Fair Value Measurements - Valuation and Inputs, at FV (Details) - Recurring $ in Thousands	Sep. 30, 2019 USD ($) item	Dec. 31, 2018 USD ($) $ / shares item
Fair value inputs, quantitative information
Asset, fair value	$ 411,619	$ 325,580
Liabilities, fair value	11,906	4,832
Level 3 inputs
Fair value inputs, quantitative information
Asset, fair value	139,546	129,653
Liabilities, fair value		1,207
Loans, held at fair value \| Level 3 inputs \| Third Party Mark
Fair value inputs, quantitative information
Asset, fair value	$ 20,434	$ 22,664
Debt Instrument, Measurement Input [Extensible List]	Third Party Mark	Third Party Mark
Loans, held at fair value \| Level 3 inputs \| Third Party Mark \| Measurement Input, Share Price \| Minimum
Fair value inputs, quantitative information
Debt instrument, measurement input \| item	99.97	99.41
Loans, held at fair value \| Level 3 inputs \| Third Party Mark \| Measurement Input, Share Price \| Maximum
Fair value inputs, quantitative information
Debt instrument, measurement input \| item	112.70	105.21
Loans, held at fair value \| Level 3 inputs \| Third Party Mark \| Measurement Input, Share Price \| Weighted Average
Fair value inputs, quantitative information
Debt instrument, measurement input \| item	101.81	101.52
MBS \| Level 3 inputs \| Third Party Mark
Fair value inputs, quantitative information
Asset, fair value	$ 30,190	$ 12,033
Debt Instrument, Measurement Input [Extensible List]	Third Party Mark	Third Party Mark
MBS \| Level 3 inputs \| Third Party Mark \| Measurement Input, Share Price \| Minimum
Fair value inputs, quantitative information
Debt instrument, measurement input \| item	65.38	44.65
MBS \| Level 3 inputs \| Third Party Mark \| Measurement Input, Share Price \| Maximum
Fair value inputs, quantitative information
Debt instrument, measurement input \| item	97.00	97.50
MBS \| Level 3 inputs \| Third Party Mark \| Measurement Input, Share Price \| Weighted Average
Fair value inputs, quantitative information
Debt instrument, measurement input	85.00	70.92
MBS \| Level 3 inputs \| Transaction Price
Fair value inputs, quantitative information
Asset, fair value	$ 103	$ 115
Debt Instrument, Measurement Input [Extensible List]	Transaction Price	Transaction Price
MBS \| Level 3 inputs \| Transaction Price \| Measurement Input, Share Price \| Minimum
Fair value inputs, quantitative information
Debt instrument, measurement input \| item	99.00	99.00
MBS \| Level 3 inputs \| Transaction Price \| Measurement Input, Share Price \| Maximum
Fair value inputs, quantitative information
Debt instrument, measurement input \| item	99.00	99.00
MBS \| Level 3 inputs \| Transaction Price \| Measurement Input, Share Price \| Weighted Average
Fair value inputs, quantitative information
Debt instrument, measurement input	99.00	99.00
Interest-Only-Strips \| Level 3 inputs
Fair value inputs, quantitative information
Asset, fair value	$ 400
Mortgage servicing rights \| Level 3 inputs \| Discounted Cash Flow
Fair value inputs, quantitative information
Asset, fair value	$ 84,638	$ 93,065
Debt Instrument, Measurement Input [Extensible List]	Discounted Cash Flow	Discounted Cash Flow
Contingent Consideration \| Level 3 inputs \| Discounted Cash Flow
Fair value inputs, quantitative information
Asset, fair value		$ 1,207
Debt Instrument, Measurement Input [Extensible List]		Discounted Cash Flow

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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+ References

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14210-108612

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+ References

No definition available.

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