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Commitments and Contingencies - Loss Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
 7 Months Ended 1 Months Ended 1 Months Ended
Jan. 31, 2008
Materially Misstated Financial Statements
officers
Jun. 30, 2011
Criminal
Materially Misstated Financial Statements
Jun. 30, 2011
Civil
Materially Misstated Financial Statements
Jan. 31, 2012
Officer, Flood
Criminal
Materially Misstated Financial Statements
Jun. 30, 2010
Officer, Flood
Criminal
Materially Misstated Financial Statements
Jul. 31, 2009
Officer, Flood
Criminal
Materially Misstated Financial Statements
Feb. 28, 2009
Officer, Flood
Criminal
Materially Misstated Financial Statements
counts
Aug. 31, 2009
Officer, Strohm
Materially Misstated Financial Statements
Jun. 30, 2010
Officer, Strohm
Criminal
Materially Misstated Financial Statements
Feb. 28, 2009
Officer, Strohm
Criminal
Materially Misstated Financial Statements
counts
Jul. 31, 2009
Flood [Member]
Counterclaims [Member]
Loss Contingencies                      
Number of officers 2                    
Loss contingency, number of convicted counts             9     1  
Prison sentence, years         4 years            
Probation, in years         3 years       2 years    
Probation sentence, in hours                 150 hours    
Loss contingency, legal fees incurred       $ 373   $ 373          
Loss contingency, legal fees, paid in escrow           248          
Gain contingency, unrecorded amount                     3,390
Loss contingency, damages paid, value           3,630          
Loss contingency, legal fees, refunded from escrow       248              
Loss contingency, legal fees sought to be recovered               3,296      
Loss contingency, fees and expenses charged   973 865                
Loss contingency, legal fees, interest   $ 362                  
Loss contingency, legal fees, interest, rate   0.18