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Loans Modified as Troubled Debt Restructurings by Type of Concession Made and Loan Class (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) Contract | Dec. 31, 2015 USD ($) Contract
Financing Receivable, Modifications [Line Items] |  |
Total Contracts | Contract | 1 | 5
Pre-Modification Recorded Investment | $ 115 | $ 342
Post-Modification Recorded Investment | $ 115 | $ 342
Below Market Interest Rate And Extended Payment Term | Single Family Owner Occupied |  |
Financing Receivable, Modifications [Line Items] |  |
Total Contracts | Contract | 1 | 5
Pre-Modification Recorded Investment | $ 115 | $ 342
Post-Modification Recorded Investment | $ 115 | $ 342

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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=66008989&loc=SL6953676-111524 + Details
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- Definition Post-modification amount of investment in financing receivables 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=66008989&loc=SL6953676-111524 + Details
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- Definition Pre-modification amount of investment in financing receivables 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=66008989&loc=SL6953676-111524 + Details
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