The percentage of total lesseee's that have received accommodation arrangements.

No definition available.

Name:	al_LessorLeaseAccommodationArrangementsPercentage
Namespace Prefix:	al_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	duration

- Definition

Aggregate dividends declared during the period for each share of preferred stock outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
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- 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

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Period Type:	duration

- Details

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- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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Subsequent Events (Details) - $ / shares		3 Months Ended
Subsequent Events (Details) - $ / shares	May 06, 2020	Mar. 31, 2020	Mar. 31, 2019
Subsequent Events
Quarterly cash dividends on common stock		$ 0.15	$ 0.13
Accommodation arrangement percentage of lessees		46.00%
Subsequent Event \| Class A Common Stock
Subsequent Events
Quarterly cash dividends on common stock	$ 0.15
Subsequent Event \| Series A Preferred Stock
Subsequent Events
Dividend declared per share of Series A preferred stock	$ 0.384375