CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating Activities
Net income	$ 15,429,355	$ 13,910,347
Adjustments to net income:
Provision for bad debt	1,647,291	234,735
Deferred taxes	(459,131)	(95,674)
Stock based compensation	703,894	614,779
Deficient tax benefit from restricted stock	55,598	96,934
Income tax benefit from restricted stock dividends	(31,989)	(32,404)
Depreciation	1,717,676	1,666,838
Changes in operating assets and liabilities:
Accounts receivable	660,373	954,546
Financing receivables	(17,933,266)	(5,020,792)
Inventories	(113,348)	(326,747)
Prepaid expenses and other	168,079	(751,994)
Accounts payable	(135,731)	316,885
Deferred revenue	2,197,633	846,067
Other liabilities	1,499,512	(563,099)
Prepaid income taxes/income taxes payable	1,370,024	(308,679)
Net cash provided by operating activities	6,775,970	11,541,742
Investing Activities
Purchases of property and equipment	(2,747,250)	(1,671,947)
Purchases of investments	(33,481)	(1,072,303)
Net cash used in investing activities	(2,780,731)	(2,744,250)
Financing Activities
Dividends paid	(11,300,445)	(10,178,163)
Deficient tax benefit from restricted stock	(55,598)	(96,934)
Income tax benefit from restricted stock dividends	31,989	32,404
Net cash used in financing activities	(11,324,054)	(10,242,693)
Decrease in cash and cash equivalents	(7,328,815)	(1,445,201)
Cash and cash equivalents at beginning of period	8,912,457	6,664,482
Cash and cash equivalents at end of period	1,583,642	5,219,281
Supplemental disclosure of cash flow information
Cash paid for interest	0	0
Cash paid for income taxes, net of refund	7,092,908	5,755,951
Reclassification of inventory to property and equipment	0	265,741
Write-off of fully depreciated assets	$ 1,222,325	$ 8,687,631