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Other Assets and Liabilities - Components of MSR income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Servicing income	$ 4,004	$ 3,872	$ 11,601	$ 17,290
Cost of sub-servicer	(324)	(476)	(1,254)	(2,515)
Net servicing fee income	3,680	3,396	10,347	14,775
Market valuation changes of MSRs	(823)	(1,351)	1,324	(10,842)
Market valuation changes of associated derivatives	(890)	(422)	(7,151)	1,869
MSR reversal of provision for repurchases	0	(8)	277	304
MSR Income, Net	$ 1,967	$ 1,615	$ 4,797	$ 6,106

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- Definition

Market Valuation Changes In Associated Derivatives

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No definition available.

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- Definition

Mortgage Servicing Expense

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No definition available.

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- Definition

Includes income from mortgage banking servicing real estate mortgages, net of subservicing costs, and market valuation changes of MSRs held at fair value.

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No definition available.

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- Definition

Provision For Mortgage Servicing Rights Repurchases

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No definition available.

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- Definition

Total net change in market value related to mortgage servicing rights.

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No definition available.

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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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122596-111746

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- Definition

Amount of contractually specified servicing fee, late fee, and ancillary fee recognized as income for servicing asset and servicing liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122596-111746

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- References

No definition available.

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