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Loans and Allowance for Credit Losses - Troubled Debt Restructurings (Details) number in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 USD ($) Loans | Sep. 30, 2016 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2016 USD ($) Loans | Sep. 30, 2015 USD ($) Loans | Dec. 31, 2015 USD ($)
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Loans and Leases Receivable, Impaired, Commitment to Lend | $ 0 | $ 0 | $ 0 | $ 0 |  |
Number of Loans | Loans | 0 |  |  | 2 |  |
Outstanding Recorded Investment | $ 3,153,000 | 3,153,000 | 3,153,000 | $ 3,153,000 |  | $ 5,623,000
Reserves specific to modified loans | $ 3,000 | 3,000 | $ 3,000 | $ 3,000 |  | $ 1,000
Troubled debt restructuring, write-down |  | 0 |  |  |  |
Defaults on troubled debt restructurings | 0 |  | 0 | 0 | 0 |
Commercial and industrial |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Number of Loans | Loans |  |  |  | 2 | 2 |
Pre-Modification Outstanding Recorded Investment |  | 45,000 |  |  | $ 42,000 |
Principal Modification |  | 0 |  |  | 0 |
Post Modification Outstanding Recorded Investment |  | 45,000 |  |  | 42,000 |
Outstanding Recorded Investment | $ 42,000 | $ 42,000 | $ 42,000 | $ 42,000 | $ 34,000 |

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524 + Details
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