Earnings Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($)		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
NET INCOME		$ 89,505,801	$ 104,280,411
Less: Allocated to participating securities		1,221,016	1,081,933
Net Income available to common shareholders		$ 88,284,785	$ 103,198,478
Basic weighted average shares outstanding (in shares)		246,309,869	257,822,836
Net Income per share - Basic (in dollars per share)	[1]	$ 0.36	$ 0.40
Reallocation of undistributed earnings		$ 4,184	$ 3,813
Net Income available to common shareholders - Diluted		$ 88,288,969	$ 103,202,291
Additional weighted average dilutive common stock equivalents (in shares)		1,306,574	1,282,396
Diluted weighted average shares outstanding (in shares)		247,616,443	259,105,232
Net Income per share - Diluted (in dollars per share)	[1]	$ 0.36	$ 0.40
Shares related to stock plans not included in diluted average common shares outstanding because their effect would be anti-dilutive (in shares)		177,966	1,799,477

[1] ⁽¹⁾ Earnings Per Share has been adjusted to exclude the portion of net income allocated to participating securities as a result of share-based payment awards.