Statements of Cash Flows (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Membership redemptions payable	$ 2,418,269	$ 2,681,275	$ 2,247,341
Membership contributions received in advance of admission date	$ 3,164,000	$ 521,391	$ 1,083,380