XML 55 R40.htm IDEA: XBRL DOCUMENT
v3.25.1

Leases (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2025
Leases [Abstract] |
Lease, Cost [Table Text Block] | Operating and finance lease costs and cash flows resulting from these leases are presented below:
| Three Months Ended Mar 31, |
($ in thousands) | 2025 | 2024 |  |
Operating lease costs | $ | 1,702 |  | $ | 1,545 |  |  |
Finance lease costs | 1 |  | 23 |  |  |
Operating lease cash flows | 1,675 |  | 1,844 |  |  |
Finance lease cash flows | 23 |  | 23 |  |  |
Assets And Liabilities, Lessee [Table Text Block] | The right-of-use asset and lease liability by lease classifications on the consolidated balance sheets were as follows:
($ in thousands) | Consolidated Balance Sheets Category | Mar 31, 2025 | Dec 31, 2024
Operating lease right-of-use asset | Premises and equipment | $ | 32,509 |  | $ | 33,202 |
Operating lease liability | Accrued expenses and other liabilities | 34,931 |  | 35,596 |
Finance lease liability | Other long-term funding | 273 |  | 295 |
Lessee, Lease Information [Table Text Block] | The lease payment obligations, weighted-average remaining lease term, and weighted-average original discount rate were as follows:
| Mar 31, 2025 | Dec 31, 2024
($ in thousands) | Lease Payments | Weighted-average Lease Term (in years) | Weighted-average Discount Rate | Lease Payments | Weighted-average Lease Term (in years) | Weighted-average Discount Rate
Operating leases |  |  |  |  |  |
Retail and corporate offices | $ | 37,595 |  | 8.15 | 4.27 | % | $ | 39,072 |  | 8.30 | 4.26 | %
Land | 3,766 |  | 6.48 | 3.81 | % | 3,228 |  | 6.63 | 3.52 | %
Equipment | 204 |  | 1.25 | 4.62 | % | 204 |  | 1.50 | 4.62 | %
Total operating leases | $ | 41,565 |  | 7.96 | 4.23 | % | $ | 42,505 |  | 8.13 | 4.20 | %
Finance leases |  |  |  |  |  |
Retail and corporate offices | $ | 278 |  | 3.00 | 1.32 | % | $ | 301 |  | 3.25 | 1.32 | %
Total finance leases | $ | 278 |  | 3.00 | 1.32 | % | $ | 301 |  | 3.25 | 1.32 | %
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] | Contractual lease payment obligations for each of the next five years and thereafter, in addition to a reconciliation to the Corporation’s lease liability, were as follows:
($ in thousands) | Operating Leases | Finance Leases | Total Leases
Nine months ended December 31, 2025 | $ | 5,121 |  | $ | 69 |  | $ | 5,191 |
2026 | 6,397 |  | 93 |  | 6,490 |
2027 | 5,741 |  | 93 |  | 5,833 |
2028 | 4,998 |  | 23 |  | 5,021 |
2029 | 3,732 |  | — |  | 3,732 |
Beyond 2029 | 15,577 |  | — |  | 15,577 |
Total lease payments | $ | 41,565 |  | $ | 278 |  | $ | 41,843 |
Less: interest | 6,635 |  | 5 |  | 6,640 |
Present value of lease payments | $ | 34,931 |  | $ | 273 |  | $ | 35,203 |

X
- Definition Assets And Liabilities, Lessee [Table Text Block] + References No definition available. + Details
Name: | asb_AssetsAndLiabilitiesLesseeTableTextBlock
Namespace Prefix: | asb_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lessee, Lease Information [Table Text Block] + References No definition available. + Details
Name: | asb_LesseeLeaseInformationTableTextBlock
Namespace Prefix: | asb_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
Name: | us-gaap_LeaseCostTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration