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Mortgage Servicing Rights - Details of Retention and Purchase of MSRs (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized |  |  | $ 36,834 | $ 11,976
Mortgage servicing rights |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | $ 32,463 | $ 11,807 | 51,217 | $ 14,666
Associated Principal | 2,997,971 |  | 4,906,964 |
Mortgage servicing rights | Jumbo MSR Additions |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | 6,174 |  | 8,138 |
Associated Principal | 623,524 |  | 861,521 |
Mortgage servicing rights | Jumbo MSR Additions | Securitization |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | 6,002 |  | 7,874 |
Associated Principal | 607,402 |  | 835,254 |
Mortgage servicing rights | Jumbo MSR Additions | Loan Sales |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | 172 |  | 264 |
Associated Principal | 16,122 |  | 26,267 |
Mortgage servicing rights | Conforming MSR Additions |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | 26,289 |  | 43,079 |
Associated Principal | 2,374,447 |  | 4,045,443 |
Mortgage servicing rights | Conforming MSR Additions | Loan Sales |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | 14,990 |  | 28,701 |
Associated Principal | 1,348,871 |  | 2,701,529 |
Mortgage servicing rights | Conforming MSR Additions | From purchases |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | 11,299 |  | 14,378 |
Associated Principal | $ 1,025,576 |  | $ 1,343,914 |

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- Definition Mortgage Servicing Rights [Line Items] + References No definition available. + Details
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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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