Earnings Per Share (Schedule of Earnings per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Basic Earnings Per Share
Net Income													$ 23,751	$ 18,864	$ 12,315
Weighted-Average Shares number of common shares, basic													8,575,355	8,394,195	7,360,066
Earnings per share, basic	$ 0.77	$ 0.72	$ 0.67	$ 0.61	$ 0.62	$ 0.63	$ 0.49	$ 0.51	$ 0.20	$ 0.51	$ 0.53	$ 0.44	$ 2.77	$ 2.25	$ 1.67
Net income available and assumed conversions													$ 23,751	$ 18,864	$ 12,315
Weighted-Average Shares, effect of dilutive securities stock option													106,753	149,302	141,993
Weighted-Average Shares income available to common stockholders and assumed conversions, diluted													8,682,108	8,543,497	7,502,059
Earnings per share, diluted	$ 0.77	$ 0.71	$ 0.66	$ 0.60	$ 0.61	$ 0.62	$ 0.48	$ 0.50	$ 0.19	$ 0.50	$ 0.52	$ 0.43	$ 2.74	$ 2.21	$ 1.64