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Bank segment - Troubled debt restructuring that subsequently defaulted (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) contract	Jun. 30, 2017 USD ($) contract	Jun. 30, 2018 USD ($) contract	Jun. 30, 2017 USD ($) contract
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	2	1	3	2
Recorded investment | $	$ 391	$ 222	$ 472	$ 523
Residential 1-4 family
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	1	0	2
Recorded investment | $	$ 0	$ 222	$ 0	$ 523
Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0	0	0
Recorded investment | $	$ 0	$ 0	$ 0	$ 0
Home equity line of credit
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	1	0	2	0
Recorded investment | $	$ 100	$ 0	$ 181	$ 0
Residential land
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0	0	0
Recorded investment | $	$ 0	$ 0	$ 0	$ 0
Commercial construction
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0	0	0
Recorded investment | $	$ 0	$ 0	$ 0	$ 0
Residential construction
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0	0	0
Recorded investment | $	$ 0	$ 0	$ 0	$ 0
Commercial loans
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	1	0	1	0
Recorded investment | $	$ 291	$ 0	$ 291	$ 0
Consumer loans
Financing Receivable, Modifications [Line Items]
Number of contracts | contract	0	0	0	0
Recorded investment | $	$ 0	$ 0	$ 0	$ 0

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- Definition

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