Per Share Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic Earnings per Share:
NET INCOME	$ 14,593	$ 14,255	$ 12,472	$ 13,064	$ 15,271	$ 15,067	$ 41,320	$ 43,402
Weighted Average Shares Outstanding (in shares)	26,497,398			26,643,064			26,554,369	25,541,843
Basic Earnings per Share (USD per share)	$ 0.55			$ 0.49			$ 1.56	$ 1.70
Diluted Earnings per Share:
NET INCOME	$ 14,593	$ 14,255	$ 12,472	$ 13,064	$ 15,271	$ 15,067	$ 41,320	$ 43,402
Weighted Average Shares Outstanding (in shares)	26,497,398			26,643,064			26,554,369	25,541,843
Potentially Dilutive Shares, Net (in shares)	0			0			0	0
Diluted Weighted Average Shares Outstanding (in shares)	26,497,398			26,643,064			26,554,369	25,541,843
Diluted Earnings per Share (USD per share)	$ 0.55			$ 0.49			$ 1.56	$ 1.70
Anti-dilutive securities excluded from computation of earnings per share (in shares)	0			0			0	0