CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities attributable to continuing operations:
Net income (loss) and comprehensive income (loss)	$ 25,650	$ (15,356)
Less: Loss from discontinued operations, net of tax	3,462	25,716
Income from continuing operations	29,112	10,360
Adjustments to reconcile income from continuing operations to net cash provided by operating activities attributable to continuing operations:
Loss on impairments and disposal of assets	1,400	552
Amortization of intangibles	22,622	27,513
Depreciation	8,161	6,928
Non-cash compensation expense	34,730	25,075
Deferred income taxes	(455)	(7,000)
Change in fair value of contingent consideration	(8,053)	1,053
Unrealized gain on investments	(40,072)	0
Bad debt expense	1,145	949
Amortization of debt issuance costs	2,547	1,158
Amortization of convertible debt discount	14,670	6,250
Reduction in carrying amount of ROU asset, offset by change in operating lease liabilities	11,079	1,956
Changes in current assets and liabilities:
Accounts receivable	(35,381)	35,501
Prepaid and other current assets	(680)	1,369
Accounts payable, accrued expenses and other current liabilities	3,845	(19,134)
Current contingent consideration	0	(2,670)
Income taxes receivable	10,322	63
Other, net	(412)	(2,007)
Net cash provided by operating activities attributable to continuing operations	54,580	87,916
Cash flows from investing activities attributable to continuing operations:
Capital expenditures	(23,585)	(9,108)
Equity investment	(1,180)	(80,000)
Net cash used in investing activities attributable to continuing operations	(24,765)	(89,108)
Cash flows from financing activities attributable to continuing operations:
Payments related to net-share settlement of stock-based compensation, net of proceeds from exercise of stock options	(4,771)	(6,068)
Net proceeds from revolving credit facility	0	55,000
Payment of debt issuance costs	(168)	(306)
Contingent consideration payments	0	(3,330)
Other financing activities	(31)	(14)
Net cash (used in) provided by financing activities attributable to continuing operations	(4,970)	45,282
Total cash provided by continuing operations	24,845	44,090
Net cash provided by (used in) operating activities attributable to discontinued operations	8,353	(2,571)
Total cash provided by (used in) discontinued operations	8,353	(2,571)
Net increase in cash, cash equivalents, restricted cash and restricted cash equivalents	33,198	41,519
Cash, cash equivalents, restricted cash and restricted cash equivalents at beginning of period	170,049	60,339
Cash, cash equivalents, restricted cash and restricted cash equivalents at end of period	$ 203,247	$ 101,858