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Loans Receivable and Allowance for Loan Losses (Schedule of Troubled Debt Restructurings) (Detail) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 USD ($) SecurityLoan | Mar. 31, 2016 USD ($) SecurityLoan
Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Loans | SecurityLoan | 3 | 0
Pre-Modification Outstanding Recorded Investment | $ 1,002 | $ 0
Post-Modification Outstanding Recorded Investment | $ 988 | $ 0
Residential [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Loans | SecurityLoan | 3 | 0
Pre-Modification Outstanding Recorded Investment | $ 1,002 | $ 0
Post-Modification Outstanding Recorded Investment | $ 988 | $ 0
Commercial Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Loans | SecurityLoan | 1 | 0
Pre-Modification Outstanding Recorded Investment | $ 292 | $ 0
Post-Modification Outstanding Recorded Investment | $ 284 | $ 0
Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Loans | SecurityLoan | 2 | 0
Pre-Modification Outstanding Recorded Investment | $ 240 | $ 0
Post-Modification Outstanding Recorded Investment | $ 234 | $ 0
Restructured Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Number of Loans | SecurityLoan | 6 | 0
Pre-Modification Outstanding Recorded Investment | $ 1,534 | $ 0
Post-Modification Outstanding Recorded Investment | $ 1,506 | $ 0

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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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- 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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