Summary of Significant Accounting Policies - FinInst (Details)	3 Months Ended	12 Months Ended
	Sep. 30, 2016 USD ($) item	Jun. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)
Financial Instruments and Concentration of Credit Risk
Number of financial institutions in the U.S. in which cash and cash equivalents are primarily maintained | item	3
Number of marketable securities held by entity	$ 0			$ 0
Cash and Cash Equivalents
Cash and cash equivalents	196,000,000	$ 245,026,000	$ 247,843,000	$ 278,109,000
Noncash Investing Activities
Accrued capital expenditures	$ 306,000	$ 804,000