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Business Combinations - Summary of Acquired Loans (Details) - ColoEast Bankshares, Inc. $ in Thousands	Aug. 01, 2016 USD ($)
Business Acquisition [Line Items]
Acquired loans at acquisition	$ 460,775
Non-Purchase Credit Impaired Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	441,482
PCI Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	19,293
Commercial real estate
Business Acquisition [Line Items]
Acquired loans at acquisition	97,476
Commercial real estate | Non-Purchase Credit Impaired Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	86,569
Commercial real estate | PCI Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	10,907
Construction, land development, land
Business Acquisition [Line Items]
Acquired loans at acquisition	61,651
Construction, land development, land | Non-Purchase Credit Impaired Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	58,718
Construction, land development, land | PCI Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	2,933
1-4 family residential properties
Business Acquisition [Line Items]
Acquired loans at acquisition	36,503
1-4 family residential properties | Non-Purchase Credit Impaired Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	36,412
1-4 family residential properties | PCI Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	91
Farmland
Business Acquisition [Line Items]
Acquired loans at acquisition	101,210
Farmland | Non-Purchase Credit Impaired Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	100,977
Farmland | PCI Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	233
Commercial
Business Acquisition [Line Items]
Acquired loans at acquisition	156,734
Commercial | Non-Purchase Credit Impaired Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	151,605
Commercial | PCI Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	5,129
Factored receivables
Business Acquisition [Line Items]
Acquired loans at acquisition	694
Factored receivables | Non-Purchase Credit Impaired Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	694
Consumer
Business Acquisition [Line Items]
Acquired loans at acquisition	6,507
Consumer | Non-Purchase Credit Impaired Loans
Business Acquisition [Line Items]
Acquired loans at acquisition	$ 6,507

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Fair value at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 15
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

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