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Note Allowance for loan losses (T D R that subsequently defaulted) (Detail) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 USD ($) loans | Sep. 30, 2017 USD ($) loans | Sep. 30, 2018 USD ($) loans | Sep. 30, 2017 USD ($) loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items] |  |  |  |
Loan count | loans | 159 | 252 | 309 | 538
Recorded investment as of first default date | $ | $ 6,756 | $ 6,705 | $ 14,200 | $ 19,015
CRE non-owner occupied |  |  |  |
Troubled Debt Restructuring, Debtor, Current Period [Line Items] |  |  |  |
Loan count | loans | 0 | 0 | 1 | 2
Recorded investment as of first default date | $ | $ 0 | $ 0 | $ 17 | $ 457
CRE owner occupied |  |  |  |
Troubled Debt Restructuring, Debtor, Current Period [Line Items] |  |  |  |
Loan count | loans | 1 | 0 | 4 | 3
Recorded investment as of first default date | $ | $ 255 | $ 0 | $ 392 | $ 1,749
Commercial and industrial |  |  |  |
Troubled Debt Restructuring, Debtor, Current Period [Line Items] |  |  |  |
Loan count | loans | 1 | 1 | 7 | 4
Recorded investment as of first default date | $ | $ 5 | $ 36 | $ 81 | $ 601
Mortgages |  |  |  |
Troubled Debt Restructuring, Debtor, Current Period [Line Items] |  |  |  |
Loan count | loans | 42 | 48 | 74 | 110
Recorded investment as of first default date | $ | $ 5,280 | $ 4,216 | $ 9,520 | $ 10,112
Credit cards |  |  |  |
Troubled Debt Restructuring, Debtor, Current Period [Line Items] |  |  |  |
Loan count | loans | 86 | 135 | 150 | 274
Recorded investment as of first default date | $ | $ 707 | $ 1,212 | $ 2,301 | $ 2,661
Home equity lines of credit |  |  |  |
Troubled Debt Restructuring, Debtor, Current Period [Line Items] |  |  |  |
Loan count | loans | 1 | 0 | 1 | 1
Recorded investment as of first default date | $ | $ 144 | $ 0 | $ 144 | $ 97
Personal |  |  |  |
Troubled Debt Restructuring, Debtor, Current Period [Line Items] |  |  |  |
Loan count | loans | 27 | 67 | 67 | 138
Recorded investment as of first default date | $ | $ 362 | $ 1,222 | $ 1,656 | $ 3,230
Auto Loan |  |  |  |
Troubled Debt Restructuring, Debtor, Current Period [Line Items] |  |  |  |
Loan count | loans | 0 | 1 | 3 | 5
Recorded investment as of first default date | $ | $ 0 | $ 19 | $ 79 | $ 99
Other |  |  |  |
Troubled Debt Restructuring, Debtor, Current Period [Line Items] |  |  |  |
Loan count | loans | 1 | 0 | 2 | 1
Recorded investment as of first default date | $ | $ 3 | $ 0 | $ 10 | $ 9

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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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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. + References No definition available. + Details
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