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Income Taxes (Details) (USD $)
3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Unrecognized tax benefits $ 0us-gaap_UnrecognizedTaxBenefits   $ 0us-gaap_UnrecognizedTaxBenefits  
Net loss for state tax purposes     19,100,000us-gaap_OtherComprehensiveIncomeLossTax  
Accrued interest and penalties, unrecognized tax benefits     0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense  
Income tax expense 494,180us-gaap_IncomeTaxExpenseBenefit 423,612us-gaap_IncomeTaxExpenseBenefit 2,118,218us-gaap_IncomeTaxExpenseBenefit 1,148,155us-gaap_IncomeTaxExpenseBenefit
Income tax expense, effective rates (as a percent)     40.60%us-gaap_EffectiveIncomeTaxRateContinuingOperations 36.60%us-gaap_EffectiveIncomeTaxRateContinuingOperations
State        
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Net loss for state tax purposes     24,200,000us-gaap_OtherComprehensiveIncomeLossTax
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
 
Louisiana | State        
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Tax loss carryforwards 5,100,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
/ us-gaap_StatementGeographicalAxis
= stpr_LA
  5,100,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
/ us-gaap_StatementGeographicalAxis
= stpr_LA
 
Louisiana | State | Settlement with Taxing Authority        
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Request for refund of cash taxes paid $ 1,500,000us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
/ us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis
= us-gaap_SettlementWithTaxingAuthorityMember
/ us-gaap_StatementGeographicalAxis
= stpr_LA
  $ 1,500,000us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember
/ us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis
= us-gaap_SettlementWithTaxingAuthorityMember
/ us-gaap_StatementGeographicalAxis
= stpr_LA