Reconciliation of Segment Operating Income (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Reconciliation Of Segment Operating Income Details
Total operating income									$ 7,394,461	$ 5,879,096
Interest expense, net									473,486	350,334
Other expense, net									118,250	34,871
Consolidated income before taxes									6,802,725	5,493,891
Net income	$ 689,000	$ 1,189,000	$ 2,543,000	$ 368,000	$ 524,000	$ 959,000	$ 2,211,000	$ 309,000	$ 4,789,005	$ 4,002,905