CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income	$ 127,211	$ 111,214
Adjustments to reconcile to net cash provided by operating activities
Depreciation and amortization	80,595	81,775
Deferred income taxes	2,221	(12,389)
Losses (gains) on sale of assets	754	(188)
Stock-based compensation	8,624	7,604
Pension contributions	(5,397)	(3,956)
Changes in assets and liabilities, net of acquisitions:
Trade receivables	(133,291)	(55,935)
Inventories	(568)	(24,719)
Accounts payable	(31,635)	8,988
Accruals for incentive compensation	(19,340)	(36,969)
Other current payables and accrued expenses	(65,158)	(11,321)
Other assets	42,462	(9,978)
Other liabilities	10,467	(6,894)
Net cash provided by operating activities	16,945	47,232
Cash flows from investing activities:
Cash paid for acquisitions, net of cash received	0	(33,895)
Additions to property, plant and equipment	(48,294)	(57,609)
Proceeds from life insurance contracts	1,739	1,890
Proceeds from disposal of assets	3,806	3,970
Contingent consideration paid	0	(4,655)
Net cash used in investing activities	(42,749)	(90,299)
Cash flows from financing activities:
Cash dividends paid to shareholders	(80,038)	(77,779)
Increase in revolving credit facility and short term borrowings	169	2,895
Repayments on debt	(11,584)	(36,156)
Contingent consideration paid	(327)	0
Purchases of redeemable noncontrolling interest	(14,173)	0
Proceeds from issuance of stock in connection with stock options	0	200
Employee withholding taxes paid	(1,275)	(1,339)
Net cash used in financing activities	(107,228)	(112,179)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(42,529)	3,853
Net change in cash, cash equivalents and restricted cash	(175,561)	(151,393)
Cash, cash equivalents and restricted cash at beginning of year	623,945	648,522
Cash, cash equivalents and restricted cash at end of period	448,384	497,129
Supplemental Disclosures:
Interest paid, net of amounts capitalized	41,755	48,506
Income taxes paid	32,636	33,326
Accrued capital expenditures	$ 19,013	$ 14,241