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Business Combinations, Goodwill and Intangible Assets (Unaudited Pro Forma Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Business Combinations [Abstract] |  |
Net Interest Income | $ 155,439 | $ 134,129
Non-interest Income | 46,857 | 40,678
Total Revenue | 202,296 | 174,807
Provision for Loan Losses Expense | 5,648 | 2,070
Non-interest Expense | 116,083 | 107,995
Income Before Income Taxes | 80,565 | 64,742
Income Tax Expense | 14,358 | 11,281
Net Income | $ 66,207 | $ 53,461
Earnings Per Share and Diluted Earnings Per Share (in USD per share) | $ 2.48 | $ 2.13

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