Disclosures about Fair Value of Assets and Liabilities - Reconciliation of Unobservable Inputs (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Derivative liabilities \| Interest Rate Lock Commitments
Reconciliation of significant unobservable inputs, liabilities:
Changes in fair value	$ 80	$ 1
Balance, end of period	80	1
Mortgage servicing rights.
Reconciliation of significant unobservable inputs, assets:
Balance, beginning of period	74,387	77,844
Additions
Originated and purchased servicing	3,929	1,020
Subtractions
Paydowns	(1,858)	(1,110)
Changes in fair value due to changes in valuation inputs or assumptions used in the valuation model	(6,480)	(1,505)
Balance, end of period	69,978	76,249
Derivative assets \| Interest Rate Lock Commitments
Reconciliation of significant unobservable inputs, assets:
Balance, beginning of period	186	70
Subtractions
Changes in fair value	1,893	1
Balance, end of period	$ 2,079	$ 71

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Amount of changes in fair value due to changes in valuation inputs or assumptions used in the valuation model.

+ References

No definition available.

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Amount of originated and purchased servicing classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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No definition available.

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Amount of paydown (repayment) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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No definition available.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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 (c)(1)
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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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 (c)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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-Publisher FASB
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-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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