Revenue -Summary of Contract with Customer, Asset and Liability (Details) - USD ($) $ in Thousands		6 Months Ended
		Dec. 31, 2018	Jul. 01, 2018	Jun. 30, 2018
ASSETS
Unbilled accounts receivable - current	[1]	$ 11,025	$ 3,218
Long Term Accounts Receivable	[2]	4,797	6,833
Interest receivable - non-current	[2]	987	611
Change in unbilled accounts receivable - current	[1]	7,807
Change in long term accounts receivable	[2]	(2,036)
Change in Interest receivable - non-current	[2]	$ 376
Percentage change in unbilled accounts receivable - current	[1]	71.00%
Percentage change in long term accounts receivable	[2]	(42.00%)
Percentage change in interest receivable - non-current	[2]	38.00%
Liabilities:
Customer advances		$ 19,900	22,896	$ 22,896
Deferred revenue - current		72,726	75,515	75,404
Deferred revenue - non-current		23,406	$ 20,976	$ 20,976
Change in customer advances		(2,996)
Change in unbilled deferred revenue - current		(2,789)
Change in unbilled deferred revenue - non-current		$ 2,430
Percentage change in customer advances		(15.00%)
Percentage change in unbilled deferred revenue - current		(4.00%)
Percentage change in unbilled deferred revenue - non-current		10.00%

[1] Included in accounts receivable on consolidated balance sheets

[2] Included in other assets on consolidated balance sheets