Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net (loss) income		$ (8,827)	$ 19,324
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation		19,281	21,072
Amortization of intangible assets		15,130	31,046
Amortization of financing costs and original issue discount		949	2,653
Deferred taxes		(3,757)	(52,632)
Equity-based compensation	[1]	5,908	1,526
Hedge ineffectiveness and realized (loss) gain		(31)	1,495
Provision for doubtful accounts		910	230
Other non-cash activities, net		(724)	3,067
Change in operating assets and liabilities:
Accounts receivable		18,310	31,024
Unbilled and deferred revenue		9,642	9,573
Inventories		(1,193)	1,532
Other operating assets		(491)	(16,016)
Accounts payable and other operating liabilities		(48,663)	28,624
Net cash provided by operating activities		6,444	82,518
Cash flows from investing activities:
Purchase of property and equipment		(17,328)	(29,788)
Proceeds from sale of property and equipment		1,790	654
Business acquisitions, net of cash acquired		(1,894)	(3,236)
Other investing activities, net		143	(332)
Net cash used in investing activities		(17,289)	(32,702)
Cash flows from financing activities:
Repayments of capital lease obligations		(1,481)	(1,212)
Repayments of debt		(5,185)	(7,543)
Proceeds from receivables financing agreement			20,000
Repurchase of common stock and distributions			(472)
Proceeds from issuance of common stock			99
Net cash (used in) provided by financing activities		(6,666)	10,872
Net change in cash and cash equivalents		(17,511)	60,688
Cash and cash equivalents, beginning of period		35,224	12,779
Cash and cash equivalents, end of period		$ 17,713	$ 73,467

[1] Represents equity-based compensation expense recognized for equity incentive plans outstanding, including $3,957 related to the IPO during the three months ended December 31, 2018.