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Bank segment - Credit risk profile - summary (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | $ 46,913 | $ 46,035
Accruing loans 90 days or more past due | 0 | 0
Financing Receivable, Modifications, Post-Modification Recorded Investment | 28,625 | 22,246
Residential 1-4 family |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 21,028 | 20,554
Financing Receivable, Modifications, Post-Modification Recorded Investment | 13,803 | 13,962
Commercial real estate |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 3,727 | 1,188
Financing Receivable, Modifications, Post-Modification Recorded Investment | 0 | 0
Home equity line of credit |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 2,801 | 2,254
Financing Receivable, Modifications, Post-Modification Recorded Investment | 2,643 | 2,467
Residential land |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 698 | 970
Financing Receivable, Modifications, Post-Modification Recorded Investment | 3,779 | 4,713
Commercial construction |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 0 | 0
Financing Receivable, Modifications, Post-Modification Recorded Investment | 0 | 0
Residential construction |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 0 | 0
Financing Receivable, Modifications, Post-Modification Recorded Investment | 0 | 0
Commercial loans |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 17,862 | 20,174
Financing Receivable, Modifications, Post-Modification Recorded Investment | 8,400 | 1,104
Consumer loans |  |
Credit risk profile based on nonaccrual loans |  |
Nonaccrual loans | 797 | 895
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 0 | $ 0

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- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Recorded Investment -URI http://asc.fasb.org/extlink&oid=65880944 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524 + Details
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Recorded Investment -URI http://asc.fasb.org/extlink&oid=65880944 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524 + Details
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