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Mortgage Servicing - Schedule of Activity Related to MSRs - Fair Value Method (Details) (USD $) In Thousands, unless otherwise specified |  |  | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2014 Conventional [Member] | Sep. 30, 2013 Conventional [Member]
Servicing Asset at Fair Value, Amount [Roll Forward] |  |  |  |  |  |
Beginning balance | $ 101,948 | $ 116,029 | $ 116,029 |  | $ 85,213 |
Servicing transfers |  |  | (934) |  | 0 |
Changes in fair value |  |  |  |  |  |
Changes in assumptions |  |  | (12,217) | [1] | 19,800 | [1]
Realization of cash flows and other changes |  |  | (930) | [1] | (8,075) | [1]
Ending balance | $ 101,948 | $ 116,029 | $ 101,948 |  | $ 96,938 |
[1] | Changes in fair value are recognized in Servicing and origination expense in the unaudited Consolidated Statements of Operations.

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- Definition The net increase or decrease in fair value as a result of changes in the assumptions or model used to calculate the fair value of servicing 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 -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746 + Details
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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + 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)(1) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746 + Details
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- Definition Decrease in servicing assets subsequently measured at fair value resulting from conveyance of servicing rights to unrelated parties. + 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)(3) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746 + Details
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- Definition The net Increase or Decrease in fair value as a result of other changes that are not additions, disposals, or a result of change in the inputs, assumptions, or model used to calculate the fair value of servicing 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)(4)(ii) -URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746 + Details
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