Summary of Significant Accounting Policies - FinInst (Details)	6 Months Ended	12 Months Ended
	Dec. 31, 2016 USD ($) item	Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)
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		$ 0
Cash and Cash Equivalents
Cash and cash equivalents	159,964,000	245,026,000	$ 245,026,000	$ 278,109,000	$ 142,261,000	$ 194,960,000
Noncash Investing Activities
Accrued capital expenditures	$ 356,000	$ 804,000