Shareholders' Equity - Schedule of Amount Received in Connection with DRIP (Details) - USD ($)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Amounts Received	[1]	$ 35,113,713	$ 60,365,190	$ 22,400,945
Dividend Reinvestment Stock Purchase Plan [Member]
Class of Stock [Line Items]
Amounts Received		35,113,713	60,365,190	22,400,945
Less: Dividends Reinvested		(5,075,547)	(2,859,174)	(2,388,552)
Amounts Received, net		$ 30,038,166	$ 57,506,016	$ 20,012,393
Number of Shares Issued		2,654,846	4,095,357	1,966,133

[1] Dividend Reinvestment and Stock Purchase Plan.