Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Unobservable Input Reconciliation (Details)

v3.3.0.814
Fair Value Measurements - Unobservable Input Reconciliation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Rolling production average 60 days  
Impairment of proved oil and gas properties $ 17,353 $ 0
Impairment of goodwill 674 0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Accretion expense 36 315
Contingent consideration payable | Recurring | Level 3    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of year 1,852 3,940
Accretion expense 36 315
Revision to estimate (1,888) (2,403)
Fiscal year closing balance $ 0 $ 1,852
Discounted cash flow model | Contingent consideration payable | Recurring | Level 3    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Discount rate   8.00%