Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
OPERATING ACTIVITIES
Net income	$ 28,575	$ 26,628
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	28,605	34,134
Asset impairment	1,217	1,556
Interest accretion of convertible notes discount	9,268	8,566
Employee share-based compensation expense	9,014	9,203
Financing costs amortization	963	969
Unrealized foreign currency transaction loss (gain)	318	(764)
Other non-cash operating activities	(390)	(136)
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	55,706	17,269
Inventory	16,246	(8,073)
Unbilled contract revenues and other assets	38,721	13,170
Accounts payable and other liabilities	(43,393)	(36,524)
Customer advances and billings in excess of contract revenue	1,742	(11,573)
Net Cash Provided By Operating Activities	146,592	54,425
INVESTING ACTIVITIES
Capital expenditures	(13,411)	(36,066)
Payments for land use rights	0	(11,043)
Proceeds from sale of assets	0	395
Government grants	1,055	0
Acquisition of businesses, net of cash acquired	(1,383)	(24,517)
Net Cash Used In Investing Activities	(13,739)	(71,231)
FINANCING ACTIVITIES
Borrowings on revolving credit facilities	3,820	68,827
Repayments on revolving credit facilities	(6,061)	(67,196)
Borrowings on term loan	13,167	0
Repayments on term loan	(1,508)	0
Proceeds from exercise of options	26	486
Excess tax benefit from share-based compensation	54	133
Payment of contingent consideration	0	(611)
Common stock repurchases	(658)	(849)
Dividend distribution to noncontrolling interest	0	(120)
Other financing activities	0	(156)
Net Cash Provided By Financing Activities	8,840	514
Effect of exchange rate changes on cash	1,875	(4,827)
Net increase (decrease) in cash and cash equivalents	143,568	(21,119)
Cash and cash equivalents at beginning of period	123,708	103,656
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 267,276	$ 82,537