CONSOLIDATED AND COMBINED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net earnings (loss)	$ 40,695	$ (46,296)
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Stock-based compensation expense	69,433	120,280
Amortization of intangibles	47,695	6,885
Bad debt expense	34,844	20,625
Depreciation	18,170	9,705
Deferred income taxes	(2,041)	(71,446)
Other adjustments, net	(107)	(1,328)
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(52,021)	(30,080)
Other assets	(19,040)	(5,782)
Accounts payable and other liabilities	11,303	45,480
Income taxes payable and receivable	1,402	22
Deferred revenue	3,378	7,788
Net cash provided by operating activities	153,711	55,853
Cash flows from investing activities:
Acquisitions, net of cash acquired	0	(66,378)
Capital expenditures	(32,886)	(16,278)
Purchases of marketable debt securities	(34,816)	0
Proceeds from sale of fixed assets	10,412	0
Net cash used in investing activities	(57,290)	(82,656)
Cash flows from financing activities:
Principal payments on term loan	(10,313)	0
Proceeds from issuance of related party debt	0	131,360
Principal payments on related party debt	(1,904)	(104,894)
Proceeds from the exercise of stock options	2,876	0
Withholding taxes paid on behalf of employees on net settled stock-based awards	(27,206)	0
Transfers from IAC/InterActiveCorp for periods prior to the Combination	0	24,178
Purchase of noncontrolling interests	(1,289)	(12,574)
Other, net	39	34
Net cash (used in) provided by financing activities	(37,797)	38,104
Total cash provided	58,624	11,301
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(223)	1,507
Net increase in cash, cash equivalents, and restricted cash	58,401	12,808
Cash, cash equivalents, and restricted cash at beginning of period	221,521	46,925
Cash, cash equivalents, and restricted cash at end of period	$ 279,922	$ 59,733

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-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130534-203044

+ Details

Name:	us-gaap_ProvisionForDoubtfulAccounts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

+ References

+ Details

Name:	us-gaap_RepaymentsOfSecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration