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Earnings Per Share - Computation for Earnings Per Share (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net Income	$ 19,555,847	$ 12,942,129
Less: Net income attributable to redeemable noncontrolling interest	(2,623,205)	47,332
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 16,932,642	$ 12,989,461
Weighted average shares outstanding
Weighted average number of outstanding shares - Basic (in shares)	3,493,843	3,487,923
Dilutive impact of restricted stock units (in shares)	2,691	4,015
Weighted average number of outstanding shares - Diluted (in shares)	3,496,534	3,491,938
Earnings per share
Basic (USD per share)	$ 4.85	$ 3.72
Diluted (USD per share)	$ 4.84	$ 3.72

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