Commitments and Contingencies (Details) - USD ($) $ in Thousands	1 Months Ended
	Jul. 31, 2016	Jul. 01, 2017	Sep. 30, 2016
Loss Contingencies [Line Items]
Accounts receivable, net of allowance for doubtful accounts of $1,419 and $1,012 at July 1, 2017 and September 30, 2016, respectively		$ 128,561	$ 161,357
Pending Litigation
Loss Contingencies [Line Items]
Loss contingency accrual		600
Korea
Loss Contingencies [Line Items]
Income tax examination, estimate of possible loss	$ 12,000
Minimum | Customer Contracts
Loss Contingencies [Line Items]
Accounts receivable, net of allowance for doubtful accounts of $1,419 and $1,012 at July 1, 2017 and September 30, 2016, respectively		0
Maximum | Customer Contracts
Loss Contingencies [Line Items]
Accounts receivable, net of allowance for doubtful accounts of $1,419 and $1,012 at July 1, 2017 and September 30, 2016, respectively		$ 17,300