Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
OPERATING ACTIVITIES
Net income	$ 14,891	$ 22,357
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,186	22,584
Asset impairment	0	1,109
Interest accretion of convertible notes discount	6,118	5,654
Employee share-based compensation expense	7,188	7,786
Financing costs amortization	642	647
Unrealized foreign currency transaction loss (gain)	349	(1,309)
Other non-cash operating activities	1,054	(424)
Changes in assets and liabilities, net of acquisitions:
Accounts receivable	32,529	(15,153)
Inventory	7,052	(17,802)
Unbilled contract revenues and other assets	30,312	13,944
Accounts payable and other liabilities	(39,907)	(31,280)
Customer advances and billings in excess of contract revenue	7,415	(119)
Net Cash Provided By Operating Activities	86,829	7,994
INVESTING ACTIVITIES
Capital expenditures	(9,418)	(24,479)
Payments for land use rights	0	(11,043)
Proceeds from sale of assets	0	200
Government grants	612	0
Acquisition of businesses, net of cash acquired	(1,383)	(320)
Net Cash Used In Investing Activities	(10,189)	(35,642)
FINANCING ACTIVITIES
Borrowings on revolving credit facilities	3,820	12,377
Repayments on revolving credit facilities	(3,816)	(743)
Borrowings on term loan	13,167	0
Repayments on term loan	(1,508)	0
Proceeds from exercise of options	17	469
Excess tax benefit from share-based compensation	54	130
Payment of Contingent Consideration	0	(611)
Common stock repurchases	(643)	(823)
Other financing activities	0	(157)
Net Cash Provided By Financing Activities	11,091	10,642
Effect of exchange rate changes on cash	1,719	(3,765)
Net increase (decrease) in cash and cash equivalents	89,450	(20,771)
Cash and cash equivalents at beginning of period	123,708	103,656
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 213,158	$ 82,885