Business Combinations, Goodwill and Intangible Assets (Unaudited Pro Forma Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	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