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Purchased Credit Impaired ("PCI") Loans - Summary of PCI Loans by Category (Details) - Covered Loans $ in Thousands	Mar. 31, 2017 USD ($) rating	Dec. 31, 2016 USD ($) rating
Covered Loans [Line Items]
Recorded Investment PCI Loans	$ 88,383	$ 39,769
Construction and land development
Covered Loans [Line Items]
Weighted- Average Risk Rating1 | rating	6.18	5.80
Recorded Investment PCI Loans	$ 12,914	$ 4,365
Commercial Real Estate Investor Owned
Covered Loans [Line Items]
Weighted- Average Risk Rating1 | rating	7.00	6.95
Recorded Investment PCI Loans	$ 42,532	$ 8,162
CRE - owner occupied
Covered Loans [Line Items]
Weighted- Average Risk Rating1 | rating	6.47	6.39
Recorded Investment PCI Loans	$ 13,580	$ 11,863
Residential real estate
Covered Loans [Line Items]
Weighted- Average Risk Rating1 | rating	6.06	5.64
Recorded Investment PCI Loans	$ 14,943	$ 11,792
Total real estate loans
Covered Loans [Line Items]
Recorded Investment PCI Loans	$ 83,969	$ 36,182
Commercial and industrial
Covered Loans [Line Items]
Weighted- Average Risk Rating1 | rating	5.84	5.87
Recorded Investment PCI Loans	$ 4,335	$ 3,523
Consumer and other
Covered Loans [Line Items]
Weighted- Average Risk Rating1 | rating	3.50	1.64
Recorded Investment PCI Loans	$ 79	$ 64

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- Definition

Covered Loans [Line Items]

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- Definition

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

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