Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating activities
Net income (loss)	$ (23.3)	$ (8.3)
Adjustments to reconcile net income (loss) to net cash used in operations:
Depreciation and amortization	4.9	3.2
Share-based compensation	3.9	3.7
Deferred income taxes	12.3	(0.5)
Changes in operating assets and liabilities:
Accounts receivable and related party accounts receivable	(15.3)	(24.2)
Prepaid income taxes	(0.4)	3.7
Prepaid expenses and other assets	(0.9)	(15.5)
Accounts payable	(1.4)	(4.0)
Accrued compensation and benefits	(0.2)	3.2
Other liabilities	3.4	3.5
Customer liabilities and customer liabilities - related party	7.1	7.3
Net cash used in operating activities	(9.9)	(27.9)
Investing activities
Purchases of property, equipment, and software	(3.4)	(9.2)
Net cash used in investing activities	(3.4)	(9.2)
Financing activities
Issuance of common stock and stock warrants, net of issuance costs	19.3	0.0
Exercise of vested stock options	0.2	0.0
Purchase of treasury stock	0.0	(0.6)
Shares withheld for taxes	(1.9)	(1.5)
Net cash provided (used in) by financing activities	17.6	(2.1)
Effect of exchange rate changes in cash, cash equivalents and restricted cash	(0.2)	0.7
Net increase (decrease) in cash, cash equivalents and restricted cash	4.1	(38.5)
Cash, cash equivalents and restricted cash, at beginning of period	166.4	182.7
Cash, cash equivalents and restricted cash, at end of period	170.5	144.2
Supplemental disclosures of cash flow information
Accrued dividends payable to Preferred Stockholders	4.6	4.3
Accrued and other liabilities related to purchases of property, equipment and software	4.1	0.3
Accounts payable related to purchases of property, equipment and software	0.6	0.4
Income taxes paid	(0.4)	(0.3)
Income taxes refunded	$ 0.4	$ 3.4