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Earnings Per Share (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Computation for earnings per share
Net Income	$ 46,594,132	$ 37,074,497	$ 31,580,931
Less: Net income attributable to redeemable noncontrolling interest	542,209	0	0
Net income attributable to common shareholders	$ 46,051,923	$ 37,074,497	$ 31,580,931
Weighted average number of outstanding shares
Basic (in shares)	3,407,408	3,277,920	3,196,127
Incremental Common Shares Attributable to Dilutive Effect of Nonvested Shares with Forfeitable Dividends	0	74,957	67,453
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	5,983	6,909	2,588
Diluted (in shares)	3,413,391	3,359,786	3,266,168
Earnings per share
Basic (per share)	$ 13.52	$ 11.31	$ 9.88
Diluted (per share)	$ 13.49	$ 11.03	$ 9.67

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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