Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income	$ 24,685	$ 20,476
Adjustment to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	18,872	16,743
Amortization of contract acquisition costs	130	253
Amortization of debt issuance costs	183	556
Imputed interest expense and fair value adjustments to contingent consideration	3,220	1,364
Provision for credit losses	162
(Gain) loss on disposal of assets	14	7
Impairment losses	696	1,506
Deferred income taxes	4,589	(2,358)
Excess tax benefit from equity-based awards	(195)	(320)
Equity-based compensation expense	2,919	3,168
(Gain) loss on foreign currency derivatives	485	(42)
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	11,611	18,580
Prepaids and other assets	19,219	5,869
Accounts payable and accrued expenses	(933)	25,616
Deferred revenue and other liabilities	(23,492)	(11,455)
Net cash provided by operating activities	62,165	79,963
Cash flows from investing activities
Proceeds from sale of long-live assets	15	15
Purchases of property, plant and equipment	(16,813)	(13,200)
Acquisitions, net of cash acquired of $3,123 and zero, respectively	(5,243)
Net cash used in investing activities	(22,041)	(13,185)
Cash flows from financing activities
Proceeds from line of credit	523,200	253,600
Payments on line of credit	(113,200)	(293,600)
Payments on other debt	(2,400)	(4,498)
Payments of contingent consideration and hold back payments to acquisitions		(5,537)
Payments to noncontrolling interest	(2,091)	(900)
Capital contribution from noncontrolling interest		1,330
Tax payments related to issuance of restricted stock units	(1,810)	(1,773)
Payments of debt issuance costs	(35)	(1,729)
Net cash (used in) provided by financing activities	403,664	(53,107)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(7,374)	(469)
Increase (decrease) in cash, cash equivalents and restricted cash	436,414	13,202
Cash, cash equivalents and restricted cash, beginning of period	105,591	78,237
Cash, cash equivalents and restricted cash, end of period	542,005	91,439
Supplemental disclosures
Cash paid for interest	2,864	3,360
Cash paid for income taxes	3,248	2,476
Non-cash investing and financing activities
Acquisition of long lived assets through finance leases	837	3,617
Acquisition of equipment through increase in accounts payable, net	(3,511)	1,780
Dividends declared but not paid	$ 15,843	$ 13,864