XML 39 R28.htm IDEA: XBRL DOCUMENT v3.23.2

Hurricane Ian - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 28, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Unusual or Infrequent Item, or Both [Line Items]
Special charges, net of recovery				$ (13,153)	$ 284
Special charges, net of recovery		$ (11,208)	$ 142	(12,820)	$ 284
Hurricane Ian
Unusual or Infrequent Item, or Both [Line Items]
Non-operating special charge	$ 52,100
Special charges, net of recovery				11,300		$ 18,100
Unusual or infrequent item, or both, insurance proceeds				100
Special charges, net of recovery				(11,200)
Insurance recoveries				$ 31,200

X

- Definition

Non-Operating Special Charge

+ References

No definition available.

+ Details

Name:	algt_NonOperatingSpecialCharge
Namespace Prefix:	algt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Special Item - Impairment charges

+ References

No definition available.

+ Details

Name:	algt_SpecialItemImpairmentcharges
Namespace Prefix:	algt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

+ Details

Name:	us-gaap_InsuranceRecoveries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of restructuring charges, remediation cost, and asset impairment loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

+ Details

Name:	us-gaap_RestructuringSettlementAndImpairmentProvisions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of insurance proceeds for an event or transaction that is unusual in nature or infrequent in occurrence, or both.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483613/220-20-50-1

+ Details

Name:	us-gaap_UnusualOrInfrequentItemInsuranceProceeds
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_UnusualOrInfrequentItemLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_UnusualRiskOrUncertaintyByNatureAxis=algt_HurricaneIanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: