CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Activities
Net income	$ 18,477	$ 26,513	$ 65,633
Adjustments to reconcile net income to net cash provided by operating activities, net of effects of acquisitions:
Depreciation	78,482	71,504	68,857
Amortization of intangibles	20,483	8,596	7,914
Amortization of debt issuance costs	1,889	660	531
Share-based compensation	14,029	18,970	14,104
Excess tax benefit from share-based compensation	(1,078)	(829)	(6,018)
Loss (gain) on disposal of property, plant and equipment	1,091	1,440	(963)
Gain (loss) on securities carried at fair value		(400)	(1,364)
Deferred income taxes	(15,978)	1,484	(3,611)
Other	1,811	(135)	3,624
Changes in operating assets:
Accounts receivable	533	(9,710)	1,810
Inventories	5,176	(2,165)	(2,750)
Prepaid expenses and other current assets	2,456	12,115	(10,537)
Changes in operating liabilities:
Accounts payable	2,640	(8,617)	(9,512)
Accrued liabilities	(3,158)	8,365	2,187
Other liabilities	(8,623)	(1,015)	(3,584)
Income taxes payable	6,512	(8,665)	7,951
Net cash provided by operating activities	124,742	118,111	134,272
Investing Activities
Acquisitions, net of cash acquired		(348,887)
(Increase) decrease in restricted cash	(944)	786	2,872
Purchases of short-term investments	(23,459)	(57,878)	(18,839)
Sales of short-term investments	56,168	75,834	29,583
Purchases of equity securities		(4,553)	(1,842)
Proceeds from sale of equity securities		8,652	1,660
Purchases of property, plant and equipment	(58,549)	(133,244)	(57,766)
Proceeds from sales of property, plant and equipment	156	143	1,480
Other	(723)	(299)	84
Net cash used in investing activities	(27,351)	(459,446)	(42,768)
Financing Activities
Advance on lines of credit and short-term debt	9,000	1,228	6,778
Repayments on lines of credit and short-term debt	(9,000)	(4,287)	(11,400)
Taxes related to net share settlement	(2,528)
Net proceeds from the issuance of common stock	120	10,192	5,761
Excess tax benefit from share-based compensation	1,078	829	6,018
Proceeds from long-term debt	43,500	391,200
Debt issuance costs	(2,045)	(1,270)
Repayments of long-term debt	(79,913)	(65,986)	(42,677)
Repayments of capital lease obligations	(19)	(218)	(246)
Purchase of treasury stock	(18,014)	(11,009)
Dividend distribution to noncontrolling interest	(4,869)		(1,336)
Other	(768)	683	1,343
Net cash provided by (used in) financing activities	(63,458)	321,362	(35,759)
Effect of exchange rate changes on cash and cash equivalents	(4,566)	(4,592)	(9,380)
(Decrease) increase in cash and cash equivalents	29,367	(24,565)	46,365
Cash and cash equivalents, beginning of year	218,435	243,000	196,635
Cash and cash equivalents, end of year	247,802	218,435	243,000
Cash paid during the year for:
Interest	11,708	2,799	3,276
Income taxes	17,099	17,229	14,059
Non-cash activities:
Property, plant and equipment purchased on accounts payable	6,393	(4,498)	(1,167)
Acquisition:
Fair value of assets acquired		496,625
Fair value of liabilities assumed		(88,284)
Less cash acquired		(54,774)
Net assets acquired		353,567
Pericom
Non-cash activities:
Share-based awards issued		$ (4,680)
Noncontrolling Interest
Non-cash activities:
Dividend accrued for noncontrolling interest	$ (915)		$ (1,336)