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Bank segment - Loan modifications (Details) - Troubled debt restructurings real estate loans $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 USD ($) contract | Jun. 30, 2015 USD ($) contract | Jun. 30, 2016 USD ($) contract | Jun. 30, 2015 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts | contract | 19 | 18 | 36 | 33
Pre-modification outstanding recorded investment | $ 2,236 | $ 1,169 | $ 20,202 | $ 2,567
Post-modification outstanding recorded investment | 2,231 | 1,169 | 20,315 | 2,585
Net increases in ALL | $ 424 | $ 183 | $ 1,184 | $ 285
Residential 1-4 family |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts | contract | 5 | 2 | 9 | 7
Pre-modification outstanding recorded investment | $ 891 | $ 318 | $ 1,988 | $ 1,195
Post-modification outstanding recorded investment | 885 | 318 | 2,100 | 1,213
Net increases in ALL | $ 98 | $ 0 | $ 259 | $ 47
Home equity line of credit |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts | contract | 8 | 13 | 18 | 22
Pre-modification outstanding recorded investment | $ 768 | $ 690 | $ 1,437 | $ 1,119
Post-modification outstanding recorded investment | 768 | 690 | 1,437 | 1,119
Net increases in ALL | $ 181 | $ 105 | $ 255 | $ 160
Residential land |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts | contract | 1 | 0 | 1 | 0
Pre-modification outstanding recorded investment | $ 120 | $ 0 | $ 120 | $ 0
Post-modification outstanding recorded investment | 121 | 0 | 121 | 0
Net increases in ALL | $ 0 | $ 0 | $ 0 | $ 0
Commercial loans |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Number of contracts | contract | 5 | 3 | 8 | 4
Pre-modification outstanding recorded investment | $ 457 | $ 161 | $ 16,657 | $ 253
Post-modification outstanding recorded investment | 457 | 161 | 16,657 | 253
Net increases in ALL | $ 145 | $ 78 | $ 670 | $ 78

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