Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net income	$ 58,234	$ 34,090
Adjustment to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	37,532	33,793
Amortization of contract acquisition costs	205	488
Amortization of debt issuance costs	366	735
Imputed interest expense and fair value adjustments to contingent consideration	1,941	(555)
Provision for credit losses	607
(Gain) loss on disposal of assets	17	34
Loss on dissolution of subsidiary	2,467
Impairment losses	696	3,569
Deferred income taxes	3,289	(2,724)
Excess tax benefit from equity-based awards	(403)	(557)
Equity-based compensation expense	5,976	6,534
(Gain) loss on foreign currency derivatives	114	(232)
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	(26,007)	27,688
Prepaids and other assets	30,287	13,103
Accounts payable and accrued expenses	35,572	62,770
Deferred revenue and other liabilities	(45,615)	(57,470)
Net cash provided by operating activities	105,278	121,266
Cash flows from investing activities
Proceeds from sale of long-live assets	16	327
Purchases of property, plant and equipment	(31,915)	(28,428)
Acquisitions, net of cash acquired of $3,123 and zero, respectively	(4,421)
Net cash used in investing activities	(36,320)	(28,101)
Cash flows from financing activities
Proceeds from line of credit	905,700	540,200
Payments on line of credit	(495,700)	(594,200)
Payments on other debt	(4,356)	(7,016)
Payments of contingent consideration and hold back payments to acquisitions	(48,686)	(5,902)
Dividends paid to shareholders	(15,843)	(13,864)
Payments to noncontrolling interest	(5,091)	(2,250)
Capital contribution from noncontrolling interest		3,362
Tax payments related to issuance of restricted stock units	(3,218)	(3,223)
Payments of debt issuance costs	(35)	(1,819)
Net cash (used in) provided by financing activities	332,771	(84,712)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(4,645)	239
Increase (decrease) in cash, cash equivalents and restricted cash	397,084	8,692
Cash, cash equivalents and restricted cash, beginning of period	105,591	78,237
Cash, cash equivalents and restricted cash, end of period	502,675	86,929
Supplemental disclosures
Cash paid for interest	5,924	6,844
Cash paid for income taxes	10,605	19,445
Non-cash investing and financing activities
Acquisition of long lived assets through finance leases	1,599	1,318
Acquisition of equipment through increase in accounts payable, net	$ (2,169)	$ 221