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Earnings Per Share - Computation for Earnings Per Share (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net Income	$ 13,668,965	$ 6,728,460	$ 32,715,951	$ 25,419,204
Less: Net income attributable to redeemable noncontrolling interest	(242,401)	0	(309,172)	0
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 13,426,564	$ 6,728,460	$ 32,406,779	$ 25,419,204
Weighted average shares outstanding
Basic (in shares)	3,413,164	3,297,337	3,405,460	3,268,037
Dilutive impact of restricted stock grants with forfeitable rights to dividends (in shares)	0	74,154	0	74,267
Dilutive impact of restricted stock units (in shares)	6,959	7,709	4,748	5,892
Diluted (in shares)	3,420,123	3,379,200	3,410,208	3,348,196
Earnings per share
Basic (USD per share)	$ 3.93	$ 2.04	$ 9.52	$ 7.78
Diluted (USD per share)	$ 3.93	$ 1.99	$ 9.50	$ 7.59

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