CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities
Net cash provided by operating activities	$ 74,935	$ 98,453
Cash flows from investing activities
(Increase) decrease in restricted cash	(311)	527
Purchases of property, plant and equipment	(47,054)	(94,994)
Proceeds from sales of property, plant, and equipment	84	129
Purchase of equity securities		(4,553)
Proceeds from sales of equity securities		3,968
Purchases of short-term investments	(17,482)	(36,784)
Proceeds from maturity of short-term investments	46,352	23,156
Purchase of TF Semiconductor Solutions, net of cash acquired		(1,033)
Other	(1,400)	304
Net cash and cash equivalents used in investing activities	(19,811)	(109,280)
Cash flows from financing activities
Advances on lines of credit and short-term debt	9,000	1,713
Taxes paid related to net share settlement	(2,528)
Repayments on lines of credit and short-term debt	(9,000)	(2,512)
Debt issuance costs	(435)	(1,158)
Proceeds from long-term debt	23,500
Repayments of long-term debt	(70,714)	(47,216)
Net proceeds from issuance of common stock	5	9,906
Repayment of capital lease obligation and other	(4,116)	(178)
Net cash and cash equivalents used in financing activities	(54,288)	(39,445)
Effect of exchange rate changes on cash and cash equivalents	1,255	(3,973)
Increase (decrease) in cash and cash equivalents	2,091	(54,245)
Cash and cash equivalents, beginning of period	218,435	243,000
Cash and cash equivalents, end of period	220,526	188,755
Non-cash financing activities:
Property, plant and equipment purchased on accounts payable	$ 7,459	(24,907)
Acquisition of TF Semiconductor Solutions:
Total assets acquired		8,697
Total liabilities assumed		$ 86