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Lines of Credit (Tables)
6 Months Ended
Jan. 31, 2013
Lines of Credit [Abstract]  
Unsecured Lines of Credit
Unsecured lines of credit are summarized in the following table.

January 31,
 2013
July 31,
2012
Cash draws, recorded as lines of credit on the consolidated balance sheet
$
6,758,538
$
12,309,335
Letters of credit
1,577,931
2,615,415
Total amounts drawn under lines of credit 
8,336,469
14,924,750
Remaining amounts available under lines of credit
  26,032,531
  19,444,250
Total approved unsecured lines of credit  
$
34,369,000
$
34,369,000