Condensed Statements Of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Condensed Statements Of Comprehensive Income [Abstract]
NET INCOME	$ 4,242,480	$ 4,017,711	$ 7,814,238	$ 7,708,557
Defined benefit pension plan:
Amortization of prior service cost included in net periodic pension cost	4,367	4,368	8,734	8,735
Amortization of net loss included in net periodic pension cost		165,884		331,768
Total other comprehensive income	4,367	170,252	8,734	340,503
TOTAL COMPREHENSIVE INCOME	$ 4,246,847	$ 4,187,963	$ 7,822,972	$ 8,049,060