Consolidated Statements of Cash Flows - USD ($)		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net loss		$ (105,900,000)	$ (243,400,000)	$ (71,500,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization		248,800,000	211,400,000	132,600,000
Share-based compensation		31,200,000	34,400,000	22,200,000
Debt discount amortization		7,000,000.0	3,500,000	400,000
Loss on debt extinguishment		0	13,800,000	8,600,000
Loss on debt extinguishment				8,600,000
Amortization of debt issuance costs		4,800,000	4,400,000	3,800,000
Change in fair value of derivative financial liability		31,400,000	128,500,000	0
Excess tax benefit from share-based compensation		1,900,000	(5,900,000)	(6,200,000)
Deferred income taxes		(20,400,000)	100,000	16,500,000
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net		6,300,000	4,500,000	14,200,000
Prepaid expenses and other current assets		(3,400,000)	26,100,000	6,200,000
Other long-term assets		1,300,000	14,900,000	1,000,000.0
Accounts payable		(26,900,000)	(7,700,000)	(22,700,000)
Accrued expenses and other current liabilities		(29,800,000)	(74,500,000)	7,700,000
Operating lease liabilities		(6,700,000)
Deferred revenue		(34,200,000)	(14,200,000)	(39,700,000)
Other long-term liabilities		1,700,000	(13,500,000)	(9,700,000)
Net cash provided by operating activities		107,100,000	82,400,000	63,400,000
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired		(52,600,000)	(2,242,700,000)	(706,300,000)
Purchase of customer contracts		(200,000)	(100,000)	(14,900,000)
Settlement of deal-contingent foreign currency hedge		0	(105,800,000)	0
Purchases of property and equipment		(102,200,000)	(77,700,000)	(42,000,000.0)
Purchases of intangible assets		0	0	(1,500,000)
Net cash used in investing activities		(155,000,000.0)	(2,426,300,000)	(764,700,000)
Cash flows from financing activities:
Proceeds from revolving line of credit		145,000,000.0	96,500,000	50,000,000.0
Repayment of revolving line of credit		(64,000,000.0)	(37,500,000)	(70,000,000.0)
Proceeds from term loans		0	2,633,700,000	696,500,000
Repayment of term loans		(26,100,000)	(706,200,000)	(432,800,000)
Proceeds from senior note		0	0	291,500,000
Repayment of other secured borrowings		(12,800,000)	(9,700,000)	0
Payment of holdbacks		(6,500,000)	(13,000,000.0)	(28,700,000)
Debt issuance costs paid to third parties and lenders		(1,200,000)	(63,300,000)	(34,000,000.0)
Proceeds from equity issuance, net of issuance costs		0	424,500,000	0
Repayment of finance leases		(1,300,000)	(2,700,000)	(1,600,000)
Proceeds from issuance of common stock under employee stock purchase plan		1,400,000	1,300,000	700,000
Tax withholding related to the vesting of restricted stock		(400,000)	(21,000,000.0)	(4,000,000.0)
Exercise of stock options		900,000	1,700,000	2,100,000
Net cash provided by financing activities		35,000,000.0	2,304,300,000	469,700,000
Effect of exchange rate changes on cash		(600,000)	(6,300,000)	(1,200,000)
Net decrease in cash, cash equivalents, and restricted cash		(13,500,000)	(45,900,000)	(232,800,000)
Cash, cash equivalents, and restricted cash at beginning of period		55,300,000	101,200,000	334,000,000.0
Cash, cash equivalents, and restricted cash at end of period		41,800,000	55,300,000	101,200,000
Supplemental disclosure of cash flow information:
Cash paid for interest		176,600,000	158,800,000	47,200,000
Cash paid for income taxes, net		1,300,000	5,300,000	1,700,000
Supplemental disclosure of non-cash investing and financing activities:
Fair value of current assets acquired		5,700,000	249,600,000	76,800,000
Fair value of non-current assets acquired	[1]	39,300,000	1,687,400,000	772,000,000.0
Fair value of current liabilities assumed		12,500,000	355,700,000	87,700,000
Fair value of non-current liabilities assumed		7,300,000	423,000,000.0	215,500,000
Fair value of shares issued in connection with acquisition		$ (300,000)	$ 8,800,000	$ 141,900,000

[1] Excludes goodwill