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- Details of Retention and Purchase of MSRs (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Mortgage Servicing Rights [Line Items] |  |  |
MSR Fair Value | $ 64,725 | $ 48,000 | $ 44,063
Mortgage Servicing Rights |  |  |
Mortgage Servicing Rights [Line Items] |  |  |
MSR Fair Value | 95,281 | 95,550 | $ 47,514
Associated Principal | 9,119,764 | 8,672,671 |
Mortgage Servicing Rights | Jumbo Loan |  |  |
Mortgage Servicing Rights [Line Items] |  |  |
MSR Fair Value | 8,554 | 9,006 |
Associated Principal | 915,882 | 1,061,028 |
Mortgage Servicing Rights | Conforming Loan |  |  |
Mortgage Servicing Rights [Line Items] |  |  |
MSR Fair Value | 86,727 | 86,544 |
Associated Principal | 8,203,882 | 7,611,643 |
Mortgage Servicing Rights | Securitizations | Jumbo Loan |  |  |
Mortgage Servicing Rights [Line Items] |  |  |
MSR Fair Value | 8,202 | 8,518 |
Associated Principal | 882,860 | 1,002,235 |
Mortgage Servicing Rights | Loan Sales | Jumbo Loan |  |  |
Mortgage Servicing Rights [Line Items] |  |  |
MSR Fair Value | 352 | 488 |
Associated Principal | 33,022 | 58,793 |
Mortgage Servicing Rights | Loan Sales | Conforming Loan |  |  |
Mortgage Servicing Rights [Line Items] |  |  |
MSR Fair Value | 55,954 | 38,995 |
Associated Principal | 5,251,537 | 3,618,256 |
Mortgage Servicing Rights | Loan Purchases | Conforming Loan |  |  |
Mortgage Servicing Rights [Line Items] |  |  |
MSR Fair Value | 30,773 | 47,549 |
Associated Principal | $ 2,952,345 | $ 3,993,387 |

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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=56950315&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=56950315&loc=d3e122625-111746 + Details
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