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Summary of Significant Accounting Policies - Additional Information (Detail) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2013	Mar. 31, 2015	Mar. 31, 2014
Significant Accounting Policies [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	147	3,590		428	3,590
Multiple Delivery Revenue [Member]
Significant Accounting Policies [Line Items]
Percentage Of Revenue Recognized	26.00%	35.00%	29.00%	27.00%	40.00%

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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