Mortgage Servicing - Schedule of Components of Servicing and Subservicing Fees (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Transfers and Servicing [Abstract]
Servicing	$ 274,089	$ 331,794	$ 879,098	$ 1,039,033	$ 1,363,800	$ 1,246,882	$ 535,415
Subservicing	14,354	30,926	72,968	95,509	128,797	146,605	45,713
Servicing and Subservicing fees, total	288,443	362,720	952,066	1,134,542	1,492,597	1,393,487	581,128
Home Affordable Modification Program (HAMP) fees	32,318	37,644	108,698	111,000	141,121	152,812	76,764
Late charges	19,162	27,634	63,557	97,002	121,618	115,826	69,281
Loan collection fees	6,682	8,655	25,176	25,573	33,983	31,022	15,960
Custodial accounts (float earnings)	836	1,831	4,633	5,235	6,693	5,332	3,749
Other	12,576	27,480	49,411	74,744	98,163	125,080	57,525
Fees, total	$ 360,017	$ 465,964	$ 1,203,541	$ 1,448,096	$ 1,894,175	$ 1,823,559	$ 804,407

All amounts that, per contract, are due in exchange for servicing or subservicing the financial asset.

No definition available.

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- Definition

All amounts that, per contract, are due to the subservicer in exchange for subservicing the financial asset and would no longer be received by a subservicer if the owners of the servicing rights were to exercise their authority under the contract to shift the subservicing to another servicer.

+ References

No definition available.

+ Details

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- Definition

Represents amount related to interest earned on unremitted loan payments held in custodial accounts, are due to the servicer in exchange for servicing the financial asset.

+ References

No definition available.

+ Details

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- Definition

Represents loan collection fees paid by the borrower to the servicer for automated payment services.

+ References

No definition available.

+ Details

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- Definition

Represents fees related to a specific loan modification program due to the servicer in exchange for servicing the financial asset.

+ References

No definition available.

+ Details

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- Definition

All amounts that are due to the servicer of a financial asset, excluding contractually specified servicing fees and late fees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122596-111746

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- Definition

All amounts that, per contract, are due to the servicer in exchange for servicing the financial asset and would no longer be received by a servicer if the beneficial owners of the serviced assets (or their trustees or agents) were to exercise their actual or potential authority under the contract to shift the servicing to another servicer. Depending on the servicing contract, those fees may include some or all of the difference between the interest rate collected on the asset being serviced and the rate to be paid to the beneficial owners of the asset.

+ References

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- Definition

The total amount of contractually specified servicing fees, late fees, and ancillary fees earned for each period for which results of operations are presented.

+ References

+ Details

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- Definition

All amounts that are due to the servicer of a financial asset as a result of the debt holder not meeting the monthly payment terms.

+ References

+ Details

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- References

No definition available.

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