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Details of Retention and Purchase of MSRs (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Fair Value |  |  | $ 30,962 | $ 41,128
Mortgage Servicing Rights |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Fair Value | 61,606 | 16,676 | 76,272 | 45,291
Associated Principal | 5,365,350 |  | 6,835,123 |
Mortgage Servicing Rights | Jumbo MSR Additions |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Fair Value | 4,356 |  | 7,030 |
Associated Principal | 516,004 |  | 831,998 |
Mortgage Servicing Rights | Jumbo MSR Additions | Securitization |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Fair Value | 4,356 |  | 6,542 |
Associated Principal | 516,004 |  | 773,205 |
Mortgage Servicing Rights | Jumbo MSR Additions | Loan Sales |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Fair Value |  |  | 488 |
Associated Principal |  |  | 58,793 |
Mortgage Servicing Rights | Conforming MSR Additions |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Fair Value | 57,250 |  | 69,242 |
Associated Principal | 4,849,346 |  | 6,003,125 |
Mortgage Servicing Rights | Conforming MSR Additions | Loan Sales |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Fair Value | 14,630 |  | 23,933 |
Associated Principal | 1,352,122 |  | 2,232,559 |
Mortgage Servicing Rights | Conforming MSR Additions | From purchases |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSR Fair Value | 42,620 |  | 45,309 |
Associated Principal | $ 3,497,224 |  | $ 3,770,566 |

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- Definition Amount of additions from purchases, assumption or transfer to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122739-111746 + Details
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- Definition The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746 + Details
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