Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities:
Net income	$ 88,247	$ 83,330
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	47,070	45,488
Loss (gain) on disposition of property, plant and equipment	52	(24)
Stock compensation expense	5,469	5,494
Changes in assets and liabilities, net of the effects of acquisitions:
Accounts receivable	(22,623)	(18,304)
Inventories	(23,057)	(10,743)
Prepaid expenses and other current assets	(9,905)	(642)
Accounts payable	5,282	15,717
Accrued liabilities	12,595	8,517
Deferred income taxes	(6,492)	(14,569)
Long-term retirement benefits	(725)	(12,533)
Long-term tax liability	(7,465)	0
Other	133	663
Net cash provided by operating activities	88,581	102,394
Investing activities:
Proceeds from disposition of property, plant and equipment	478	205
Capital expenditures	(24,335)	(27,325)
Business acquisitions, net of cash acquired	0	(8,811)
Revenue sharing program payments	(5,800)	0
Other	(1,000)	(3,000)
Net cash used by investing activities	(30,657)	(38,931)
Financing activities:
Net change in other borrowings	16,795	(20,925)
Payments on long-term debt	(313,512)	(49,311)
Proceeds from the issuance of long-term debt	353,089	74,716
Proceeds from the issuance of common stock	435	1,148
Common stock repurchases	(118,115)	(5,383)
Dividends paid	(15,795)	(14,524)
Withholding taxes paid on stock issuances	(175)	(240)
Other	(2,550)	(14,451)
Net cash used by financing activities	(79,828)	(28,970)
Effect of exchange rate changes on cash flows	(2,924)	3,865
(Decrease) increase in cash and cash equivalents	(24,828)	38,358
Cash and cash equivalents at beginning of period	145,290	66,447
Cash and cash equivalents at end of period	$ 120,462	$ 104,805