XML 58 R35.htm IDEA: XBRL DOCUMENT v3.2.0.727
Fair Value and Credit Risk of Financial Instruments - Fair Value Measurement of Financial Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Jun. 30, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Financial assets fair value disclosure $ 135,013 $ 229,412
Money Market Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents 124,564 219,440
Restricted cash 1,820 1,345
Collateral deposits 8,629 8,627
(Level 1) Quoted Prices in Active Markets for Identical Assets [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Financial assets fair value disclosure 135,013 229,412
(Level 1) Quoted Prices in Active Markets for Identical Assets [Member] | Money Market Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents 124,564 219,440
Restricted cash 1,820 1,345
Collateral deposits 8,629 8,627
(Level 2) Significant Other Observable Inputs [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Financial assets fair value disclosure 0 0
(Level 2) Significant Other Observable Inputs [Member] | Money Market Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents 0 0
Restricted cash 0 0
Collateral deposits 0 0
(Level 3) Significant Unobservable Inputs [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Financial assets fair value disclosure 0 0
(Level 3) Significant Unobservable Inputs [Member] | Money Market Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents 0 0
Restricted cash 0 0
Collateral deposits $ 0 $ 0