Summary of Significant Accounting Policies (Tables)

9 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Realized gains (losses) on derivatives not designated as hedging instruments

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Realized gains (losses) on derivatives not designated as hedging instruments	$	3,770	$	4,889	$	2,916	$	(1,332)

Schedule of cumulative effect of adoption

	As Reported		Impact of Adopting		As Adopted
	September 30, 2018		ASC 606		October 1, 2018
Prepaid expenses and other current assets	$	31,741	$	350	$	32,091
Prepaid expenses and other current assets - discontinued operations		343		235		578
Other assets		5,294		1,483		6,777
Long-term deferred tax assets		43,798		403		44,201
Deferred revenue		25,884		2,850		28,734
Deferred revenue - discontinued operations		1,052		480		1,532
Accumulated deficit		(994,074)		(859)		(994,933)

		Three Months Ended June 30, 2019
			Without adoption of		Effect of Change
	As Reported		ASC 606		Higher/(Lower)
Revenue	$	203,880	$	204,738	$	(858)
Cost of revenue		120,370		120,838		(468)
Gross profit		83,510		83,900		(390)
Operating expenses		67,087		66,914		173
Operating income	$	16,423	$	16,986	$	(563)
		Nine Months Ended June 30, 2019
			Without adoption of		Effect of Change
	As Reported		ASC 606		Higher/(Lower)
Revenue	$	581,637	$	584,061	$	(2,424)
Cost of revenue		345,531		347,009		(1,478)
Gross profit		236,106		237,052		(946)
Operating expenses		200,679		200,109		570
Operating income	$	35,427	$	36,943	$	(1,516)

		June 30, 2019
			Without adoption of		Effect of Change
	As Reported		ASC 606		Higher/(Lower)
Prepaid expenses and other current assets	$	40,441	$	36,388	$	4,053
Other assets		21,126		20,212		914
Deferred revenue		30,598		28,033		2,565
Accumulated deficit		(991,499)		(993,901)		2,402