Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
OPERATING ACTIVITIES
Net income	$ 26,628	$ 55,862
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	34,134	31,596
Asset impairment	1,556	0
Interest accretion of convertible notes discount	8,566	7,917
Employee share-based compensation expense	9,203	7,613
Financing costs amortization	969	979
Unrealized foreign currency transaction (gain) loss	(764)	2,295
Other non-cash operating activities	(136)	(67)
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	17,269	39,771
Inventory	(8,073)	(19,106)
Unbilled contract revenues and other assets	13,170	(40,301)
Accounts payable and other liabilities	(35,853)	(11,361)
Customer advances and billings in excess of contract revenue	(11,573)	(9,093)
Net Cash Provided By Operating Activities	55,096	66,105
INVESTING ACTIVITIES
Capital expenditures	(36,066)	(42,886)
Payments for China land use rights	(11,043)	0
Proceeds from sale of assets	395	1,692
Acquisition of businesses, net of cash acquired	(24,517)	(11,943)
Net Cash Used In Investing Activities	(71,231)	(53,137)
FINANCING ACTIVITIES
Borrowings on revolving credit facilities	68,827	7,884
Repayments on revolving credit facilities	(67,196)	(3,252)
Payments on long-term debt	0	(2,813)
Proceeds from exercise of stock options	486	706
Excess tax (deficiency) benefit from share-based compensation	(538)	1,753
Payment of contingent consideration	(611)	(741)
Common stock repurchases	(849)	(3,326)
Dividend distribution to noncontrolling interests	(120)	(1,206)
Other financing activities	(156)	0
Net Cash Used In Financing Activities	(157)	(995)
Effect of exchange rate changes on cash	(4,827)	(8,896)
Net (decrease) increase in cash and cash equivalents	(21,119)	3,077
Cash and cash equivalents at beginning of period	103,656	137,345
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 82,537	$ 140,422