derivative instrument
Gains on fuel derivatives recorded as Nonoperating income (expense)	$ 5,590	$ 3,312	[1]	$ 20,106	[1]
Derivatives not designated as hedges | Fuel derivative contracts
Derivative instrument
Gains (losses) realized at settlement	25,563	(534)		(27,572)
Prior period unrealized amounts	(11,792)	(7,946)		39,731
Unrealized gains (losses) that will settle in future periods	(8,181)	11,792		7,947
Gains on fuel derivatives recorded as Nonoperating income (expense)	5,590	$ 3,312		$ 20,106
Derivatives designated as hedges | Foreign Currency Derivatives
Derivative instrument
Expected reclassification of net gain	$ 3,900
Reclassification estimated time period	12 months
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Financial Derivative Instrume_4

Financial Derivative Instruments - Derivative Positions (Details) ¥ in Thousands, gal in Thousands, $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)gal	Dec. 31, 2017USD ($)gal	Dec. 31, 2018JPY (¥)	Dec. 31, 2018AUD ($)	Dec. 31, 2017JPY (¥)	Dec. 31, 2017AUD ($)
Fair Value of Derivatives
Net derivative position	$ 4,800	$ (23,200)
Derivatives designated as hedges | Foreign Currency Derivatives | Prepaid expenses and other
Fair Value of Derivatives
Notional Amount			¥ 15,933,550	$ 48,709	¥ 16,732,375	$ 47,805
Gross fair value of assets, current	3,922	3,737
Gross fair value of (liabilities), current	(915)	(1,441)
Net derivative position	3,007	2,296
Derivatives designated as hedges | Foreign Currency Derivatives | Long-term prepayments and other
Fair Value of Derivatives
Notional Amount			4,491,350	9,419	4,666,700	9,180
Gross fair value of assets, noncurrent	633	546
Gross fair value of (liabilities), noncurrent	(292)	(195)
Net derivative position	341	351
Derivatives not designated as hedges | Foreign Currency Derivatives | Prepaid expenses and other
Fair Value of Derivatives
Gross fair value of assets, current		17
Gross fair value of (liabilities), current		(77)
Net derivative position		$ (60)
Derivatives not designated as hedges | Foreign Currency Derivatives | Other accrued liabilities
Fair Value of Derivatives
Notional Amount			¥ 832,900	$ 2,785	¥ 866,150	$ 3,148
Gross fair value of assets, current	24
Gross fair value of (liabilities), current	(140)
Net derivative position	$ (116)
Derivatives not designated as hedges | Fuel derivative contracts | Prepaid expenses and other
Fair Value of Derivatives
Notional Amount (volume) | gal	95,256	94,332
Gross fair value of assets, current	$ 1,572	$ 20,608
Gross fair value of (liabilities), current	0	0
Net derivative position	$ 1,572	$ 20,608

Financial Derivative Instrume_5

Financial Derivative Instruments - Impact of Cash Flow Hedges; Risk and Collateral (Details) - Cash Flow Hedging - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Foreign Currency Derivatives
Gains (losses) for designated hedge contracts
(Gain) Loss recognized in AOCI on derivatives (effective portion)	$ (3,766)	$ 6,983	$ (3,350)
(Gain) Loss reclassified from AOCI into income (effective portion)	(1,380)	(2,391)	196
Gain recognized in nonoperating (income) expense (ineffective portion)	0	0	0
Interest Rate Derivative
Gains (losses) for designated hedge contracts
(Gain) Loss recognized in AOCI on derivatives (effective portion)	0	0	923
(Gain) Loss reclassified from AOCI into income (effective portion)	0	0	944
Gain recognized in nonoperating (income) expense (ineffective portion)	$ 0	$ 0	$ 0

Financial Derivative Instrume_6

Financial Derivative Instruments - Risk and Collateral (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net derivative position	$ 4,800,000	$ (23,200,000)
Collateral posted with counterparties	$ 0	$ 0

Intangible Assets - Net Book Va

Intangible Assets - Net Book Value and Useful Lives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016	[2]
Intangible Assets
Trade name	$ 13,500	$ 13,500
Total intangible assets	23,628	23,628
Accumulated amortization	(9,479)	(8,441)
Total intangible assets	14,149	15,187	[1]
Amortization of intangible assets	1,038	1,224	[2]	$ 2,322
Estimated future amortization expense	600
Favorable aircraft maintenance contracts
Intangible Assets
Gross carrying value	8,740	8,740
Accumulated amortization	(8,284)	(7,708)
Net book value	$ 456	$ 1,032
Favorable aircraft maintenance contracts | Weighted average
Intangible Assets
Approximate useful life	14 years	14 years
Other
Intangible Assets
Gross carrying value	$ 1,388	$ 1,388
Accumulated amortization	(1,195)	(733)
Net book value	$ 193	$ 655
Approximate useful life	3 years	3 years
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Debt - Schedule of Debt (Detail

Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total debt, capital, and financing lease obligations	$ 720,277	$ 582,112
Less: Unamortized debt discount and debt issuance costs	(10,496)	(11,441)
Less: Current maturities	(101,097)	(59,470)	[1]
Long-term debt and capital lease obligations	608,684	511,201	[1]
Enhanced Equipment Trust Certificates (EETC) | A330-200 aircraft | Class A Pass-Through Trust
Debt Instrument [Line Items]
Total debt, capital, and financing lease obligations	$ 245,845	263,864
Stated interest rate	3.90%
Enhanced Equipment Trust Certificates (EETC) | A330-200 aircraft | Class B Pass-Through trust
Debt Instrument [Line Items]
Total debt, capital, and financing lease obligations	$ 88,608	94,580
Stated interest rate	4.95%
Aircraft Facility Agreement | Boeing 717-200
Debt Instrument [Line Items]
Total debt, capital, and financing lease obligations	$ 50,376	74,629
Stated interest rate	8.00%
Japanese Yen Denominated Debt, Due May 2030
Debt Instrument [Line Items]
Total debt, capital, and financing lease obligations	$ 42,116	0
Stated interest rate	1.05%
Japanese Yen Denominated Debt, Due June 2030
Debt Instrument [Line Items]
Total debt, capital, and financing lease obligations	$ 40,815	0
Stated interest rate	1.01%
Capital Lease Obligations
Debt Instrument [Line Items]
Total debt, capital, and financing lease obligations	$ 252,517	$ 149,039
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Debt - Enhanced Equipment Trust

Debt - Enhanced Equipment Trust Certificates (EETC) (Details)	12 Months Ended
	Dec. 31, 2013airbus_aircraftpass_through_trust
Debt Instrument [Line Items]
Number of pass-through trusts | pass_through_trust	2
Enhanced Equipment Trust Certificates (EETC)
Debt Instrument [Line Items]
Number of aircraft financed through notes issued | airbus_aircraft	6

Debt - Foreign Denominated Fina

Debt - Foreign Denominated Financing (Details) $ in Thousands, ¥ in Billions	12 Months Ended
	Dec. 31, 2018USD ($)agreement	Dec. 31, 2017USD ($)	[1]	Dec. 31, 2016USD ($)	[1]	Dec. 31, 2018JPY (¥)
Debt Instrument [Line Items]
Foreign currency unrealized gains | $	$ 380	$ 0		$ 0
Secured Debt | Japanese Yen Denominated Debt
Debt Instrument [Line Items]
Number of debt agreements | agreement	2
Principal amount issued	$ 86,500					¥ 9.6
Debt, duration of loan	12 years
Minimum | Secured Debt | Japanese Yen Denominated Debt
Debt Instrument [Line Items]
Debt, fixed installment coupon rate	1.01%					1.01%
Maximum | Secured Debt | Japanese Yen Denominated Debt
Debt Instrument [Line Items]
Debt, fixed installment coupon rate	1.05%					1.05%
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Debt - Debt Extinguishment (Det

Debt - Debt Extinguishment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Extinguishment of Debt [Line Items]
Extinguished amount of existing debt	$ 0	$ 0
Loss on extinguishment of debt	$ 0	$ 0	[1],[2]	$ 10,473,000	[1],[2]
Secured Debt
Extinguishment of Debt [Line Items]
Extinguished amount of existing debt				140,500,000
Loss on extinguishment of debt				$ 10,000,000
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Debt - Revolving Credit Facilit

Debt - Revolving Credit Facility (Details) - Revolving Credit Facility - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Line of Credit Facility [Line Items]
Outstanding borrowing	$ 0
Citigroup Global Markets, Inc.
Line of Credit Facility [Line Items]
Maximum amount of revolving credit	$ 235,000,000	$ 225,000,000
Renewal option, period	12 months
Accumulated amortization, due to debt agreement	$ 600,000
Debt issuance costs	$ 2,000,000
London Interbank Offered Rate (LIBOR) | Citigroup Global Markets, Inc.
Line of Credit Facility [Line Items]
Stated interest rate		2.00%
Certain Market Rates | Citigroup Global Markets, Inc.
Line of Credit Facility [Line Items]
Stated interest rate		1.00%

Debt - Schedule of Maturities o

Debt - Schedule of Maturities of Long-Term Debt (Details) $ in Thousands	Dec. 31, 2018USD ($)
Debt Disclosure [Abstract]
2,019	$ 81,075
2,020	29,597
2,021	56,557
2,022	63,665
2,023	28,466
Thereafter	208,400
Total long-term debt	$ 467,760

Leases (Details)

Leases (Details) - 12 months ended Dec. 31, 2018 $ in Thousands	aircraft	USD ($)	contract
Leases [Abstract]
Number of lease contracts for aircraft | contract			22
Number of aircraft | aircraft	66
Number of aircraft lease contracts accounted for as capital leases | contract			5
Number of aircraft lease contracts accounted for as operating leases	17		17
Aircraft
Future minimum rental payments under capital and financing leases
2,019		$ 24,850
2,020		24,850
2,021		24,850
2,022		24,705
2,023		21,370
Thereafter		75,891
Total minimum capital lease payments		196,516
Less amounts representing interest		(35,502)
Present value of minimum capital & financing lease payments		161,014
Future minimum rental payments under operating leases
2,019		106,448
2,020		90,417
2,021		74,315
2,022		68,208
2,023		59,925
Thereafter		159,271
Total minimum operating lease payments		558,584
Other Lease
Future minimum rental payments under capital and financing leases
2,019		7,909
2,020		5,908
2,021		4,630
2,022		4,870
2,023		8,207
Thereafter		111,651
Total minimum capital lease payments		143,175
Less amounts representing interest		(51,672)
Present value of minimum capital & financing lease payments		91,503
Future minimum rental payments under operating leases
2,019		5,730
2,020		5,709
2,021		5,846
2,022		5,930
2,023		5,975
Thereafter		89,699
Total minimum operating lease payments		$ 118,889
Minimum
Operating Leased Assets [Line Items]
Remaining lease terms	1 year
Maximum
Operating Leased Assets [Line Items]
Remaining lease terms	10 years

Leases - Maintenance Hangar (De

Leases - Maintenance Hangar (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended
	Nov. 30, 2016	Jan. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Capital Leased Assets [Line Items]
Recognized lease asset			$ 2,848,572	$ 2,400,811	[1]
Cargo and maintenance hangar
Capital Leased Assets [Line Items]
Lease term	35 years
Assets
Capital Leased Assets [Line Items]
Property, plant and equipment, additions		$ 33,300
Asset under construction
Capital Leased Assets [Line Items]
Property, plant and equipment, additions	$ 73,000
Recognized lease asset				$ 106,300
Aircraft
Capital Leased Assets [Line Items]
Lease liability	$ 73,000
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Tax benefit from Tax Cuts and Jobs Act		$ 83,000,000
Additional tax benefit from Tax Cuts and Jobs Act	$ 9,300,000
Tax benefit of the net operating loss carryforwards	2,547,000	2,547,000
Interest and penalties related to tax positions	0
State income tax
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 73,300,000	$ 73,300,000

Income Taxes - Significant Comp

Income Taxes - Significant Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Current
Federal	$ 23,438	$ 49,835		$ 94,459
State	9,087	11,471		13,201
Current income tax expense (benefit)	32,525	61,306		107,660
Deferred
Federal	29,782	(7,017)		25,948
State	5,651	5,922		3,491
Deferred income tax expense (benefit)	35,433	(1,095)	[1]	29,439	[1]
Income tax expense	$ 67,958	$ 60,211	[2]	$ 137,099	[2]
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax expense computed at the statutory federal rate	$ 63,243	$ 136,788		$ 126,427
Increase (decrease) resulting from:
State income taxes, net of federal tax effect	11,643	11,095		10,714
Nondeductible meals	797	1,146		1,100
Tax Cuts and Jobs Act impact	(9,333)	(82,978)		0
Excess tax benefits from stock issuance	(188)	(5,288)		0
Other	1,796	(552)		(1,142)
Income tax expense	$ 67,958	$ 60,211	[1]	$ 137,099	[1]
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Accumulated pension and other postretirement benefits	$ 45,663	$ 54,784
Leases	3,515	4,490
Air traffic liability and frequent flyer liability	70,206	53,102
Partnership deferred revenue	9,697	2,455
State net operating loss carryforwards	2,547	2,547
Accrued compensation	15,843	7,627
Other accrued assets	11,758	11,661
Fuel derivative contracts	2,390	2,156
Other assets	14,031	10,187
Total gross deferred tax assets	175,650	149,009
Less: Valuation allowance	(2,547)	(2,547)
Net deferred tax assets	173,103	146,462
Deferred tax liabilities:
Intangible assets	(3,297)	(3,432)
Property and equipment, principally accelerated depreciation	(324,614)	(265,293)
Other liabilities	(12,962)	(11,878)
Total deferred tax liabilities	(340,873)	(280,603)
Net deferred tax liability	$ (167,770)	$ (134,141)

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits Related to Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 4,081	$ 3,329	$ 0
Increases related to prior year tax positions	336	253	2,830
Increases related to current year tax positions	669	499	499
Ending balance	$ 5,086	$ 4,081	$ 3,329

Contract Termination Expense _3

Contract Termination Expense and Special Items (Details) $ / shares in Units, $ in Thousands

Apr. 01, 2017

Feb. 28, 2018aircraft

Jan. 31, 2018USD ($)aircraftengine

Aug. 31, 2017USD ($)

Mar. 31, 2017

Sep. 30, 2017USD ($)

Dec. 31, 2016USD ($)aircraft

Dec. 31, 2017USD ($)

Dec. 31, 2018USD ($)contract

Dec. 31, 2017USD ($)

Dec. 31, 2016USD ($)$ / shares

Apr. 30, 2017aircraft

Operating

Contract terminations expense

$ 35,322

$ 0

[1]

$ 0

[1]

Operating special items:

Loss on sale of aircraft

0

4,771

0

Collective bargaining agreement

0

18,679

38,781

Impairment charge in connection with its owned B767 fleet and related assets

0

0

[2]

49,361

[2]

Total Contract terminations expense and Operating special items

35,322

23,450

109,142

Other nonoperating special items:

Partial settlement and curtailment loss

0

10,384

0

Loss on plan termination

0

35,201

0

Total Other nonoperating special items

$ 0

45,585

[1]

0

[1]

Terminated contracts | contract

2

Proposed payment for a collective bargaining agreement

$ 34,000

34,000

Profit sharing bonus payment

4,800

Air Line Pilots Association

Operating special items:

Collective bargaining agreement

18,700

Other nonoperating special items:

Contract extension which includes various benefits

63 months

A-330-800-Neo

Other nonoperating special items:

Number of aircrafts terminated | aircraft

6

Number of aircraft purchase rights | aircraft

6

Boeing 767-300

Other nonoperating special items:

Sale leaseback agreement, contract exit costs

$ 67,100

A330

Other nonoperating special items:

Firm orders | aircraft

1

A321

Other nonoperating special items:

Firm orders | aircraft

2

Engine maintenance contract

Operating special items:

Termination of B767 engine maintenance contract

$ 0

0

21,000

B-767 fleet and related assets

Operating special items:

Impairment charge in connection with its owned B767 fleet and related assets

$ 0

0

$ 49,361

Other nonoperating special items:

Impairment charge per diluted share (in dollars per share) | $ / shares

$ 0.92

Salaried And IAM Merged Pension Plan

Other nonoperating special items:

Loss on plan termination

$ 35,200

Health Retirement Account And Post-65 Medical Plan

Other nonoperating special items:

Partial settlement and curtailment loss

10,400

$ 15,000

$ 10,400

Health Retirement Account And Post-65 Medical Plan | Air Line Pilots Association

Other nonoperating special items:

Partial settlement and curtailment loss

$ 10,400

Contract extension which includes various benefits

63 months

Aircraft | Boeing 767-300

Operating special items:

Loss on sale of aircraft

$ 4,800

Other nonoperating special items:

Sale leaseback transaction, number of aircraft | aircraft

3

3

Sale leaseback agreement, number of engines | engine

2

[1]

Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

[2]

Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Employee Benefit Plans - Define

Employee Benefit Plans - Defined Benefit Plans Narrative (Details) $ in Thousands	Apr. 01, 2017	Jan. 01, 2008	Aug. 31, 2017USD ($)	Mar. 31, 2017	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2018USD ($)plan	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Defined Benefit Plan Disclosure [Line Items]
Frozen benefit accruals for pilots as of July 1, 2005, maximum age		50 years
Minimum age of pilots who were participants of plan as of July 1, 2005 for whom further benefit will accrue		50 years
Number of unfunded defined benefit postretirement medical and life insurance plans sponsored by company | plan							4
Settlement and curtailment loss							$ 0	$ 35,201	$ 0
Partial settlement and curtailment loss							$ 0	10,384	$ 0
Minimum
Defined Benefit Plan Disclosure [Line Items]
Contribution to fund plan								$ 18,500
Salaried And IAM Merged Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Settlement and curtailment loss			$ 35,200
Health Retirement Account And Post-65 Medical Plan
Defined Benefit Plan Disclosure [Line Items]
Partial settlement and curtailment loss			10,400		$ 15,000	$ 10,400
Benefit obligations			73,400
Air Line Pilots Association
Defined Benefit Plan Disclosure [Line Items]
Number of months in contract amendment	63 months
Air Line Pilots Association | Health Retirement Account And Post-65 Medical Plan
Defined Benefit Plan Disclosure [Line Items]
Number of months in contract amendment				63 months
Defined benefit plan, benefit obligation, (increase) decrease for cash payment settlement			$ 101,900
Discount rate updated in connection with settlement of liability			3.86%
Partial settlement and curtailment loss			$ 10,400

Employee Benefit Plans - Defi_2

Employee Benefit Plans - Defined Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2017		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Amounts recognized in the statement of financial position consist of:
Noncurrent benefit liability	$ (220,788)	[1]	$ (182,620)	$ (220,788)	[1]
Amounts recognized in accumulated other comprehensive loss
Accumulated pension benefit obligation	424,200		397,500	424,200
Pension
Change in benefit obligations
Benefit obligations, beginning of year			(426,066)	(462,762)
Service cost			(352)	(480)		$ (681)
Interest cost			(15,599)	(18,042)		(19,969)
Actuarial gains (losses)			22,677	(42,775)
Benefits paid			21,253	23,999
Plan amendments			0	0
Settlements			0	73,994
Benefit obligation at end of year	(426,066)		(398,087)	(426,066)		(462,762)
Change in plan assets
Fair value of assets, beginning of year			296,386	302,982
Actual return on plan assets			(17,339)	42,652
Employer contribution			50,230	48,745
Benefits paid			(21,253)	(23,999)
Settlements			0	(73,994)
Fair value of assets at end of year	296,386		308,024	296,386		302,982
Unfunded status at December 31	(129,680)		(90,063)	(129,680)
Amounts recognized in the statement of financial position consist of:
Current benefit liability	(214)		(386)	(214)
Noncurrent benefit liability	(129,466)		(89,677)	(129,466)
Total recognized in the statement of financial position	(129,680)		(90,063)	(129,680)
Amounts recognized in accumulated other comprehensive loss
Unamortized actuarial loss (gain)	112,417		124,560	112,417
Prior service cost (credit)	0		0	0
Total reflected in other comprehensive loss	112,417		124,560	112,417
Other
Change in benefit obligations
Benefit obligations, beginning of year			(120,417)	(224,316)
Service cost			(8,119)	(12,403)		(13,618)
Interest cost			(4,708)	(8,022)		(10,227)
Actuarial gains (losses)			6,007	17,484
Benefits paid			4,639	4,587
Less: federal subsidy on benefits paid			(50)	(57)
Plan amendments	381		0
Settlements			0	101,929
Benefit obligation at end of year	(120,417)		(122,648)	(120,417)		(224,316)
Change in plan assets
Fair value of assets, beginning of year			26,078	24,751
Actual return on plan assets			(1,697)	2,629
Employer contribution			6,621	3,285
Benefits paid			(4,639)	(4,587)
Settlements			0	0
Fair value of assets at end of year	26,078		26,363	26,078		$ 24,751
Unfunded status at December 31	(94,339)		(96,285)	(94,339)
Amounts recognized in the statement of financial position consist of:
Current benefit liability	(3,017)		(3,342)	(3,017)
Noncurrent benefit liability	(91,322)		(92,943)	(91,322)
Total recognized in the statement of financial position	(94,339)		(96,285)	(94,339)
Amounts recognized in accumulated other comprehensive loss
Unamortized actuarial loss (gain)	(13,521)		(15,606)	(13,521)
Prior service cost (credit)	1,962		1,737	1,962
Total reflected in other comprehensive loss	$ (11,559)		$ (13,869)	$ (11,559)
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Employee Benefit Plans - Net Pe

Employee Benefit Plans - Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Components of Net Periodic Benefit Cost
Settlement and curtailment loss		$ 0	$ 10,384	$ 0
Pension
Components of Net Periodic Benefit Cost
Service cost		352	480	681
Interest cost		15,599	18,042	19,969
Expected return on plan assets		(20,948)	(17,291)	(16,746)
Recognized net actuarial loss (gain)		3,482	9,033	7,526
Prior service cost (credit)		0	(28)	(2)
Total other components of the net periodic benefit cost		(1,867)	9,756	10,747
Settlement and curtailment loss		0	35,201	0
Net periodic benefit cost		(1,515)	45,437	11,428
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss
Current year actuarial (gain) loss		15,625	17,414	25,559
Current year prior service cost		0	0	(932)
Amortization of actuarial gain (loss)		(3,482)	(9,033)	(7,526)
Amortization of prior service credit (cost)		0	28	2
Settlement and curtailment loss		0	(35,201)	0
Total recognized in other comprehensive loss		12,143	(26,792)	17,103
Total recognized in net periodic benefit cost and other comprehensive loss		10,628	18,645	28,531
Other
Components of Net Periodic Benefit Cost
Service cost		8,119	12,403	13,618
Interest cost		4,708	8,022	10,227
Expected return on plan assets		(1,413)	(1,106)	(1,137)
Recognized net actuarial loss (gain)		(774)	(241)	204
Prior service cost (credit)		225	282	229
Total other components of the net periodic benefit cost		2,746	6,957	9,523
Settlement and curtailment loss	$ (4,600)	0	10,384	0
Net periodic benefit cost		10,865	29,744	23,141
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss
Current year actuarial (gain) loss		(2,858)	(18,972)	(7,677)
Current year prior service cost		0	(381)	0
Amortization of actuarial gain (loss)		774	241	(204)
Amortization of prior service credit (cost)		(225)	(282)	(229)
Settlement and curtailment loss		0	(10,384)	0
Total recognized in other comprehensive loss		(2,309)	(29,778)	(8,110)
Total recognized in net periodic benefit cost and other comprehensive loss		$ 8,556	$ (34)	$ 15,031

Employee Benefit Plans - Weight

Employee Benefit Plans - Weighted Average Actuarial Assumptions (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected return on plan assets used to determine net periodic benefit expense, disability	4.90%
Pension
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate to determine net periodic benefit expense	3.70%	4.19%
Discount rate to determine projected benefit obligation	4.35%	3.70%
Expected return on plan assets	7.33%	6.34%
Expected return on plan assets used to determine net periodic benefit expense	6.91%
Postretirement
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate to determine net periodic benefit expense	3.71%	4.29%
Discount rate to determine projected benefit obligation	4.36%	3.71%
Health care trend rate to determine net periodic benefit expense	7.25%	7.75%
Ultimate trend rate	4.75%	7.25%
Years to reach ultimate trend rate	5 years	6 years
Health care trend rate to determine projected benefit obligation	6.75%	7.25%
Ultimate trend rate	4.75%	4.75%
Years to reach ultimate trend rate	4 years	5 years
Disability
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate to determine net periodic benefit expense, Disability	3.72%	4.24%
Discount rate to determine projected benefit obligation, Disability	4.39%	3.72%
Expected return on plan assets, Disability	4.90%	4.60%
Career progression | Pension | Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Assumed rate of compensation increases	2.00%
Career progression | Pension | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Assumed rate of compensation increases		7.30%

Employee Benefit Plans - Change

Employee Benefit Plans - Change in Assumptions and Estimates (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract]
Effect on postretirement benefit obligation, 100 Basis Point Increase	$ 8,048
Effect on total service and interest cost, 100 Basis Point Increase	892
Effect on postretirement benefit obligation, 100 Basis Point Decrease	(6,916)
Effect on total service and interest cost, 100 Basis Point Decrease	(744)
Pension
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Actuarial (gain) loss	4,031
Amortization of prior service cost	0
To be recognized in net periodic benefit cost from accumulated other comprehensive (gain) loss	4,031
Postretirement
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Actuarial (gain) loss	(707)
Amortization of prior service cost	225
To be recognized in net periodic benefit cost from accumulated other comprehensive (gain) loss	$ (482)

Employee Benefit Plans - Plan A

Employee Benefit Plans - Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Asset allocation, actual	100.00%
Asset allocation, target	100.00%
Pension Benefits
Expected Future Benefit Payments
2,019	$ 23,343
2,020	24,471
2,021	25,252
2,022	25,730
2,023	26,189
2024 - 2028	132,395
Expected future benefit payments	257,380
Prescription Drug Subsidy Receipts, Rolling Maturity [Abstract] (Deprecated 2017-01-31)
Defined Benefit Plan, Plan Assets, Amount	308,024	$ 296,386	$ 302,982
Other Benefits
Expected Future Benefit Payments
2,019	5,254
2,020	6,040
2,021	6,848
2,022	7,425
2,023	8,051
2024 - 2028	47,804
Expected future benefit payments	81,422
Prescription Drug Subsidy Receipts, Rolling Maturity [Abstract] (Deprecated 2017-01-31)
2019, Expected Federal Subsidy	(47)
2020, Expected Federal Subsidy	(51)
2021, Expected Federal Subsidy	(54)
2022, Expected Federal Subsidy	(56)
2023, Expected Federal Subsidy	(58)
2024 - 2028, Expected Federal Subsidy	(304)
Expected Federal Subsidy	(570)
Defined Benefit Plan, Plan Assets, Amount	$ 26,363	26,078	$ 24,751
Equity securities | Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Asset allocation, actual	57.00%
Asset allocation, target	60.00%
Prescription Drug Subsidy Receipts, Rolling Maturity [Abstract] (Deprecated 2017-01-31)
Defined Benefit Plan, Plan Assets, Amount	$ 175,583	177,252
Fixed income securities | Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Asset allocation, actual	39.00%
Asset allocation, target	35.00%
Prescription Drug Subsidy Receipts, Rolling Maturity [Abstract] (Deprecated 2017-01-31)
Defined Benefit Plan, Plan Assets, Amount	$ 110,650	100,504
Real estate investment trusts | Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Asset allocation, actual	4.00%
Asset allocation, target	5.00%
Prescription Drug Subsidy Receipts, Rolling Maturity [Abstract] (Deprecated 2017-01-31)
Defined Benefit Plan, Plan Assets, Amount	$ 14,718	14,587
Insurance company pooled separate account | Pension Benefits
Prescription Drug Subsidy Receipts, Rolling Maturity [Abstract] (Deprecated 2017-01-31)
Defined Benefit Plan, Plan Assets, Amount	7,076	4,044
Total plan assets, excluding cash and receivables | Pension Benefits
Prescription Drug Subsidy Receipts, Rolling Maturity [Abstract] (Deprecated 2017-01-31)
Defined Benefit Plan, Plan Assets, Amount	308,027	296,387
Common collective trust fund | Other Benefits
Prescription Drug Subsidy Receipts, Rolling Maturity [Abstract] (Deprecated 2017-01-31)
Defined Benefit Plan, Plan Assets, Amount	$ 26,217	$ 25,973

Employee Benefit Plans - Defi_3

Employee Benefit Plans - Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Retirement Benefits [Abstract]
Contributions to the defined contribution plans	$ 42	$ 39.1	$ 31.6

Capital Stock and Share-based_3

Capital Stock and Share-based Compensation - Common Stock and Special Preffered Stock (Details)	12 Months Ended
	Dec. 31, 2018class_of_stockdirectorvote$ / sharesshares	Dec. 31, 2017$ / shares
Class of Stock [Line Items]
Number of class of common stock issued and outstanding | class_of_stock	1
Number of shares of Special Preferred Stock held by each union | shares	1
Number of directors eligible for nomination by each union | director	1
Special preferred stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Multiplier of dividend per share paid on common stock to determine dividend on Special Preferred Stock	2
Conversion ratio for Special Preferred Stock	1
Common Stock
Class of Stock [Line Items]
Number of votes per share	1
Preferred Stock
Class of Stock [Line Items]
Number of votes per share	1

Capital Stock and Share-based_4

Capital Stock and Share-based Compensation - Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Feb. 28, 2019	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Subsequent Event [Line Items]
Cash payment for dividends		$ 24,171	$ 6,261		$ 0
Cash dividends declared per common share (in dollars per share)		$ 0.48	$ 0.12	[1]	$ 0	[1]
Subsequent Event
Subsequent Event [Line Items]
Cash dividends declared per common share (in dollars per share)	$ 0.12
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Capital Stock and Share-based_5

Capital Stock and Share-based Compensation - Stock Repurchase Program (Details) - USD ($) shares in Millions	1 Months Ended	12 Months Ended
	Nov. 30, 2017	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Approved stock repurchase program, amount	$ 100,000,000
Period of time to repurchase outstanding stock	2 years
Amount spent to repurchase shares		$ 102,500,000	$ 100,000,000
Number of shares repurchased (in shares)		2.8	2.5
Amount remaining to spend under the stock repurchase program		$ 97,500,000

Capital Stock and Share-based_6

Capital Stock and Share-based Compensation - Share-Based Compensation and Stock Options (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense recognized	$ 5.3	$ 7.3	$ 8.4
Share-based compensation expense related to unvested stock options and other stock awards	$ 5.4
Weighted average period related expense will be recognized	1 year 3 months
Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense related to unvested stock options and other stock awards	$ 0.4

Capital Stock and Share-based_7

Capital Stock and Share-based Compensation - Performance-Based Stock Awards (Details) - Performance Shares - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted, before performance based metric (in shares)	83,293
Maximum payout (in shares)	166,586
Vesting period	3 years
Additional shares from performance based metric (in shares)	77,055
Number of units
Non-vested at the beginning of the period (in shares)	381,956	422,297	678,742
Granted (in shares)	160,348	355,897	117,849
Vested (in shares)	(211,053)	(358,619)	(349,403)
Forfeited (in shares)	(69,399)	(37,619)	(24,891)
Non-vested at the end of the period (in shares)	261,852	381,956	422,297
Weighted average grant date fair value
Non-vested at the beginning of the period (in dollars per share)	$ 28.03	$ 14	$ 10.53
Granted (in dollars per share)	39.09	43.51	33.94
Vested (in dollars per share)	26.28	12.71	7.32
Forfeited (in dollars per share)	39.42	27.60	13.45
Non-vested at the end of the period (in dollars per share)	$ 33.01	$ 28.03	$ 14
Fair value of vested awards	$ 8.2	$ 17.9	$ 11.3

Capital Stock and Share-based_8

Capital Stock and Share-based Compensation - Time-Based Stock Awards (Details) - Service-Based Stock Awards - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (in shares)	128,617	22,898	110,276
Number of units
Non-vested at the beginning of the period (in shares)	91,378	195,449	270,721
Granted (in shares)	128,617	22,898	110,276
Vested (in shares)	(68,803)	(110,575)	(169,218)
Forfeited (in shares)	(8,241)	(16,394)	(16,330)
Non-vested at the end of the period (in shares)	142,951	91,378	195,449
Weighted average grant date fair value
Non-vested at the beginning of the period (in dollars per share)	$ 28.12	$ 24.29	$ 15.02
Granted (in dollars per share)	38.71	49.95	37.08
Vested (in dollars per share)	38.98	23.80	16.32
Forfeited (in dollars per share)	38.03	26.71	20.46
Non-vested at the end of the period (in dollars per share)	$ 38.77	$ 28.12	$ 24.29
Fair value of vested awards	$ 2.7	$ 5.6	$ 6.1
Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years
Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years

Commitments and Contingent Li_3

Commitments and Contingent Liabilities - Expenditures (Details) $ in Thousands	Dec. 31, 2018USD ($)
Long-term Purchase Commitment [Line Items]
2,019	$ 404,710
2,020	231,999
2,021	369,288
2,022	489,709
2,023	289,996
Thereafter	642,634
Total contractual obligation	2,428,336
Aircraft and aircraft related
Long-term Purchase Commitment [Line Items]
2,019	330,089
2,020	162,270
2,021	303,184
2,022	431,210
2,023	236,639
Thereafter	477,788
Total contractual obligation	1,941,180
Other
Long-term Purchase Commitment [Line Items]
2,019	74,621
2,020	69,729
2,021	66,104
2,022	58,499
2,023	53,357
Thereafter	164,846
Total contractual obligation	$ 487,156

Commitments and Contingent Li_4

Commitments and Contingent Liabilities - Orders and Purchase Rights (Details) - Aircraft and aircraft related	12 Months Ended
	Dec. 31, 2018orderpurchase_right
Pratt & Whitney spare engines, A321 neo
Long-term Purchase Commitment [Line Items]
Firm Orders | order	1
Purchase Rights | purchase_right	2
Rolls-Royce spare engines, A330-800neo
Long-term Purchase Commitment [Line Items]
Firm Orders | order	2
Purchase Rights | purchase_right	2
A321neo aircraft
Long-term Purchase Commitment [Line Items]
Firm Orders | order	7
Purchase Rights | purchase_right	3
B787-9 aircraft
Long-term Purchase Commitment [Line Items]
Firm Orders | order	10
Purchase Rights | purchase_right	10

Commitments and Contingent Li_5

Commitments and Contingent Liabilities - Narrative (Details) $ in Millions	1 Months Ended			12 Months Ended
	Oct. 31, 2018orderpurchase_right	Jul. 31, 2018aircraft	Feb. 28, 2018aircraft	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Long-term Purchase Commitment [Line Items]
Percentage of employees represented by unions				84.00%
Association of Flight Attendants
Long-term Purchase Commitment [Line Items]
Percentage of employees represented by unions				29.00%
Credit card processing agreements
Long-term Purchase Commitment [Line Items]
Restricted cash | $				$ 0	$ 1
Maximum amount that holdback could increase				100.00%
A-330-800-Neo
Long-term Purchase Commitment [Line Items]
Number of aircrafts terminated			6
Number of aircraft purchase rights			6
B787-9 aircraft
Long-term Purchase Commitment [Line Items]
Number of aircrafts under purchase agreement		10
Number of aircrafts with purchase rights under purchase agreement		10
B787-9 aircraft | GEnx Engines
Long-term Purchase Commitment [Line Items]
Number of engine firm order | purchase_right	20
Number of engine, purchase rights | order	20
B787-9 aircraft | GEnx spare engines
Long-term Purchase Commitment [Line Items]
Number of spare engines, with option to purchase | purchase_right	4

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Cash payments for interest (net of amounts capitalized)	$ 24,343	$ 23,134	$ 29,751
Cash payments for income taxes	16,063	65,812	92,934
Investing and Financing Activities Not Affecting Cash:
Property and equipment acquired through a capital or financing lease	119,530	72,996	6,092
Maintenance hangar project (see Note 9)	$ 0	$ 0	$ 72,996

Condensed Consolidating Finan_3

Condensed Consolidating Financial Information - Condensed Consolidating Statements of Operations and Comprehensive Income (Loss) (Details) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2018USD ($)pass_through_trust	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	[1]	Sep. 30, 2017USD ($)	[1]	Jun. 30, 2017USD ($)	[1]	Mar. 31, 2017USD ($)	[1]	Dec. 31, 2018USD ($)pass_through_trust	Dec. 31, 2017USD ($)		Dec. 31, 2016USD ($)		Dec. 31, 2013pass_through_trust
Condensed Consolidating Statements of Operations and Comprehensive Income (Loss)
Number of pass-through trusts | pass_through_trust																		2
Operating Revenue:
Total Operating Revenue	$ 697,465	$ 759,087	$ 715,447	$ 665,412	$ 682,604		$ 716,216		$ 670,116		$ 606,209		$ 2,837,411	$ 2,675,145	[2]	$ 2,432,413	[2]
Operating Expenses:
Aircraft fuel, including taxes and delivery													599,544	440,383	[2]	344,322	[2]
Wages and benefits													684,719	632,997	[2]	535,264	[2]
Aircraft rent													125,961	137,764	[2]	124,565	[2]
Maintenance materials and repairs													239,759	219,553	[2]	229,044	[2]
Aircraft and passenger servicing													157,796	144,853	[2]	129,899	[2]
Commissions and other selling													129,315	126,750	[2]	122,787	[2]
Depreciation and amortization													139,866	113,277	[2]	108,128	[2]
Other rentals and landing fees													126,903	116,763	[2]	108,087	[2]
Purchased services													131,651	110,787	[2]	96,199	[2]
Special items													35,322	23,450		109,142
Contract terminations expense													35,322	0	[2]	0	[2]
Other													152,207	144,530	[2]	127,489	[2]
Total													2,523,043	2,211,107	[2]	2,034,926	[2]
Operating Income	69,349	115,826	92,928	36,265	96,166		169,002		136,840		62,030		314,368	464,038	[2]	397,487	[2]
Nonoperating Income (Expense):
Undistributed net income of subsidiaries													0	0		0
Other nonoperating special items													0	(45,585)	[2]	0	[2]
Interest expense and amortization of debt discounts and issuance costs													(33,001)	(30,901)	[2]	(36,612)	[2]
Interest income													9,242	6,132	[2]	4,007	[2]
Capitalized interest													7,887	8,437	[2]	2,651	[2]
Other components of net periodic benefit cost													(825)	(16,713)	[2]	(20,270)	[2]
Gains on fuel derivatives													5,590	3,312	[2]	20,106	[2]
Loss on extinguishment of debt													0	0	[2],[3]	(10,473)	[2],[3]
Other, net													(2,103)	2,101	[2]	4,323	[2]
Total	(27,830)	931	12,859	830	9,899		(54,113)		(13,191)		(15,813)		(13,210)	(73,217)	[2]	(36,268)	[2]
Income Before Income Taxes													301,158	390,821	[2]	361,219	[2]
Income tax expense (benefit)													67,958	60,211	[2]	137,099	[2]
Net Income	$ 31,636	$ 93,542	$ 79,480	$ 28,542	$ 148,448		$ 71,622		$ 76,894		$ 33,645		233,200	330,610	[2],[3],[4]	224,120	[2],[3],[4]
Comprehensive Income (Loss)													227,834	358,839	[4]	219,904	[4]
Eliminations
Operating Revenue:
Total Operating Revenue													(405)	(392)		(363)
Operating Expenses:
Aircraft fuel, including taxes and delivery													0	0		0
Wages and benefits													0	0		0
Aircraft rent													0	0		0
Maintenance materials and repairs													0	0		0
Aircraft and passenger servicing													0	0		0
Commissions and other selling													(140)	(137)		(126)
Depreciation and amortization													0	0		0
Other rentals and landing fees													0	0		0
Purchased services													(61)	(60)		(60)
Special items														0		0
Contract terminations expense													0
Other													(204)	(195)		(177)
Total													(405)	(392)		(363)
Operating Income													0	0		0
Nonoperating Income (Expense):
Undistributed net income of subsidiaries													(238,365)	(333,476)		(226,561)
Other nonoperating special items													0	0
Interest expense and amortization of debt discounts and issuance costs													0	0		0
Interest income													0	0		0
Capitalized interest													0	0		0
Other components of net periodic benefit cost													0	0		0
Gains on fuel derivatives													0	0		0
Loss on extinguishment of debt																0
Other, net													0	0		0
Total													(238,365)	(333,476)		(226,561)
Income Before Income Taxes													(238,365)	(333,476)		(226,561)
Income tax expense (benefit)													0	0		0
Net Income													(238,365)	(333,476)		(226,561)
Comprehensive Income (Loss)													(232,999)	(361,707)		(222,344)
Parent Issuer / Guarantor | Reportable Legal Entities
Operating Revenue:
Total Operating Revenue													0	0		0
Operating Expenses:
Aircraft fuel, including taxes and delivery													0	0		0
Wages and benefits													0	0		0
Aircraft rent													0	0		0
Maintenance materials and repairs													0	0		0
Aircraft and passenger servicing													0	0		0
Commissions and other selling													(5)	84		72
Depreciation and amortization													0	0		0
Other rentals and landing fees													0	0		0
Purchased services													195	478		149
Special items														0		0
Contract terminations expense													0
Other													6,527	5,393		5,300
Total													6,717	5,955		5,521
Operating Income													(6,717)	(5,955)		(5,521)
Nonoperating Income (Expense):
Undistributed net income of subsidiaries													238,365	333,476		226,561
Other nonoperating special items													0	0
Interest expense and amortization of debt discounts and issuance costs													(3)	0		117
Interest income													185	0		265
Capitalized interest													0	0		0
Other components of net periodic benefit cost													0	0		0
Gains on fuel derivatives													0	0		0
Loss on extinguishment of debt																0
Other, net													(4)
Total													238,543	333,476		226,943
Income Before Income Taxes													231,826	327,521		221,422
Income tax expense (benefit)													(1,374)	(3,089)		(2,698)
Net Income													233,200	330,610		224,120
Comprehensive Income (Loss)													$ 227,834	358,841		219,903
Subsidiary Issuer / Guarantor
Condensed Consolidating Statements of Operations and Comprehensive Income (Loss)
Number of pass-through trusts | pass_through_trust	2												2
Subsidiary Issuer / Guarantor | Reportable Legal Entities
Operating Revenue:
Total Operating Revenue													$ 2,827,215	2,667,435		2,426,479
Operating Expenses:
Aircraft fuel, including taxes and delivery													599,544	440,383		344,322
Wages and benefits													684,719	632,997		535,264
Aircraft rent													125,883	137,289		124,521
Maintenance materials and repairs													233,503	215,473		225,707
Aircraft and passenger servicing													157,796	144,853		129,899
Commissions and other selling													129,332	126,674		122,717
Depreciation and amortization													134,651	109,458		104,689
Other rentals and landing fees													126,509	116,763		108,087
Purchased services													130,665	109,436		95,450
Special items														23,450		109,142
Contract terminations expense													35,322
Other													142,125	137,494		121,104
Total													2,500,049	2,194,270		2,020,902
Operating Income													327,166	473,165		405,577
Nonoperating Income (Expense):
Undistributed net income of subsidiaries													0	0		0
Other nonoperating special items													0	(45,585)
Interest expense and amortization of debt discounts and issuance costs													(32,861)	(30,901)		(36,729)
Interest income													9,057	5,830		3,742
Capitalized interest													7,887	8,437		2,651
Other components of net periodic benefit cost													(825)	(16,713)		(20,270)
Gains on fuel derivatives													5,590	3,312		20,106
Loss on extinguishment of debt																(10,473)
Other, net													(2,117)	2,101		4,323
Total													(13,269)	(73,519)		(36,650)
Income Before Income Taxes													313,897	399,646		368,927
Income tax expense (benefit)													70,634	63,300		139,797
Net Income													243,263	336,346		229,130
Comprehensive Income (Loss)													237,897	364,575		224,914
Non-Guarantor Subsidiaries | Reportable Legal Entities
Operating Revenue:
Total Operating Revenue													10,601	8,102		6,297
Operating Expenses:
Aircraft fuel, including taxes and delivery													0	0		0
Wages and benefits													0	0		0
Aircraft rent													78	475		44
Maintenance materials and repairs													6,256	4,080		3,337
Aircraft and passenger servicing													0	0		0
Commissions and other selling													128	129		124
Depreciation and amortization													5,215	3,819		3,439
Other rentals and landing fees													394	0		0
Purchased services													852	933		660
Special items														0		0
Contract terminations expense													0
Other													3,759	1,838		1,262
Total													16,682	11,274		8,866
Operating Income													(6,081)	(3,172)		(2,569)
Nonoperating Income (Expense):
Undistributed net income of subsidiaries													0	0		0
Other nonoperating special items													0	0
Interest expense and amortization of debt discounts and issuance costs													(137)	0		0
Interest income													0	302		0
Capitalized interest													0	0		0
Other components of net periodic benefit cost													0	0		0
Gains on fuel derivatives													0	0		0
Loss on extinguishment of debt																0
Other, net													18	0		0
Total													(119)	302		0
Income Before Income Taxes													(6,200)	(2,870)		(2,569)
Income tax expense (benefit)													(1,302)	0		0
Net Income													(4,898)	(2,870)		(2,569)
Comprehensive Income (Loss)													$ (4,898)	$ (2,870)		$ (2,569)
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[3]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[4]	Amounts adjusted for the adoption of ASC No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Condensed Consolidating Finan_4

Condensed Consolidating Financial Information - Condensed Consolidating Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 268,577	$ 190,953	[1]
Restricted cash	0	1,000	[1]
Short-term investments	232,241	269,297	[1]
Accounts receivable, net	111,834	140,279	[1]
Spare parts and supplies, net	33,942	35,361	[1]
Prepaid expenses and other	58,573	79,186	[1]
Total	705,167	716,076	[1]
Property and equipment at cost	2,848,572	2,400,811	[1]
Less accumulated depreciation and amortization	(663,461)	(558,548)	[1]
Total	2,185,111	1,842,263	[1]
Long-term prepayments and other	185,556	193,632	[1]
Deferred tax assets, net	0	0
Goodwill and other intangible assets, net	120,812	121,850
Intercompany receivable	0	0
Investment in consolidated subsidiaries	0	0
Total Assets	3,196,646	2,873,821	[1]
Current liabilities:
Accounts payable	143,146	140,805	[1]
Air traffic liability and current frequent flyer deferred revenue	603,736	589,093	[1]
Other accrued liabilities	158,154	147,593	[1]
Current maturities of long-term debt, less discount, and capital lease obligations	101,097	59,470	[1]
Total	1,006,133	936,961	[1]
Long-term debt and capital lease obligations	608,684	511,201	[1]
Intercompany payable	0	0
Other liabilities and deferred credits:
Accumulated pension and other postretirement benefit obligations	182,620	220,788	[1]
Other liabilities and deferred credits	119,826	75,841	[1]
Noncurrent frequent flyer deferred revenue	163,619	149,764	[1]
Deferred tax liability, net	167,770	134,141	[1]
Total	633,835	580,534	[1]
Shareholders' equity	947,994	845,125	[1]	$ 593,067	$ 446,062
Total Liabilities and Shareholders' Equity	3,196,646	2,873,821	[1]
Eliminations
Current assets:
Cash and cash equivalents	0	0
Restricted cash	0	0
Short-term investments	0	0
Accounts receivable, net	(234)	(209)
Spare parts and supplies, net	0	0
Prepaid expenses and other	0	0
Total	(234)	(209)
Property and equipment at cost	0	0
Less accumulated depreciation and amortization	0	0
Total	0	0
Long-term prepayments and other	(63,494)	0
Deferred tax assets, net	0	(31,845)
Goodwill and other intangible assets, net	0	0
Intercompany receivable	(456,338)	(392,791)
Investment in consolidated subsidiaries	(1,325,380)	(1,137,941)
Total Assets	(1,845,446)	(1,562,786)
Current liabilities:
Accounts payable	(234)	(209)
Air traffic liability and current frequent flyer deferred revenue	0	0
Other accrued liabilities	0	0
Current maturities of long-term debt, less discount, and capital lease obligations	0	0
Total	(234)	(209)
Long-term debt and capital lease obligations	0	0
Intercompany payable	(456,338)	(392,791)
Other liabilities and deferred credits:
Accumulated pension and other postretirement benefit obligations	0	0
Other liabilities and deferred credits	0
Noncurrent frequent flyer deferred revenue	0	0
Deferred tax liability, net	0	(31,845)
Total	0	(31,845)
Shareholders' equity	(1,388,874)	(1,137,941)
Total Liabilities and Shareholders' Equity	(1,845,446)	(1,562,786)
Parent Issuer / Guarantor | Reportable Legal Entities
Current assets:
Cash and cash equivalents	5,154	57,405
Restricted cash	0	0
Short-term investments	0	0
Accounts receivable, net	0	25
Spare parts and supplies, net	0	0
Prepaid expenses and other	165	171
Total	5,319	57,601
Property and equipment at cost	0	0
Less accumulated depreciation and amortization	0	0
Total	0	0
Long-term prepayments and other	62,990	0
Deferred tax assets, net	0	31,845
Goodwill and other intangible assets, net	0	0
Intercompany receivable	0	0
Investment in consolidated subsidiaries	1,325,380	1,137,941
Total Assets	1,393,689	1,227,387
Current liabilities:
Accounts payable	665	622
Air traffic liability and current frequent flyer deferred revenue	0	0
Other accrued liabilities	0	32
Current maturities of long-term debt, less discount, and capital lease obligations	0	0
Total	665	654
Long-term debt and capital lease obligations	0	0
Intercompany payable	445,030	381,608
Other liabilities and deferred credits:
Accumulated pension and other postretirement benefit obligations	0	0
Other liabilities and deferred credits	0	0
Noncurrent frequent flyer deferred revenue	0	0
Deferred tax liability, net	0	0
Total	0	0
Shareholders' equity	947,994	845,125
Total Liabilities and Shareholders' Equity	1,393,689	1,227,387
Subsidiary Issuer / Guarantor | Reportable Legal Entities
Current assets:
Cash and cash equivalents	255,279	125,861
Restricted cash	0	1,000
Short-term investments	232,241	269,297
Accounts receivable, net	109,499	139,008
Spare parts and supplies, net	33,942	35,361
Prepaid expenses and other	58,296	78,933
Total	689,257	649,460
Property and equipment at cost	2,756,551	2,326,249
Less accumulated depreciation and amortization	(648,111)	(546,831)
Total	2,108,440	1,779,418
Long-term prepayments and other	185,161	193,449
Deferred tax assets, net	0	0
Goodwill and other intangible assets, net	120,119	120,695
Intercompany receivable	456,338	392,791
Investment in consolidated subsidiaries	0	0
Total Assets	3,559,315	3,135,813
Current liabilities:
Accounts payable	139,552	138,818
Air traffic liability and current frequent flyer deferred revenue	598,387	584,366
Other accrued liabilities	157,842	147,211
Current maturities of long-term debt, less discount, and capital lease obligations	101,052	59,470
Total	996,833	929,865
Long-term debt and capital lease obligations	604,089	511,201
Intercompany payable	0	0
Other liabilities and deferred credits:
Accumulated pension and other postretirement benefit obligations	182,620	220,788
Other liabilities and deferred credits	118,682	74,736
Noncurrent frequent flyer deferred revenue	163,619	149,764
Deferred tax liability, net	167,770	165,986
Total	632,691	611,274
Shareholders' equity	1,325,702	1,083,473
Total Liabilities and Shareholders' Equity	3,559,315	3,135,813
Non-Guarantor Subsidiaries | Reportable Legal Entities
Current assets:
Cash and cash equivalents	8,144	7,687
Restricted cash	0	0
Short-term investments	0	0
Accounts receivable, net	2,569	1,455
Spare parts and supplies, net	0	0
Prepaid expenses and other	112	82
Total	10,825	9,224
Property and equipment at cost	92,021	74,562
Less accumulated depreciation and amortization	(15,350)	(11,717)
Total	76,671	62,845
Long-term prepayments and other	899	183
Deferred tax assets, net	0	0
Goodwill and other intangible assets, net	693	1,155
Intercompany receivable	0	0
Investment in consolidated subsidiaries	0	0
Total Assets	89,088	73,407
Current liabilities:
Accounts payable	3,163	1,574
Air traffic liability and current frequent flyer deferred revenue	5,349	4,727
Other accrued liabilities	312	350
Current maturities of long-term debt, less discount, and capital lease obligations	45	0
Total	8,869	6,651
Long-term debt and capital lease obligations	4,595	0
Intercompany payable	11,308	11,183
Other liabilities and deferred credits:
Accumulated pension and other postretirement benefit obligations	0	0
Other liabilities and deferred credits	1,144	1,105
Noncurrent frequent flyer deferred revenue	0	0
Deferred tax liability, net	0	0
Total	1,144	1,105
Shareholders' equity	63,172	54,468
Total Liabilities and Shareholders' Equity	$ 89,088	$ 73,407
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Condensed Consolidating Finan_5

Condensed Consolidating Financial Information - Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided By (Used In) Operating Activities:		$ 508,508	$ 331,135	[1]	$ 437,044	[1]
Cash Flows From Investing Activities:
Net payments to affiliates		0	0		0
Additions to property and equipment, including pre-delivery deposits		(486,777)	(341,515)	[1]	(178,838)	[1]
Proceeds from purchase assignment and leaseback transactions		87,000	33,000	[1]	31,851	[1]
Proceeds from disposition of property and equipment		46,714	941	[1]	16	[1]
Purchases of investments		(210,836)	(231,393)	[1]	(260,987)	[1]
Sales of investments		247,423	244,261	[1]	253,855	[1]
Net cash used in investing activities		(316,476)	(294,706)	[1]	(154,103)	[1]
Cash Flows From Financing Activities:
Long-term borrowings		86,500	0	[1]	0	[1]
Repayments of long-term debt and capital lease obligations		(68,245)	(61,486)	[1]	(214,025)	[1]
Dividend payments		(24,171)	(6,261)	[1]	0	[1]
Repurchases and conversion of convertible notes		0	0	[1]	(1,426)	[1]
Repurchases of common stock		(102,500)	(100,000)	[1]	(13,763)	[1]
Debt issuance costs		(3,350)	(188)	[1]	(1,653)	[1]
Net payments from affiliates		0	0		0
Other		(3,642)	(7,532)		(7,585)
Net cash used in financing activities		(115,408)	(175,467)	[1]	(238,452)	[1]
Net increase (decrease) in cash and cash equivalents		76,624	(139,038)	[1]	44,489	[1]
Cash, cash equivalents, and restricted cash—Beginning of Year	[1]	191,953	330,991		286,502
Cash, cash equivalents, and restricted cash—End of Year		268,577	191,953	[1]	330,991	[1]
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided By (Used In) Operating Activities:		0	0		0
Cash Flows From Investing Activities:
Net payments to affiliates		105,915	105,754		28,927
Additions to property and equipment, including pre-delivery deposits		0	0		0
Proceeds from purchase assignment and leaseback transactions		0	0		0
Proceeds from disposition of property and equipment		0	0		0
Purchases of investments		0	0		0
Sales of investments		0	0		0
Net cash used in investing activities		105,915	105,754		28,927
Cash Flows From Financing Activities:
Long-term borrowings		0
Repayments of long-term debt and capital lease obligations		0	0		0
Dividend payments		0	0
Repurchases and conversion of convertible notes					0
Repurchases of common stock		0	0		0
Debt issuance costs		0	0		0
Net payments from affiliates		(105,915)	(105,754)		(28,927)
Other					0
Net cash used in financing activities		(105,915)	(105,754)		(28,927)
Net increase (decrease) in cash and cash equivalents		0	0		0
Cash, cash equivalents, and restricted cash—Beginning of Year		0	0		0
Cash, cash equivalents, and restricted cash—End of Year		0	0		0
Parent Issuer / Guarantor | Reportable Legal Entities
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided By (Used In) Operating Activities:		(2,773)	(4,803)		(4,954)
Cash Flows From Investing Activities:
Net payments to affiliates		(14,400)	(2,500)		0
Additions to property and equipment, including pre-delivery deposits		0	0		0
Proceeds from purchase assignment and leaseback transactions		0	0		0
Proceeds from disposition of property and equipment		0	0		0
Purchases of investments		0	0		0
Sales of investments		0	0		0
Net cash used in investing activities		(14,400)	(2,500)		0
Cash Flows From Financing Activities:
Long-term borrowings		0
Repayments of long-term debt and capital lease obligations			0
Dividend payments		(24,171)	(6,261)
Repurchases and conversion of convertible notes					(1,426)
Repurchases of common stock		(102,500)	(100,000)		(13,763)
Debt issuance costs		0	0		0
Net payments from affiliates		91,515	103,254		17,894
Other		78	86		458
Net cash used in financing activities		(35,078)	(2,921)		3,163
Net increase (decrease) in cash and cash equivalents		(52,251)	(10,224)		(1,791)
Cash, cash equivalents, and restricted cash—Beginning of Year		57,405	67,629		69,420
Cash, cash equivalents, and restricted cash—End of Year		5,154	57,405		67,629
Subsidiary Issuer / Guarantor | Reportable Legal Entities
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided By (Used In) Operating Activities:		509,405	334,433		440,203
Cash Flows From Investing Activities:
Net payments to affiliates		(91,515)	(103,254)		(28,927)
Additions to property and equipment, including pre-delivery deposits		(470,970)	(336,820)		(165,710)
Proceeds from purchase assignment and leaseback transactions		87,000	33,000		31,851
Proceeds from disposition of property and equipment		46,714	941		15
Purchases of investments		(210,836)	(231,393)		(260,987)
Sales of investments		247,423	244,261		253,855
Net cash used in investing activities		(392,184)	(393,265)		(169,903)
Cash Flows From Financing Activities:
Long-term borrowings		86,500
Repayments of long-term debt and capital lease obligations		(68,233)	(61,486)		(214,025)
Dividend payments		0	0
Repurchases and conversion of convertible notes					0
Repurchases of common stock		0	0		0
Debt issuance costs		(3,350)	(188)		(1,653)
Net payments from affiliates		0	0		0
Other		(3,720)	(7,618)		(8,043)
Net cash used in financing activities		11,197	(69,292)		(223,721)
Net increase (decrease) in cash and cash equivalents		128,418	(128,124)		46,579
Cash, cash equivalents, and restricted cash—Beginning of Year		126,861	254,985		208,406
Cash, cash equivalents, and restricted cash—End of Year		255,279	126,861		254,985
Non-Guarantor Subsidiaries | Reportable Legal Entities
Condensed Financial Statements, Captions [Line Items]
Net Cash Provided By (Used In) Operating Activities:		1,876	1,505		1,795
Cash Flows From Investing Activities:
Net payments to affiliates		0	0		0
Additions to property and equipment, including pre-delivery deposits		(15,807)	(4,695)		(13,128)
Proceeds from purchase assignment and leaseback transactions		0	0		0
Proceeds from disposition of property and equipment		0	0		1
Purchases of investments		0	0		0
Sales of investments		0	0		0
Net cash used in investing activities		(15,807)	(4,695)		(13,127)
Cash Flows From Financing Activities:
Long-term borrowings		0
Repayments of long-term debt and capital lease obligations		(12)	0		0
Dividend payments		0	0
Repurchases and conversion of convertible notes					0
Repurchases of common stock		0	0		0
Debt issuance costs		0	0		0
Net payments from affiliates		14,400	2,500		11,033
Other		0	0		0
Net cash used in financing activities		14,388	2,500		11,033
Net increase (decrease) in cash and cash equivalents		457	(690)		(299)
Cash, cash equivalents, and restricted cash—Beginning of Year		7,687	8,377		8,676
Cash, cash equivalents, and restricted cash—End of Year		$ 8,144	$ 7,687		$ 8,377
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Supplemental Financial Inform_3

Supplemental Financial Information (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended												6 Months Ended	12 Months Ended
	Aug. 31, 2017	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017	[1]	Mar. 31, 2017	[1]	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Total operating revenue		$ 697,465	$ 759,087	$ 715,447	$ 665,412	$ 682,604	[1]	$ 716,216	[1]	$ 670,116		$ 606,209			$ 2,837,411	$ 2,675,145	[2]	$ 2,432,413	[2]
Operating income		69,349	115,826	92,928	36,265	96,166	[1]	169,002	[1]	136,840		62,030			314,368	464,038	[2]	397,487	[2]
Nonoperating income (loss)		(27,830)	931	12,859	830	9,899	[1]	(54,113)	[1]	(13,191)		(15,813)			(13,210)	(73,217)	[2]	(36,268)	[2]
Net income		$ 31,636	$ 93,542	$ 79,480	$ 28,542	$ 148,448	[1]	$ 71,622	[1]	$ 76,894		$ 33,645			$ 233,200	$ 330,610	[2],[3],[4]	$ 224,120	[2],[3],[4]
Net Income Per Common Stock Share:
Basic (in dollars per share)		$ 0.65	$ 1.85	$ 1.57	$ 0.56	$ 2.86	[1]	$ 1.35	[1]	$ 1.43		$ 0.63			$ 4.63	$ 6.23	[2]	$ 4.19	[2]
Diluted (in dollars per share)		$ 0.64	$ 1.84	$ 1.56	$ 0.56	$ 2.84	[1]	$ 1.34	[1]	$ 1.43		$ 0.62			$ 4.62	$ 6.19	[2]	$ 4.15	[2]
Settlement and curtailment loss															$ 0	$ 10,384		$ 0
Health Retirement Account And Post-65 Medical Plan
Net Income Per Common Stock Share:
Settlement and curtailment loss	$ 10,400							$ 15,000						$ 10,400
Other
Net Income Per Common Stock Share:
Settlement and curtailment loss						$ (4,600)									$ 0	$ 10,384		$ 0
[1]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[2]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[3]	Amounts adjusted for the adoption of ASC No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.
[4]	Amounts adjusted for the adoption of Accounting Standards Codification (ASC) No. 606, Revenue from Contracts with Customers. See Note 1 to Consolidated Financial Statements for additional information.

Schedule II-Valuation and Qua_2

Schedule II-Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for Doubtful Accounts
Movement in valuation and qualifying accounts
Balance at Beginning of Year	$ 12	$ 34	$ 166
Charged to Costs and Expenses	1,527	1,810	2,896
Charged to Other Accounts	0	0	0
Deductions	(1,485)	(1,832)	(3,028)
Balance at End of Year	54	12	34
Allowance for Obsolescence of Flight Equipment Expendable Parts and Supplies
Movement in valuation and qualifying accounts
Balance at Beginning of Year	21,446	17,358	16,454
Charged to Costs and Expenses	5,463	6,276	3,301
Charged to Other Accounts	0	0	0
Deductions	(4,321)	(2,188)	(2,397)
Balance at End of Year	22,588	21,446	17,358
Valuation Allowance on Deferred Tax Assets
Movement in valuation and qualifying accounts
Balance at Beginning of Year	2,547	1,992	3,912
Charged to Costs and Expenses	0	555	0
Charged to Other Accounts	0	0	0
Deductions	0	0	(1,920)
Balance at End of Year	$ 2,547	$ 2,547	$ 1,992

Uncategorized Items - ha-201812

Label	Element	Value
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (76,074,000)
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0
AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(12,510,000)
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(76,074,000)
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 12,510,000