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Loans - Troubled Debt Restructurings, Disaggregated by Loan Class (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2014 SecurityLoan | Mar. 31, 2013 SecurityLoan
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 7 | 4
Pre-Modification Outstanding Recorded Investment | $ 2,022 | $ 1,789
Post-Modification Outstanding Recorded Investment | 1,973 | 1,635
Real estate loans [Member] | Other [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 1 |
Pre-Modification Outstanding Recorded Investment | 943 |
Post-Modification Outstanding Recorded Investment | 943 |
Commercial and industrial loans [Member] | Commercial term [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 5 | 2
Pre-Modification Outstanding Recorded Investment | 829 | 205
Post-Modification Outstanding Recorded Investment | 788 | 205
Commercial and industrial loans [Member] | Commercial lines of credit [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 1 |
Pre-Modification Outstanding Recorded Investment | 250 |
Post-Modification Outstanding Recorded Investment | 242 |
Commercial and industrial loans [Member] | International loans [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans |  | 2
Pre-Modification Outstanding Recorded Investment |  | 1,584
Post-Modification Outstanding Recorded Investment |  | $ 1,430

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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=28368275&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=28368275&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=28368275&loc=SL6953676-111524 + Details
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