XML 52 R40.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Borrowed Funds and Mandatorily Redeemable Securities (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Debt Disclosure [Abstract] |
Schedule of long-term debt and mandatorily redeemable securities | The following table shows the details of long-term debt and mandatorily redeemable securities as of December 31, 2021 and 2020.
(Dollars in thousands) |  | 2021 |  | 2020
Federal Home Loan Bank borrowings (0.54% – 5.04%) |  | $ | 44,150 |  |  | $ | 55,183 |
Mandatorily redeemable securities |  | 20,598 |  |  | 20,358 |
Other long-term debt |  | 6,503 |  |  | 6,323 |
Total long-term debt and mandatorily redeemable securities |  | $ | 71,251 |  |  | $ | 81,864 |
Schedule of short-term borrowings | The following table shows the details of short-term borrowings as of December 31, 2021 and 2020.
|  | 2021 |  | 2020
(Dollars in thousands) |  | Amount |  | Weighted Average Rate |  | Amount |  | Weighted Average Rate
Federal funds purchased |  | $ | — |  |  | — | % |  | $ | — |  |  | — | %
Securities sold under agreements to repurchase |  | 194,727 |  |  | 0.05 |  |  | 143,564 |  |  | 0.08 |
Commercial paper |  | 3,967 |  |  | 0.04 |  |  | 4,766 |  |  | 0.13 |
Federal Home Loan Bank advances |  | — |  |  | — |  |  | — |  |  | — |
Other short-term borrowings |  | 1,333 |  |  | — |  |  | 2,311 |  |  | — |
Total short-term borrowings |  | $ | 200,027 |  |  | 0.05 | % |  | $ | 150,641 |  |  | 0.08 | %

X
- Definition Tabular disclosure pertaining to long-term debt and mandatorily redeemable securities. + References No definition available. + Details
Name: | source_ScheduleLongTermDebtAndMandatorilyRedeemableSecuritiesTableTextBlock
Namespace Prefix: | source_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_ScheduleOfShortTermDebtTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration