v2.4.0.6
Valuation and Qualifying Accounts (Detail) - Valuation and Qualifying Accounts (USD $)
 12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Allowance for Doubtful Accounts [Member]
      
Balance at beginning of period $ 1,045,122 $ 1,379,671 $ 1,058,539
Charged to costs and expenses 10,000 195,747 262,575
Deductions 48,433 [1] 530,296 [1] (58,557) [1]
Balance at end of period 1,006,689 1,045,122 1,379,671
Reserves for Claims Payable as Self Insurer [Member]
      
Balance at beginning of period 14,334,276 11,925,047 9,489,175
Charged to costs and expenses 12,252,489 14,966,351 14,681,377
Deductions 15,243,696 [2] 12,557,122 [2] 12,245,505 [2]
Balance at end of period $ 11,343,069 $ 14,334,276 $ 11,925,047
[1] Represents accounts receivable net write-offs.
[2] Represents claims paid.