XML 145 R35.htm IDEA: XBRL DOCUMENT v3.20.1

Revenue Recognition Passenger Revenue (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Subsequent Event [Line Items]
Contract with Customer, Liability, Forward Bookings		45.00%
Contract with Customer, Liability, Credit Voucher Bookings		55.00%
Revenue, Performance Obligation, Description of Timing		P12M
Increase (Decrease) in Revenue from Contract with Customer		$ 191,600
Contract with Customer, Liability, Current		$ 303,835	$ 249,950
Subsequent Event
Subsequent Event [Line Items]
Credit Voucher Term Expiration	2 years

X

- Definition

Contract with Customer, Liability, Credit Voucher Bookings

+ References

No definition available.

+ Details

Name:	algt_ContractwithCustomerLiabilityCreditVoucherBookings
Namespace Prefix:	algt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Contract with Customer, Liability, Forward Bookings

+ References

No definition available.

+ Details

Name:	algt_ContractwithCustomerLiabilityForwardBookings
Namespace Prefix:	algt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Credit Voucher Term Expiration

+ References

No definition available.

+ Details

Name:	algt_CreditVoucherTermExpiration
Namespace Prefix:	algt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Increase (Decrease) in Revenue from Contract with Customer

+ References

No definition available.

+ Details

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

X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130532-203044

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045

+ Details

Name:	us-gaap_ContractWithCustomerLiabilityCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Description of timing for satisfying performance obligation in contract with customer. Includes, but is not limited to, as services are rendered, and upon shipment, delivery or completion of service.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130554-203045

+ Details

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

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: