Fair Value of Financial Instruments - Recurring Level III Assets (Details) - Level III - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 42,417	$ 39,807	$ 38,919	$ 35,172
Realized and unrealized gains (losses) included in earnings	1,547	285	5,678	791
Purchase of securities	20,258	909	20,780	1,359
Unrealized gain included in other comprehensive income (loss)	1,366	2,160	1,645	6,915
Unrealized loss included in other comprehensive income (loss)	(17,793)	(8,424)	(19,227)	(9,609)
Ending balance	47,795	34,628	47,795	34,628
Interest Rate Lock Commitments \| Interest rate lock commitment
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	5,791	2,256	1,660	1,750
Realized and unrealized gains (losses) included in earnings	1,547	285	5,678	791
Purchase of securities	0	0	0	0
Unrealized gain included in other comprehensive income (loss)	0	0	0	0
Unrealized loss included in other comprehensive income (loss)	0	0	0	0
Ending balance	7,338	2,541	7,338	2,541
Municipal Securities \| Municipal Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	36,626	36,801	37,259	33,122
Realized and unrealized gains (losses) included in earnings	0	0	0	0
Purchase of securities	20,258	109	20,780	109
Unrealized gain included in other comprehensive income (loss)	1,366	2,160	1,645	6,915
Unrealized loss included in other comprehensive income (loss)	(17,793)	(8,424)	(19,227)	(9,609)
Ending balance	40,457	30,537	40,457	30,537
Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0	750	0	300
Realized and unrealized gains (losses) included in earnings	0	0	0	0
Purchase of securities	0	800	0	1,250
Unrealized gain included in other comprehensive income (loss)	0	0	0	0
Unrealized loss included in other comprehensive income (loss)	0	0	0	0
Ending balance	$ 0	$ 1,550	$ 0	$ 1,550

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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- Definition

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

+ 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 (c)(1)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
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- Definition

Amount of purchases 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

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-Publisher FASB
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- Definition

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.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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