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Fair Value Measurements (Tables)
6 Months Ended
Sep. 30, 2011
Fair Value Disclosures [Abstract] 
Fair Value, Measurement Inputs, Disclosure [Table Text Block]
(in thousands)            
September 30, 2011 Level 1 Level 3 Total
Assets:            
 Conversion option on VIE convertible note (a) $ -  $ 775  $ 775 
               
Liabilities:            
 Deferred compensation (b) $ 86,476  $ -  $ 86,476 
 Contingent consideration (c)    -    8,983    8,983 
  Total liabilities $ 86,476  $ 8,983  $ 95,459 
               
April 1, 2011 Level 1 Level 3 Total
Assets:            
 Conversion option on VIE convertible note (a) $ -  $ 845  $ 845 
               
Liabilities:            
 Deferred compensation (b) $ 84,165  $ -  $ 84,165 
 Contingent consideration (c)    -    10,155    10,155 
  Total liabilities $ 84,165  $ 10,155  $ 94,320 
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
 (in thousands)Level 3 Instruments
 Assets:   
 Balance as of April 1, 2011$ 845 
  Fair value adjustment included in earnings  (70) 
 Balance as of September 30, 2011$ 775 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
 Liabilities:   
 Balance as of April 1, 2011$ 10,155 
  Settlements  (1,000) 
  Fair value adjustment included in earnings  (172) 
 Balance as of September 30, 2011$ 8,983