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Summary of Significant Accounting Policies - ASU (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2018
Summary of Significant Accounting Policies
Cash flows from operations	$ 141,606	$ 105,446	$ 88,728
Cash flows from financing activities	(28,989)	(52,720)	$ (14,644)
Retained earnings	22,447	(13,432)
Lease liability	1,779	2,758
ASU 2016-15
Summary of Significant Accounting Policies
Cash flows from operations		(1,800)
Cash flows from financing activities		$ 1,800
ASU 2016-02 \| Scenario Forecast Adjustment \| Minimum
Summary of Significant Accounting Policies
ROU asset	18,000
ASU 2016-02 \| Scenario Forecast Adjustment \| Maximum
Summary of Significant Accounting Policies
Lease liability	23,000
Adjustment due to ASC 606
Summary of Significant Accounting Policies
Retained earnings	$ 60
Adjustment due to ASC 606 \| ASU 2014-09
Summary of Significant Accounting Policies
Retained earnings				$ 1,300