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Bank segment - Troubled debt restructuring - narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Troubled debt restructurings
Nonaccrual loans with no related allowance	$ 10,652	$ 10,652
Troubled debt restructurings real estate loans
Troubled debt restructurings
Financing receivable modifications minimum, period of payment default of loans determined to be TDRs (in days)	90 days	90 days
Commitments to lend additional funds to borrows with impaired or modified loans	$ 0	$ 0	$ 0
Consumer mortgage loans collateralized by residential real estate property in foreclosure process	$ 3,000	$ 3,000	$ 3,500

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Financial Receivables, Loans Collateralized by Real Estate in Foreclosure

+ References

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- Definition

Represents the minimum period of payment default of loans determined to be troubled debt restructurings.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of financing receivable on nonaccrual status with no allowance for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447

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- Definition

Amount of restructured debt contingently payable based on the occurrence of future events or circumstances.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 60
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6402221&loc=d3e15765-112638

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