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Loan Servicing - Unpaid Principal Balance of Serviced Mortgage Loans for Others (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Balance, end of period | $ 119,922 | $ 133,107 | $ 136,525
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Balance, end of period | 13,325 | 16,755 | 23,832
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Balance, end of period | $ 106,597 | $ 116,352 | $ 112,693

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- Definition Total carrying amount of mortgage loans as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 29 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29.6) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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