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Loans and Allowance for Loan Losses - Loan Risk Rating (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | $ 1,840,569 | $ 1,777,239
Commercial Real Estate [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 888,942 | 860,027
Consumer Real Estate [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 410,981 | 407,254
Construction and Land Development [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 187,009 | 187,895
Commercial and Industrial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 341,471 | 308,254
Consumer and Other [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 12,166 | 13,809
Non PCI Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,807,701 | 1,743,081
Non PCI Loans [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,789,448 | 1,728,896
Non PCI Loans [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 14,304 | 10,758
Non PCI Loans [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,327 | 309
Non PCI Loans [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 2,614 | 2,915
Non PCI Loans [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 8 | 203
Non PCI Loans [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 871,643 | 842,345
Non PCI Loans [Member] | Commercial Real Estate [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 863,455 | 834,912
Non PCI Loans [Member] | Commercial Real Estate [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 7,547 | 6,791
Non PCI Loans [Member] | Commercial Real Estate [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Non PCI Loans [Member] | Commercial Real Estate [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 641 | 642
Non PCI Loans [Member] | Commercial Real Estate [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Non PCI Loans [Member] | Consumer Real Estate [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 402,835 | 398,542
Non PCI Loans [Member] | Consumer Real Estate [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 400,139 | 394,728
Non PCI Loans [Member] | Consumer Real Estate [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,775 | 2,678
Non PCI Loans [Member] | Consumer Real Estate [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 15 | 14
Non PCI Loans [Member] | Consumer Real Estate [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 906 | 1,122
Non PCI Loans [Member] | Consumer Real Estate [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Non PCI Loans [Member] | Construction and Land Development [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 182,339 | 183,293
Non PCI Loans [Member] | Construction and Land Development [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 180,904 | 182,524
Non PCI Loans [Member] | Construction and Land Development [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 623 | 64
Non PCI Loans [Member] | Construction and Land Development [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 157 | 158
Non PCI Loans [Member] | Construction and Land Development [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 655 | 547
Non PCI Loans [Member] | Construction and Land Development [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Non PCI Loans [Member] | Commercial and Industrial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 339,171 | 305,697
Non PCI Loans [Member] | Commercial and Industrial [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 333,423 | 303,805
Non PCI Loans [Member] | Commercial and Industrial [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 4,228 | 1,090
Non PCI Loans [Member] | Commercial and Industrial [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,155 | 137
Non PCI Loans [Member] | Commercial and Industrial [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 357 | 462
Non PCI Loans [Member] | Commercial and Industrial [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 8 | 203
Non PCI Loans [Member] | Consumer and Other [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 11,713 | 13,204
Non PCI Loans [Member] | Consumer and Other [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 11,527 | 12,927
Non PCI Loans [Member] | Consumer and Other [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 131 | 135
Non PCI Loans [Member] | Consumer and Other [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Non PCI Loans [Member] | Consumer and Other [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 55 | 142
Non PCI Loans [Member] | Consumer and Other [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 32,868 | 34,158
Purchased Credit Impaired Loans [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 24,527 | 26,623
Purchased Credit Impaired Loans [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 4,449 | 3,147
Purchased Credit Impaired Loans [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,459 | 1,536
Purchased Credit Impaired Loans [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 2,433 | 2,852
Purchased Credit Impaired Loans [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 17,299 | 17,682
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 12,825 | 14,050
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 2,736 | 1,805
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,010 | 1,030
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 728 | 797
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 8,146 | 8,712
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 5,555 | 5,617
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 581 | 756
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 440 | 446
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,570 | 1,893
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 4,670 | 4,602
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 3,554 | 4,033
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,116 | 569
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 2,300 | 2,557
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 2,196 | 2,382
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 50
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 104 | 125
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 0 | 0
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 453 | 605
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 397 | 541
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 16 | 17
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 9 | 10
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 31 | 37
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | $ 0 | $ 0

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