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Earnings Per Share - Computation for Earnings Per Share (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Net Income	$ 13,125,448	$ 9,279,879
Less: Net income attributable to redeemable noncontrolling interest	(368,553)	(14,216)
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 12,756,895	$ 9,265,663
Weighted average shares outstanding
Basic (in shares)	3,428,888	3,388,743
Dilutive impact of restricted stock units (in shares)	6,441	4,653
Diluted (in shares)	3,435,329	3,393,396
Earnings per share
Basic (USD per share)	$ 3.72	$ 2.73
Diluted (USD per share)	$ 3.71	$ 2.73

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