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Fair Value - Changes in Fair Value Levels and in Level 3 Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair value
Amount of transfers between hierarchy levels	$ 0	$ 0	$ 0	$ 0
Visa derivative | Visa Derivative
Changes in Level 3 liabilities measured at fair value on a recurring basis
Balance	(2,132)	(2,095)	(4,554)	(4,233)
Total net (losses) gains included in other noninterest income	(49)	22	(46)	131
Settlements	1,329	1,153	3,748	3,182
Balance	(852)	(920)	(852)	(920)
Total net (losses) gains included in net income attributable to the change in unrealized gains or losses related to liabilities still held	$ (49)	$ 22	$ (46)	$ 131

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Amount of transfers between hierarchy levels for the period.

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- Definition

Amount of unrealized gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3) and still held.

+ 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 (d)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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Amount of settlements 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
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-Section 50
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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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-Section 50
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