Stock-Based Compensation (Details 1) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of the restricted stock transactions
Shares, Non-vested and Outstanding, Beginning	109,176	96,639	103,262
Shares, Granted	72,985	63,811	48,780
Shares, Vested	(51,021)	(49,493)	(54,598)
Shares, Forfeited	(2,916)	(1,781)	(805)
Shares, Non-vested and Outstanding, Ending	128,224	109,176	96,639
Weighted Average Grant Date Fair Value, Outstanding	$ 40.87	$ 44.85	$ 43.73
Weighted Average Grant Date Fair Value, Granted	31.18	37.37	44.20
Weighted Average Grant Date Fair Value, Vested	42.66	43.98	42.13
Weighted Average Grant Date Fair Value, Forfeited	40.30	45.39	46.23
Weighted Average Grant Date Fair Value, Non-vested and outstanding	$ 34.66	$ 40.87	$ 44.85
Weighted average remaining contractual life (in years)	2 years 2 months 12 days