Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities
Net income (loss)	$ 57,875	$ 22,384
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	46,000	51,563
Stock-based compensation	15,254	13,300
Amortization of prepaid debt fees	800	806
Deferred taxes, net	7,615	17,772
Restructuring, non-cash	(720)	5,153
Other adjustments, net	3,111	(734)
Changes in operating assets and liabilities:
Accounts receivable	2,537	(32,652)
Inventories	(30,843)	3,207
Other current assets	(23,492)	(15,591)
Other long-term assets	10,460	8,499
Accounts payable, other current liabilities, and taxes payable	34,987	(5,830)
Wages and benefits payable	6,218	11,516
Unearned revenue	(5,679)	(8,684)
Warranty	(10,285)	(9,900)
Other operating, net	663	21,072
Net cash provided by operating activities	114,501	81,881
Investing activities
Acquisitions of property, plant, and equipment	(33,493)	(30,563)
Business acquisitions, net of cash and cash equivalents acquired	(98,848)	(951)
Other investing, net	10	(1,258)
Net cash used in investing activities	(132,331)	(32,772)
Financing activities
Proceeds from borrowings	35,000	0
Payments on debt	(24,844)	(29,031)
Issuance of common stock	2,797	1,993
Other financing, net	1,216	(3,658)
Net cash provided by (used in) financing activities	14,169	(30,696)
Effect of foreign exchange rate changes on cash and cash equivalents	7,680	1,949
Increase in cash and cash equivalents	4,019	20,362
Cash and cash equivalents at beginning of period	133,565	131,018
Cash and cash equivalents at end of period	137,584	151,380
Supplemental disclosure of cash flow information:
Income taxes, net	25,423	17,207
Interest, net of amounts capitalized	$ 7,629	$ 7,592