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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Reconciliation of Non-Controlling Interest Balance) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Noncontrolling Interest [Line Items]        
Balance at Beginning of period $ 8,139us-gaap_MinorityInterest $ 5,975us-gaap_MinorityInterest $ 6,393us-gaap_MinorityInterest $ 854us-gaap_MinorityInterest
Net Income Attributable to Noncontrolling Interest 84us-gaap_NetIncomeLossAttributableToNoncontrollingInterest 19us-gaap_NetIncomeLossAttributableToNoncontrollingInterest 470us-gaap_NetIncomeLossAttributableToNoncontrollingInterest 227us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Accretion of Noncontrolling Interest Put Option 877dv_AccretionOfNoncontrollingInterestPutOption 195dv_AccretionOfNoncontrollingInterestPutOption 2,237dv_AccretionOfNoncontrollingInterestPutOption 5,108dv_AccretionOfNoncontrollingInterestPutOption
Balance at End of period $ 9,100us-gaap_MinorityInterest $ 6,189us-gaap_MinorityInterest $ 9,100us-gaap_MinorityInterest $ 6,189us-gaap_MinorityInterest