Pension and Equity Incentive Plans (Summary of Stock Option Activity) (Details) - $ / shares	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Pension and Equity Incentive Plans [Abstract]
Outstanding, Beginning Balance - Number of Options	1,200,975	1,104,600	1,104,600
Options Forfeited - Number of Options
Options Exercised - Number of Options	(500)
Options Granted - Number of Options
Options Expired - Number of Options
Outstanding, Ending Balance - Number of Options	1,200,475	1,104,600	1,200,975	1,104,600
Outstanding, Range of Exercise Price, Lower Range Limit (per share)	$ 8.93	$ 8.93	$ 8.93	$ 8.93
Outstanding, Range of Exercise Price, Upper Range Limit (per share)	13.32	13.32	13.32	13.32
Options Exercised - Exercise Price	10.55
Outstanding Number of Options, Beginning Balance - Weighted Average Exercise Price	11.45	11.36	11.36
Number of Options, Exercised - Weighted Average Exercise Price	10.55
Outstanding Number of Options, Ending Balance - Weighted Average Exercise Price	$ 11.45	$ 11.36	$ 11.45	$ 11.36