XML 45 R35.htm IDEA: XBRL DOCUMENT
v3.23.1

Deposits (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2023
Deposits. |
Schedule of components of deposits | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31,
(dollars in thousands) |  | 2023 |  | 2022
Noninterest-bearing | ​ | $ | 792,977 | ​ | $ | 860,987
Interest-bearing | ​ |  |  | ​ |  |
Interest-bearing demand | ​ |  | 817,675 | ​ |  | 706,275
Savings accounts | ​ |  | 99,742 | ​ |  | 99,882
Money market savings | ​ |  | 1,076,166 | ​ |  | 1,035,981
Time deposits | ​ |  | 245,418 | ​ |  | 212,359
Total interest-bearing | ​ |  | 2,239,001 | ​ |  | 2,054,497
Total deposits | ​ | $ | 3,031,978 | ​ | $ | 2,915,484
​

X
- Definition Tabular disclosure of components of deposits. + References No definition available. + Details
Name: | alrs_ScheduleOfComponentsOfDepositsTableTextBlock
Namespace Prefix: | alrs_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DepositsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration