CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net cash provided by operating activities	$ 107,325	$ 77,834
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition, net of cash acquired		(124,916)
Decrease in restricted cash	1,278	6,949
Purchases of property, plant and equipment	(37,081)	(30,780)
Proceeds from sales of property, plant and equipment	1,428	58
Purchases of short-term investments		(21,690)
Proceeds from maturity of short-term investments	8,516
Purchases of equity securities	(1,842)	(5,563)
Proceeds from sale of equity securities	562	7,458
Other	518	(958)
Net cash used by investing activities	(26,621)	(169,442)
CASH FLOWS FROM FINANCING ACTIVITIES
Advances on lines of credit	6,120	10,196
Repayments on lines of credit	(9,849)	(30,029)
Borrowings of long-term debt		181,000
Repayments of long-term debt	(35,831)	(22,849)
Net proceeds from issuance of common stock	5,729	2,300
Other	(159)	(3,927)
Net cash provided by (used by) financing activities	(33,990)	136,691
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(6,500)	2,010
INCREASE IN CASH AND CASH EQUIVALENTS	40,214	47,093
CASH AND CASH EQUIVALENTS, beginning of period	196,635	157,121
CASH AND CASH EQUIVALENTS, end of period	236,849	204,214
Non-cash financing activities:
Property, plant and equipment purchased on accounts payable	(5,298)	2,656
Acquisition:
Fair value of assets acquired		247,012
Liabilities assumed		(92,277)
Cash acquired		(29,819)
Net assets acquired		$ 124,916