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Loans - Summary of Impaired Loans By Loan Portfolio Class (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Allowance: Recorded Investment | $ 1,321 | $ 1,324
Impaired Loans with Allowance: Unpaid Principal Balance | 1,321 | 1,324
Impaired Loans with Allowance: Related Allowance | 928 | 932
Impaired Loans with No Allowance: Recorded Investment | 10,110 | 10,621
Impaired Loans with No Allowance: Unpaid Principal Balance | 10,110 | 10,822
Commercial and industrial |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Allowance: Recorded Investment | 945 | 948
Impaired Loans with Allowance: Unpaid Principal Balance | 945 | 948
Impaired Loans with Allowance: Related Allowance | 595 | 599
Impaired Loans with No Allowance: Recorded Investment | 1,123 | 1,178
Impaired Loans with No Allowance: Unpaid Principal Balance | 1,123 | 1,178
Commercial real estate |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Allowance: Recorded Investment | 0 | 0
Impaired Loans with Allowance: Unpaid Principal Balance | 0 | 0
Impaired Loans with Allowance: Related Allowance | 0 | 0
Impaired Loans with No Allowance: Recorded Investment | 8,617 | 8,764
Impaired Loans with No Allowance: Unpaid Principal Balance | 8,617 | 8,965
Commercial real estate construction |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Allowance: Recorded Investment |  | 0
Impaired Loans with Allowance: Unpaid Principal Balance |  | 0
Impaired Loans with Allowance: Related Allowance |  | 0
Impaired Loans with No Allowance: Recorded Investment |  | 300
Impaired Loans with No Allowance: Unpaid Principal Balance |  | 300
Residential mortgage |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Loans with Allowance: Recorded Investment | 376 | 376
Impaired Loans with Allowance: Unpaid Principal Balance | 376 | 376
Impaired Loans with Allowance: Related Allowance | 333 | 333
Impaired Loans with No Allowance: Recorded Investment | 370 | 379
Impaired Loans with No Allowance: Unpaid Principal Balance | $ 370 | $ 379

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- Definition Amount of allowance for credit losses related to recorded investment. + 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 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 + Details
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