Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net income	$ 54,069	$ 18,973
Adjustment to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	50,452	52,052
Amortization of contract acquisition costs	751	1,183
Amortization of debt issuance costs	909	744
Imputed interest expense and fair value adjustments to contingent consideration	207	8,204
Provision for doubtful accounts		483
(Gain) loss on disposal of assets	182	25
Impairment losses	3,569	1,120
Impairment of equity investment		15,632
Gain (adjustment) on bargain purchase of a business		(685)
Non-cash loss on assets held for sale reclassified to assets held and used		2,000
Deferred income taxes	(1,354)	(5,276)
Excess tax benefit from equity-based awards	(1,242)	(708)
Equity-based compensation expense	9,663	9,292
(Gain) loss on foreign currency derivatives	(155)	659
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	36,705	77,186
Prepaids and other assets	21,425	(39,752)
Accounts payable and accrued expenses	83,986	14,777
Deferred revenue and other liabilities	(74,770)	10,200
Net cash provided by operating activities	184,397	166,109
Cash flows from investing activities
Proceeds from sale of long-live assets	355	21
Purchases of property, plant and equipment	(44,438)	(31,841)
Investments in non-marketable equity investments		(2,119)
Acquisitions, net of cash acquired of zero and $4.5 million, respectively		(2,027)
Net cash used in investing activities	(44,083)	(35,966)
Cash flows from financing activities
Proceeds from line of credit	746,800	1,573,500
Payments on line of credit	(829,800)	(1,645,000)
Payments on other debt	(9,367)	(4,613)
Payments of contingent consideration and hold back payments to acquisitions	(5,902)	(785)
Dividends paid to shareholders	(13,864)	(12,414)
Payments to noncontrolling interest	(3,600)	(2,025)
Capital contribution from noncontrolling interest	3,362
Proceeds from exercise of stock options		208
Tax payments related to issuance of restricted stock units	(5,413)	(4,618)
Payments of debt issuance costs	(1,819)	(35)
Net cash (used in) provided by financing activities	(119,603)	(95,782)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(3,151)	(14,919)
Increase (decrease) in cash, cash equivalents and restricted cash	17,560	19,442
Cash, cash equivalents and restricted cash, beginning of period	78,237	74,437
Cash, cash equivalents and restricted cash, end of period	95,797	93,879
Supplemental disclosures
Cash paid for interest	9,901	13,677
Cash paid for income taxes	25,076	30,088
Non-cash investing and financing activities
Acquisition of long lived assets through finance leases	3,172	11,482
Acquisition of equipment through increase in accounts payable, net	(493)	1,056
Dividends declared but not paid	$ 14,875	$ 12,932