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Loans and Allowance for Loan Losses Loans and Allowance for Loan Losses, Purchased Credit Impaired Loans (Details) - Financial Asset Acquired with Credit Deterioration - USD ($) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Loans and Allowance for Loan Losses - Purchase Credit Impaired [Line Items] |  |  |
Purchased Loans Contractually Required Principal And Interest | $ 0 | $ 94,312,000 | $ 1,359,000
Purchased Loans Cash Flows Expected To Be Collected | 0 | 48,498,000 | 547,000
Purchased Credit Impaired Loans Acquisition Date Fair Value | $ 0 | $ 48,302,000 | $ 547,000

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- Details
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