Consolidated Cash Flow Statements - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 92,853	$ 127,646	$ 66,180
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	149,650	145,593	150,342
Impairment of assets held for sale	0	23,931	0
Share-based compensation	14,647	18,178	17,745
Loss on debt extinguishment	52,441	2,342	0
Deferred income tax benefit	(24,098)	(30,034)	(45,674)
Changes in operating assets and liabilities, net of the effects of currency exchange rate changes and acquired businesses:
Receivables	(24,931)	(10,115)	6,066
Inventories	(84,088)	2,677	19,204
Accounts payable	100,752	39,298	(38,907)
Accrued liabilities	(25,076)	(13,181)	59,214
Accrued taxes	5,001	11,722	11,981
Other assets	(13,255)	760	(4,840)
Other liabilities	11,404	(4,023)	149
Net cash provided by operating activities	255,300	314,794	241,460
Net cash provided by operating activities
Cash used to acquire businesses, net of cash acquired	(166,896)	(18,848)	(695,345)
Capital expenditures	(64,261)	(53,974)	(54,969)
Other	0	(827)	0
Proceeds from disposal of business	0	0	3,527
Proceeds from disposal of tangible assets	1,039	392	533
Net cash used for investing activities	(230,118)	(73,257)	(746,254)
Cash flows from financing activities:
Payments under borrowing arrangements	(1,105,892)	(294,375)	(152,500)
Cash dividends paid	(43,376)	(16,079)	(8,395)
Payments under share repurchase program	(25,000)	0	(39,053)
Debt issuance costs paid	(17,316)	(3,910)	(898)
Withholding tax payments for share based payment awards, net of proceeds from the exercise of stock options	(6,564)	(7,480)	(11,693)
Borrowings under credit arrangements	866,700	222,050	200,000
Proceeds from the issuance of preferred stock, net	0	501,498	0
Contribution from noncontrolling interest	0	0	1,470
Net cash provided by (used for) financing activities	(331,448)	401,704	(11,069)
Effect of foreign currency exchange rate changes on cash and cash equivalents	19,258	(11,876)	(8,548)
Increase (decrease) in cash and cash equivalents	(287,008)	631,365	(524,411)
Cash and cash equivalents, beginning of period	848,116	216,751	741,162
Cash and cash equivalents, end of period	$ 561,108	$ 848,116	$ 216,751