ATMI (ATMI) 10-K 7 Mar 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Jan. 31, 2014	Jun. 30, 2013
Document And Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	31-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Entity Registrant Name	'ATMI INC	'	'
Entity Central Index Key	'0001041577	'	'
Trading Symbol	'atmi	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Filer Category	'Accelerated Filer	'	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Public Float	'	'	$660,966,000
Entity Common Stock, Shares Outstanding	'	33,101,335	'

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'	'
Cash and cash equivalents	$82,646	$83,709
Marketable securities, current portion	46,201	70,397
Accounts receivable, net of allowances of $883 and $881, respectively	58,009	53,684
Inventories, net	76,485	77,012
Income taxes receivable	4,778	0
Deferred income taxes	12,814	4,450
Prepaid expenses	11,232	11,838
Other current assets	10,554	8,025
Assets held for sale	120,618	101,051
Total current assets	423,337	410,166
Property, plant, and equipment, net	120,462	111,720
Goodwill	13,657	13,653
Other intangibles, net	18,386	21,178
Marketable securities, non-current	2,225	12,073
Deferred income taxes, non-current	1,433	12,516
Other non-current assets	16,720	17,847
Total assets	596,220	599,153
Liabilities and stockholders’ equity	'	'
Accounts payable	27,087	35,847
Accrued liabilities	6,541	6,953
Accrued salaries and related benefits	3,793	4,311
Income taxes payable	1,668	16,240
Other current liabilities	3,509	3,792
Liabilities held for sale	13,108	12,377
Total current liabilities	55,706	79,520
Deferred income taxes, non-current	2,247	165
Other non-current liabilities	9,107	12,192
Commitments and contingencies (Note 13)	'	'
Stockholders’ equity:	'	'
Preferred stock, par value $.01 per share: 2,000 shares authorized; none issued	0	0
Common stock, par value $.01 per share: 100,000 shares authorized; 42,093 and 41,549 issued and 32,974 and 33,056 outstanding in 2013 and 2012, respectively	411	405
Additional paid-in capital	470,886	457,669
Treasury stock at cost (9,119 and 8,493 shares in 2013 and 2012, respectively)	-251,577	-237,170
Retained earnings	300,909	270,744
Accumulated other comprehensive income	8,531	15,628
Total stockholders’ equity	529,160	507,276
Total liabilities and stockholders’ equity	$596,220	$599,153

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Accounts receivable, allowances	$883	$881
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	42,093,000	41,549,000
Common stock, shares outstanding	32,974,000	33,056,000
Treasury stock, shares	9,119,000	8,493,000

Consolidated_Statements_Of_Ope

Consolidated Statements Of Operations (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]	'	'	'
Revenues	$360,959	$365,849	$351,823
Cost of revenues	185,013	179,258	181,101
Gross profit	175,946	186,591	170,722
Operating expenses:	'	'	'
Research and development	55,666	47,286	46,767
Selling, general and administrative	72,884	73,521	68,711
Contract termination	0	0	84,590
Total operating expenses	128,550	120,807	200,068
Operating income (loss)	47,396	65,784	-29,346
Interest income	944	900	1,110
Impairment of investments	0	0	-776
Other income (expense), net	2,616	-58	-217
Income (loss) before income taxes	50,956	66,626	-29,229
Provision (benefit) for income taxes	12,197	18,331	-18,265
Income (loss) from continuing operations	38,759	48,295	-10,964
Loss from discontinued operations, net of taxes	-8,594	-5,965	-9,055
Net income (loss)	$30,165	$42,330	($20,019)
Basic earnings (loss) per common share	'	'	'
Earnings (loss) per common share from continuing operations (in dollars per share)	$1.21	$1.51	($0.35)
Loss per common share from discontinued operations (in dollars per share)	($0.27)	($0.19)	($0.29)
Weighted average shares outstanding — basic (in shares)	31,911	31,931	31,703
Diluted earnings (loss) per common share	'	'	'
Earnings (loss) per common share from continuing operations (in dollars per share)	$1.18	$1.48	($0.35)
Loss per common share from discontinued operations (in dollars per share)	($0.26)	($0.18)	($0.29)
Weighted average shares outstanding — diluted (in shares)	32,751	32,664	31,703

Consolidated_Statements_Of_Com

Consolidated Statements Of Comprehensive Income (Loss) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Net income (loss)	$3,844	$8,448	$9,447	$8,426	$12,620	$14,425	$11,423	$3,862	$30,165	$42,330	($20,019)
Other comprehensive income (loss), net of tax	'	'	'	'	'	'	'	'	'	'	'
Cumulative translation adjustment	'	'	'	'	'	'	'	'	1,703	5,230	-3,097
Reclassification adjustment related to marketable securities sold in net unrealized gain position, net of $1,625, $495, and $0 tax provision, respectively.	'	'	'	'	'	'	'	'	-3,489	854	-1
Change in fair value on available-for-sale securities, net of deferred income tax of $3,215, $326, and $4,351, respectively.	'	'	'	'	'	'	'	'	-5,592	397	7,119
Reclassification adjustment related to the settlement of derivative financial instruments in a net unrealized gain position, net of $455 tax provision, respectively.	'	'	'	'	'	'	'	'	-799	0	0
Change in fair value of derivative financial instruments, net of deferred income tax of $615 and $636, respectively.	'	'	'	'	'	'	'	'	1,080	1,098	0
Comprehensive income (loss)	'	'	'	'	'	'	'	'	$23,068	$49,909	($15,998)

Consolidated_Statements_Of_Com1

Consolidated Statements Of Comprehensive Income (Loss) (Parenthetical) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]	'	'	'
Reclassification adjustment related to marketable securities in net unrealized gain position at prior period end, tax	$1,625	($495)	$0
Change in fair value of available-for-sale securities, tax	-3,215	326	4,351
Reclassification adjustment related to the settlement of derivative financial instruments in a net unrealized gain position	455	'	'
Change in fair value of derivative financial instruments, tax	$615	$636	'

Consolidated_Statement_Of_Stoc

Consolidated Statement Of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
In Thousands, unless otherwise specified
Beginning Balance at Dec. 31, 2010	$458,425	$396	$435,840	($230,272)	$248,433	$4,028
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Issuance of common stock pursuant to the exercise of employee stock options	1,266	1	1,265	'	'	'
Purchase of treasury shares	-901	'	'	-901	'	'
Stock-based compensation	7,539	'	7,539	'	'	'
Other	'	2	-2	'	'	'
Net income (loss)	-20,019	'	'	'	-20,019	'
Other comprehensive income (loss)	4,021	'	'	'	'	4,021
Comprehensive income (loss)	-15,998	'	'	'	'	'
Ending Balance at Dec. 31, 2011	450,331	399	444,642	-231,173	228,414	8,049
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Issuance of common stock pursuant to the exercise of employee stock options	4,612	3	4,609	'	'	'
Purchase of treasury shares	-5,997	'	'	-5,997	'	'
Stock-based compensation	8,421	'	8,421	'	'	'
Other	'	3	-3	'	'	'
Net income (loss)	42,330	'	'	'	42,330	'
Other comprehensive income (loss)	7,579	'	'	'	'	7,579
Comprehensive income (loss)	49,909	'	'	'	'	'
Ending Balance at Dec. 31, 2012	507,276	405	457,669	-237,170	270,744	15,628
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Issuance of common stock pursuant to the exercise of employee stock options	5,805	3	5,802	'	'	'
Purchase of treasury shares	-14,407	'	'	-14,407	'	'
Stock-based compensation	7,418	'	7,418	'	'	'
Other	'	3	-3	'	'	'
Net income (loss)	30,165	'	'	'	30,165	'
Other comprehensive income (loss)	-7,097	'	'	'	'	-7,097
Comprehensive income (loss)	23,068	'	'	'	'	'
Ending Balance at Dec. 31, 2013	$529,160	$411	$470,886	($251,577)	$300,909	$8,531

Consolidated_Statement_Of_Stoc1

Consolidated Statement Of Stockholders' Equity (Parenthetical)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Stockholders' Equity [Abstract]	'	'	'
Issuance of common stock pursuant to the employee stock purchase plan, shares	328	259	71
Purchase of treasury shares	626	299	48

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating activities	'	'	'
Net income (loss)	$30,165	$42,330	($20,019)
Adjustments to reconcile net income (loss) to cash provided by (used for) operating activities:	'	'	'
Depreciation and amortization	28,832	27,580	27,162
Deferred income taxes	9,900	3,049	-29,443
Stock-based compensation expense	7,418	8,421	7,539
Non-cash royalty	0	-2,600	0
Long-lived asset impairments	11,708	796	594
Impairment of investments	0	0	776
Other	-2,358	-962	604
Changes in operating assets and liabilities:	'	'	'
Accounts receivable	-7,108	-9,179	3,986
Inventories	-6,241	-14,913	-12,390
Other assets	-1,172	3,988	-8,233
Accounts payable	-8,519	17,243	-161
Accrued expenses, income taxes and other liabilities	-18,210	15,209	-1,377
Net cash provided by (used for) operating activities	44,415	90,962	-30,962
Investing activities	'	'	'
Capital expenditures	-43,864	-29,333	-20,703
Purchases of marketable securities	-113,973	-107,132	-86,448
Proceeds from sales or maturities of marketable securities	135,458	106,535	121,755
Acquisitions of assets and investments	-12,480	-11,147	-6,746
Intangible rights acquired due to contract termination, net	0	0	-10,410
Other	57	117	81
Net cash used for investing activities	-34,802	-40,960	-2,471
Financing activities	'	'	'
Purchases of treasury stock	-14,407	-5,997	-901
Proceeds from exercise of stock options	6,039	4,612	1,266
Other	414	549	14
Net cash (used for) provided by financing activities	-7,954	-836	379
Effects of exchange rate changes on cash and cash equivalents	-2,263	2,361	-1,071
Net increase (decrease) in cash and cash equivalents	-604	51,527	-34,125
Cash and cash equivalents, beginning of period	86,050	34,523	68,648
Cash and cash equivalents, end of period	85,446	86,050	34,523
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:	'	'	'
Cash interest paid	86	145	45
Cash income taxes paid	$28,811	$5,675	$11,343

Organization_and_Summary_of_Si

Organization and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Organization and Summary of Significant Accounting Policies	'
	Organization and Summary of Significant Accounting Policies
	Description of Business
	ATMI, Inc. (together with its subsidiaries, collectively referred to as the “Company,” “ATMI,” or “we”) believes it is among the leading suppliers of high performance materials, materials packaging and materials delivery systems used worldwide in the manufacture of microelectronics devices. Our products consist of “front-end” semiconductor performance materials, sub-atmospheric pressure gas delivery systems for safe handling and delivery of toxic and hazardous gases to semiconductor process equipment, high-purity materials packaging and dispensing systems that allow for the reliable introduction of low volatility liquids and solids to microelectronics processes. ATMI targets semiconductor and flat-panel display manufacturers, whose products form the foundation of microelectronics technology rapidly proliferating through the consumer products, information technology, automotive, and communications industries. The market for microelectronics devices is continually changing, which drives demand for new products and technologies at lower cost. ATMI’s customers include many of the leading semiconductor manufacturers in the world who target leading edge technologies. ATMI’s objective is to meet the demands of our microelectronics customers with solutions that maximize the efficiency of their manufacturing processes, reduce capital or operating costs, and minimize the time to develop new products and integrate them into their processes.
	Consolidation
	The consolidated financial statements include the accounts of all subsidiaries where control exists. Equity investments generally consist of 20 percent to 50 percent owned operations which by definition demonstrate significant influence and instances where the Company through voting and similar rights can exercise significant influence. Operations less than 20 percent owned, where the Company does not exercise significant influence, are generally carried at cost. Earnings from equity investments are reported, net of income taxes, within the caption, “Other income (expense), net” on the consolidated statements of operations. Intercompany transactions have been eliminated.
	Use of Estimates
	The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, and expenses. While actual results could differ, management believes such estimates to be reasonable.
	Revenue Recognition and Accounts Receivable
	We recognize revenue when the following four criteria are met: (1) persuasive evidence of an arrangement exists; (2) delivery has occurred or services have been rendered; (3) the fee is fixed or determinable; and (4) collectability is reasonably assured. Revenues from product sales are generally recognized upon delivery to a common carrier when terms are equivalent to free-on-board (“FOB”) origin and upon receipt by a customer when terms are equivalent to FOB destination. In instances where final acceptance of equipment is specified by the purchase agreement, revenue is deferred until all acceptance criteria have been satisfied, except when reasonable reserves for returns can be effectively established due to substantial successful installation history for homogenous transactions. Should changes in conditions cause management to determine these criteria are not met for certain future transactions, revenue recognized for any reporting period could be adversely affected. We accrue for sales returns, warranty costs, and other allowances based on a current evaluation of our experience based on stated terms of the transactions.
	Prior to October 31, 2011, we used Matheson as our exclusive contract manufacturer and distribution partner for the manufacture and distribution of our Safe Delivery Source® (“SDS”) products (the “Licensed Products”). Under the terms of the original manufacturing agreement, ATMI retained the right to manufacture 25 percent of all Licensed Products, while Matheson had the right to manufacture 75 percent of all Licensed Products. Upon completion of manufacture, ATMI purchased all Licensed Products produced by Matheson. Under the terms of the distribution agreement, we received payment from Matheson based upon a formula which was dependent on the sale price obtained by Matheson from its customers. ATMI recognized revenue from the sale of Licensed Products to Matheson when Matheson sold the Licensed Products to its customers, because that is when the sales price became fixed and determinable. On October 31, 2011, we terminated the agreements with Matheson for manufacturing, marketing, selling and/or distributing of our SDS products (“SDS Direct transaction”). Matheson provided support services to ATMI during a transition period. Subject to such continuing services, ATMI assumed control of all manufacturing, distribution, logistics and sales services, which Matheson had provided globally prior to execution of the Termination Agreement, other than the distribution of the SDS and VAC product lines in Japan, which services continue to be provided by Matheson’s parent company, Taiyo Nippon Sanso Corporation (“TNSC”). We recognize revenue to TNSC when all the revenue recognition criteria are met, which is upon shipment. In those regions where Matheson was involved in distributing products during the transition period in the first half of 2012, revenues were recognized only after sale of the Licensed Products to the end users.
	During the years ended December 31, 2013, 2012 and 2011, ATMI recognized $0.2 million, $6.9 million, and $65.8 million of revenues from Matheson, respectively. The decline in revenue from Matheson in 2012 and 2013 is a result of the SDS Direct transaction. During the years ended December 31, 2013, 2012 and 2011, ATMI recognized revenues from Taiwan Semiconductor Manufacturing Corporation (“TSMC”), of $53.8 million, $48.1 million, and $32.0 million, respectively. During the years ended December 31, 2013, 2012 and 2011, ATMI recognized revenues from Samsung, a leading global integrated circuit manufacturer of $50.7 million, $57.3 million, and $47.6 million, respectively. During the years ended December 31, 2013, 2012 and 2011, ATMI recognized revenues from United Microelectronics Corporation (“UMC”), of $37.7 million, $44.7 million, and $48.7 million, respectively.
	Billings to customers for shipping and handling are included in revenues. Costs incurred for shipping and handling of products are charged to cost of revenues. Credit is extended to customers based on an evaluation of each customer’s financial condition; generally, collateral is not required. Revenues are presented in the consolidated financial statements net of sales allowances and discounts. Accounts receivable are presented in the consolidated financial statements net of the allowance for doubtful accounts. Taxes collected from customers and remitted to governmental authorities are presented on a net basis; and they are excluded from revenues.
	Accounts Receivable Allowances
	The allowance for doubtful accounts is established to represent our best estimate of the net realizable value of the outstanding accounts receivable balances. We estimate our allowance for doubtful accounts based on past due amounts and historical write-off experience, as well as trends and factors surrounding the credit risk of the markets we operate in and the financial viability of specific customers. In an effort to identify adverse trends, we assess the financial health of the markets we operate in and perform periodic credit evaluations of our customers and ongoing reviews of account balances and aging of receivables. Amounts are considered past due when payment has not been received within the time frame of the credit terms extended. Write-offs are charged directly against the allowance for doubtful accounts and occur only after all collection efforts have been exhausted.
	Concentrations of Credit Risk
	Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities, accounts receivable, and currency forward exchange contracts. We invest our cash and cash equivalents and marketable securities in bank deposits, time deposits, money market securities, equity securities, corporate debt obligations, and government and government-sponsored enterprise bond obligations. The Company had amounts due from two customers that accounted for approximately 32 percent of accounts receivable at December 31, 2013 and amounts due from one customer that accounted for approximately 20 percent of accounts receivable at December 31, 2012.
	Research and Development
	Costs associated with the development of new products and improvements to existing products are charged to expense as incurred.
	Cash and Cash Equivalents and Marketable Securities
	Highly liquid investments with maturities of three months or less, when acquired, are classified as cash and cash equivalents. Investments in publicly traded securities with maturities greater than three months, when acquired, are classified as marketable securities.
	All of the Company’s marketable securities are classified as available-for-sale as of the balance sheet date and are reported at fair value, with unrealized gains and losses included in stockholders’ equity as a component of accumulated other comprehensive income, net of applicable taxes. We regularly review the fair value of marketable security declines below amortized cost to evaluate whether the decline is other-than-temporary. In making this determination, the Company considers all available evidence including, among other things, considering the duration and extent of the decline and the economic factors influencing the market to determine if the fair value will recover to equal or exceed the amortized cost. If we determine that the fair value will not recover, an other-than-temporary impairment is recognized, net of applicable taxes.
	In 2012, we sold our only auction-rate security for $4.2 million resulting in a recognized loss of $0.5 million, which is included in the consolidated statements of operations in the caption “Other expense, net.”
	Marketable securities that are in a temporarily impaired position, where management has the ability and intent to hold until anticipated recovery or maturity, are classified as either current or non-current based on the remaining contractual maturity of the security. Those securities in a temporarily impaired position with contractual maturities greater than one year are classified as non-current.
	As part of our ongoing cash management optimization efforts during 2013, the Company purchased South Korean time deposits which were classified as marketable securities. At December 31, 2013 and 2012, the Company had $13.3 million and $16.9 million, respectively, of time deposits in South Korea.
	As of December 31, 2013, we had $26.5 million of cash and cash equivalents in South Korea, $6.0 million of cash and cash equivalents in Taiwan and $1.9 million in cash and cash equivalents in Japan, which were not available to fund domestic US operations without repatriation. These funds could become subject to additional tax if they are repatriated. It is not practicable to estimate the amount or timing of the additional tax, if any, that eventually might be paid on these foreign funds. We do not anticipate repatriating these funds in the foreseeable future. Refer to Note 17 for a discussion of restrictions related to the merger agreement with Entegris which could limit or restrict our ability to transfer funds from our subsidiaries should the need arise.
	Non-marketable Equity and Debt Securities
	We selectively invest in non-marketable equity securities of private companies, which range from early-stage companies that are often still defining their strategic direction to more mature companies whose products or technologies may directly support an ATMI product or initiative. Our non-marketable equity investments are recorded using cost basis or the equity method of accounting, depending on the facts and circumstances of each investment. At December 31, 2013, the carrying value of our portfolio of strategic investments in non-marketable equity securities totaled $6.6 million ($6.6 million at December 31, 2012), of which, $4.0 million are accounted for at cost ($4.0 million at December 31, 2012) and $2.6 million are accounted for using the equity method of accounting ($2.6 million at December 31, 2012). In certain instances, we loan funds to early-stage investees at market interest rates to enable them to focus on product and technology development. At December 31, 2013, we had $0.6 million in outstanding loans and accrued interest ($0.2 million at December 31, 2012). Non-marketable equity and debt securities are included in the consolidated balance sheets under the caption “Other non-current assets.” ATMI’s share of the income or losses of all equity-method investees, using the most current financial information available, which is typically one month behind ATMI’s normal closing date, is included in our results of operations from the investment date forward.
	Investments in non-marketable equity securities are inherently risky, and some of these companies are likely to fail. Their success (or lack thereof) is dependent on product development, market acceptance, operational efficiency, attracting and retaining talented professionals, and other key business success factors. In addition, depending on their future prospects, they may not be able to raise additional funds when needed or they may receive lower valuations, with less favorable investment terms than in previous financings, and the investments would likely become impaired.
	We review our investments quarterly for indicators of impairment; however, for non-marketable equity securities, the impairment analysis may require significant judgment to identify events or circumstances that would likely have a significant adverse effect on the fair value of the investment. The indicators that we use to identify those events or circumstances include (a) the investee’s revenue and earnings trends relative to predefined milestones and overall business prospects, (b) the technological feasibility of the investee’s products and technologies, (c) the general market conditions in the investee’s industry or geographic area, including adverse regulatory or economic changes, (d) factors related to the investee’s ability to remain in business, such as the investee’s liquidity, and the rate at which the investee is using its cash, and (e) the investee’s receipt of additional funding at a lower valuation.
	Investments identified as having an indicator of impairment are subject to further analysis to determine if the investment is other-than-temporarily impaired, in which case we write the investment down to its fair value, using the framework required by Accounting Standards Codification (“ASC”) 820 “Fair Value Measurements and Disclosures.” When an investee is not considered viable from a financial or technological point of view, we write down the entire investment balance to zero since we consider the estimated fair market value to be nominal. If an investee obtains additional funding at a valuation lower than our carrying amount or requires a new round of equity funding to stay in operation and the new funding does not appear imminent, we presume that the investment is other-than-temporarily impaired, unless specific facts and circumstances indicate otherwise. There were no impairments recognized in our portfolio of non-marketable equity securities in 2013, 2012, or 2011.
	In July 2005, ATMI made an investment in Anji Microelectronics Co., Ltd. (“Anji”), an entity in the development stage of researching and developing advanced semiconductor materials, with primary operations in Shanghai, China. We have determined that Anji is a variable interest entity. However, we have determined that we are not the primary beneficiary of Anji because we do not have the power, through voting or similar rights, to direct the activities of Anji that most significantly impact the entity’s economic performance, and we are also not expected to absorb significant losses or gains from Anji. ATMI’s carrying value of this cost basis investment is $3.9 million at December 31, 2013. The carrying value of our investment in Anji represents the cash paid, less our share of the cumulative losses during the period we used the equity-method of accounting. At December 31, 2013, our maximum exposure to loss is our carrying value in this investment of $3.9 million.
	Inventories
	Inventories are stated at the lower of cost or market, using the first-in, first-out (“FIFO”) method. Finished goods and work in process inventories include direct material, direct labor and manufacturing overhead costs. Inventory valuation reserves are established in order to report inventories at the lower of cost or market value on our consolidated balance sheets. The determination of inventory valuation reserves requires management to make estimates and judgments on the future salability of inventories. Valuation reserves for excess, obsolete, and slow-moving inventory are estimated by comparing the inventory levels of individual parts to both future sales forecasts or production requirements and historical usage rates in order to identify inventory where the resale value or replacement value is less than inventory cost. Other factors that management considers in determining these reserves include whether individual inventory parts or chemicals meet current specifications and cannot be substituted for or reworked into a part currently being sold or used as a service part, overall market conditions, and other inventory management initiatives.
	As of December 31, 2013 and 2012, we had $2.9 million of inventory valuation reserves recorded.
	Property, Plant, and Equipment, net
	Property, plant, and equipment are carried at cost, net of accumulated depreciation. Depreciation is calculated on the straight-line method based on the estimated useful lives of the assets, which range from 3 to 35 years (see Note 6). The estimated useful life represents the projected period of time that the asset will be productively employed by the Company and is determined by management based on many factors, including historical experience with similar assets and technological life cycles. Circumstances and events relating to these assets are monitored to ensure that changes in asset lives or impairments are identified and prospective depreciation expense or impairment expense is adjusted accordingly. The depreciation periods used are: buildings, 5 to 35 years; machinery and equipment, 3 to 15 years; software, 5 to 10 years; cylinders and canisters, 7 to 15 years; furniture and fixtures, 5 years; and leasehold improvements, over the lesser of the lease term or estimated useful life. We use accelerated depreciation methods for tax purposes where appropriate.
	Asset-Retirement Obligations
	An asset-retirement obligation (“ARO”) is recognized in the period in which sufficient information exists to determine the fair value of the liability with a corresponding increase to the carrying amount of the related property, plant, and equipment which is then depreciated over its useful life. The liability is initially measured at fair value and then accretion expense is recorded in each subsequent period. Refer to Note 8 for further discussion on leases.
	Income Taxes
	Current income taxes are determined based on estimated taxes payable or refundable on tax returns for the current year. Deferred income taxes are determined using enacted tax rates for the effect of temporary differences between the book and tax bases of recorded assets and liabilities. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company recognizes the benefit of an income tax position only if it is more likely than not (greater than 50 percent) that the tax position will be sustained upon tax examination, based solely on the technical merits of the tax position. Otherwise, no benefit can be recognized. The tax benefits recognized are measured based on the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement. We adjust these unrecognized tax benefits, including any impact on the related interest and penalties, in light of changing facts and circumstances. A number of years may elapse before a particular matter for which we have established an unrecognized tax benefit is audited and fully resolved. Additionally, the Company accrues interest and related penalties, if applicable, on all tax exposures for which reserves have been established consistent with jurisdictional tax laws, which is included in income tax expense. Refer to Note 9 for more information and disclosures on income taxes.
	Fair Value of Financial Instruments
	The Company measures and reports financial assets and financial liabilities on a fair value basis, consistent with ASC 820 “Fair Value Measurements and Disclosures,” using the following three categories for classification and disclosure purposes:
	Level 1 — Quoted prices in active markets for identical assets and liabilities. Level 1 assets and liabilities consist of cash, money market fund deposits, time deposits, certain of our marketable equity instruments, and forward foreign currency exchange contracts that are traded in an active market with sufficient volume and frequency of transactions.
	Level 2 — Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets with insufficient volume or infrequent transactions (less active markets); or model-derived valuations in which all significant inputs are observable or can be derived principally from or corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets include certain of our marketable debt instruments with quoted market prices that are traded in less active markets or priced using a quoted market price for similar instruments.
	Level 3 — Unobservable inputs to the valuation methodology that are significant to the measurement of fair value of assets or liabilities.
	Refer to Note 3 for more information regarding the details, methods and assumptions used to estimate the fair value of our other financial instruments.
	Foreign Currency Exchange Contracts
	We use forward foreign currency exchange contracts to hedge specific or anticipated exposures relating to intercompany payments (primarily U.S. export sales to subsidiaries at pre-established U.S. dollar prices), intercompany loans, future cash flows and other specific and identified exposures. The terms of the forward foreign currency exchange contracts are matched to the underlying transaction being hedged. Because such contracts are directly associated with identified transactions, they are an effective hedge against fluctuations in the value of the foreign currency underlying the transaction.
	Changes in the fair value of economic hedges are recognized in earnings as an offset to the change in the fair value of the underlying exposures being hedged. The changes in fair value of derivatives that are designated as cash-flow hedges are deferred in accumulated other comprehensive income (loss) and are recognized in earnings when the underlying hedged transaction occurs. Any ineffectiveness is recognized in earnings immediately. We do not enter into derivative instruments for trading or speculative purposes and all of our derivatives were effective throughout the periods reported.
	Counterparties to forward foreign currency exchange contracts are major banking institutions with credit ratings of investment grade or better and no collateral is required. There are no significant risk concentrations. We believe the risk of incurring losses on derivative contracts related to credit risk is remote.
	Goodwill and Other Indefinite-Lived Intangible Assets
	The assets and liabilities of acquired businesses are recorded under the purchase method of accounting at their estimated fair values at the dates of acquisition. Goodwill represents costs in excess of fair values assigned to the underlying net assets of acquired businesses.
	Goodwill and intangible assets deemed to have indefinite lives are not amortized, but are subject to annual impairment testing.
	For reporting units where the qualitative determination does not indicate that it is more likely than not that the fair value of a reporting unit is more than its carrying value, the prescribed two step test is performed. In order to perform the two-step test we would estimate the fair value of a reporting unit based on the best information available as of October 31, 2013, which primarily incorporates management assumptions about expected future cash flows and contemplates other valuation techniques. No goodwill impairment has been recorded to date.
	Other Long-Lived Assets
	We evaluate the potential impairment of other long-lived assets when indicators of impairment are present. If the carrying value of assets exceeds the sum of the undiscounted expected future cash flows, the carrying value of the asset is written down to fair value. We amortize acquired patents and other amortizable intangible assets over their estimated useful lives. All amortizable intangible assets are amortized using the straight-line method over the estimated useful lives of the assets, ranging from 5 to 15 years.
	Intercompany Loans
	In certain circumstances, the Company maintains intercompany agreements with and among our wholly-owned subsidiaries under which funds are provided to subsidiaries to finance general business activities and are of a long-term investment nature. When settlement of these loans is not planned or anticipated in the foreseeable future, and there is no repayment schedule as part of the agreements, we defer translation gains and losses on these loans in Accumulated other comprehensive income in the period in which they arise.
	Translation of Foreign Currencies
	We conduct business in many different currencies and, accordingly, are subject to the inherent risks associated with foreign exchange rate movements. The financial position and results of operations of many of our foreign subsidiaries are measured using the local currency as the functional currency. Foreign currency denominated assets and liabilities are translated into U.S. dollars at the exchange rates existing at the respective balance sheet dates, and income and expense items are translated at the average exchange rates during the respective periods. The aggregate effects of translating the balance sheets of these subsidiaries are deferred as a separate component of Stockholders’ equity.
	Equity-based Compensation
	The Company recognizes compensation expense in its consolidated financial statements for all share-based payments granted based on the fair value on the date of grant. For share-based payments granted with a service period vesting restriction, compensation expense is recognized on a straight-line basis or accelerated attribution method over the awards’ respective vesting period. For share-based payments granted with a performance condition, we accrue compensation expense when we determine it is probable that the awards will be earned. For share-based payments granted with a market condition, expense is recognized using the accelerated attribution method over the awards’ respective vesting period.
	Collaborative Arrangements
ATMI entered into a collaborative development agreement (“CDA”) with an advanced memory integrated circuit manufacturer for the purpose of developing molecules, including chemical precursors, and material systems for next generation semiconductor products. ATMI will use its High Productivity Development platform to collaboratively work with this customer on specific statements of work designed to develop next-generation materials. The agreement, which was signed in September 2011 and expired in August 2012, required the customer to make quarterly payments to ATMI over the contract term. The arrangement has been determined to be a reimbursement of research and development costs and was recognized as a reduction of expense under the caption, “Research and development” in the Consolidated Statements of Operations. We recognized $0.9 million and $2.9 million related to the CDA as of December 31, 2011 and December 31, 2012.
Each CDA we execute will be reviewed based on the unique terms and conditions associated with such arrangement to determine, using applicable accounting guidance, the timing of recognition, whether the arrangement is revenue producing or represents a reimbursement of research and development costs, and the appropriate amounts to be recognized. If an arrangement is determined to be revenue producing, we apply applicable accounting standards to ensure proper timing and amounts of revenue recognition. If an arrangement is determined to represent a reimbursement of research and development costs, we apply accounting standards for reimbursements to ensure proper timing, amounts and classification as an offset to research and development expenses.
Severance Expense
During the first quarter of 2013, we initiated actions to better streamline business activities with our customers and partners and reduce our operational infrastructure. As a result, we recognized $2.6 million of severance expense under the caption, Selling, general & administrative in the consolidated statements of operations. All liabilities associated with this action were settled prior to December 31, 2013.
Recently Adopted Accounting Pronouncements
In December 2011, the FASB issued ASU 2011-11-”Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities” and in January 2013, the FASB issued ASU 2013-01- “Balance Sheet (Topic 210): Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities.” In ASU 2011-11, entities are required to disclose both gross information and net information about both instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. ASU 2013-01 limits the scope of disclosures to derivatives, repurchase agreements and securities lending arrangements. We were required to apply the amendments retrospectively for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. There was no material impact from the adoption of these Updates.
In February 2013, the FASB issued ASU 2013-02-”Comprehensive Income (Topic 220): Reporting of Amounts Reclassified out of Accumulated Other Comprehensive Income.” Substantially all of the information that this Update requires was already disclosed in our financial statements under U.S. GAAP, however, this Update requires additional disclosure about amounts reclassified out of accumulated other comprehensive income and their corresponding effect on net income in one place. We were required to apply the amendments prospectively for annual reporting periods beginning after December 15, 2012. There was no material impact from the adoption of this Update. Refer to Note 12 for the disclosures as a result of adoption of this Update.
Recently Issued Accounting Pronouncements
In July 2013, the FASB issued ASU 2013-11-“Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists.” In this update, entities are required to offset a liability related to an unrecognized tax benefit against a deferred tax asset for a net operating loss carryforward, a similar tax loss or a tax credit carryforward if such settlement is required or expected in the event the uncertain tax position is disallowed. An entity is required to apply the amendments prospectively for annual reporting periods beginning after December 15, 2013, and interim periods within those annual periods. Retrospective application is permitted. We do not anticipate any material impact from this Update.
In January 2013, the FASB issued ASU 2013-05 - “Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity. In this update, an entity will apply the guidance in ASC 830 and recognize CTA in earnings when it ceases to have a controlling financial interest in a subsidiary or group of assets within a consolidated foreign entity and the sale or transfer results in the complete or substantially completed liquidation of the foreign entity in which the subsidiary or group of assets resided. However, when an entity sells either a part or all of its investment in a consolidated foreign entity, it would apply the guidance in ASC 810 and recognize CTA in earnings only if the parent no longer has a controlling financial interest in the foreign entity as a result of the sale. An entity is required to apply the amendments prospectively for annual reporting periods beginning after December 15, 2013, and interim periods within those annual periods. Retrospective application is permitted. We do not anticipate any material impact from this Update.

Discontinued_Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Discontinued Operations	'
	Discontinued Operations
	On December 22, 2013, ATMI, Inc. and certain of its subsidiaries entered into a Share and Asset Purchase Agreement with Pall Corporation, to sell and transfer all assets and liabilities primarily related to the LifeSciences business, including all equity interests held in ATMI BVBA, a company organized under the laws of Belgium, in exchange for cash proceeds of $185 million, subject to customary working capital adjustments. The Company has accounted for this segment as a discontinued operation. The operating results of this segment, including restated prior periods, are shown as a discontinued operation in the consolidated statements of operations. The assets and liabilities of the discontinued operation have been classified separately on the consolidated balance sheets in the current assets and liabilities, respectively. The consolidated statements of cash flows are presented as a combination of continuing and discontinued operations. We continued to operate the LifeSciences business and generate cash flows through the transaction close on February 20, 2014.
	The Company will continue to perform certain services for Pall Corporation for a transition period following the sale of the LifeSciences business as part of an orderly transition. The Company expects the transition period will be no longer than twelve months. The net cash flows expected to be received and paid by the Company related to the transition services during the transition period are not expected to be material.
	Revenues and losses from discontinued operations were as follows (in thousands):
		Year Ended December 31,
		2013			2012			2011
	Revenues	$	49,358		$	41,584		$	38,264
	Loss from discontinued operations before income taxes	(7,845		)	(6,501		)	(9,906		)
	Loss from discontinued operations, net of tax	$	(8,594	)	$	(5,965	)	$	(9,055	)
	The assets and liabilities of the discontinued operations were as follows (in thousands):
		31-Dec-13			31-Dec-12
	Assets:
	Cash and cash equivalents	$	2,800		$	2,342
	Marketable securities	3,050			—
	Accounts receivable, net	9,562			7,122
	Inventories, net	15,874			10,542
	Other current assets	1,924			1,423
	Property, plant and equipment, net	14,267			13,379
	Goodwill, net	33,735			33,178
	Other intangible assets, net	25,248			25,752
	Other non-current assets	14,158			7,313
	Total assets	$	120,618		$	101,051
	Liabilities:
	Accounts payable	$	2,946		$	2,726
	Accrued liabilities	2,630			1,044
	Accrued salaries and related benefits	2,117			1,682
	Other current liabilities	1,240			2,307
	Other non-current liabilities	4,175			4,618
	Total liabilities	13,108			12,377

Fair_Value_Measurements_and_Ma

Fair Value Measurements and Marketable Securities	12 Months Ended
	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]	'
Fair Value Measurements and Marketable Securities	'
	Fair Value Measurements and Marketable Securities
	Assets / Liabilities Measured at Fair Value on a Recurring Basis
	This table summarizes the Company’s assets (liabilities) measured at fair value on a recurring basis at December 31, 2013 (in thousands):
							Fair Value Measured Using
			Total				Quoted				Significant			Significant
							Prices in				Other			Unobservable
							Active				Observable			Inputs
							Markets for				Inputs			(Level 3)
							(Level 1)				(Level 2)
	Cash & cash equivalents		$	82,646			$	82,646			—			—
	Available-for-sale marketable securities
	Common stock		$	12,754			$	12,754			—			—
	Time deposits		$	13,260			$	13,260			—			—
	Corporate debt obligations		$	7,244			—				$	7,244		—
	Government debt obligations		$	12,943			—				$	12,943		—
	Government sponsored enterprise debt obligations		$	2,225			—				$	2,225		—
	Foreign currency exchange contract asset (1)		$	30			$	30			—			—
	Foreign currency exchange contract liability (1)		$	(409	)		$	(409	)		—			—
	(1)	Refer to Note 5 for additional disclosures on Foreign Currency Exchange Contracts
	In 2013, our valuation methodologies were consistent with previous years, and there were no transfers made among the three levels of the valuation hierarchy.
	Assets / Liabilities Measured at Fair Value on a Nonrecurring Basis
	During the fourth quarter of 2013, we completed negotiations with Intermolecular, Inc., which resulted in the discontinuation of site, maintenance, and license support for certain long-lived HPD assets. In accordance with the provisions of ASC 360 “Property, Plant and Equipment”, long-lived assets held and used with a carrying amount of $10.8 million and the related prepaid support fees with a carrying amount of $0.7 million were deemed to be impaired and we recorded a charge to reduce the net book value of the assets to zero, which is included in the caption "Research and development" in the consolidated statements of operations.
	In 2012, we received $2.6 million of research and development equipment as compensation for a royalty agreement with a third party. The fair value of the equipment was determined using Level 3 inputs, including cash flow analysis and also the use of market comparables for similar equipment. The fair value of the equipment is recorded as revenues in the consolidated statements of operations.
	Due to their nature, the carrying value of cash, receivables, and payables approximates fair value.
	Marketable securities include at December 31, (in thousands):
		Cost				2013				Estimated			Cost				2012			Estimated
						Gross				Fair Value							Gross			Fair Value
						Unrealized											Unrealized
						Gain (Loss) (3)											Gain (Loss) (3)
	Securities in unrealized gain position:
	Common stock	$	—			$	—			$	—		$	22,376			$	13,049		$	35,425
	Corporate debt obligations	3,415				6				3,421			4,211				4			4,215
	Government debt obligations (1)	11,393				11				11,404			4,495				14			4,509
	GSE (2) debt obligations	—				—				—			3,501				—			3,501
	U.S. Treasury obligations	—				—				—			4,023				—			4,023
	Subtotal	14,808				17				14,825			38,606				13,067			51,673
	Securities in unrealized loss position:
	Common stock	14,870				(2,116		)		12,754			—				—			—
	Corporate debt obligations	3,824				(1		)		3,823			4,844				(7		)	4,837
	Government debt obligations	1,039				—				1,039			—				—			—
	GSE debt obligations	2,226				(1		)		2,225			8,251				(1		)	8,250
	Subtotal	21,959				(2,118		)		19,841			13,095				(8		)	13,087
	Securities at amortized cost:
	Time deposits	13,260				—				13,260			16,920				—			16,920
	Corporate debt obligations	—				—				—			790				—			790
	Government debt obligations	500				—				500			—				—			—
	Subtotal	13,760				—				13,760			17,710				—			17,710
	Total marketable securities	$	50,527			$	(2,101	)		$	48,426		$	69,411			$	13,059		$	82,470
	(1)	State and municipal government debt obligations.
	(2)	Government sponsored enterprise.
	(3)	Unrealized gains or losses of less than $500 for each category are reflected as a dash.
	We recorded a $2.0 million gain in earnings as a result of sales of Intermolecular, Inc. common stock during 2013. At December 31, 2013 we own Intermolecular, Inc. common shares with a market value of $12.8 million, including a temporary unrealized loss of $2.1 million due to recent declines in market price of their common stock.
	The amortized cost and estimated fair value of available-for-sale securities, by contractual maturity, as of December 31, 2013 are shown below (in thousands); expected maturities may differ from contractual maturities because the issuers of the securities may exercise the right to prepay obligations without prepayment penalties.
		Cost				Estimated
						Fair Value
	Due in one year or less	$	29,779			$	29,789
	Due between one and three years	5,878				5,883
		35,657				35,672
	Common stock	14,870				12,754
		$	50,527			$	48,426
	This table shows the Company’s marketable securities that were in an unrealized loss position at December 31, 2013, and also shows the duration of time the security had been in an unrealized loss position (in thousands):
			Less Than 12 Months								12 Months or Greater							Total
			Fair Value				Unrealized				Fair Value			Unrealized				Fair Value			Unrealized
Losses							Losses							Losses
Common stock		$	12,754			$	(2,116	)		$	—		$	—			$	12,754		$	(2,116	)
Corporate debt obligations		—				—				3,823			(1		)		3,823			(1		)
Government debt obligations		1,039				—				—			—				1,039			—
GSE (1) debt obligations		2,225				(1		)		—			—				2,225			(1		)
Total (2)		$	16,018			$	(2,117	)		$	3,823		$	(1	)		$	19,841		$	(2,118	)
(1)	Government sponsored enterprise.
(2)	As of December 31, 2013, we had 6 securities in an unrealized loss position. We have evaluated the near-term prospects of the investments in relation to the severity and duration of the decline in fair value and based on that evaluation we have concluded that we have the ability and intent to hold these investments until the recovery of fair value.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2013
Inventory Disclosure [Abstract]	'
Inventories	'
	Inventories
	Inventories include at December 31, (in thousands):
		2013			2012
	Raw materials	$	25,216		$	23,972
	Work in process	1,615			799
	Finished goods	52,592			55,127
		79,423			79,898
	Excess and obsolescence reserve	(2,938		)	(2,886		)
	Inventories, net	$	76,485		$	77,012
	As of December 31, 2013, the Company had commitments for inventory purchases of $73.0 million.
	As December 31, 2013 and 2012, respectively, we had $5.5 million and $5.1 million of finished goods inventory residing at non-ATMI consignment locations.

Foreign_Currency_Exchange_Cont

Foreign Currency Exchange Contracts	12 Months Ended
	Dec. 31, 2013
Foreign Currency Derivatives [Abstract]	'
Foreign Currency Exchange Contracts	'
	Foreign Currency Exchange Contracts
	At December 31, 2013, we held foreign currency exchange contracts, not designated as cash flow hedges, with notional amounts totaling $46.0 million of which $32.5 million will be settled in Euros, $1.2 million will be settled in Taiwan Dollars, $6.6 million will be settled in Korean Won, $1.7 million will be settled in Chinese Yuan Renminbi, and $4.0 million will be settled in Japanese Yen. At December 31, 2013, we held forward foreign currency exchange contracts designated as cash flow hedges with notional amounts totaling $11.9 million, which will be settled in Japanese Yen. The cash flow hedges held at December 31, 2013 mature monthly through the fourth quarter of 2014. At December 31, 2013, the accumulated net unrecognized losses that are expected to be reclassified into earnings during the next twelve months is $1.4 million.
	The Company recorded a net loss of $0.5 million for the year ended December 31, 2013, a net gain of $1.7 million for the year ended December 31, 2012, and a net loss of $2.0 million for the year ended December 31, 2011, under the caption “Other expense, net” in the Consolidated Statements of Operations related to changes in the fair value of the foreign currency exchange contract economic hedges. The Company recorded net gains of $0.3 million and $1.1 million for the twelve months ended December 31, 2013 and December 31, 2012, respectively in other comprehensive income related to the change in the fair value of cash flow hedges. Reclassification of deferred gains in other comprehensive income into earnings was $2.8 million for the year ended December 31, 2013 and reclassification of deferred losses in other comprehensive income into earnings was $0.2 million for the year ended December 31, 2012.
	At December 31, 2012, we held foreign currency exchange contracts, not designated as cash flow hedges, with notional amounts totaling $22.6 million, of which $9.0 million were settled in Euros, $4.2 million were settled in Taiwan Dollars, $3.6 million were settled in Japanese Yen, and $5.8 million were settled in Korean Won. At December 31, 2012, we held forward foreign currency exchange contracts designated as cash flow hedges with notional amounts totaling $19.1 million, which were settled in Japanese Yen, and the accumulated net unrecognized losses reclassified into earnings during 2013 was $0.8 million.

Property_Plant_and_Equipment_N

Property, Plant and Equipment, Net	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Property, Plant and Equipment, Net	'
	Property, Plant and Equipment, Net
	Property, plant, and equipment, net, consists of the following (in thousands):
		December 31,
		2013			2012
	Land	$	1,203		$	1,149
	Buildings	30,033			22,109
	Machinery and equipment	121,610			122,043
	Software	26,754			25,122
	Cylinders and canisters	64,091			57,711
	Furniture and fixtures	2,139			1,977
	Leasehold improvements	21,539			18,749
	Construction in progress	21,394			13,448
		288,763			262,308
	Accumulated depreciation and amortization	(168,301		)	(150,588		)
		$	120,462		$	111,720
	Depreciation and amortization expense for property, plant, and equipment for the years ended December 31, 2013, 2012 and 2011 was 20.4 million, 19.9 million, and 20.1 million, respectively.
	Fully depreciated assets, which were no longer in use, of approximately $0.5 million (primarily machinery and equipment and cylinders) and $11.4 million were written off in the years ended December 31, 2013 and 2012, respectively.
	We recognized disposals and impairment losses from property, plant, and equipment of $11.7 million, $0.9 million, and $0.6 million, in the years ended December 31, 2013, 2012 and 2011, respectively. Refer to Note 3 for additional information.
	As of December 31, 2013, the Company had commitments for capital expenditures of $1.4 million.
	This table shows amounts recorded in the consolidated statements of operations related to depreciation expense for property, plant, and equipment (in thousands):
		Year Ended December 31,
		2013			2012			2011
	Cost of revenues	$	9,286		$	8,801		$	8,889
	Research and development	8,111			7,609			7,211
	Selling, general, and administrative	3,039			3,446			4,021
	Total depreciation and amortization	$	20,436		$	19,856		$	20,121

Goodwill_and_Other_Intangibles

Goodwill and Other Intangibles	12 Months Ended
	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Other Intangibles	'
	Goodwill and Other Intangibles
	Goodwill and other intangibles balances at December 31, 2013 and 2012 were (in thousands):
			Goodwill		Patents &			Other			Total Other
					Trademarks						Intangibles
	Gross amount as of December 31, 2012		$	13,653	$	33,404		$	9,784		$	43,188
	Accumulated amortization		—		(20,847		)	(1,163		)	(22,010		)
	Balance at December 31, 2012		$	13,653	$	12,557		$	8,621		$	21,178
	Gross amount as of December 31, 2013		$	13,657	$	33,440		$	9,784		$	43,224
	Accumulated amortization		—		(22,677		)	(2,161		)	(24,838		)
	Balance at December 31, 2013		$	13,657	$	10,763		$	7,623		$	18,386
	Changes in carrying amounts of goodwill and other intangibles for the years ended December 31, 2013 and 2012, respectively, were (in thousands):
			Goodwill		Patents &			Other			Total Other
					Trademarks						Intangibles
	Balance at December 31, 2011		$	13,606	$	7,812		$	11,605		$	19,417
	Acquisitions		—		6,268			—			6,268
	Amortization expense		—		(1,523		)	(967		)	(2,490		)
	Other, including foreign currency translation		47		—			(2,017		)	(2,017		)
	Balance at December 31, 2012		$	13,653	$	12,557		$	8,621		$	21,178
	Amortization expense		—		(1,830		)	(998		)	(2,828		)
	Other, including foreign currency translation		4		36			—			36
	Balance at December 31, 2013		$	13,657	$	10,763		$	7,623		$	18,386
	This table shows amounts recorded in the consolidated statements of operations related to amortization expense for intangibles (in thousands):
			Year Ended December 31,
			2013		2012			2011
	Research and development		399		92			—
	Selling, general, and administrative		2,429		2,398			1,628
	Total amortization		$	2,828	$	2,490		$	1,628
	The approximate amortization expense expected to be recognized related to intangible assets is (in thousands):
	Year	Amount
	2014	$	2,849
	2015	2,849
	2016	2,849
	2017	2,073
	2018	1,417
	Thereafter	6,349
	Total	$	18,386
	In October 2012, ATMI acquired commercial and exclusive intellectual property rights related to certain electronic waste recovery technology. ATMI recorded $6.3 million of intangible assets in the acquisition of which $5.5 million was cash consideration and $0.8 million was the non-cash portion. This asset is being amortized over 15 years. The net book value of the intellectual property rights at December 31, 2013 was $5.8 million.
	In conjunction with the SDS Direct transaction in 2011, we recognized intangible assets of $11.8 million for the reacquired rights ($8.8 million) and a non-competition agreement ($3.0 million) net of liabilities assumed. The useful lives of the reacquired rights and the non-competition agreement are 10 years and 9 years, respectively. In 2012, $2.0 million of purchase price refinements have reduced the initial values recorded as certain fees have been recovered from the seller, resulting in the final intangible asset cost basis of $9.8 million. The net book value of the intangible assets at December 31, 2013 was $7.6 million.
	The license for our distribution rights to Enthone’s copper ECD products, including its ViaForm products, was automatically renewed upon satisfaction of certain conditions in 2013. The net book value of the licensing right at December 31, 2013 was $4.9 million.

Leases

Leases	12 Months Ended
	Dec. 31, 2013
Leases [Abstract]	'
Leases	'
	Leases
	The Company leases office, and manufacturing facilities, certain manufacturing equipment, and land under several operating leases expiring between 2014 and 2034. Rental expense was $3.5 million, $3.4 million, and $3.2 million, for the years ended December 31, 2013, 2012 and 2011, respectively.
	Below is a schedule of future minimum lease payments for operating leases as of December 31, 2013 (in thousands):
		Operating
		Leases
	2014	$	2,760
	2015	2,124
	2016	1,570
	2017	468
	2018	209
	Thereafter	268
	Total minimum lease payments	$	7,399
	We lease two facilities in Danbury, CT. One facility houses our research and development activities and certain of our manufacturing capabilities, and contains approximately 73,000 square feet of space. In December 2010 we exercised a renewal option for the period January 1, 2012 to December 31, 2016. For the period January 1, 2012 to December 31, 2016, the monthly base rent is $47,500. There is one additional five-year renewal period available to ATMI under this lease. We have agreed to certain restoration obligations associated with this facility, which we are accounting for as an asset retirement obligation (“ARO”), associated with the leasehold improvements made to this facility. The discounted fair value of the ARO at December 31, 2013 is $2.8 million.
	The other facility in Danbury, CT is our headquarters, and contains approximately 31,000 square feet of space. In October 2010, we exercised a renewal option for the period January 1, 2012 to December 31, 2016. For the period January 1, 2011 to December 31, 2016, the monthly base rent is $17,606. There is one additional five-year renewal period available to ATMI under this lease.
	Changes in the carrying amounts of the Company’s AROs at December 31, 2013 are shown below (in thousands):
	Balance at December 31, 2012	$	3,574
	Liabilities settled	(8		)
	Liabilities incurred	28
	Accretion expense	54
	Revisions in estimated cash flows	(33		)
	Balance at December 31, 2013	$	3,615
	The ARO liability is included in the consolidated balance sheets under the caption, “Other non-current liabilities.”

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	Pre-tax income (loss) was taxed in these jurisdictions (in thousands):
			Year Ended December 31,
			2013			2012			2011
	Domestic		$	31,561		$	41,970		$	(54,333	)
	Foreign		19,395			24,656			25,104
	Total pre-tax income (loss)		$	50,956		$	66,626		$	(29,229	)
	Significant components of the provision (benefit) for income taxes for the following years ended are (in thousands):
			December 31,
			2013			2012			2011
	Current:
	Federal		$	(3,817	)	$	12,001		$	6,778
	State		271			344			277
	Foreign		5,082			1,638			2,632
	Total current		1,536			13,983			9,687
	Deferred:
	Federal		10,951			3,210			(26,547		)
	State		570			436			(2,070		)
	Foreign		(860		)	702			665
	Total deferred		10,661			4,348			(27,952		)
			$	12,197		$	18,331		$	(18,265	)
	Significant components of the Company’s deferred tax assets and liabilities are (in thousands):
			December 31,
			2013			2012
	Deferred tax assets:
	Accrued liabilities		$	3,624		$	4,581
	Inventory reserves		2,166			2,227
	Net operating loss and tax credit carryforwards		3,369			2,747
	Equity-based compensation		7,929			8,613
	Reacquired rights on contract termination		14,112			27,013
	Other, net		747			96
			31,947			45,277
	Valuation allowance		(574		)	(359		)
			31,373			44,918
	Deferred tax liabilities:
	Depreciation and amortization		(16,146		)	(20,525		)
	Unrealized gain on marketable securities		—			(4,408		)
	Other, net		(3,309		)	(3,184		)
			(19,455		)	(28,117		)
	Net deferred tax assets		$	11,918		$	16,801
	The valuation allowance relates to the realizability of certain U.S. state and foreign net operating losses.
	As of December 31, 2013, the Company had the following deferred tax assets related to net operating loss (“NOLs”) and tax credit carryforwards (in thousands):
						Expiration
	Federal
	-Capital Loss		$	472		2015-2017
			$	472
	State
	-NOLs		478			2014-2033
	-Credits		54			2024-2028
	-Credits		216			None
			$	748
	Foreign
	-NOLs		998			None
	-NOLs		161			2017-2018
	-Credits		990			2017-2018
			$	2,149
	Total		$	3,369
	The reconciliation of income tax expense (benefit) from continuing operations computed at the U.S. federal statutory tax rate to the Company’s tax expense (benefit) is (in thousands):
			For the Year Ended December 31,
			2013			2012			2011
	U.S. statutory rate		$	17,834		$	23,319		$	(10,231	)
	State income taxes		312			507			(1,165		)
	Foreign income taxes		(3,193		)	(6,675		)	(6,144		)
Change in valuation allowance of deferred tax assets		235			388			(347		)
Other, net		(2,991		)	792			(378		)
		$	12,197		$	18,331		$	(18,265	)
We recorded income tax expense of $0.7 million, and income tax benefits of $0.5 million and $0.9 million from discontinued operations for the years ended December 31, 2013, 2012, and 2011.
ATMI has not provided for U.S. federal income and foreign withholding taxes on approximately $88.5 million of undistributed earnings from non-U.S. operations as of December 31, 2013, because such earnings are intended to be reinvested indefinitely outside of the United States. These earnings could become subject to additional tax if they are remitted as dividends, loaned to ATMI, or upon sale of subsidiary stock. It is not practicable to estimate the amount or timing of the additional tax, if any, that eventually might be paid on the foreign earnings.
South Korea has granted the Company an income tax exemption that expires in 2014, including the reduction from 100 percent to 50 percent of the exemption in 2013 and 2014. The exemption applies only to income related to one of the Company’s product lines. The effect of the tax exemption was to reduce income tax expense by $0.9 million, $2.3 million, and $2.8 million for the years ended December 31, 2013, 2012, and 2011. In December 2013, the Company was granted a new tax exemption related to the manufacturing of different product lines at its recently-built JangAn facility; the tax exemption is for a seven year period that is expected to start in 2014.
At December 31, 2013, ATMI had $2.3 million of unrecognized tax benefits which, if recognized, would favorably affect the effective income tax rate in future periods. $0.2 million of this amount is included in deferred taxes, and the balance of $2.1 million is included in the caption “Other non-current liabilities” on the consolidated balance sheets, together with $0.3 million of accrued interest (net) on tax reserves and $0 accrued for penalties. At December 31, 2012, the amount of unrecognized tax benefits (out of a total of $30.6 million), which, if recognized, would have favorably affected the effective income tax rate in future periods, was $3.6 million, $0.6 million of accrued interest (net) on tax reserves and $0 accrued for penalties. At December 31, 2011, the amount of unrecognized tax benefits, which, if recognized, would have favorably affected the effective income tax rate in future periods, was $3.7 million, $0.4 million of accrued interest (net) on tax reserves and $0 accrued for penalties.
The reconciliation of the unrecognized tax benefits (exclusive of interest) at the beginning of 2012 through the end of 2013 is (in thousands):
Ending Balance - December 31, 2011	$	3,656
Increases from prior period positions	27,015
Decreases from prior period positions	(159		)
Increases from current period positions	467
Decreases related to settlements with taxing authorities	(224		)
Decreases from lapse of statute of limitations	(127		)
Ending Balance - December 31, 2012	$	30,628
Increases from prior period positions	359
Decreases from prior period positions	(74		)
Increases from current period positions	454
Decreases related to settlements with taxing authorities	(27,868		)
Decreases from lapse of statute of limitations	(1,163		)
Balance at December 31, 2013	$	2,336
In the next 12 months, the Company does not expect any material decreases to the unrecognized tax benefits for tax positions taken related to previously filed tax returns.
At December 31, 2012, the Company had $27.0 million of unrecognized tax benefits related to the timing of deduction of the reacquired rights due to the Matheson contract termination. This uncertainty was resolved in 2013 as the Internal Revenue Service completed the audit of tax years 2010 and 2011, for which the Company paid $8.2 million (including $0.2 million of interest). Except for interest expense associated with the timing of the payment, since it was an uncertainty related to the timing of the deduction, the reversal of the $27.0 million of unrecognized tax benefits in 2013 had no impact on the income statement or on our effective tax rate. The reversal also resulted in a reclassification between taxes payable and deferred taxes on the balance sheet, to properly reflect in deferred tax assets the future amortization tax effect of the reacquired rights.

Defined_Contribution_Plan

Defined Contribution Plan	12 Months Ended
	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]	'
Defined Contribution Plan	'
	Defined Contribution Plan
	The Company maintains a defined contribution plan (401(k) Plan) covering substantially all of its U.S. employees that is subject to the provisions of the Employee Retirement Income Security Act of 1974. The Company’s matching contributions are discretionary by plan year and were approximately $1.5 million, $1.6 million, and $1.6 million for the years ended December 31, 2013, 2012 and 2011, respectively. The Plan provides for discretionary matching contributions of 100 percent of the first 3 percent of each participant’s eligible compensation plus 50 percent on the next 2 percent of each participant’s eligible compensation, up to statutory limitations. There is no matching contribution above 5 percent of each participant’s eligible compensation.

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stockholders' Equity	'
	Stockholders’ Equity
	This table shows the effect of pre-tax compensation cost arising from equity-based payment arrangements recognized in income (loss) from continuing operations (in thousands):
			December 31,
			2013			2012				2011
	Cost of revenues		$	161		$	232			$	406
	Research and development		476			612				794
	Selling, general, and administrative		6,144			6,954				5,878
	Total equity-based compensation expense		$	6,781		$	7,798			$	7,078
	No equity-based compensation cost was capitalized.
	Summary of Plans
	We currently have two equity-based compensation plans which provide for the granting of up to 4,000,000 shares of common stock pursuant to nonqualified stock options, incentive stock options (“ISOs”), stock appreciation rights, Total Shareholder Return Performance Restricted Stock Units (“TSR PRSU”), and restricted stock awards to employees, directors and consultants of the Company. Stock options typically vest over periods ranging from one to four years with a maximum term of ten years. Restricted stock awards and units typically vest over periods ranging from three to five years. Shares issued as a result of stock option exercises are primarily settled by the issuance of new shares.
	This table shows the number of shares approved by shareholders for each plan and the number of shares that remain available for equity awards at December 31, 2013 (in thousands):
	Stock Plan		# of Shares		# of Shares
			Approved		Available
	2010 Stock Plan (1)		3,000		2,189
	Employee Stock Purchase Plan (2)		1,000		227
	Totals		4,000		2,416
	(1)	Exercise prices for ISOs and non-qualified stock options granted under this plan may not be less than 100 percent of the fair market value for the Company’s common stock on the date of grant.
	(2)	Employees may purchase shares at 95 percent of the closing price on the day previous to the last day of each six-month offering period. This plan is not considered to be compensatory.
	Fair Value
	The Company uses the Black-Scholes-Merton options-pricing model to determine the fair value of stock options under ASC 718 “Compensation – Stock Compensation.” Management is required to make certain assumptions with respect to selected model inputs, including anticipated changes in the underlying stock price (i.e., expected volatility) and option exercise activity (i.e., expected term). For awards granted subsequent to January 1, 2006, expected volatility is based on the historical volatility of ATMI common stock for a period shorter than the expected term of the options. For awards granted in 2010 and 2011, expected volatility is based on the historical volatility of ATMI common stock for a period shorter than the expected term of the options. We have excluded the historical volatility prior to the public announcement regarding the sale of our non-core businesses in 2004, solely because those businesses that were sold represented a significant portion of ATMI’s consolidated business and were subject to considerable cyclicality associated with the semiconductor equipment industry, which drove increased volatility in ATMI’s stock price, which we did not believe would be representative of future expected volatility. The expected term of options granted is derived using historical exercise patterns which represent the period of time that options granted are expected to be outstanding. The risk-free rate is based on the U.S. yield curve in effect at the time of grant for a period commensurate with the estimated expected term. In accordance with ASC 718, in the determination of equity-based compensation cost, the Company estimates the total number of instruments that will be forfeited as a result of a failure to provide the requisite service to earn the award.
	To estimate the fair value of our TSR PRSU’s, we use a Monte-Carlo simulation of future stock prices for ATMI and the components of the Russell 2000 index. This method uses a risk-neutral framework to model future stock prices. The stock price projections are based upon estimates for the risk-free rate of return, the volatility of our stock and the others included in the Russell 2000 index, and the correlation of each stock within the Russell 2000 index. Management is required to make certain judgments for these estimates.
	The weighted-average fair value of options granted during the years ended December 31, 2013, 2012 and 2011 was $10.34, $11.66 and $9.66, respectively, based on the Black-Scholes-Merton options-pricing model. These weighted-average assumptions were used for grants in the periods indicated:
			2013		2012			2011
	Stock option grants:
	Risk free interest rate		1.59	%	1.52	%		3.15	%
	Expected term, in years		7.92		7.87			7.85
	Expected volatility		41	%	42.84	%		43.3	%
	Dividend yield		—	%	—	%		—	%
	The Company uses historical data to estimate forfeitures of awards from employee terminations in order to estimate compensation cost for awards expected to vest. In addition, we separate employees into groups that have similar characteristics for purposes of making forfeiture estimates.
	Stock Option and Restricted Stock Activity
	This table shows the option activity under our current and prior plans as of December 31, 2013 and changes during the year then ended (options are expressed in thousands; averages are calculated on a weighted basis; life in years; intrinsic value expressed in thousands):
			Number		Average				Average		Aggregate
			of		Exercise				Remaining		Intrinsic
			Options		Price				Life		Value
	Outstanding at December 31, 2012		1,528		$	21.98
	Granted		180		$	21.92
	Exercised		(391	)	$	19.87
	Forfeited		(47	)	$	20.65
	Expired		(109	)	27.48
	Outstanding at December 31, 2013		1,161		$	22.22			5.4		$	9,409
	Exercisable at December 31, 2013		822		$	22.57			4.2		$	6,401
	The aggregate intrinsic value represents the difference between the Company’s closing stock price of $30.21 as of December 31, 2013 and the exercise price of the dilutive options at that date, multiplied by the number of dilutive options outstanding at that date. The total intrinsic value of stock options exercised during the years ended December 31, 2013, 2012 and 2011 was $2.4 million, $0.6 million, and $0.1 million, respectively. The total fair value of options which vested during the years ended December 31, 2013, 2012 and 2011 was $1.8 million (184,000 shares), $1.9 million (203,000 shares), and $1.7 million (184,000 shares) respectively.
	There was no income tax deficiency recognized in additional paid-in capital from equity-based compensation for the years ended December 31, 2013, 2012 and 2011 respectively. An income tax deficiency was recognized in income tax expense from equity-based compensation totaling $0.2 million, $0.2 million, and $0.9 million for the years ended December 31, 2013, 2012, and December 31, 2011, respectively.
	This table shows restricted stock activity as of December 31, 2013 and changes during the year then ended (shares are expressed in thousands; averages are calculated on a weighted basis):
			Number		Average
			of		Grant Date
			Shares		Fair Value
	Nonvested at December 31, 2012		1,073		$	18.75
	Granted		340		$	22.47
	Vested		(255	)	$	18
	Forfeited		(152	)	$	19.17
	Nonvested at December 31, 2013		1,006		$	20.14
	The total fair value of restricted stock which vested during the years ended December 31, 2013, 2012 and 2011 was $4.6 million, $5.7 million and $5.3 million, respectively.
	As of December 31, 2013, $2.1 million of unrecognized compensation cost related to non-vested stock options is expected to be recognized over a weighted-average period of approximately 1.6 years. As of December 31, 2013, $8.9 million of unrecognized compensation cost related to restricted stock is expected to be recognized over a weighted-average period of approximately 2.2 years. As of December 31, 2013, $0.6 million of unrecognized compensation cost related to TSR PRSU’s is expected to be recognized over a weighted-average period of approximately 1.2 years.
	Earnings Per Share
	This table shows the computation of basic and diluted earnings per share (in thousands, except per share data):
			2013			2012				2011
	Numerator:
	Income (loss) from continuing operations		$	38,759		$	48,295			$	(10,964	)
	Denominator:
	Denominator for basic earnings per share
	- weighted average shares		31,911			31,931				31,703
Dilutive effect of employee stock options		162			168				—
Dilutive effect of restricted stock		678			565				—
Denominator for diluted earnings per common share – weighted average shares		32,751			32,664				31,703
Earnings (loss) per common share from continuing operations - basic		1.21			1.51				(0.35		)
Earnings (loss) per common share from continuing operations - diluted		1.18			1.48				(0.35		)
This table shows the potential common shares excluded from the calculation of weighted-average shares outstanding because their effect was considered to be antidilutive (in thousands):
		2013		2012			2011
Antidilutive shares		581		1,069			2,144
The Company has never declared or paid cash dividends on its capital stock. Refer to Note 17 for discussion of restrictive covenants related to the Agreement and Plan of Merger with Entegris.
In August 2010, the Company’s Board of Directors approved a share repurchase program for up to $50.0 million of ATMI common stock. The program, which has no expiration date, does not require the Company to purchase any specific number or amount of shares and may be suspended or reinstated at any time at the Company’s discretion and without notice. Under the terms of the share repurchase program, repurchases can be made from time to time in open market transactions at prevailing market prices or in privately negotiated transactions. Management determined the timing and amount of purchases under the repurchase program based upon market conditions or other factors.
Under all the repurchase programs approved by the Company’s Board of Directors, the Company purchased a total of 8,787,077 shares of its common stock at an average price of $27.80 per share. Our merger agreement with Entegris restricts our ability to repurchase shares. Please see Note 17 for further details.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Accumulated Other Comprehensive Income	'
	Accumulated Other Comprehensive Income
	The components of accumulated other comprehensive income are (in thousands):
			Currency				Unrealized			Unrealized			Total
			Translation				Gain (Loss) on			Gain (Loss) on
			Adjustments				Available-for-			Derivative
							Sale Securities			Instruments
	Balance at December 31, 2010		$	4,167			$	(139	)	—			$	4,028
	Reclassification adjustment related to marketable securities in net unrealized gain at prior period end, net of $0 tax provision (1)		—				(1		)	—			(1		)
	Change in fair value of available-for-sale securities, net of deferred income tax of $4,351		—				7,119			—			7,119
	Cumulative translation adjustment		(3,097		)		—			—			(3,097		)
	Balance at December 31, 2011		$	1,070			$	6,979		$	—		$	8,049
	Reclassification adjustment related to marketable securities in net unrealized loss at prior period end, net of $495 tax provision (1)		—				854			—			854
	Change in fair value of available-for-sale securities, net of deferred income tax of $326		—				397			—			397
	Change in fair value of derivative financial instruments, net of deferred income tax of $636		—				—			1,098			1,098
	Cumulative translation adjustment		5,230				—			—			5,230
	Balance at December 31, 2012		$	6,300			$	8,230		$	1,098		$	15,628
	Reclassification adjustment related to marketable securities in net unrealized gain at prior period end, net of $1,625 tax provision (1)		—				(3,489		)				(3,489		)
	Change in fair value of available-for-sale securities, net of deferred income tax of $3,215		—				(5,592		)				(5,592		)
	Reclassification adjustment related to cash flow hedges in net unrealized gain position at prior period end, net of $455 tax provision (1)									(799		)	(799		)
	Change in fair value of derivative financial instruments, net of deferred income tax of $615		—							1,080			1,080
	Cumulative translation adjustment		1,703										1,703
	Balance at December 31, 2013		$	8,003			$	(851	)	$	1,379		$	8,531
	(1)	Determined based on the average cost method.
	The reclassifications out of accumulated other comprehensive income are (in thousands):
	Details about Accumulated Other Comprehensive	Amount Reclassified from				Effect on the Consolidated
	Income Components	Accumulated Other				Statements of Comprehensive Income
		Comprehensive Income
	Realized gains and losses on cash flow hedges
	Foreign exchange contracts	$	1,442			Revenues
		(188		)		Cost of revenues
		1,254				Total before tax
		(455		)		Estimated tax expense
		$	799			Net of estimated tax
	Realized gains and losses on available-for-sale securities
	Available-for-sale securities	$	5,114			Other income (expense), net
		5,114				Total before tax
		(1,625		)		Estimated tax expense
		$	3,489			Net of estimated tax
	Total reclassifications for the period	$	4,288			Net of estimated tax

Commitments_Contingencies_and_

Commitments, Contingencies, and Other	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments, Contingencies, and Other	'
	Commitments, Contingencies, and Other
	ATMI is, from time to time involved in legal actions, governmental audits, and proceedings relating to various matters incidental to its business including contract disputes, intellectual property disputes, product liability claims, employment matters, export and trade matters, and environmental claims. While the outcome of such matters cannot be predicted with certainty, in the opinion of management, after reviewing such matters and consulting with ATMI’s counsel and considering any applicable insurance or indemnifications, any liability which may ultimately be incurred is not expected to materially affect ATMI’s consolidated financial position, cash flows or results of operations.
	On or about February 7 and 28, 2014, two putative class action complaints challenging the Merger were filed in the Superior Court of the State of Connecticut, Judicial District of Danbury, captioned Andrew Pace v. ATMI, Inc., et al. and Dolores Carter v. ATMI, Inc., et al., respectively.  The complaints were filed on behalf of the public shareholders of ATMI and name as defendants ATMI, the members of its Board of Directors, Entegris and Merger Sub.  The complaints generally allege that ATMI’s directors breached their fiduciary duties to ATMI’s shareholders by agreeing to sell ATMI for inadequate and unfair consideration and pursuant to an inadequate and unfair process, and that ATMI, Entegris and Merger Sub aided and abetted those alleged breaches.  The complaint in the Carter action also alleges purported disclosure deficiencies in the preliminary proxy statement for the Merger that ATMI filed with the SEC on February 25, 2014.  The complaints seek, among other things, to enjoin the Merger.  ATMI believes that the claims have no merit and no loss contingency range can be estimated at this time.
	In the fourth quarter of 2012, we executed a ten year arrangement to purchase raw material from a global industrial gas supplier. We are committed to making certain upfront payments and to purchasing minimum volumes of gas thereafter. Purchase commitments beginning in year six are dependent on annual sales volumes. We estimate the total value of the contract to be $60.0 million. Under the contract, we have made payments totaling $3.0 million through December 31, 2013, and estimate the remaining contractual obligations under this agreement to approximate $57.0 million.
	In the first quarter of 2013, we executed a $16.0 million commitment to purchase raw material from a strategic gas supplier over the next two years. We have purchased approximately $8.0 million in raw material as of December 31, 2013, and have remaining commitments under this agreement of approximately $8.0 million.
	In the fourth quarter of 2013, we amended our existing contracts with Intermolecular, Inc. to significantly reduce our license of HPD technology and R&D support services for 2014. Under the amendment, ATMI will pay a fixed fee for a reduced number of HPD tool site licenses and maintenance support. Volume-based royalties to Intermolecular would resume in 2014. Additionally, we are committed to paying $2.6 million and $1.3 million for R&D licenses in 2014 and 2015, respectively, which is down from $6.9 million in 2013.
	ATMI is self-insured for U.S. employee medical claims with stop loss risk insurance.

Segments

Segments	12 Months Ended
	Dec. 31, 2013
Segment Reporting, Measurement Disclosures [Abstract]	'
Segments	'
	Segments
	As a result of the execution of a Share and Asset Purchase Agreement with Pall Corporation, to sell and transfer all assets and liabilities primarily related to the LifeSciences business (refer to Note 2 for additional information) in the fourth quarter of 2013, ATMI’s operations now comprise a single operating segment. The executive team is the chief operating decision maker of ATMI. Discrete financial information is only prepared at the product-line level for revenues and certain direct costs. Functional results are reviewed at the consolidated level.
	ATMI sells high-purity materials and materials delivery systems directly to integrated circuit manufacturers and to chemical suppliers for flat-panel display manufacturing. These products consist of ATMI’s patented Safe Delivery Source® (“SDS”) solutions, copper integration and surface preparation products, deposition materials and high-purity liquid materials packaging solutions. The principal drivers for this market are technical performance, yield improvement, time to market, cost, utilization of capital, and risk reduction. The success of an electronic component or device is determined by the increased functionality it can deliver at an acceptable cost.
	The All Other category includes corporate expenses, and, revenues and expenses associated with early stage new market opportunities such as our eVOLV™ and BrightBlack® technologies.
	Revenues from external customers, by product type, were as follows (in thousands):
		Revenue
		December 31,
		2013		2012		2011
	Implant	$	112,918	$	100,289	$	77,450
	Display	26,206		31,902		34,663
	Photo IC	24,020		24,271		27,033
	Copper Materials	174,890		191,051		193,420
	Other Microelectronics	20,394		18,002		18,851
	All Other	2,531		334		406
	Total Continuing Operations	$	360,959	$	365,849	$	351,823

Geographic_Data

Geographic Data	12 Months Ended
	Dec. 31, 2013
Segments, Geographical Areas [Abstract]	'
Geographic Data	'
	Geographic Data
	The Company’s geographic data for the years ended December 31, 2013, 2012 and 2011 are (in thousands):
		U.S.		Taiwan		Japan		South Korea		China		Other		Europe and		Total
												Pacific Rim		Other
	31-Dec-13
	Revenues	$	59,766	$	99,154	$	40,976	$	74,242	$	38,921	$	25,419	$	22,481	$	360,959
	Long-lived assets	127,377		4,796		783		33,334		2,456		266		213		169,225
	31-Dec-12
	Revenues	$	63,248	$	98,643	$	48,437	$	85,402	$	24,341	$	22,125	$	23,653	$	365,849
	Long-lived assets	136,578		6,409		2,599		18,076		343		152		241		164,398
	31-Dec-11
	Revenues	$	65,990	$	97,289	$	43,292	$	78,777	$	23,651	$	24,215	$	18,609	$	351,823
	Long-lived assets	112,579		6,037		7,872		6,440		355		137		277		133,697
	Revenues are attributed to countries based on the location of the customer. Long-lived assets are located in the respective geographic regions, as shown above. Other than Taiwan, Japan, China, and South Korea, no one specific country within the Pacific Rim, Europe, South America, and other regions accounted for greater than 10 percent of consolidated revenues and long-lived assets in 2013, 2012 and 2011.

Quarterly_Results_of_Operation

Quarterly Results of Operations	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Quarterly Results Of Operations	'
	Quarterly Results of Operations (Unaudited)
	Summarized quarterly results of operations data is as follows (in thousands, except per share amounts):
		Quarter
		First				Second				Third				Fourth
	2013
	Revenues	$	88,126			$	90,064			$	87,925			$	94,844
	Gross profit	42,598				44,169				41,795				47,384
	Operating income	12,201			(a)	15,025				12,956			(c)	7,214			(d)
	Income from continuing operations	$	10,210			$	11,669		(b)	$	10,492			$	6,388		(e)
	Loss from discontinued operations, net of taxes	(1,784		)		(2,222		)		(2,044		)		(2,544		)
	Net income	$	8,426			$	9,447			$	8,448			$	3,844
	Basic income per common share:
	Earnings per common share from continuing operations	$	0.32			$	0.37			$	0.33			$	0.2
	Diluted income per common share:
	Earnings per common share from continuing operations	$	0.31			$	0.36			$	0.32			$	0.19
	2012
	Revenues	83,465				94,745				98,459			(h)	89,180
	Gross profit	41,250			(f)	49,235				51,503				44,603
	Operating income	8,962				18,699			(g)	23,175				14,948
	Income from continuing operations	$	6,357			$	13,172			$	16,857			$	11,909
	Income (loss) from discontinued operations, net of taxes	(2,495		)		(1,749		)		(2,432		)		711
	Net income	$	3,862			$	11,423			$	14,425			$	12,620
	Basic income per common share:
	Earnings per common share from continuing operations	$	0.2			$	0.41			$	0.53			$	0.37
	Diluted income per common share:
	Earnings per common share from continuing operations	$	0.19			$	0.4			$	0.52			$	0.36
	Note: The operating results presented in the table have been restated for prior periods to exclude discontinued operations.
	(a)	Includes $1.8 million of severance costs in order to better streamline business activities with our customers and partners.
	(b)	Includes a $1.1 million gain on sale of marketable securities.
	(c)	Includes $0.8 million of severance costs associated with an action to reduce operational infrastructure with the objective of streamlining operations.
	(d)	Includes a $1.2 million gain on sale of marketable securities.
	(e)	Includes $11.5 million impairment charge related to our HPD assets.
	(f)	Includes $1.5 million capitalization of certain logistics and freight costs into inventory.
	(g)	Includes a $0.5 million recognized loss on the sale of an auction rate security.
	(h)	Includes $2.6 million from IP settlement, which represents the settlement of royalties for periods prior to the third quarter of 2013.

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	Subsequent Events
	On February 20, 2014, we completed the previously announced transaction among ATMI, Inc. and certain of its subsidiaries and Pall Corporation, whereby we sold all assets associated with our LifeSciences business. Cash proceeds from the transaction were $185 million, subject to customary post-closing working capital adjustments. For purposes of this Form 10-K, we have treated the LifeSciences business as a discontinued operation. For additional information refer to Note 2.
	On February 4, 2014, ATMI and Entegris entered into an Agreement and Plan of Merger (the “Merger Agreement”), whereby ATMI would become a wholly-owned subsidiary of Entegris.
	Under the terms of the Merger Agreement, ATMI shareholders will receive $34.00 in cash, without interest or dividends, for each share of ATMI common stock they hold at the time of closing. The consummation of the merger is subject to receiving the approval of holders of a majority of the outstanding ATMI common stock entitled to vote on the merger, the expiration or termination of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and other customary conditions.
	The Merger Agreement includes customary termination provisions for both ATMI and Entegris and provides that, in connection with the termination of the Merger Agreement by Entegris or ATMI, under specified circumstances, ATMI would be required to pay Entegris a termination fee of $30,000,000. In the event the conditions to consummating the merger have been met on the date that the closing of the merger is required to occur but Entegris and Merger Sub fail to consummate the merger, ATMI may terminate the Merger Agreement and, under certain circumstances, Entegris would be required to pay ATMI a termination fee of $100,000,000.
	As part of the Merger Agreement, the parties have agreed to certain customary covenants which restrict ATMI pending the closing of the acquisition. Among these obligations, ATMI: (1) must conduct business in the ordinary course consistent with its past practice; (2) may not repatriate any cash, cash equivalents or other assets to the extent that such repatriation would result in a tax liability to ATMI or any of its subsidiaries beyond what has been agreed to with Entegris; (3) may not make or authorize capital expenditures in any calendar year that, individually or in the aggregate, exceed the amounts budgeted in ATMI's current plan by more than 10%; (4) may not establish a record date or declare a dividend; (5) may not amend its Charter or By-laws; (6) may not issue, sell, encumber, repurchase or grant any capital stock or other equity instrument other than amounts agreed to by Entegris; (7) may not acquire, sell, lease (as lessor), license, mortgage, sell and leaseback or otherwise subject to any lien (other than certain permitted liens), or otherwise dispose of any real property or other material properties or assets, other than that which has been agreed to between the parties; (8) may not incur any indebtedness or issue or sell any debt securities or rights to acquire debt securities except as agreed between the parties; (9) may not make any change in financial accounting methods, principles or practices, or elections, except insofar as required by applicable law or generally accepted accounting principles; and (10) may not adopt a plan of complete or partial liquidation, dissolution, merger or conversion or resolution providing for or authorizing such a liquidation, dissolution, merger or conversion.

Schedule_II_Valuation_And_Qual

Schedule II, Valuation And Qualifying Accounts	12 Months Ended
	Dec. 31, 2013
Valuation and Qualifying Accounts [Abstract]	'
Schedule II - Valuation And Qualifying Accounts	'
	Schedule II—Valuation and Qualifying Accounts
	Three Years Ended December 31, 2013
	(In thousands)
	Allowances for Doubtful Accounts and Sales Returns:
	Balance December 31, 2010	$	783
	Provision charged to income	—
	Doubtful accounts written off (net)	—
	Other adjustments	(2		)
	Balance December 31, 2011	781
	Provision charged to income	100
	Doubtful accounts written off (net)	—
	Other adjustments	—
	Balance December 31, 2012	881
	Provision charged to income	2
	Doubtful accounts written off (net)	—
	Other adjustments	—
	Balance December 31, 2013	$	883
	Allowance for Excess and Obsolete Inventories:
	Balance December 31, 2010	$	1,843
	Provision charged to income	555
	Disposals of inventory written off	(430		)
	Other adjustments	197
	Balance December 31, 2011	2,165
	Provision charged to income	1,560
	Disposals of inventory written off	(748		)
	Other adjustments	(91		)
	Balance December 31, 2012	2,886
	Provision charged to income	1,430
	Disposals of inventory written off	(1,032		)
	Other adjustments	(346		)
	Balance December 31, 2013	$	2,938
	Future Income Tax Benefits – Valuation Allowance:
	Balance December 31, 2010	$	1,983
	Additions charged to income tax expense	284
	Reductions credited to income tax expense	(631		)
	Other adjustments	(318		)
	Balance December 31, 2011	1,318
	Additions charged to income tax expense	388
	Reductions credited to income tax expense	—
	Other adjustments	(1,347		)
	Balance December 31, 2012	359
	Additions charged to income tax expense	235
	Reductions credited to income tax expense	—
	Other adjustments	(20		)
	Balance December 31, 2013	$	574

Organization_and_Summary_of_Si1

Organization and Summary of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Consolidation	'
	Consolidation
	The consolidated financial statements include the accounts of all subsidiaries where control exists. Equity investments generally consist of 20 percent to 50 percent owned operations which by definition demonstrate significant influence and instances where the Company through voting and similar rights can exercise significant influence. Operations less than 20 percent owned, where the Company does not exercise significant influence, are generally carried at cost. Earnings from equity investments are reported, net of income taxes, within the caption, “Other income (expense), net” on the consolidated statements of operations. Intercompany transactions have been eliminated.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, and expenses. While actual results could differ, management believes such estimates to be reasonable
Revenue Recognition and Accounts Receivable	'
	Revenue Recognition and Accounts Receivable
	We recognize revenue when the following four criteria are met: (1) persuasive evidence of an arrangement exists; (2) delivery has occurred or services have been rendered; (3) the fee is fixed or determinable; and (4) collectability is reasonably assured. Revenues from product sales are generally recognized upon delivery to a common carrier when terms are equivalent to free-on-board (“FOB”) origin and upon receipt by a customer when terms are equivalent to FOB destination. In instances where final acceptance of equipment is specified by the purchase agreement, revenue is deferred until all acceptance criteria have been satisfied, except when reasonable reserves for returns can be effectively established due to substantial successful installation history for homogenous transactions. Should changes in conditions cause management to determine these criteria are not met for certain future transactions, revenue recognized for any reporting period could be adversely affected. We accrue for sales returns, warranty costs, and other allowances based on a current evaluation of our experience based on stated terms of the transactions.
	Prior to October 31, 2011, we used Matheson as our exclusive contract manufacturer and distribution partner for the manufacture and distribution of our Safe Delivery Source® (“SDS”) products (the “Licensed Products”). Under the terms of the original manufacturing agreement, ATMI retained the right to manufacture 25 percent of all Licensed Products, while Matheson had the right to manufacture 75 percent of all Licensed Products. Upon completion of manufacture, ATMI purchased all Licensed Products produced by Matheson. Under the terms of the distribution agreement, we received payment from Matheson based upon a formula which was dependent on the sale price obtained by Matheson from its customers. ATMI recognized revenue from the sale of Licensed Products to Matheson when Matheson sold the Licensed Products to its customers, because that is when the sales price became fixed and determinable. On October 31, 2011, we terminated the agreements with Matheson for manufacturing, marketing, selling and/or distributing of our SDS products (“SDS Direct transaction”). Matheson provided support services to ATMI during a transition period. Subject to such continuing services, ATMI assumed control of all manufacturing, distribution, logistics and sales services, which Matheson had provided globally prior to execution of the Termination Agreement, other than the distribution of the SDS and VAC product lines in Japan, which services continue to be provided by Matheson’s parent company, Taiyo Nippon Sanso Corporation (“TNSC”). We recognize revenue to TNSC when all the revenue recognition criteria are met, which is upon shipment. In those regions where Matheson was involved in distributing products during the transition period in the first half of 2012, revenues were recognized only after sale of the Licensed Products to the end users.
	During the years ended December 31, 2013, 2012 and 2011, ATMI recognized $0.2 million, $6.9 million, and $65.8 million of revenues from Matheson, respectively. The decline in revenue from Matheson in 2012 and 2013 is a result of the SDS Direct transaction. During the years ended December 31, 2013, 2012 and 2011, ATMI recognized revenues from Taiwan Semiconductor Manufacturing Corporation (“TSMC”), of $53.8 million, $48.1 million, and $32.0 million, respectively. During the years ended December 31, 2013, 2012 and 2011, ATMI recognized revenues from Samsung, a leading global integrated circuit manufacturer of $50.7 million, $57.3 million, and $47.6 million, respectively. During the years ended December 31, 2013, 2012 and 2011, ATMI recognized revenues from United Microelectronics Corporation (“UMC”), of $37.7 million, $44.7 million, and $48.7 million, respectively.
	Billings to customers for shipping and handling are included in revenues. Costs incurred for shipping and handling of products are charged to cost of revenues. Credit is extended to customers based on an evaluation of each customer’s financial condition; generally, collateral is not required. Revenues are presented in the consolidated financial statements net of sales allowances and discounts. Accounts receivable are presented in the consolidated financial statements net of the allowance for doubtful accounts. Taxes collected from customers and remitted to governmental authorities are presented on a net basis; and they are excluded from revenues.
Accounts Receivable Allowances	'
	Accounts Receivable Allowances
	The allowance for doubtful accounts is established to represent our best estimate of the net realizable value of the outstanding accounts receivable balances. We estimate our allowance for doubtful accounts based on past due amounts and historical write-off experience, as well as trends and factors surrounding the credit risk of the markets we operate in and the financial viability of specific customers. In an effort to identify adverse trends, we assess the financial health of the markets we operate in and perform periodic credit evaluations of our customers and ongoing reviews of account balances and aging of receivables. Amounts are considered past due when payment has not been received within the time frame of the credit terms extended. Write-offs are charged directly against the allowance for doubtful accounts and occur only after all collection efforts have been exhausted.
Concentrations of Credit Risk	'
	Concentrations of Credit Risk
	Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash and cash equivalents, marketable securities, accounts receivable, and currency forward exchange contracts. We invest our cash and cash equivalents and marketable securities in bank deposits, time deposits, money market securities, equity securities, corporate debt obligations, and government and government-sponsored enterprise bond obligations.
Research and Development	'
	Research and Development
	Costs associated with the development of new products and improvements to existing products are charged to expense as incurred.
Cash and Cash Equivalents and Marketable Securities	'
	Cash and Cash Equivalents and Marketable Securities
	Highly liquid investments with maturities of three months or less, when acquired, are classified as cash and cash equivalents. Investments in publicly traded securities with maturities greater than three months, when acquired, are classified as marketable securities.
	All of the Company’s marketable securities are classified as available-for-sale as of the balance sheet date and are reported at fair value, with unrealized gains and losses included in stockholders’ equity as a component of accumulated other comprehensive income, net of applicable taxes. We regularly review the fair value of marketable security declines below amortized cost to evaluate whether the decline is other-than-temporary. In making this determination, the Company considers all available evidence including, among other things, considering the duration and extent of the decline and the economic factors influencing the market to determine if the fair value will recover to equal or exceed the amortized cost. If we determine that the fair value will not recover, an other-than-temporary impairment is recognized, net of applicable taxes.
	In 2012, we sold our only auction-rate security for $4.2 million resulting in a recognized loss of $0.5 million, which is included in the consolidated statements of operations in the caption “Other expense, net.”
	Marketable securities that are in a temporarily impaired position, where management has the ability and intent to hold until anticipated recovery or maturity, are classified as either current or non-current based on the remaining contractual maturity of the security. Those securities in a temporarily impaired position with contractual maturities greater than one year are classified as non-current.
	As part of our ongoing cash management optimization efforts during 2013, the Company purchased South Korean time deposits which were classified as marketable securities. At December 31, 2013 and 2012, the Company had $13.3 million and $16.9 million, respectively, of time deposits in South Korea.
	As of December 31, 2013, we had $26.5 million of cash and cash equivalents in South Korea, $6.0 million of cash and cash equivalents in Taiwan and $1.9 million in cash and cash equivalents in Japan, which were not available to fund domestic US operations without repatriation. These funds could become subject to additional tax if they are repatriated. It is not practicable to estimate the amount or timing of the additional tax, if any, that eventually might be paid on these foreign funds. We do not anticipate repatriating these funds in the foreseeable future.
Non-marketable Equity and Debt Securities	'
	Non-marketable Equity and Debt Securities
	We selectively invest in non-marketable equity securities of private companies, which range from early-stage companies that are often still defining their strategic direction to more mature companies whose products or technologies may directly support an ATMI product or initiative. Our non-marketable equity investments are recorded using cost basis or the equity method of accounting, depending on the facts and circumstances of each investment. At December 31, 2013, the carrying value of our portfolio of strategic investments in non-marketable equity securities totaled $6.6 million ($6.6 million at December 31, 2012), of which, $4.0 million are accounted for at cost ($4.0 million at December 31, 2012) and $2.6 million are accounted for using the equity method of accounting ($2.6 million at December 31, 2012). In certain instances, we loan funds to early-stage investees at market interest rates to enable them to focus on product and technology development. At December 31, 2013, we had $0.6 million in outstanding loans and accrued interest ($0.2 million at December 31, 2012). Non-marketable equity and debt securities are included in the consolidated balance sheets under the caption “Other non-current assets.” ATMI’s share of the income or losses of all equity-method investees, using the most current financial information available, which is typically one month behind ATMI’s normal closing date, is included in our results of operations from the investment date forward.
	Investments in non-marketable equity securities are inherently risky, and some of these companies are likely to fail. Their success (or lack thereof) is dependent on product development, market acceptance, operational efficiency, attracting and retaining talented professionals, and other key business success factors. In addition, depending on their future prospects, they may not be able to raise additional funds when needed or they may receive lower valuations, with less favorable investment terms than in previous financings, and the investments would likely become impaired.
	We review our investments quarterly for indicators of impairment; however, for non-marketable equity securities, the impairment analysis may require significant judgment to identify events or circumstances that would likely have a significant adverse effect on the fair value of the investment. The indicators that we use to identify those events or circumstances include (a) the investee’s revenue and earnings trends relative to predefined milestones and overall business prospects, (b) the technological feasibility of the investee’s products and technologies, (c) the general market conditions in the investee’s industry or geographic area, including adverse regulatory or economic changes, (d) factors related to the investee’s ability to remain in business, such as the investee’s liquidity, and the rate at which the investee is using its cash, and (e) the investee’s receipt of additional funding at a lower valuation.
	Investments identified as having an indicator of impairment are subject to further analysis to determine if the investment is other-than-temporarily impaired, in which case we write the investment down to its fair value, using the framework required by Accounting Standards Codification (“ASC”) 820 “Fair Value Measurements and Disclosures.” When an investee is not considered viable from a financial or technological point of view, we write down the entire investment balance to zero since we consider the estimated fair market value to be nominal. If an investee obtains additional funding at a valuation lower than our carrying amount or requires a new round of equity funding to stay in operation and the new funding does not appear imminent, we presume that the investment is other-than-temporarily impaired, unless specific facts and circumstances indicate otherwise.
Inventories	'
	Inventories
	Inventories are stated at the lower of cost or market, using the first-in, first-out (“FIFO”) method. Finished goods and work in process inventories include direct material, direct labor and manufacturing overhead costs. Inventory valuation reserves are established in order to report inventories at the lower of cost or market value on our consolidated balance sheets. The determination of inventory valuation reserves requires management to make estimates and judgments on the future salability of inventories. Valuation reserves for excess, obsolete, and slow-moving inventory are estimated by comparing the inventory levels of individual parts to both future sales forecasts or production requirements and historical usage rates in order to identify inventory where the resale value or replacement value is less than inventory cost. Other factors that management considers in determining these reserves include whether individual inventory parts or chemicals meet current specifications and cannot be substituted for or reworked into a part currently being sold or used as a service part, overall market conditions, and other inventory management initiatives.
Property, Plant, and Equipment, net	'
	Property, Plant, and Equipment, net
	Property, plant, and equipment are carried at cost, net of accumulated depreciation. Depreciation is calculated on the straight-line method based on the estimated useful lives of the assets, which range from 3 to 35 years (see Note 6). The estimated useful life represents the projected period of time that the asset will be productively employed by the Company and is determined by management based on many factors, including historical experience with similar assets and technological life cycles. Circumstances and events relating to these assets are monitored to ensure that changes in asset lives or impairments are identified and prospective depreciation expense or impairment expense is adjusted accordingly. The depreciation periods used are: buildings, 5 to 35 years; machinery and equipment, 3 to 15 years; software, 5 to 10 years; cylinders and canisters, 7 to 15 years; furniture and fixtures, 5 years; and leasehold improvements, over the lesser of the lease term or estimated useful life. We use accelerated depreciation methods for tax purposes where appropriate.
Asset-Retirement Obligations	'
	Asset-Retirement Obligations
	An asset-retirement obligation (“ARO”) is recognized in the period in which sufficient information exists to determine the fair value of the liability with a corresponding increase to the carrying amount of the related property, plant, and equipment which is then depreciated over its useful life. The liability is initially measured at fair value and then accretion expense is recorded in each subsequent period.
Income Taxes	'
	Income Taxes
	Current income taxes are determined based on estimated taxes payable or refundable on tax returns for the current year. Deferred income taxes are determined using enacted tax rates for the effect of temporary differences between the book and tax bases of recorded assets and liabilities. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company recognizes the benefit of an income tax position only if it is more likely than not (greater than 50 percent) that the tax position will be sustained upon tax examination, based solely on the technical merits of the tax position. Otherwise, no benefit can be recognized. The tax benefits recognized are measured based on the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement. We adjust these unrecognized tax benefits, including any impact on the related interest and penalties, in light of changing facts and circumstances. A number of years may elapse before a particular matter for which we have established an unrecognized tax benefit is audited and fully resolved. Additionally, the Company accrues interest and related penalties, if applicable, on all tax exposures for which reserves have been established consistent with jurisdictional tax laws, which is included in income tax expense.
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments
	The Company measures and reports financial assets and financial liabilities on a fair value basis, consistent with ASC 820 “Fair Value Measurements and Disclosures,” using the following three categories for classification and disclosure purposes:
	Level 1 — Quoted prices in active markets for identical assets and liabilities. Level 1 assets and liabilities consist of cash, money market fund deposits, time deposits, certain of our marketable equity instruments, and forward foreign currency exchange contracts that are traded in an active market with sufficient volume and frequency of transactions.
	Level 2 — Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets with insufficient volume or infrequent transactions (less active markets); or model-derived valuations in which all significant inputs are observable or can be derived principally from or corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets include certain of our marketable debt instruments with quoted market prices that are traded in less active markets or priced using a quoted market price for similar instruments.
	Level 3 — Unobservable inputs to the valuation methodology that are significant to the measurement of fair value of assets or liabilities.
Foreign Currency Exchange Contracts	'
	Foreign Currency Exchange Contracts
	We use forward foreign currency exchange contracts to hedge specific or anticipated exposures relating to intercompany payments (primarily U.S. export sales to subsidiaries at pre-established U.S. dollar prices), intercompany loans, future cash flows and other specific and identified exposures. The terms of the forward foreign currency exchange contracts are matched to the underlying transaction being hedged. Because such contracts are directly associated with identified transactions, they are an effective hedge against fluctuations in the value of the foreign currency underlying the transaction.
	Changes in the fair value of economic hedges are recognized in earnings as an offset to the change in the fair value of the underlying exposures being hedged. The changes in fair value of derivatives that are designated as cash-flow hedges are deferred in accumulated other comprehensive income (loss) and are recognized in earnings when the underlying hedged transaction occurs. Any ineffectiveness is recognized in earnings immediately. We do not enter into derivative instruments for trading or speculative purposes and all of our derivatives were effective throughout the periods reported.
	Counterparties to forward foreign currency exchange contracts are major banking institutions with credit ratings of investment grade or better and no collateral is required. There are no significant risk concentrations. We believe the risk of incurring losses on derivative contracts related to credit risk is remote.
Goodwill and Other Indefinite-Lived Intangible Assets	'
	Goodwill and Other Indefinite-Lived Intangible Assets
	The assets and liabilities of acquired businesses are recorded under the purchase method of accounting at their estimated fair values at the dates of acquisition. Goodwill represents costs in excess of fair values assigned to the underlying net assets of acquired businesses.
	Goodwill and intangible assets deemed to have indefinite lives are not amortized, but are subject to annual impairment testing.
	For reporting units where the qualitative determination does not indicate that it is more likely than not that the fair value of a reporting unit is more than its carrying value, the prescribed two step test is performed. In order to perform the two-step test we would estimate the fair value of a reporting unit based on the best information available as of October 31, 2013, which primarily incorporates management assumptions about expected future cash flows and contemplates other valuation techniques.
Other Long-Lived Assets	'
	Other Long-Lived Assets
	We evaluate the potential impairment of other long-lived assets when indicators of impairment are present. If the carrying value of assets exceeds the sum of the undiscounted expected future cash flows, the carrying value of the asset is written down to fair value. We amortize acquired patents and other amortizable intangible assets over their estimated useful lives. All amortizable intangible assets are amortized using the straight-line method over the estimated useful lives of the assets, ranging from 5 to 15 years.
Intercompany Loans	'
	Intercompany Loans
	In certain circumstances, the Company maintains intercompany agreements with and among our wholly-owned subsidiaries under which funds are provided to subsidiaries to finance general business activities and are of a long-term investment nature. When settlement of these loans is not planned or anticipated in the foreseeable future, and there is no repayment schedule as part of the agreements, we defer translation gains and losses on these loans in Accumulated other comprehensive income in the period in which they arise.
Translation of Foreign Currencies	'
	Translation of Foreign Currencies
	We conduct business in many different currencies and, accordingly, are subject to the inherent risks associated with foreign exchange rate movements. The financial position and results of operations of many of our foreign subsidiaries are measured using the local currency as the functional currency. Foreign currency denominated assets and liabilities are translated into U.S. dollars at the exchange rates existing at the respective balance sheet dates, and income and expense items are translated at the average exchange rates during the respective periods. The aggregate effects of translating the balance sheets of these subsidiaries are deferred as a separate component of Stockholders’ equity.
Equity-Based Compensation	'
	Equity-based Compensation
	The Company recognizes compensation expense in its consolidated financial statements for all share-based payments granted based on the fair value on the date of grant. For share-based payments granted with a service period vesting restriction, compensation expense is recognized on a straight-line basis or accelerated attribution method over the awards’ respective vesting period. For share-based payments granted with a performance condition, we accrue compensation expense when we determine it is probable that the awards will be earned. For share-based payments granted with a market condition, expense is recognized using the accelerated attribution method over the awards’ respective vesting period.
Collaborative Arrangement	'
	Collaborative Arrangements
	ATMI entered into a collaborative development agreement (“CDA”) with an advanced memory integrated circuit manufacturer for the purpose of developing molecules, including chemical precursors, and material systems for next generation semiconductor products. ATMI will use its High Productivity Development platform to collaboratively work with this customer on specific statements of work designed to develop next-generation materials. The agreement, which was signed in September 2011 and expired in August 2012, required the customer to make quarterly payments to ATMI over the contract term. The arrangement has been determined to be a reimbursement of research and development costs and was recognized as a reduction of expense under the caption, “Research and development” in the Consolidated Statements of Operations. We recognized $0.9 million and $2.9 million related to the CDA as of December 31, 2011 and December 31, 2012.
	Each CDA we execute will be reviewed based on the unique terms and conditions associated with such arrangement to determine, using applicable accounting guidance, the timing of recognition, whether the arrangement is revenue producing or represents a reimbursement of research and development costs, and the appropriate amounts to be recognized. If an arrangement is determined to be revenue producing, we apply applicable accounting standards to ensure proper timing and amounts of revenue recognition. If an arrangement is determined to represent a reimbursement of research and development costs, we apply accounting standards for reimbursements to ensure proper timing, amounts and classification as an offset to research and development expenses.

Discontinued_Operations_Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures	'
	The assets and liabilities of the discontinued operations were as follows (in thousands):
		31-Dec-13			31-Dec-12
	Assets:
	Cash and cash equivalents	$	2,800		$	2,342
	Marketable securities	3,050			—
	Accounts receivable, net	9,562			7,122
	Inventories, net	15,874			10,542
	Other current assets	1,924			1,423
	Property, plant and equipment, net	14,267			13,379
	Goodwill, net	33,735			33,178
	Other intangible assets, net	25,248			25,752
	Other non-current assets	14,158			7,313
	Total assets	$	120,618		$	101,051
	Liabilities:
	Accounts payable	$	2,946		$	2,726
	Accrued liabilities	2,630			1,044
	Accrued salaries and related benefits	2,117			1,682
	Other current liabilities	1,240			2,307
	Other non-current liabilities	4,175			4,618
	Total liabilities	13,108			12,377
	Revenues and losses from discontinued operations were as follows (in thousands):
		Year Ended December 31,
		2013			2012			2011
	Revenues	$	49,358		$	41,584		$	38,264
	Loss from discontinued operations before income taxes	(7,845		)	(6,501		)	(9,906		)
	Loss from discontinued operations, net of tax	$	(8,594	)	$	(5,965	)	$	(9,055	)

Fair_Value_Measurements_and_Ma1

Fair Value Measurements and Marketable Securities (Tables)	12 Months Ended
	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]	'
Assets and Liabilities Measured at Fair Value on Recurring Basis	'
	This table summarizes the Company’s assets (liabilities) measured at fair value on a recurring basis at December 31, 2013 (in thousands):
							Fair Value Measured Using
			Total				Quoted				Significant			Significant
							Prices in				Other			Unobservable
							Active				Observable			Inputs
							Markets for				Inputs			(Level 3)
							(Level 1)				(Level 2)
	Cash & cash equivalents		$	82,646			$	82,646			—			—
	Available-for-sale marketable securities
	Common stock		$	12,754			$	12,754			—			—
	Time deposits		$	13,260			$	13,260			—			—
	Corporate debt obligations		$	7,244			—				$	7,244		—
	Government debt obligations		$	12,943			—				$	12,943		—
	Government sponsored enterprise debt obligations		$	2,225			—				$	2,225		—
	Foreign currency exchange contract asset (1)		$	30			$	30			—			—
	Foreign currency exchange contract liability (1)		$	(409	)		$	(409	)		—			—
	(1)	Refer to Note 5 for additional disclosures on Foreign Currency Exchange Contracts
Schedule of Marketable Securities	'
	Marketable securities include at December 31, (in thousands):
		Cost				2013				Estimated			Cost				2012			Estimated
						Gross				Fair Value							Gross			Fair Value
						Unrealized											Unrealized
						Gain (Loss) (3)											Gain (Loss) (3)
	Securities in unrealized gain position:
	Common stock	$	—			$	—			$	—		$	22,376			$	13,049		$	35,425
	Corporate debt obligations	3,415				6				3,421			4,211				4			4,215
	Government debt obligations (1)	11,393				11				11,404			4,495				14			4,509
	GSE (2) debt obligations	—				—				—			3,501				—			3,501
	U.S. Treasury obligations	—				—				—			4,023				—			4,023
	Subtotal	14,808				17				14,825			38,606				13,067			51,673
	Securities in unrealized loss position:
	Common stock	14,870				(2,116		)		12,754			—				—			—
	Corporate debt obligations	3,824				(1		)		3,823			4,844				(7		)	4,837
	Government debt obligations	1,039				—				1,039			—				—			—
	GSE debt obligations	2,226				(1		)		2,225			8,251				(1		)	8,250
	Subtotal	21,959				(2,118		)		19,841			13,095				(8		)	13,087
	Securities at amortized cost:
	Time deposits	13,260				—				13,260			16,920				—			16,920
	Corporate debt obligations	—				—				—			790				—			790
	Government debt obligations	500				—				500			—				—			—
	Subtotal	13,760				—				13,760			17,710				—			17,710
	Total marketable securities	$	50,527			$	(2,101	)		$	48,426		$	69,411			$	13,059		$	82,470
	(1)	State and municipal government debt obligations.
	(2)	Government sponsored enterprise.
	(3)	Unrealized gains or losses of less than $500 for each category are reflected as a dash.
Investments Classified by Contractual Maturity Date	'
	The amortized cost and estimated fair value of available-for-sale securities, by contractual maturity, as of December 31, 2013 are shown below (in thousands); expected maturities may differ from contractual maturities because the issuers of the securities may exercise the right to prepay obligations without prepayment penalties.
		Cost				Estimated
						Fair Value
	Due in one year or less	$	29,779			$	29,789
	Due between one and three years	5,878				5,883
		35,657				35,672
	Common stock	14,870				12,754
		$	50,527			$	48,426
Schedule of Unrealized Loss on Investments	'
	This table shows the Company’s marketable securities that were in an unrealized loss position at December 31, 2013, and also shows the duration of time the security had been in an unrealized loss position (in thousands):
			Less Than 12 Months								12 Months or Greater							Total
			Fair Value				Unrealized				Fair Value			Unrealized				Fair Value			Unrealized
							Losses							Losses							Losses
	Common stock		$	12,754			$	(2,116	)		$	—		$	—			$	12,754		$	(2,116	)
	Corporate debt obligations		—				—				3,823			(1		)		3,823			(1		)
	Government debt obligations		1,039				—				—			—				1,039			—
	GSE (1) debt obligations		2,225				(1		)		—			—				2,225			(1		)
	Total (2)		$	16,018			$	(2,117	)		$	3,823		$	(1	)		$	19,841		$	(2,118	)
	(1)	Government sponsored enterprise.
	(2)	As of December 31, 2013, we had 6 securities in an unrealized loss position. We have evaluated the near-term prospects of the investments in relation to the severity and duration of the decline in fair value and based on that evaluation we have concluded that we have the ability and intent to hold these investments until the recovery of fair value.

Inventories_Tables

Inventories (Tables)	12 Months Ended
	Dec. 31, 2013
Inventory Disclosure [Abstract]	'
Schedule of Inventories	'
	Inventories include at December 31, (in thousands):
		2013			2012
	Raw materials	$	25,216		$	23,972
	Work in process	1,615			799
	Finished goods	52,592			55,127
		79,423			79,898
	Excess and obsolescence reserve	(2,938		)	(2,886		)
	Inventories, net	$	76,485		$	77,012

Property_Plant_and_Equipment_N1

Property, Plant and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Schedule of Property, Plant and Equipment, Net	'
	Property, plant, and equipment, net, consists of the following (in thousands):
		December 31,
		2013			2012
	Land	$	1,203		$	1,149
	Buildings	30,033			22,109
	Machinery and equipment	121,610			122,043
	Software	26,754			25,122
	Cylinders and canisters	64,091			57,711
	Furniture and fixtures	2,139			1,977
	Leasehold improvements	21,539			18,749
	Construction in progress	21,394			13,448
		288,763			262,308
	Accumulated depreciation and amortization	(168,301		)	(150,588		)
		$	120,462		$	111,720
Schedule of Depreciation Expense, by Income Statement Caption	'
	This table shows amounts recorded in the consolidated statements of operations related to depreciation expense for property, plant, and equipment (in thousands):
		Year Ended December 31,
		2013			2012			2011
	Cost of revenues	$	9,286		$	8,801		$	8,889
	Research and development	8,111			7,609			7,211
	Selling, general, and administrative	3,039			3,446			4,021
	Total depreciation and amortization	$	20,436		$	19,856		$	20,121

Goodwill_and_Other_Intangibles1

Goodwill and Other Intangibles (Tables)	12 Months Ended
	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Intangible Assets and Goodwill	'
	Goodwill and other intangibles balances at December 31, 2013 and 2012 were (in thousands):
			Goodwill		Patents &			Other			Total Other
					Trademarks						Intangibles
	Gross amount as of December 31, 2012		$	13,653	$	33,404		$	9,784		$	43,188
	Accumulated amortization		—		(20,847		)	(1,163		)	(22,010		)
	Balance at December 31, 2012		$	13,653	$	12,557		$	8,621		$	21,178
	Gross amount as of December 31, 2013		$	13,657	$	33,440		$	9,784		$	43,224
	Accumulated amortization		—		(22,677		)	(2,161		)	(24,838		)
	Balance at December 31, 2013		$	13,657	$	10,763		$	7,623		$	18,386
Changes in Goodwill and Other Intangibles	'
	Changes in carrying amounts of goodwill and other intangibles for the years ended December 31, 2013 and 2012, respectively, were (in thousands):
			Goodwill		Patents &			Other			Total Other
					Trademarks						Intangibles
	Balance at December 31, 2011		$	13,606	$	7,812		$	11,605		$	19,417
	Acquisitions		—		6,268			—			6,268
	Amortization expense		—		(1,523		)	(967		)	(2,490		)
	Other, including foreign currency translation		47		—			(2,017		)	(2,017		)
	Balance at December 31, 2012		$	13,653	$	12,557		$	8,621		$	21,178
	Amortization expense		—		(1,830		)	(998		)	(2,828		)
	Other, including foreign currency translation		4		36			—			36
	Balance at December 31, 2013		$	13,657	$	10,763		$	7,623		$	18,386
Schedule of Amortization Expense by Income Statement Location	'
	This table shows amounts recorded in the consolidated statements of operations related to amortization expense for intangibles (in thousands):
			Year Ended December 31,
			2013		2012			2011
	Research and development		399		92			—
	Selling, general, and administrative		2,429		2,398			1,628
	Total amortization		$	2,828	$	2,490		$	1,628
Schedule of Expected Amortization Expense	'
	The approximate amortization expense expected to be recognized related to intangible assets is (in thousands):
	Year	Amount
	2014	$	2,849
	2015	2,849
	2016	2,849
	2017	2,073
	2018	1,417
	Thereafter	6,349
	Total	$	18,386

Leases_Tables

Leases (Tables)	12 Months Ended
	Dec. 31, 2013
Leases [Abstract]	'
Schedule of Future Minimum Lease Payments	'
	Below is a schedule of future minimum lease payments for operating leases as of December 31, 2013 (in thousands):
		Operating
		Leases
	2014	$	2,760
	2015	2,124
	2016	1,570
	2017	468
	2018	209
	Thereafter	268
	Total minimum lease payments	$	7,399
Schedule of Change in Asset Retirement Obligation	'
	Changes in the carrying amounts of the Company’s AROs at December 31, 2013 are shown below (in thousands):
	Balance at December 31, 2012	$	3,574
	Liabilities settled	(8		)
	Liabilities incurred	28
	Accretion expense	54
	Revisions in estimated cash flows	(33		)
	Balance at December 31, 2013	$	3,615

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Pre-tax Income (Loss) from Continuing Operations	'
	Pre-tax income (loss) was taxed in these jurisdictions (in thousands):
			Year Ended December 31,
			2013			2012			2011
	Domestic		$	31,561		$	41,970		$	(54,333	)
	Foreign		19,395			24,656			25,104
	Total pre-tax income (loss)		$	50,956		$	66,626		$	(29,229	)
Components of the Provision (Benefit) for Income Taxes	'
	Significant components of the provision (benefit) for income taxes for the following years ended are (in thousands):
			December 31,
			2013			2012			2011
	Current:
	Federal		$	(3,817	)	$	12,001		$	6,778
	State		271			344			277
	Foreign		5,082			1,638			2,632
	Total current		1,536			13,983			9,687
	Deferred:
	Federal		10,951			3,210			(26,547		)
	State		570			436			(2,070		)
	Foreign		(860		)	702			665
	Total deferred		10,661			4,348			(27,952		)
			$	12,197		$	18,331		$	(18,265	)
Components of the Company's Deferred Tax Assets and Liabilities	'
	Significant components of the Company’s deferred tax assets and liabilities are (in thousands):
			December 31,
			2013			2012
	Deferred tax assets:
	Accrued liabilities		$	3,624		$	4,581
	Inventory reserves		2,166			2,227
	Net operating loss and tax credit carryforwards		3,369			2,747
	Equity-based compensation		7,929			8,613
	Reacquired rights on contract termination		14,112			27,013
	Other, net		747			96
			31,947			45,277
	Valuation allowance		(574		)	(359		)
			31,373			44,918
	Deferred tax liabilities:
	Depreciation and amortization		(16,146		)	(20,525		)
	Unrealized gain on marketable securities		—			(4,408		)
	Other, net		(3,309		)	(3,184		)
			(19,455		)	(28,117		)
	Net deferred tax assets		$	11,918		$	16,801
Deferred Tax Assets Related to Net Operating Loss and Tax Credit Carryforwards	'
	As of December 31, 2013, the Company had the following deferred tax assets related to net operating loss (“NOLs”) and tax credit carryforwards (in thousands):
						Expiration
	Federal
	-Capital Loss		$	472		2015-2017
			$	472
	State
	-NOLs		478			2014-2033
	-Credits		54			2024-2028
	-Credits		216			None
			$	748
	Foreign
	-NOLs		998			None
	-NOLs		161			2017-2018
	-Credits		990			2017-2018
			$	2,149
	Total		$	3,369
Schedule of Effective Income Tax Rate Reconciliation	'
	The reconciliation of income tax expense (benefit) from continuing operations computed at the U.S. federal statutory tax rate to the Company’s tax expense (benefit) is (in thousands):
			For the Year Ended December 31,
			2013			2012			2011
	U.S. statutory rate		$	17,834		$	23,319		$	(10,231	)
	State income taxes		312			507			(1,165		)
	Foreign income taxes		(3,193		)	(6,675		)	(6,144		)
	Change in valuation allowance of deferred tax assets		235			388			(347		)
	Other, net		(2,991		)	792			(378		)
			$	12,197		$	18,331		$	(18,265	)
Schedule of Unrecognized Tax Benefits Roll Forward	'
	The reconciliation of the unrecognized tax benefits (exclusive of interest) at the beginning of 2012 through the end of 2013 is (in thousands):
	Ending Balance - December 31, 2011	$	3,656
	Increases from prior period positions	27,015
	Decreases from prior period positions	(159		)
	Increases from current period positions	467
	Decreases related to settlements with taxing authorities	(224		)
	Decreases from lapse of statute of limitations	(127		)
	Ending Balance - December 31, 2012	$	30,628
	Increases from prior period positions	359
	Decreases from prior period positions	(74		)
	Increases from current period positions	454
	Decreases related to settlements with taxing authorities	(27,868		)
	Decreases from lapse of statute of limitations	(1,163		)
	Balance at December 31, 2013	$	2,336

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	'
	This table shows the effect of pre-tax compensation cost arising from equity-based payment arrangements recognized in income (loss) from continuing operations (in thousands):
			December 31,
			2013			2012				2011
	Cost of revenues		$	161		$	232			$	406
	Research and development		476			612				794
	Selling, general, and administrative		6,144			6,954				5,878
	Total equity-based compensation expense		$	6,781		$	7,798			$	7,078
Summary of Equity-Based Compensation Plans	'
	This table shows the number of shares approved by shareholders for each plan and the number of shares that remain available for equity awards at December 31, 2013 (in thousands):
	Stock Plan		# of Shares		# of Shares
			Approved		Available
	2010 Stock Plan (1)		3,000		2,189
	Employee Stock Purchase Plan (2)		1,000		227
	Totals		4,000		2,416
	(1)	Exercise prices for ISOs and non-qualified stock options granted under this plan may not be less than 100 percent of the fair market value for the Company’s common stock on the date of grant.
	(2)	Employees may purchase shares at 95 percent of the closing price on the day previous to the last day of each six-month offering period. This plan is not considered to be compensatory.
Schedule of Stock Option Valuation Assumptions	'
	These weighted-average assumptions were used for grants in the periods indicated:
			2013		2012			2011
	Stock option grants:
	Risk free interest rate		1.59	%	1.52	%		3.15	%
	Expected term, in years		7.92		7.87			7.85
	Expected volatility		41	%	42.84	%		43.3	%
	Dividend yield		—	%	—	%		—	%
Schedule of Share-Based Compensation, Stock Options, Activity	'
	This table shows the option activity under our current and prior plans as of December 31, 2013 and changes during the year then ended (options are expressed in thousands; averages are calculated on a weighted basis; life in years; intrinsic value expressed in thousands):
			Number		Average				Average		Aggregate
			of		Exercise				Remaining		Intrinsic
			Options		Price				Life		Value
	Outstanding at December 31, 2012		1,528		$	21.98
	Granted		180		$	21.92
	Exercised		(391	)	$	19.87
	Forfeited		(47	)	$	20.65
	Expired		(109	)	27.48
	Outstanding at December 31, 2013		1,161		$	22.22			5.4		$	9,409
	Exercisable at December 31, 2013		822		$	22.57			4.2		$	6,401
Schedule of Nonvested Restricted Stock Units Activity	'
	This table shows restricted stock activity as of December 31, 2013 and changes during the year then ended (shares are expressed in thousands; averages are calculated on a weighted basis):
			Number		Average
			of		Grant Date
			Shares		Fair Value
	Nonvested at December 31, 2012		1,073		$	18.75
	Granted		340		$	22.47
	Vested		(255	)	$	18
	Forfeited		(152	)	$	19.17
	Nonvested at December 31, 2013		1,006		$	20.14
Computation of Earnings Per Share	'
	This table shows the computation of basic and diluted earnings per share (in thousands, except per share data):
			2013			2012				2011
	Numerator:
	Income (loss) from continuing operations		$	38,759		$	48,295			$	(10,964	)
	Denominator:
	Denominator for basic earnings per share
	- weighted average shares		31,911			31,931				31,703
	Dilutive effect of employee stock options		162			168				—
	Dilutive effect of restricted stock		678			565				—
	Denominator for diluted earnings per common share – weighted average shares		32,751			32,664				31,703
	Earnings (loss) per common share from continuing operations - basic		1.21			1.51				(0.35		)
	Earnings (loss) per common share from continuing operations - diluted		1.18			1.48				(0.35		)
Antidilutive Securities Excluded from Computation	'
	This table shows the potential common shares excluded from the calculation of weighted-average shares outstanding because their effect was considered to be antidilutive (in thousands):
			2013		2012			2011
	Antidilutive shares		581		1,069			2,144

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Components of Accumulated Other Comprehensive Income	'
	The components of accumulated other comprehensive income are (in thousands):
			Currency				Unrealized			Unrealized			Total
			Translation				Gain (Loss) on			Gain (Loss) on
			Adjustments				Available-for-			Derivative
							Sale Securities			Instruments
	Balance at December 31, 2010		$	4,167			$	(139	)	—			$	4,028
	Reclassification adjustment related to marketable securities in net unrealized gain at prior period end, net of $0 tax provision (1)		—				(1		)	—			(1		)
	Change in fair value of available-for-sale securities, net of deferred income tax of $4,351		—				7,119			—			7,119
	Cumulative translation adjustment		(3,097		)		—			—			(3,097		)
	Balance at December 31, 2011		$	1,070			$	6,979		$	—		$	8,049
	Reclassification adjustment related to marketable securities in net unrealized loss at prior period end, net of $495 tax provision (1)		—				854			—			854
	Change in fair value of available-for-sale securities, net of deferred income tax of $326		—				397			—			397
	Change in fair value of derivative financial instruments, net of deferred income tax of $636		—				—			1,098			1,098
	Cumulative translation adjustment		5,230				—			—			5,230
	Balance at December 31, 2012		$	6,300			$	8,230		$	1,098		$	15,628
	Reclassification adjustment related to marketable securities in net unrealized gain at prior period end, net of $1,625 tax provision (1)		—				(3,489		)				(3,489		)
	Change in fair value of available-for-sale securities, net of deferred income tax of $3,215		—				(5,592		)				(5,592		)
	Reclassification adjustment related to cash flow hedges in net unrealized gain position at prior period end, net of $455 tax provision (1)									(799		)	(799		)
	Change in fair value of derivative financial instruments, net of deferred income tax of $615		—							1,080			1,080
	Cumulative translation adjustment		1,703										1,703
	Balance at December 31, 2013		$	8,003			$	(851	)	$	1,379		$	8,531
	(1)	Determined based on the average cost method
Reclassifications out of Accumulated Other Comprehensive Income	'
	The reclassifications out of accumulated other comprehensive income are (in thousands):
	Details about Accumulated Other Comprehensive	Amount Reclassified from				Effect on the Consolidated
	Income Components	Accumulated Other				Statements of Comprehensive Income
		Comprehensive Income
	Realized gains and losses on cash flow hedges
	Foreign exchange contracts	$	1,442			Revenues
		(188		)		Cost of revenues
		1,254				Total before tax
		(455		)		Estimated tax expense
		$	799			Net of estimated tax
	Realized gains and losses on available-for-sale securities
	Available-for-sale securities	$	5,114			Other income (expense), net
		5,114				Total before tax
		(1,625		)		Estimated tax expense
		$	3,489			Net of estimated tax
	Total reclassifications for the period	$	4,288			Net of estimated tax

Segments_Tables

Segments (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Reporting, Measurement Disclosures [Abstract]	'
Revenue by Product Line	'
	Revenues from external customers, by product type, were as follows (in thousands):
		Revenue
		December 31,
		2013		2012		2011
	Implant	$	112,918	$	100,289	$	77,450
	Display	26,206		31,902		34,663
	Photo IC	24,020		24,271		27,033
	Copper Materials	174,890		191,051		193,420
	Other Microelectronics	20,394		18,002		18,851
	All Other	2,531		334		406
	Total Continuing Operations	$	360,959	$	365,849	$	351,823

Geographic_Data_Tables

Geographic Data (Tables)	12 Months Ended
	Dec. 31, 2013
Segments, Geographical Areas [Abstract]	'
Schedule Of Revenues from External Customers And Long-Lived Assets	'
	The Company’s geographic data for the years ended December 31, 2013, 2012 and 2011 are (in thousands):
		U.S.		Taiwan		Japan		South Korea		China		Other		Europe and		Total
												Pacific Rim		Other
	31-Dec-13
	Revenues	$	59,766	$	99,154	$	40,976	$	74,242	$	38,921	$	25,419	$	22,481	$	360,959
	Long-lived assets	127,377		4,796		783		33,334		2,456		266		213		169,225
	31-Dec-12
	Revenues	$	63,248	$	98,643	$	48,437	$	85,402	$	24,341	$	22,125	$	23,653	$	365,849
	Long-lived assets	136,578		6,409		2,599		18,076		343		152		241		164,398
	31-Dec-11
	Revenues	$	65,990	$	97,289	$	43,292	$	78,777	$	23,651	$	24,215	$	18,609	$	351,823
	Long-lived assets	112,579		6,037		7,872		6,440		355		137		277		133,697

Recovered_Sheet1

Quarterly Results Of Operations (Tables)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Quarterly Results Of Operations	'
	Summarized quarterly results of operations data is as follows (in thousands, except per share amounts):
		Quarter
		First				Second				Third				Fourth
	2013
	Revenues	$	88,126			$	90,064			$	87,925			$	94,844
	Gross profit	42,598				44,169				41,795				47,384
	Operating income	12,201			(a)	15,025				12,956			(c)	7,214			(d)
	Income from continuing operations	$	10,210			$	11,669		(b)	$	10,492			$	6,388		(e)
	Loss from discontinued operations, net of taxes	(1,784		)		(2,222		)		(2,044		)		(2,544		)
	Net income	$	8,426			$	9,447			$	8,448			$	3,844
	Basic income per common share:
	Earnings per common share from continuing operations	$	0.32			$	0.37			$	0.33			$	0.2
	Diluted income per common share:
	Earnings per common share from continuing operations	$	0.31			$	0.36			$	0.32			$	0.19
	2012
	Revenues	83,465				94,745				98,459			(h)	89,180
	Gross profit	41,250			(f)	49,235				51,503				44,603
	Operating income	8,962				18,699			(g)	23,175				14,948
	Income from continuing operations	$	6,357			$	13,172			$	16,857			$	11,909
	Income (loss) from discontinued operations, net of taxes	(2,495		)		(1,749		)		(2,432		)		711
	Net income	$	3,862			$	11,423			$	14,425			$	12,620
	Basic income per common share:
	Earnings per common share from continuing operations	$	0.2			$	0.41			$	0.53			$	0.37
	Diluted income per common share:
	Earnings per common share from continuing operations	$	0.19			$	0.4			$	0.52			$	0.36
	Note: The operating results presented in the table have been restated for prior periods to exclude discontinued operations.
	(a)	Includes $1.8 million of severance costs in order to better streamline business activities with our customers and partners.
	(b)	Includes a $1.1 million gain on sale of marketable securities.
	(c)	Includes $0.8 million of severance costs associated with an action to reduce operational infrastructure with the objective of streamlining operations.
	(d)	Includes a $1.2 million gain on sale of marketable securities.
	(e)	Includes $11.5 million impairment charge related to our HPD assets.
	(f)	Includes $1.5 million capitalization of certain logistics and freight costs into inventory.
	(g)	Includes a $0.5 million recognized loss on the sale of an auction rate security.
	(h)	Includes $2.6 million from IP settlement, which represents the settlement of royalties for periods prior to the third quarter of 2013.

Organization_and_Summary_of_Si2

Organization and Summary of Significant Accounting Policies (Revenue Recognition And Accounts Receivable, Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue, Major Customer [Line Items]	'	'	'
Manufacturing rights, percentage	'	'	25.00%
Matheson [Member]	'	'	'
Revenue, Major Customer [Line Items]	'	'	'
Manufacturing rights, percentage	'	'	75.00%
Revenue from major customer	$0.20	$6.90	$65.80
Semiconductor Manufacturing Corporation [Member]	'	'	'
Revenue, Major Customer [Line Items]	'	'	'
Revenue from major customer	53.8	48.1	32
Samsung [Member]	'	'	'
Revenue, Major Customer [Line Items]	'	'	'
Revenue from major customer	50.7	57.3	47.6
United Microelectronics Corporation [Member]	'	'	'
Revenue, Major Customer [Line Items]	'	'	'
Revenue from major customer	$37.70	$44.70	$48.70

Organization_and_Summary_of_Si3

Organization and Summary of Significant Accounting Policies (Concentrations Of Credit Risk, Narrative) (Details) (Accounts Receivable [Member], Credit Concentration Risk [Member])	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
	customer	customer
Accounts Receivable [Member] | Credit Concentration Risk [Member]	'	'
Concentration Risk [Line Items]	'	'
Concentration Risk, Count	2	1
Concentration Risk, Percentage	32.00%	20.00%

Organization_and_Summary_of_Si4

Organization and Summary of Significant Accounting Policies (Cash and Cash Equivalents and Marketable Securities, Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013
Cash and Cash Equivalents [Line Items]	'	'
Purchases, Sales, Issuances, Settlements	$4,200,000	'
Loss on sale of auction-rate security	500,000	'
Cash and cash equivalents	83,709,000	82,646,000
South Korea	'	'
Cash and Cash Equivalents [Line Items]	'	'
Time deposits	16,900,000	13,300,000
Cash and cash equivalents	'	26,500,000
Taiwan	'	'
Cash and Cash Equivalents [Line Items]	'	'
Cash and cash equivalents	'	6,000,000
Japan	'	'
Cash and Cash Equivalents [Line Items]	'	'
Cash and cash equivalents	'	$1,900,000

Organization_and_Summary_of_Si5

Organization and Summary of Significant Accounting Policies (Non-Marketable Securities, Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]	'	'	'
Non-marketable equity securities, carrying value	$6,600,000	$6,600,000	'
Cost basis investments	4,000,000	4,000,000	'
Non-marketable equity securities, accounted for using equity method accounting	2,600,000	2,600,000	'
Outstanding loans and accrued interest due from affiliates	600,000	200,000	'
Impairment charge, non-marketable equity securities	0	0	0
Variable interest entity, carrying amount	3,900,000	'	'
Variable interest entity, maximum loss exposure	$3,900,000	'	'

Organization_and_Summary_of_Si6

Organization and Summary of Significant Accounting Policies (Inventories, Narrative) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounting Policies [Abstract]	'	'
Inventory valuation reserves	$2,938	$2,886

Organization_and_Summary_of_Si7

Organization and Summary of Significant Accounting Policies (Property, Plant, And Equipment, Net, Narrative) (Details)	12 Months Ended
	Dec. 31, 2013
Furniture and Fixtures [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life of property, plant, and equipment	'5 years
Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life of property, plant, and equipment	'3 years
Minimum [Member] | Building [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life of property, plant, and equipment	'5 years
Minimum [Member] | Machinery and Equipment [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life of property, plant, and equipment	'3 years
Minimum [Member] | Software [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life of property, plant, and equipment	'5 years
Minimum [Member] | Cylinders And Canisters [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life of property, plant, and equipment	'7 years
Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life of property, plant, and equipment	'35 years
Maximum [Member] | Building [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life of property, plant, and equipment	'35 years
Maximum [Member] | Machinery and Equipment [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life of property, plant, and equipment	'15 years
Maximum [Member] | Software [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life of property, plant, and equipment	'10 years
Maximum [Member] | Cylinders And Canisters [Member]	'
Property, Plant and Equipment [Line Items]	'
Estimated useful life of property, plant, and equipment	'15 years

Organization_and_Summary_of_Si8

Organization and Summary of Significant Accounting Policies (Other Long-Lived Assets, Narrative) (Details)	12 Months Ended
	Dec. 31, 2013
Minimum [Member]	'
Finite-Lived Intangible Assets [Line Items]	'
Finite-Lived Intangible Asset, Useful Life	'5 years
Maximum [Member]	'
Finite-Lived Intangible Assets [Line Items]	'
Finite-Lived Intangible Asset, Useful Life	'15 years

Organization_and_Summary_of_Si9

Organization and Summary of Significant Accounting Policies Organization and Summary of Significant Accounting Policies (Collaborative Arrangements, Narrative) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]	'	'	'
Research and development	$55,666	$47,286	$46,767
Collaborative Arrangement, Product [Member]	'	'	'
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]	'	'	'
Research and development	'	$2,900	$900

Recovered_Sheet2

Organization and Summary of Significant Accounting Policies Organization and Summary of Significant Accounting Policies (Severance Expense, Narrative) (Details) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013	Dec. 31, 2013
Accounting Policies [Abstract]	'	'	'
Severance expense	$0.80	$1.80	$2.60

Discontinued_Operations_Narrat

Discontinued Operations (Narrative) (Details) (Discontinued Operations [Member], USD $)	0 Months Ended
In Millions, unless otherwise specified	Dec. 22, 2013
Discontinued Operations [Member]	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'
Proceeds from Divestiture of Businesses	$185

Discontinued_Operations_Revenu

Discontinued Operations (Revenue and Losses) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Discontinued Operations and Disposal Groups [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Revenues	'	'	'	'	'	'	'	'	$49,358	$41,584	$38,264
Loss from discontinued operations before income taxes	'	'	'	'	'	'	'	'	-7,845	-6,501	-9,906
Loss from discontinued operations, net of taxes	($2,544)	($2,044)	($2,222)	($1,784)	$711	($2,432)	($1,749)	($2,495)	($8,594)	($5,965)	($9,055)

Discontinued_Operations_Balanc

Discontinued Operations (Balance Sheet) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets of Disposal Group, Including Discontinued Operation, Current [Abstract]	'	'
Cash and cash equivalents	$2,800	$2,342
Marketable securities	3,050	0
Accounts receivable, net	9,562	7,122
Inventories, net	15,874	10,542
Other current assets	1,924	1,423
Assets of Disposal Group, Including Discontinued Operation, Noncurrent [Abstract]	'	'
Property, plant and equipment, net	14,267	13,379
Goodwill, net	33,735	33,178
Other intangible assets, net	25,248	25,752
Other non-current assets	14,158	7,313
Total assets	120,618	101,051
Liabilities of Disposal Group, Including Discontinued Operation, Current [Abstract]	'	'
Accounts payable	2,946	2,726
Accrued liabilities	2,630	1,044
Accrued salaries and related benefits	2,117	1,682
Other current liabilities	1,240	2,307
Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent [Abstract]	'	'
Other non-current liabilities	4,175	4,618
Total liabilities	$13,108	$12,377

Fair_Value_Measurements_and_Ma2

Fair Value Measurements and Marketable Securities Fair Value Measurements and Marketable Securities (Narrative) (Details) (USD $)	12 Months Ended				3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013
			Fair Value, Measurements, Nonrecurring [Member]	Fair Value, Measurements, Nonrecurring [Member]	Research and Development Expense [Member]
				Fair Value, Inputs, Level 3 [Member]	Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'	'	'	'
Impairment of Long-Lived Assets to be Disposed of	'	'	'	'	$10,800,000
Impairment of Prepaid Fees to be Disposed of	'	'	'	'	700,000
Research and development equipment	'	'	'	2,600,000	'
Available-for-sale Securities, Gross Unrealized Gain (Loss) less than $500	-2,101,000	13,059,000	'	'	'
Gain on sale of available for sale securities	'	'	2,000,000	'	'
Common Stock, Value, Outstanding	'	'	12,800,000	'	'
Common Stock, Value, Outstanding, Temporary Unrealized Loss, Amount	'	'	$2,100,000	'	'

Fair_Value_Measurements_and_Ma3

Fair Value Measurements and Marketable Securities (Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Cash & cash equivalents	$82,646		'
Available-for-sale marketable securities	48,426		82,470
Foreign currency exchange contract asset (1)	30	[1]	'
Foreign currency exchange contract liability (1)	-409	[1]	'
Fair Value, Inputs, Level 1 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Cash & cash equivalents	82,646		'
Foreign currency exchange contract asset (1)	30	[1]	'
Foreign currency exchange contract liability (1)	-409	[1]	'
Fair Value, Inputs, Level 2 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Cash & cash equivalents	0		'
Foreign currency exchange contract asset (1)	0	[1]	'
Foreign currency exchange contract liability (1)	0	[1]	'
Fair Value, Inputs, Level 3 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Cash & cash equivalents	0		'
Foreign currency exchange contract asset (1)	0	[1]	'
Foreign currency exchange contract liability (1)	0	[1]	'
Common Stock [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	12,754		'
Common Stock [Member] | Fair Value, Inputs, Level 1 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	12,754		'
Common Stock [Member] | Fair Value, Inputs, Level 2 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	0		'
Common Stock [Member] | Fair Value, Inputs, Level 3 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	0		'
Bank Time Deposits [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	13,260		'
Bank Time Deposits [Member] | Fair Value, Inputs, Level 1 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	13,260		'
Bank Time Deposits [Member] | Fair Value, Inputs, Level 2 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	0		'
Bank Time Deposits [Member] | Fair Value, Inputs, Level 3 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	0		'
Corporate Debt Securities [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	7,244		'
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	0		'
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	7,244		'
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	0		'
US States and Political Subdivisions Debt Securities [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	12,943		'
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	0		'
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	12,943		'
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	0		'
US Government-sponsored Enterprises Debt Securities [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	2,225		'
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	0		'
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	2,225		'
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Available-for-sale marketable securities	$0		'
[1]	Refer to Note 5 for additional disclosures on Foreign Currency Exchange Contracts

Fair_Value_Measurements_and_Ma4

Fair Value Measurements and Marketable Securities (Schedule Of Marketable Securities) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	$50,527		$69,411
Available-for-sale Securities, Gross Unrealized Gain (Loss)	-2,101		13,059
Available-for-sale securities, Estimated Fair Value	48,426		82,470
Common Stock [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	14,870		'
Available-for-sale securities, Estimated Fair Value	12,754		'
Securities In Unrealized Gain Position [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	14,808		38,606
Available-for-sale Securities, Gross Unrealized Gain (Loss)	17		13,067
Available-for-sale securities, Estimated Fair Value	14,825		51,673
Securities In Unrealized Gain Position [Member] | Common Stock [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	0		22,376
Available-for-sale Securities, Gross Unrealized Gain (Loss)	0	[1]	13,049
Available-for-sale securities, Estimated Fair Value	0		35,425
Securities In Unrealized Gain Position [Member] | Corporate Debt Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	3,415		4,211
Available-for-sale Securities, Gross Unrealized Gain (Loss)	6	[1]	4
Available-for-sale securities, Estimated Fair Value	3,421		4,215
Securities In Unrealized Gain Position [Member] | US States and Political Subdivisions Debt Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	11,393	[2]	4,495	[2]
Available-for-sale Securities, Gross Unrealized Gain (Loss)	11	[2]	14
Available-for-sale securities, Estimated Fair Value	11,404	[2]	4,509	[2]
Securities In Unrealized Gain Position [Member] | US Government-sponsored Enterprises Debt Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	0	[3]	3,501	[3]
Available-for-sale Securities, Gross Unrealized Gain (Loss)	0	[1],[3]	0	[1],[3]
Available-for-sale securities, Estimated Fair Value	0	[3]	3,501	[3]
Securities In Unrealized Gain Position [Member] | U.S. Treasury Obligations [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	0		4,023
Available-for-sale Securities, Gross Unrealized Gain (Loss)	0	[1]	0	[1]
Available-for-sale securities, Estimated Fair Value	0		4,023
Securities In Unrealized Loss Position [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	21,959		13,095
Available-for-sale Securities, Gross Unrealized Gain (Loss)	-2,118		-8
Available-for-sale securities, Estimated Fair Value	19,841		13,087
Securities In Unrealized Loss Position [Member] | Common Stock [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	14,870		0
Available-for-sale Securities, Gross Unrealized Gain (Loss)	-2,116		0	[1]
Available-for-sale securities, Estimated Fair Value	12,754		0
Securities In Unrealized Loss Position [Member] | Corporate Debt Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	3,824		4,844
Available-for-sale Securities, Gross Unrealized Gain (Loss)	-1		-7
Available-for-sale securities, Estimated Fair Value	3,823		4,837
Securities In Unrealized Loss Position [Member] | US States and Political Subdivisions Debt Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	1,039		0
Available-for-sale Securities, Gross Unrealized Gain (Loss)	0	[1]	0	[1]
Available-for-sale securities, Estimated Fair Value	1,039		0
Securities In Unrealized Loss Position [Member] | US Government-sponsored Enterprises Debt Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	2,226		8,251
Available-for-sale Securities, Gross Unrealized Gain (Loss)	-1		-1
Available-for-sale securities, Estimated Fair Value	2,225		8,250
Securities At Amortized Cost [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	13,760		17,710
Available-for-sale Securities, Gross Unrealized Gain (Loss)	0	[1]	0	[1]
Available-for-sale securities, Estimated Fair Value	13,760		17,710
Securities At Amortized Cost [Member] | Corporate Debt Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	0		790
Available-for-sale Securities, Gross Unrealized Gain (Loss)	0	[1]	0	[1]
Available-for-sale securities, Estimated Fair Value	0		790
Securities At Amortized Cost [Member] | Bank Time Deposits [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	13,260		16,920
Available-for-sale Securities, Gross Unrealized Gain (Loss)	0	[1]	0	[1]
Available-for-sale securities, Estimated Fair Value	13,260		16,920
Securities At Amortized Cost [Member] | US States and Political Subdivisions Debt Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Cost	500		0
Available-for-sale Securities, Gross Unrealized Gain (Loss)	0	[1]	0	[1]
Available-for-sale securities, Estimated Fair Value	$500		$0
[1]	Unrealized gains or losses of less than $500 for each category are reflected as a dash
[2]	State and municipal government debt obligations.
[3]	Government sponsored enterprise.

Fair_Value_Measurements_and_Ma5

Fair Value Measurements and Marketable Securities (Investments Classified by Contractual Maturity Date) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Due in one year or less, Cost	$29,779	'
Due between one and three years, Cost	5,878	'
Total maturities, Cost	35,657	'
Available-for-sale securities, Cost	50,527	69,411
Due in one year or less, Estimated Fair Value	29,789	'
Due between one and three years, Estimated Fair Value	5,883	'
Total maturities, Estimated Fair Value	35,672	'
Available-for-sale securities, Estimated Fair Value	48,426	82,470
Common Stock [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale securities, Cost	14,870	'
Available-for-sale securities, Estimated Fair Value	$12,754	'

Fair_Value_Measurements_and_Ma6

Fair Value Measurements and Marketable Securities (Schedule Of Unrealized Loss On Investments) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
	security
Schedule of Available-for-sale Securities [Line Items]	'
Less Than 12 Months, Fair Value	$16,018	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	-2,117	[1]
12 Months or Greater, Fair Value	3,823	[1]
12 Months or Greater, Unrealized Losses	-1	[1]
Fair Value	19,841	[1]
Unrealized Losses	-2,118	[1]
Number of marketable securities in an unrealized loss position	6
Common Stock [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Less Than 12 Months, Fair Value	12,754
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	-2,116
12 Months or Greater, Fair Value	0
12 Months or Greater, Unrealized Losses	0
Fair Value	12,754
Unrealized Losses	-2,116
Corporate Debt Securities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Less Than 12 Months, Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	0
12 Months or Greater, Fair Value	3,823
12 Months or Greater, Unrealized Losses	-1
Fair Value	3,823
Unrealized Losses	-1
US States and Political Subdivisions Debt Securities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Less Than 12 Months, Fair Value	1,039
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	0
12 Months or Greater, Fair Value	0
12 Months or Greater, Unrealized Losses	0
Fair Value	1,039
Unrealized Losses	0
US Government-sponsored Enterprises Debt Securities [Member]	'
Schedule of Available-for-sale Securities [Line Items]	'
Less Than 12 Months, Fair Value	2,225	[2]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	-1	[2]
12 Months or Greater, Fair Value	0	[2]
12 Months or Greater, Unrealized Losses	0	[2]
Fair Value	2,225	[2]
Unrealized Losses	($1)	[2]
[1]	As of December 31, 2013, we had 6 securities in an unrealized loss position. We have evaluated the near-term prospects of the investments in relation to the severity and duration of the decline in fair value and based on that evaluation we have concluded that we have the ability and intent to hold these investments until the recovery of fair value.
[2]	Government sponsored enterprise.

Inventories_Narrative_Details

Inventories (Narrative) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Purchase Commitment, Excluding Long-term Commitment [Line Items]	'	'
Commitments for inventory purchases	$57	'
Finished goods inventory residing at non-ATMI consignment locations	5.5	5.1
Purchase Commitment [Member]	'	'
Purchase Commitment, Excluding Long-term Commitment [Line Items]	'	'
Commitments for inventory purchases	$73	'

Inventories_Schedule_Of_Invent

Inventories (Schedule Of Inventories) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Raw materials	$25,216	$23,972
Work in process	1,615	799
Finished goods	52,592	55,127
Inventories, gross	79,423	79,898
Excess and obsolescence reserve	-2,938	-2,886
Inventories, net	$76,485	$77,012

Foreign_Currency_Exchange_Cont1

Foreign Currency Exchange Contracts (Details) (Foreign Exchange Contract [Member], Net Investment Hedging [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]	'	'	'
Accumulated unrecognized losses, expected to be reclassified into earnings during the next twelve months, cash flow hedges	$1.40	'	'
Gains (losses) from changes in the fair value of the foreign currency exchange contract economic hedges	-0.5	1.7	-2
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	0.3	1.1	'
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	0.8	'	'
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'	'
Derivative [Line Items]	'	'	'
Reclassification of deferred losses in other comprehensive income into earnings	2.8	-0.2	'
Not Designated as Hedging Instrument [Member]	'	'	'
Derivative [Line Items]	'	'	'
Notional amount of foreign currency exchange contract	46	22.6	'
Not Designated as Hedging Instrument [Member] | Euro Member Countries, Euro	'	'	'
Derivative [Line Items]	'	'	'
Notional amount of foreign currency exchange contract	32.5	9	'
Not Designated as Hedging Instrument [Member] | Taiwan, New Dollars	'	'	'
Derivative [Line Items]	'	'	'
Notional amount of foreign currency exchange contract	1.2	4.2	'
Not Designated as Hedging Instrument [Member] | Korea (South), Won	'	'	'
Derivative [Line Items]	'	'	'
Notional amount of foreign currency exchange contract	6.6	5.8	'
Not Designated as Hedging Instrument [Member] | China, Yuan Renminbi	'	'	'
Derivative [Line Items]	'	'	'
Notional amount of foreign currency exchange contract	1.7	'	'
Not Designated as Hedging Instrument [Member] | Japan, Yen	'	'	'
Derivative [Line Items]	'	'	'
Notional amount of foreign currency exchange contract	4	3.6	'
Designated as Hedging Instrument [Member] | Japan, Yen	'	'	'
Derivative [Line Items]	'	'	'
Notional amount of foreign currency exchange contract	$11.90	$19.10	'

Property_Plant_and_Equipment_N2

Property, Plant and Equipment, Net (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Abstract]	'	'	'
Depreciation and amortization expense	$20.40	$19.90	$20.10
Property, plant, and equipment, fully depreciated, write-offs	0.5	11.4	'
Impairment losses from property, plant, and equipment	11.7	0.9	0.6
Commitments for capital expenditures	$1.40	'	'

Property_Plant_and_Equipment_N3

Property, Plant and Equipment, Net (Schedule Of Property, Plant and Equipment, Net) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Property, Plant and Equipment, Gross	$288,763	$262,308
Accumulated depreciation and amortization	-168,301	-150,588
Property, plant, and equipment, net	120,462	111,720
Land [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, Plant and Equipment, Gross	1,203	1,149
Building [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, Plant and Equipment, Gross	30,033	22,109
Machinery and Equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, Plant and Equipment, Gross	121,610	122,043
Software [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, Plant and Equipment, Gross	26,754	25,122
Cylinders And Canisters [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, Plant and Equipment, Gross	64,091	57,711
Furniture and Fixtures [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, Plant and Equipment, Gross	2,139	1,977
Leasehold Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, Plant and Equipment, Gross	21,539	18,749
Construction in Progress [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property, Plant and Equipment, Gross	$21,394	$13,448

Property_Plant_and_Equipment_N4

Property, Plant and Equipment, Net (Schedule Of Depreciation Expense, By Income Statement Caption) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]	'	'	'
Depreciation	$20,436	$19,856	$20,121
Cost of Sales [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Depreciation	9,286	8,801	8,889
Research and Development Expense [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Depreciation	8,111	7,609	7,211
Selling, General and Administrative Expenses [Member]	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Depreciation	$3,039	$3,446	$4,021

Goodwill_and_Other_Intangibles2

Goodwill and Other Intangibles (Narrative) (Details) (USD $)	12 Months Ended			1 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Oct. 31, 2012	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013
				Intellectual Property [Member]	Intellectual Property [Member]	Developed Technology Rights [Member]	Developed Technology Rights [Member]	Developed Technology Rights [Member]	Noncompete Agreements [Member]	Noncompete Agreements [Member]	Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Finite-lived Intangible Assets Acquired	$6,268,000	$11,800,000	'	$6,300,000	'	$9,800,000	'	'	'	'	'
Finite Lived Intangible Assets Acquired, Cash Consideration	'	'	'	5,500,000	'	'	'	'	'	'	'
Finite lived intangible assets acquired, Non-cash consideration	'	'	'	800,000	'	'	'	'	'	'	'
Finite-Lived Intangible Asset, Useful Life	'	'	'	'	'15 years	'	'	'	'	'	'
Finite-Lived Intangible Assets, Net	'	'	18,386,000	'	5,800,000	7,600,000	'	'	'	'	'
Acquired Indefinite-lived Intangible Asset, Amount	'	'	'	'	'	'	'	8,800,000	'	3,000,000	'
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	'	'	'	'	'	'	'10 years	'	'9 years	'	'
Finite-Lived Intangible Assets, Purchase Accounting Adjustments	'	'	'	'	'	2,000,000	'	'	'	'	'
Other intangibles, net	$21,178,000	$19,417,000	$18,386,000	'	'	'	'	'	'	'	$4,900,000

Goodwill_and_Other_Intangibles3

Goodwill and Other Intangibles (Schedule of Intangible Assets and Goodwill) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'	'
Goodwill, Gross	$13,657	$13,653	'
Goodwill	13,657	13,653	13,606
Other intangibles, Gross amount	43,224	43,188	'
Other intangibles, Accumulated amortization	-24,838	-22,010	'
Other intangibles, net	18,386	21,178	19,417
Patents & Trademarks [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Other intangibles, Gross amount	33,440	33,404	'
Other intangibles, Accumulated amortization	-22,677	-20,847	'
Other intangibles, net	10,763	12,557	7,812
Other [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Other intangibles, Gross amount	9,784	9,784	'
Other intangibles, Accumulated amortization	-2,161	-1,163	'
Other intangibles, net	$7,623	$8,621	$11,605

Goodwill_and_Other_Intangibles4

Goodwill and Other Intangibles (Changes in Goodwill and Other Intangibles) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Roll Forward]	'	'	'
Beginning Balance, Goodwill	$13,653	$13,606	'
Acquisitions , Goodwill	'	0	'
Other, including foreign currency translation, Goodwill	4	47	'
Ending Balance, Goodwill	13,657	13,653	13,606
Finite-lived Intangible Assets [Roll Forward]	'	'	'
Beginning Balance, Other Intangibles	21,178	19,417	'
Acquisitions, Other Intangibles	'	6,268	11,800
Amortization expense	-2,828	-2,490	-1,628
Other, including foreign currency translation, Other Intangibles	36	-2,017	'
Ending Balance, Other Intangibles	18,386	21,178	19,417
Patents & Trademarks [Member]	'	'	'
Finite-lived Intangible Assets [Roll Forward]	'	'	'
Beginning Balance, Other Intangibles	12,557	7,812	'
Acquisitions, Other Intangibles	'	6,268	'
Amortization expense	-1,830	-1,523	'
Other, including foreign currency translation, Other Intangibles	36	0	'
Ending Balance, Other Intangibles	10,763	12,557	'
Other [Member]	'	'	'
Finite-lived Intangible Assets [Roll Forward]	'	'	'
Beginning Balance, Other Intangibles	8,621	11,605	'
Acquisitions, Other Intangibles	'	0	'
Amortization expense	-998	-967	'
Other, including foreign currency translation, Other Intangibles	0	-2,017	'
Ending Balance, Other Intangibles	$7,623	$8,621	'

Goodwill_and_Other_Intangibles5

Goodwill and Other Intangibles (Schedule of Amortization Expense by Income Statement Location) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Intangible Asset Amortization Expense [Line Items]	'	'	'
Amortization expense	$2,828	$2,490	$1,628
Research and Development Expense [Member]	'	'	'
Intangible Asset Amortization Expense [Line Items]	'	'	'
Amortization expense	399	92	0
Selling, General and Administrative Expenses [Member]	'	'	'
Intangible Asset Amortization Expense [Line Items]	'	'	'
Amortization expense	$2,429	$2,398	$1,628

Goodwill_and_Other_Intangibles6

Goodwill and Other Intangibles (Schedule of Expected Amortization Expense) (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'
2014	$2,849
2015	2,849
2016	2,849
2017	2,073
2018	1,417
Thereafter	6,349
Total	$18,386

Leases_Narrative_Details

Leases (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Leased Assets [Line Items]	'	'	'
Rental expense	$3,500,000	$3,400,000	$3,200,000
Asset retirement obligation	3,615,000	3,574,000	'
Danbury, Connecticut, Research and Development Facility [Member]	'	'	'
Operating Leased Assets [Line Items]	'	'	'
Operating Leases, Area	73,000	'	'
Lease Expiration Date	31-Dec-16	'	'
Monthly rent payments	47,500	'	'
Operating Leases, Number of Renewal Options	1	'	'
Operating Leases, Period of Renewal Option	'5 years	'	'
Asset retirement obligation	2,800,000	'	'
Danbury, Connecticut Corporate Headquarters [Member]	'	'	'
Operating Leased Assets [Line Items]	'	'	'
Operating Leases, Area	31,000	'	'
Lease Expiration Date	31-Dec-16	'	'
Monthly rent payments	$17,606	'	'
Operating Leases, Number of Renewal Options	1	'	'
Operating Leases, Period of Renewal Option	'5 years	'	'

Leases_Schedule_Of_Future_Mini

Leases (Schedule Of Future Minimum Lease Payments) (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Leases [Abstract]	'
2014	$2,760
2015	2,124
2016	1,570
2017	468
2018	209
Thereafter	268
Total minimum lease payments	$7,399

Leases_Schedule_Of_Change_In_A

Leases (Schedule Of Change In Asset Retirement Obligation) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'
Balance at December 31, 2012	$3,574
Liabilities settled	-8
Liabilities incurred	28
Accretion expense	54
Revisions in estimated cash flows	-33
Balance at December 31, 2013	$3,615

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Contingency [Line Items]	'	'	'
Tax expense (benefit) from discontinued operations	$700,000	($500,000)	($900,000)
Undistributed foreign earnings	88,500,000	'	'
Percentage of income taxes exempt, next fiscal year	50.00%	'	'
Unrecognized tax benefits that would impact the effective tax rate if recognized	2,300,000	3,600,000	3,700,000
Unrecognized tax benefits, accrued interest	300,000	600,000	400,000
Unrecognized tax benefits, accrued penalties	0	0	0
Unrecognized tax benefits	2,336,000	30,628,000	3,656,000
Income tax penalties expense	8,200,000	'	'
Interest on income taxes expense	200,000	'	'
Reversal of unrecognized tax benefits	27,000,000	'	'
Deferred Taxes [Member]	'	'	'
Income Tax Contingency [Line Items]	'	'	'
Unrecognized tax benefits that would impact the effective tax rate if recognized	200,000	'	'
Other Noncurrent Liabilities [Member]	'	'	'
Income Tax Contingency [Line Items]	'	'	'
Unrecognized tax benefits that would impact the effective tax rate if recognized	2,100,000	'	'
Foreign Tax Authority [Member]	'	'	'
Income Tax Contingency [Line Items]	'	'	'
Percentage of income taxes exempt	100.00%	'	'
Income tax exemption	900,000	2,300,000	2,800,000
Termination period	'7 years	'	'
Contract Termination [Member]	'	'	'
Income Tax Contingency [Line Items]	'	'	'
Unrecognized tax benefits	'	$27,000,000	'

Income_Taxes_PreTax_Income_Los

Income Taxes (Pre-Tax Income (Loss) From Continuing Operations) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
Domestic	$31,561	$41,970	($54,333)
Foreign	19,395	24,656	25,104
Income (loss) before income taxes	$50,956	$66,626	($29,229)

Income_Taxes_Components_Of_The

Income Taxes (Components Of The Provision (Benefit) For Income Taxes) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:	'	'	'
Federal	($3,817)	$12,001	$6,778
State	271	344	277
Foreign	5,082	1,638	2,632
Total current	1,536	13,983	9,687
Deferred:	'	'	'
Federal	10,951	3,210	-26,547
State	570	436	-2,070
Foreign	-860	702	665
Total deferred	10,661	4,348	-27,952
Provision for income taxes	$12,197	$18,331	($18,265)

Income_Taxes_Components_Of_The1

Income Taxes (Components Of The Company's Deferred Tax Assets And Liabilities) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Income Tax Disclosure [Abstract]	'	'
Accrued liabilities	$3,624	$4,581
Inventory reserves	2,166	2,227
Net operating loss and tax credit carryforwards	3,369	2,747
Equity-based compensation	7,929	8,613
Reacquired rights on contract termination	14,112	27,013
Other, net	747	96
Total deferred tax assets, gross	31,947	45,277
Valuation allowance	-574	-359
Total deferred tax assets, net of valuation allowance	31,373	44,918
Depreciation and amortization	-16,146	-20,525
Unrealized gain on marketable securities	0	-4,408
Other, net	-3,309	-3,184
Total deferred tax liabilities, gross	-19,455	-28,117
Net deferred tax assets	$11,918	$16,801

Income_Taxes_Deferred_Tax_Asse

Income Taxes (Deferred Tax Assets Related To Net Operation Loss And Tax Credit Carryforwards) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Net operating loss and tax credit carryforwards	$3,369	$2,747
Domestic Tax Authority [Member] | Capital Loss Carryforward [Member]	'	'
Other carryforward	472	'
Net operating loss and tax credit carryforwards	472	'
State and Local Jurisdiction [Member]	'	'
Other carryforward	54	'
Net operating loss carryforward, subject to expiration	478	'
Net operating loss carryforward, not subject to expiration	216	'
Net operating loss and tax credit carryforwards	748	'
Foreign Tax Authority [Member]	'	'
Other carryforward	990	'
Net operating loss carryforward, subject to expiration	161	'
Net operating loss carryforward, not subject to expiration	998	'
Net operating loss and tax credit carryforwards	$2,149	'

Income_Taxes_Schedule_Of_Effec

Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
U.S. statutory rate	$17,834	$23,319	($10,231)
State income taxes	312	507	-1,165
Foreign income taxes	-3,193	-6,675	-6,144
Change in valuation allowance of deferred tax assets	235	388	-347
Other, net	-2,991	792	-378
Provision for income taxes	$12,197	$18,331	($18,265)

Income_Taxes_Schedule_Of_Unrec

Income Taxes (Schedule Of Unrecognized Tax Benefits Roll Forward) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]	'	'
Unrecognized tax benefits, beginning balance	$30,628	$3,656
Increases from prior period positions	359	27,015
Decreases from prior period positions	-74	-159
Increases from current period positions	454	467
Decreases related to settlements with taxing authorities	-27,868	-224
Decreases from lapse of statute of limitations	-1,163	-127
Unrecognized tax benefits, ending balance	$2,336	$30,628

Defined_Contribution_Plan_Narr

Defined Contribution Plan (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Discretionary matching contributions	$1.50	$1.60	$1.60
Greater Than Zero And Less Than Three Percent Of Employee Salary [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Percentage of matching contribution percentage matched	100.00%	'	'
Matching contributions, as a percentage of the employee's eligible compensation	3.00%	'	'
Greater Than Three And Less Than Five Percent Of Employee Salary [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Percentage of matching contribution percentage matched	50.00%	'	'
Matching contributions, as a percentage of the employee's eligible compensation	2.00%	'	'
Greater Than Five Percent Of Employee Salary [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Percentage of matching contribution percentage matched	0.00%	'	'
Matching contributions, as a percentage of the employee's eligible compensation	5.00%	'	'

Stockholders_Equity_Narrative_

Stockholders' Equity (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
# of Shares Approved	4,000,000	'	'
Weighted-average fair value of options granted	$10.34	$11.66	$9.66
The Company's closing stock price	$30.21	'	'
Total intrinsic value of stock options exercised during the period	$2,400,000	$600,000	$100,000
Total fair value of options which vested during the period	1,800,000	1,900,000	1,700,000
Options vested during the period	184,000	203,000	184,000
Tax deficiency recognized in income tax expense from equity-based compensation	200,000	200,000	900,000
Total fair value of award vested during period	4,600,000	5,700,000	5,300,000
Share repurchase program, authorized amount	50,000,000	'	'
Cumulative treasury stock acquired through share repurchase programs	8,787,077	'	'
Cumulative treasury stock acquired through share repurchase programs, average cost per share	$27.80	'	'
Employee Stock Option [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Award expiration period	'10 years	'	'
Unrecognized compensation cost of award	2,100,000	'	'
Unrecognized compensation cost of award, weighted average period of recognition	'1 year 7 months 6 days	'	'
Restricted Stock [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Unrecognized compensation cost of award	8,900,000	'	'
Unrecognized compensation cost of award, weighted average period of recognition	'2 years 2 months 12 days	'	'
Restricted Stock Units (RSUs) [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Unrecognized compensation cost of award	$600,000	'	'
Unrecognized compensation cost of award, weighted average period of recognition	'1 year 2 months 12 days	'	'
Minimum [Member] | Employee Stock Option [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Award vesting period	'1 year	'	'
Minimum [Member] | Restricted Stock [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Award vesting period	'3 years	'	'
Maximum [Member] | Employee Stock Option [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Award vesting period	'4 years	'	'
Maximum [Member] | Restricted Stock [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Award vesting period	'5 years	'	'

Stockholders_Equity_Schedule_O

Stockholders' Equity (Schedule Of Employee Service Share-based Compensation, Allocation Of Recognized Period Costs) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Equity-based compensation expense	$6,781	$7,798	$7,078
Cost of Sales [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Equity-based compensation expense	161	232	406
Research and Development Expense [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Equity-based compensation expense	476	612	794
Selling, General and Administrative Expenses [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Equity-based compensation expense	$6,144	$6,954	$5,878

Stockholders_Equity_Summary_Of

Stockholders' Equity (Summary Of Share-Based Compensation Plans) (Details)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
# of Shares Approved	4,000,000
# of Shares Available	2,416,000
Exercise price as a percentage of common stock fair market value	100.00%
Employee purchase rate, percentage of closing price	95.00%
2010 Stock Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
# of Shares Approved	3,000,000	[1]
# of Shares Available	2,189,000	[1]
Employee Stock Purchase Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
# of Shares Approved	1,000,000	[2]
# of Shares Available	227,000	[2]
[1]	Exercise prices for ISOs and non-qualified stock options granted under this plan may not be less than 100 percent of the fair market value for the Company’s common stock on the date of grant.
[2]	Employees may purchase shares at 95 percent of the closing price on the day previous to the last day of each six-month offering period. This plan is not considered to be compensatory.

Stockholders_Equity_Schedule_O1

Stockholders' Equity (Schedule Of Stock Option Valuation Assumptions) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'	'
Risk free interest rate	1.59%	1.52%	3.15%
Expected term, in years	'7 years 11 months 1 day	'7 years 10 months 13 days	'7 years 10 months 6 days
Expected volatility	41.00%	42.84%	43.30%
Dividend yield	0.00%	0.00%	0.00%

Stockholders_Equity_Schedule_O2

Stockholders' Equity (Schedule Of Share-Based Compensation, Stock Options, Activity) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'
Outstanding, Number of Options, Beginning Balance	1,528
Granted, Number of Options	180
Exercised, Number of Options	-391
Forfeited, Number of Options	-47
Expired, Number of Options	-109
Outstanding, Number of Options, Ending Balance	1,161
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]	'
Outstanding, Average Exercise Price, Beginning Balance	$21.98
Granted, Average Exercise Price	$21.92
Exercised, Average Exercise Price	$19.87
Forfeited, Average Exercise Price	$20.65
Expired, Average Exercise Price	$27.48
Outstanding, Average Exercise Price, Ending Balance	$22.22
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]	'
Exercisable, Number of Options	822
Exercisable, Average Exercise Price	$22.57
Outstanding, Average Remaining Life	'5 years 4 months 24 days
Exercisable, Average Remaining Life	'4 years 2 months 12 days
Outstanding, Aggregate Intrinsic Value	$9,409
Exercisable, Aggregate Intrinsic Value	$6,401

Stockholders_Equity_Schedule_O3

Stockholders' Equity (Schedule Of Nonvested Restricted Stock Units Activity) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]	'
Nonvested, Number of Shares, Beginning of period	1,073
Granted, Number of Shares	340
Vested, Number of Shares	-255
Forfeited, Number of Shares	-152
Nonvested, Number of Shares, End of period	1,006
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]	'
Nonvested, Average Grant Date Fair Value, Beginning of period	$18.75
Granted, Average Grant Date Fair Value	$22.47
Vested, Average Grant Date Fair Value	$18
Forfeited, Average Grant Date Fair Value	$19.17
Nonvested, Average Grant Date Fair Value, End of period	$20.14

Stockholders_Equity_Computatio

Stockholders' Equity (Computation Of Earnings Per Share) (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, except Per Share data, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Earnings Per Share [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Income (loss) from continuing operations

$6,388

[1]

$10,492

$11,669

[2]

$10,210

$11,909

$16,857

$13,172

$6,357

$38,759

$48,295

($10,964)

Weighted average shares outstanding — basic (in shares)

'

'

'

'

'

'

'

'

31,911

31,931

31,703

Weighted average shares outstanding — diluted (in shares)

'

'

'

'

'

'

'

'

32,751

32,664

31,703

Earnings (loss) per common share from continuing operations (in dollars per share)

$0.20

$0.33

$0.37

$0.32

$0.37

$0.53

$0.41

$0.20

$1.21

$1.51

($0.35)

Earnings (loss) per common share from continuing operations (in dollars per share)

$0.19

$0.32

$0.36

$0.31

$0.36

$0.52

$0.40

$0.19

$1.18

$1.48

($0.35)

Employee Stock Option [Member]

'

'

'

'

'

'

'

'

'

'

'

Earnings Per Share [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Weighted average shares outstanding — basic (in shares)

'

'

'

'

'

'

'

'

162

168

0

Restricted Stock [Member]

'

'

'

'

'

'

'

'

'

'

'

Earnings Per Share [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Weighted average shares outstanding — basic (in shares)

'

'

'

'

'

'

'

'

678

565

0

[1]

Includes $11.5 million impairment charge related to our HPD assets.

[2]

Includes a $1.1 million gain on sale of marketable securities.

Stockholders_Equity_Antidiluti

Stockholders' Equity (Antidilutive Securities Excluded from Computation) (Details)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'	'	'
Antidilutive shares	581	1,069	2,144

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Components Of Accumulated Other Comprehensive Income) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income [Roll Forward]	'	'	'
Currency Translation Adjustments, Begining Balance	$6,300	$1,070	$4,167
Cumulative translation adjustment	1,703	5,230	-3,097
Currency Translation Adjustment, Ending Balance	8,003	6,300	1,070
Unrealized Gain (Loss) on Available-for-Sale Securities, Begining Balance	8,230	6,979	-139
Reclassification adjustment related to marketable securities in net unrealized gain position at prior period end, net of tax	-3,489	854	-1
Change in fair value on available-for-sale securities, net of deferred income tax of $3,215, $326, and $4,351, respectively.	-5,592	397	7,119
Unrealized Gain (Loss) on Available-for-Sale Securities, Ending Balance	-851	8,230	6,979
Unrealized Gain (Loss) on Derivative Instruments, Beginning Balance	1,098	0	0
Change in fair value of derivative financial instruments, net of deferred income tax of $615 and $636, respectively.	1,080	1,098	0
Reclassification adjustment related to the settlement of derivative financial instruments in a net unrealized gain position, net of $455 tax provision, respectively.	-799	0	0
Unrealized Gain (Loss) on Derivative Instruments, Ending Balance	1,379	1,098	0
Begining Balance	15,628	8,049	4,028
Ending Balance	8,531	15,628	8,049
Reclassification adjustment related to marketable securities in net unrealized gain position at prior period end, tax	1,625	-495	0
Reclassification adjustment related to the settlement of derivative financial instruments in a net unrealized gain position	455	'	'
Change in fair value of available-for-sale securities, tax	-3,215	326	4,351
Change in fair value of derivative financial instruments, tax	$615	$636	'

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income (Reclassifications Out Of Accumulated Other Comprehensive Income) (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

$94,844

$87,925

$90,064

$88,126

$89,180

$98,459

[1]

$94,745

$83,465

$360,959

$365,849

$351,823

Cost of revenues

'

'

'

'

'

'

'

'

-185,013

-179,258

-181,101

Total before tax

'

'

'

'

'

'

'

'

50,956

66,626

-29,229

Estimated tax expense

'

'

'

'

'

'

'

'

-12,197

-18,331

18,265

Net of estimated tax

3,844

8,448

9,447

8,426

12,620

14,425

11,423

3,862

30,165

42,330

-20,019

Reclassification out of Accumulated Other Comprehensive Income [Member]

'

'

'

'

'

'

'

'

'

'

'

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Net of estimated tax

'

'

'

'

'

'

'

'

4,288

'

'

Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Foreign Exchange Contract [Member]

'

'

'

'

'

'

'

'

'

'

'

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

1,442

'

'

Cost of revenues

'

'

'

'

'

'

'

'

-188

'

'

Total before tax

'

'

'

'

'

'

'

'

1,254

'

'

Estimated tax expense

'

'

'

'

'

'

'

'

-455

'

'

Net of estimated tax

'

'

'

'

'

'

'

'

799

'

'

Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]

'

'

'

'

'

'

'

'

'

'

'

Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Total before tax

'

'

'

'

'

'

'

'

5,114

'

'

Estimated tax expense

'

'

'

'

'

'

'

'

-1,625

'

'

Net of estimated tax

'

'

'

'

'

'

'

'

$3,489

'

'

[1]

Includes $2.6 million from IP settlement, which represents the settlement of royalties for periods prior to the third quarter of 2013.

Commitments_Contingencies_and_1

Commitments, Contingencies, and Other (Details) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'	'	'
Long-term Purchase Commitment, Amount	$16	'	$60
Repayments of Long-term Purchase Commitment, Amount	'	'	3
Commitments for inventory purchases	'	'	57
Long-term Purchase Commitment, Time Period	'2 years	'10 years	'
Purchases Made Under Long Term Purchase Commitment	'	'	8
Remaining Long Term Purchase Commitment Amount	'	'	8
Long-term Purchase Commitment [Line Items]	'	'	'
Cash payment commitment	'	6.9	2.6
Research and Development Arrangement [Member]	'	'	'
Long-term Purchase Commitment [Line Items]	'	'	'
Cash payment commitment	'	'	$1.30

Segments_Narrative_Details

Segments (Narrative) (Details)	12 Months Ended
	Dec. 31, 2013
	segment
Segment Reporting [Abstract]	'
Number of reportable segments	1

Segments_Revenue_By_Product_Li

Segments (Revenue By Product Line) (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Revenue from External Customer [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Total revenues

$94,844

$87,925

$90,064

$88,126

$89,180

$98,459

[1]

$94,745

$83,465

$360,959

$365,849

$351,823

Implant [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenue from External Customer [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Total revenues

'

'

'

'

'

'

'

'

112,918

100,289

77,450

Display [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenue from External Customer [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Total revenues

'

'

'

'

'

'

'

'

26,206

31,902

34,663

Photo I.C. [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenue from External Customer [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Total revenues

'

'

'

'

'

'

'

'

24,020

24,271

27,033

Copper Materials [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenue from External Customer [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Total revenues

'

'

'

'

'

'

'

'

174,890

191,051

193,420

Other Microelctronics [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenue from External Customer [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Total revenues

'

'

'

'

'

'

'

'

20,394

18,002

18,851

Other Products [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenue from External Customer [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Total revenues

'

'

'

'

'

'

'

'

$2,531

$334

$406

[1]

Includes $2.6 million from IP settlement, which represents the settlement of royalties for periods prior to the third quarter of 2013.

Geographic_Data_Schedule_Of_Re

Geographic Data (Schedule Of Revenues from External Customers And Long-Lived Assets) (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Revenues from External Customers and Long-Lived Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

$94,844

$87,925

$90,064

$88,126

$89,180

$98,459

[1]

$94,745

$83,465

$360,959

$365,849

$351,823

Long-Lived Assets

169,225

'

'

'

164,398

'

'

'

169,225

164,398

133,697

U.S.

'

'

'

'

'

'

'

'

'

'

'

Revenues from External Customers and Long-Lived Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

59,766

63,248

65,990

Long-Lived Assets

127,377

'

'

'

136,578

'

'

'

127,377

136,578

112,579

Taiwan

'

'

'

'

'

'

'

'

'

'

'

Revenues from External Customers and Long-Lived Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

99,154

98,643

97,289

Long-Lived Assets

4,796

'

'

'

6,409

'

'

'

4,796

6,409

6,037

Japan

'

'

'

'

'

'

'

'

'

'

'

Revenues from External Customers and Long-Lived Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

40,976

48,437

43,292

Long-Lived Assets

783

'

'

'

2,599

'

'

'

783

2,599

7,872

South Korea

'

'

'

'

'

'

'

'

'

'

'

Revenues from External Customers and Long-Lived Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

74,242

85,402

78,777

Long-Lived Assets

33,334

'

'

'

18,076

'

'

'

33,334

18,076

6,440

China

'

'

'

'

'

'

'

'

'

'

'

Revenues from External Customers and Long-Lived Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

38,921

24,341

23,651

Long-Lived Assets

2,456

'

'

'

343

'

'

'

2,456

343

355

Other Pacific Rim

'

'

'

'

'

'

'

'

'

'

'

Revenues from External Customers and Long-Lived Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

25,419

22,125

24,215

Long-Lived Assets

266

'

'

'

152

'

'

'

266

152

137

Europe and Other

'

'

'

'

'

'

'

'

'

'

'

Revenues from External Customers and Long-Lived Assets [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

22,481

23,653

18,609

Long-Lived Assets

$213

'

'

'

$241

'

'

'

$213

$241

$277

[1]

Includes $2.6 million from IP settlement, which represents the settlement of royalties for periods prior to the third quarter of 2013.

Quarterly_Results_Of_Operation1

Quarterly Results Of Operations (Details) (USD $)	3 Months Ended															12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012	Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]	'		'		'		'		'	'		'		'		'	'	'
Revenues	$94,844,000		$87,925,000		$90,064,000		$88,126,000		$89,180,000	$98,459,000	[1]	$94,745,000		$83,465,000		$360,959,000	$365,849,000	$351,823,000
Gross profit	47,384,000		41,795,000		44,169,000		42,598,000		44,603,000	51,503,000		49,235,000		41,250,000	[2]	175,946,000	186,591,000	170,722,000
Operating income	7,214,000	[3]	12,956,000	[4]	15,025,000		12,201,000	[5]	14,948,000	23,175,000		18,699,000	[6]	8,962,000		47,396,000	65,784,000	-29,346,000
Income from continuing operations	6,388,000	[7]	10,492,000		11,669,000	[8]	10,210,000		11,909,000	16,857,000		13,172,000		6,357,000		38,759,000	48,295,000	-10,964,000
Income (loss) from discontinued operations, net of taxes	-2,544,000		-2,044,000		-2,222,000		-1,784,000		711,000	-2,432,000		-1,749,000		-2,495,000		-8,594,000	-5,965,000	-9,055,000
Net income (loss)	3,844,000		8,448,000		9,447,000		8,426,000		12,620,000	14,425,000		11,423,000		3,862,000		30,165,000	42,330,000	-20,019,000
Earnings per common share from continuing operations (in dollars per share)	$0.20		$0.33		$0.37		$0.32		$0.37	$0.53		$0.41		$0.20		$1.21	$1.51	($0.35)
Earnings per common share from continuing operations (in dollars per share)	$0.19		$0.32		$0.36		$0.31		$0.36	$0.52		$0.40		$0.19		$1.18	$1.48	($0.35)
Severance expense	'		800,000		'		1,800,000		'	'		'		'		2,600,000	'	'
Marketable securities, gain (loss)	1,200,000		'		1,100,000		'		'	'		-500,000		'		'	'	'
Impairment charges	11,500,000		'		'		'		'	'		'		'		'	'	'
Logistics and freight costs	'		'		'		'		'	'		'		1,500,000		'	'	'
Payment of royalties	'		'		'		'		'	$2,600,000		'		'		'	'	'
[1]	Includes $2.6 million from IP settlement, which represents the settlement of royalties for periods prior to the third quarter of 2013.
[2]	Includes $1.5 million capitalization of certain logistics and freight costs into inventory.
[3]	Includes a $1.2 million gain on sale of marketable securities.
[4]	Includes $0.8 million of severance costs associated with an action to reduce operational infrastructure with the objective of streamlining operations.
[5]	Includes $1.8 million of severance costs in order to better streamline business activities with our customers and partners.
[6]	Includes a $0.5 million recognized loss on the sale of an auction rate security.
[7]	Includes $11.5 million impairment charge related to our HPD assets.
[8]	Includes a $1.1 million gain on sale of marketable securities.

Subsequent_Events_Subsequent_E

Subsequent Events Subsequent Events (Narrative) (Details) (USD $)	Dec. 31, 2013	Dec. 22, 2013	Feb. 04, 2014	Feb. 04, 2014
		Discontinued Operations [Member]	Subsequent Event [Member]	Subsequent Event [Member]
			Entegris [Member]	Entegris [Member]
				Common Stock [Member]
Subsequent Event [Line Items]	'	'	'	'
Proceeds from Divestiture of Businesses	'	$185,000,000	'	'
Share Price	$30.21	'	'	$34
Business Combination, Acquisition Related Costs, Termination Provision, Period One	'	'	30,000,000	'
Business Combination, Acquisition Related Costs, Termination Provision, Period Two	'	'	$100,000,000	'
Debt Instrument, Covenant, Capital Expenditures, Minimum	'	'	'	10.00%

Schedule_II_Valuation_And_Qual1

Schedule II, Valuation And Qualifying Accounts (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for Sales Returns [Member]	'	'	'
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'
Beginning balance	$881	$781	$783
Provision charged to income	2	100	0
Write-offs	0	0	0
Other adjustments	0	0	-2
Ending balance	883	881	781
Inventory Valuation Reserve [Member]	'	'	'
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'
Beginning balance	2,886	2,165	1,843
Provision charged to income	1,430	1,560	555
Write-offs	-1,032	-748	-430
Other adjustments	-346	-91	197
Ending balance	2,938	2,886	2,165
Valuation Allowance of Deferred Tax Assets [Member]	'	'	'
Valuation and Qualifying Accounts Disclosure [Line Items]	'	'	'
Beginning balance	359	1,318	1,983
Provision charged to income	235	388	284
Write-offs	0	0	-631
Other adjustments	-20	-1,347	-318
Ending balance	$574	$359	$1,318