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Bank segment (Details 15) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended |  |  |  |  | 3 Months Ended | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 Not designated as a hedging instrument | Dec. 31, 2013 Not designated as a hedging instrument | Sep. 30, 2014 Forward sale contracts | Dec. 31, 2013 Forward sale contracts | Sep. 30, 2014 Forward sale contracts Not designated as a hedging instrument | Dec. 31, 2013 Forward sale contracts Not designated as a hedging instrument | Sep. 30, 2014 Forward sale contracts Not designated as a hedging instrument Mortgage banking income | Sep. 30, 2013 Forward sale contracts Not designated as a hedging instrument Mortgage banking income | Sep. 30, 2014 Forward sale contracts Not designated as a hedging instrument Mortgage banking income | Sep. 30, 2013 Forward sale contracts Not designated as a hedging instrument Mortgage banking income | Sep. 30, 2014 Interest rate lock commitments | Dec. 31, 2013 Interest rate lock commitments | Sep. 30, 2014 Interest rate lock commitments Not designated as a hedging instrument | Dec. 31, 2013 Interest rate lock commitments Not designated as a hedging instrument | Sep. 30, 2014 Interest rate lock commitments Not designated as a hedging instrument Mortgage banking income | Sep. 30, 2013 Interest rate lock commitments Not designated as a hedging instrument Mortgage banking income | Sep. 30, 2014 Interest rate lock commitments Not designated as a hedging instrument Mortgage banking income | Sep. 30, 2013 Interest rate lock commitments Not designated as a hedging instrument Mortgage banking income
Derivative instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | $ 12,707 | $ 26,018 |  |  |  |  |  |  | $ 14,511 | $ 25,070 |  |  |  |  |  |
Fair value |  |  |  |  |  |  | (25) | 139 |  |  |  |  |  |  | 215 | 464 |  |  |  |  |  |
Asset derivative |  |  |  |  | 217 | 629 |  |  | 1 | 141 |  |  |  |  |  |  | 216 | 488 |  |  |  |
Liability derivative |  |  |  |  | 27 | 26 |  |  | 26 | 2 |  |  |  |  |  |  | 1 | 24 |  |  |  |
Net gains (losses) recognized in the Statement of Income | $ 190 | $ (355) | $ (413) | $ 283 |  |  |  |  |  |  | $ (25) | $ (1,173) | $ (164) | $ (273) |  |  |  |  | $ 215 | $ 818 | $ (249) | $ 556

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset against an obligation to return collateral under a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226011-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226006-175313 + Details
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- Definition Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset against a right to receive collateral under a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226011-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226006-175313 + Details
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