Statements of Stockholders' Equity - USD ($)	Class A Common Stock	Class C Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock	Total
Balance at Dec. 31, 2013	$ 23,614,574	$ 2,660,382	$ 23,215,875	$ 1,218,396	$ 39,666,587	$ (2,624,625)	$ 87,751,189
Net earnings					2,762,911		2,762,911
Other comprehensive income				923,000			923,000
Grant of stock options			128,526				128,526
Exercise of stock options	69,910		(19,611)				50,299
Sale of treasury stock			147,542			243,590	391,132
Stock Dividends	3,446	(1)	4,910		(8,355)
Conversion Class C to Class A	1,778	(1,776)	(2)
Balance at Jun. 30, 2014	23,689,708	2,658,605	23,477,240	2,141,396	42,421,143	(2,381,035)	92,007,057
Balance at Dec. 31, 2014	24,918,480	2,788,138	25,931,119	1,438,566	44,101,252	(2,086,454)	97,091,101
Net earnings					5,715,982		5,715,982
Other comprehensive income				1,892,537			1,892,537
Grant of stock options			211,476				211,476
Exercise of stock options	27,148	228,046	6,366			(244,009)	17,551
Sale of treasury stock			291,133			240,022	531,155
Stock Dividends	480	2	728		(1,210)
Conversion Class C to Class A	1,064	(1,064)
Balance at Jun. 30, 2015	$ 24,947,172	$ 3,015,122	$ 26,440,822	$ 3,331,103	$ 49,816,024	$ (2,090,441)	$ 105,459,802