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Earnings Per Share - Computation for Earnings Per Share (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net Income	$ 14,157,569	$ 14,898,023	$ 33,713,416	$ 27,840,151
Less: Net income attributable to redeemable noncontrolling interest	(962,417)	(527,655)	(3,585,622)	(480,323)
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 13,195,152	$ 14,370,368	$ 30,127,794	$ 27,359,828
Weighted average shares outstanding
Weighted average number of outstanding shares - Basic (in shares)	3,478,307	3,518,665	3,486,032	3,503,379
Dilutive impact of restricted stock units (in shares)	0	1,151	472	1,757
Weighted average number of outstanding shares - Diluted (in shares)	3,478,307	3,519,816	3,486,504	3,505,136
Earnings per share
Basic (USD per share)	$ 3.79	$ 4.08	$ 8.64	$ 7.81
Diluted (USD per share)	$ 3.79	$ 4.08	$ 8.64	$ 7.81

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