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Purchased Credit Impaired ("PCI") Loans - Summary of PCI Loans by Category (Details) - Covered Loans $ in Thousands	Mar. 31, 2019 USD ($) rating	Dec. 31, 2018 USD ($) rating
Covered Loans [Line Items]
Recorded Investment PCI Loans	$ 122,503	$ 46,401
Construction and land development
Covered Loans [Line Items]
Weighted- Average Risk Rating1 | rating	6.16	6.03
Recorded Investment PCI Loans	$ 10,481	$ 4,548
CRE - investor owned
Covered Loans [Line Items]
Weighted- Average Risk Rating1 | rating	6.68	7.19
Recorded Investment PCI Loans	$ 42,948	$ 23,939
CRE - owner occupied
Covered Loans [Line Items]
Weighted- Average Risk Rating1 | rating	6.81	7.39
Recorded Investment PCI Loans	$ 35,026	$ 9,669
Residential real estate
Covered Loans [Line Items]
Weighted- Average Risk Rating1 | rating	6.20	6.40
Recorded Investment PCI Loans	$ 16,171	$ 6,082
real estate financing receivable [Domain]
Covered Loans [Line Items]
Recorded Investment PCI Loans	$ 122,239	$ 46,397
Commercial and industrial
Covered Loans [Line Items]
Weighted- Average Risk Rating1 | rating	4.75	6.09
Recorded Investment PCI Loans	$ 17,613	$ 2,159
Consumer and other
Covered Loans [Line Items]
Weighted- Average Risk Rating1 | rating	3.58	2.18
Recorded Investment PCI Loans	$ 264	$ 4

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- Definition

Covered Loans [Line Items]

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+ Details

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- Definition

Aggregate gross carrying amount of loans and leases receivable covered by loss sharing agreements.

+ References

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