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Management Common Stock Loan Program (Details) - USD ($)
shares in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
May. 31, 2004
Mar. 02, 2013
Aug. 31, 2001
Jun. 30, 2006
Management Common Stock Loan Program [Line Items]        
Interest rate     9.40%  
Management Common Stock Loan Program [Member]        
Management Common Stock Loan Program [Line Items]        
Shares of common stock purchased by management stock loan participants     3,825  
Cost of loan to purchase stock $ 7,600,000   $ 33,600,000  
Number of shares held, elected to accept extension and place into escrow account       3,500
Percent of shares held, elected to accept extension and place into escrow account       94.00%
Share-based compensation expense   $ 500,000    
Management Common Stock Loan Program [Member] | May 2004 Modification [Member]        
Management Common Stock Loan Program [Line Items]        
Cost of loan to purchase stock $ 0