National Instruments (NATI) 10-Q 1 Aug 17 2017 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Jul. 25, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2,017
Entity Registrant Name	NATIONAL INSTRUMENTS CORP /DE/
Entity Central Index Key	935,494
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		130,493,232

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 263,150	$ 285,283
Short-term investments	105,284	73,117
Accounts receivable, net	230,958	228,686
Inventories, net	186,155	193,608
Prepaid expenses and other current assets	52,568	53,953
Total current assets	838,115	834,647
Property and equipment, net	256,761	260,456
Goodwill	261,411	253,197
Intangible assets, net	120,327	108,663
Other long-term assets	28,700	39,601
Total assets	1,505,314	1,496,564
Current liabilities:
Accounts payable	54,214	48,800
Accrued compensation	36,672	27,743
Deferred revenue - current	120,212	115,577
Accrued expenses and other liabilities	15,341	32,997
Other taxes payable	28,743	34,958
Total current liabilities	255,182	260,075
Long-term debt	25,000	25,000
Deferred income taxes	35,561	45,386
Liability for uncertain tax positions	12,438	11,719
Deferred revenue- long term	31,665	29,752
Other long-term liabilities	7,420	10,413
Total liabilities	367,266	382,345
Commitments and contingencies
Stockholders' equity:
Preferred stock: par value $0.01; 5,000,000 shares authorized; none issued and outstanding
Common stock: par value $0.01; 360,000,000 shares authorized; 130,493,232 shares and 129,202,979 shares issued and outstanding, respectively	1,305	1,292
Additional paid-in capital	800,774	771,346
Retained earnings	359,088	376,202
Accumulated other comprehensive loss	(23,119)	(34,621)
Total stockholders' equity	1,138,048	1,114,219
Total liabilities and stockholders' equity	$ 1,505,314	$ 1,496,564

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2017	Dec. 31, 2016
Consolidated Balance Sheets [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	360,000,000	360,000,000
Common stock, shares issued	130,493,232	129,202,979
Common stock, shares outstanding	130,493,232	129,202,979

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net sales:
Product	$ 289,817	$ 278,530	$ 561,328	$ 537,963
Software maintenance	28,792	27,575	57,386	55,319
Total net sales	318,609	306,105	618,714	593,282
Cost of sales:
Product	79,153	75,194	154,349	149,404
Software maintenance	3,307	2,314	4,635	4,250
Total cost of sales	82,460	77,508	158,984	153,654
Gross profit	236,149	228,597	459,730	439,628
Operating expenses:
Sales and marketing	124,414	116,361	241,674	229,568
Research and development	56,913	59,839	115,175	119,179
General and administrative	26,191	25,130	51,933	49,770
Total operating expenses	207,518	201,330	408,782	398,517
Operating income	28,631	27,267	50,948	41,111
Other income:
Interest income	509	258	852	511
Net foreign exchange gain (loss)	447	(1,285)	529	(711)
Other gain(loss), net	(235)	53	197	(2,353)
Income before income taxes	29,352	26,293	52,526	38,558
Provision for income taxes	4,197	6,493	9,223	9,460
Net income	$ 25,155	$ 19,800	$ 43,303	$ 29,098
Basic earnings per share	$ 0.19	$ 0.15	$ 0.33	$ 0.23
Weighted average shares outstanding - basic	130,197	128,282	129,820	127,938
Diluted earnings per share	$ 0.19	$ 0.15	$ 0.33	$ 0.23
Weighted average shares outstanding - diluted	131,117	128,746	130,619	128,429
Dividends declared per share	$ 0.21	$ 0.20	$ 0.42	$ 0.40

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Consolidated Statements Of Comprehensive Income [Abstract]
Net income	$ 25,155	$ 19,800	$ 43,303	$ 29,098
Other comprehensive income, before tax and net of reclassification adjustments:
Foreign currency translation adjustment	11,702	(6,191)	15,664	8,166
Unrealized gain on securities available-for-sale	34	211	26	549
Unrealized (loss) gain on derivative instruments	(3,522)	138	(6,334)	3,565
Other comprehensive (loss) gain, before tax	8,214	(5,842)	9,356	12,280
Tax (benefit) expense related to items of other comprehensive income	(1,186)	(1,436)	(2,146)	3,275
Other comprehensive (loss) gain, net of tax	9,400	(4,406)	11,502	9,005
Comprehensive income	$ 34,555	$ 15,394	$ 54,805	$ 38,103

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flow from operating activities:
Net income	$ 43,303	$ 29,098
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	35,915	38,217
Stock-based compensation	13,726	13,497
Tax expense from deferred income taxes	(875)	(2,927)
Changes in operating assets and liabilities	(7,284)	2,659
Net cash provided by operating activities	84,785	80,544
Cash flow from investing activities:
Capital expenditures	(15,727)	(20,970)
Capitalization of internally developed software	(24,816)	(15,406)
Additions to other intangibles	(1,124)	(689)
Acquisitions, net of cash received		(549)
Purchases of short-term investments	(52,807)	(5,008)
Sales and maturities of short-term investments	21,017	31,734
Net cash used in investing activities	(73,457)	(10,888)
Cash flow from financing activities:
Proceeds from revolving line of credit		15,000
Principal payments on revolving line of credit		(12,000)
Proceeds from issuance of common stock	15,407	14,830
Repurchase of common stock		(5,635)
Dividends paid	(54,595)	(51,273)
Net cash used in financing activities	(39,188)	(39,078)
Effect of exchange rate changes on cash	5,727	3,554
Net change in cash and cash equivalents	(22,133)	34,132
Cash and cash equivalents at beginning of period	285,283	251,129
Cash and cash equivalents at end of period	$ 263,150	$ 285,261

Basis Of Presentation

Basis Of Presentation	6 Months Ended
	Jun. 30, 2017
Basis Of Presentation [Abstract]
Basis Of Presentation	Note 1 – Basis of presentation The accompanying unaudited consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto for the year ended December 31, 2016 , included in our annual report on Form 10-K, filed with the Securities and Exchange Commission. In our opinion, the accompanying consolidated financial statements reflect all adjustments (consisting only of normal recurring items) considered necessary to present fairly our financial position at June 30, 2017 and December 31, 2016, the results of our operations and comprehensive income for the three and six month periods ended June 30, 2017 and 2016, and the cash flows for the six month periods ended June 30, 2017 and 2016. Our operating results for the three and six month periods ended June 30, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017. These financial statements have been prepared in accordance with accounting principles generally accepted in the United States.  Starting January 1, 2017, we began separately presenting the effect of exchange rate changes on cash and cash equivalents in our condensed consolidated statements of cash flows due to growing operations in foreign currency environments. Amounts in the comparable prior period have been reclassified to conform to the current period presentation. The reclassifications resulted in the disaggregation of the amount attributable to the “Effect of exchange rate changes on cash” of $3.6 million, with a corresponding decrease to “Net cash provided by operating activities” for the six month period ended June 30, 2016. We believe the reclassification is immaterial to the consolidated financial statements.  Recently Adopted Accounting Pronouncements  In October 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-16, Income Taxes – Intra-Entity Transfers of Assets Other Than Inventory. The standard is intended to address diversity in practice and complexity in financial reporting, particularly for intra-entity transfers of intellectual property. We early adopted ASU 2016-16 effective January 1, 2017. Using the modified retrospective method, the impact of the adoption of the standard was to increase deferred tax assets by $0.4 million, decrease other assets, net by $6.2 million and decrease retained earnings by $5.8 million. The adoption of the amendments had the effect of increasing our diluted earnings per share by $0.01 and $0.02 for the three and six month periods ended June 30, 2017, respectively.  Recently Issued Accounting Pronouncements  In February 2016, the FASB issued ASU 2016-02 , Leases (Topic 842) , which supersedes ASC840, Leases . The guidance requires lessees to recognize most lease liabilities on their balance sheets but recognize the expenses on their income statements in a manner similar to current practice. The update states that a lessee would recognize a lease liability for the obligation to make lease payments and a right-to-use asset for the right to use the underlying asset for the lease term. The update is effective for interim and annual periods beginning after December 15, 2018, and early adoption is permitted. We are currently evaluating the effect that the updated standard will have on our Consolidated Financial Statements and related disclosures. We do not expect to adopt the new standard prior to the required effective date.  In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606) . The update is a comprehensive new revenue recognition model that requires a company to recognize revenue to depict the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. ASU 2014-09 also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. As currently issued and amended, ASU 2014-09 is effective for annual reporting periods, and interim periods within that period, beginning after December 15, 2017 and early adoption is permitted for annual reporting periods, and interim periods within that period, beginning after December 31, 2016. We intend to adopt this standard as of January 1, 2018 by applying the modified retrospective transition method. Consequently, the cumulative effect of applying the new standard to existing contracts as of January 1, 2018 will be recognized as an adjustment to the opening balance of equity in the first quarter of 2018.  We anticipate ASU 2014-09, as amended, could have a material impact on our consolidated financial statements and disclosures. We have reached initial conclusions on our key accounting matters related to the new standard and believe adoption of the new standard will generally result in revenue recognition earlier or at the same time as existing US GAAP. The most significant impact of the standard relates to our accounting for certain software arrangements. We primarily license software on a perpetual basis. However, we also license software under enterprise agreements which includes an unlimited quantity of certain software licenses for a fixed-term bundled with software maintenance, technical support, and a specified amount of training and service credits. Currently, we defer revenue for software licensed under our enterprise agreements and certain perpetual arrangements due to a lack of vendor specific objective evidence (“VSOE”) for certain elements in the contract. Under the new standard, we are no longer required to establish VSOE to recognize software license revenue separately from the other elements, and we will be able to recognize software license revenue once the customer obtains control of the license, which will generally occur at the start of each license term. Due to the complexity of our enterprise agreement contracts, the actual revenue recognition treatment required under the new standard will be dependent on contract-specific terms, and may vary in some instances from recognition at the time of billing. Additionally, we expect the new standard will impact the way we allocate the transaction price for arrangements with separately-priced extended warranty offerings. We will continue to monitor and assess the impact of changes to the standard and interpretations as they become available.  Other Updates  The FASB also issued the following ASUs which are not expected to have a material impact on our financial condition, results of operations or cash flows upon adoption:  · ASU 2017-11—Earnings Per Share (Topic 260); Distinguishing Liabilities from Equity (Topic 480); Derivatives and Hedging (Topic 815): (Part I) Accounting for Certain Financial Instruments with Down Round Features, (Part II) Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial Instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception  · ASU 2017-10—Service Concession Arrangements (Topic 853): Determining the Customer of the Operation Services (a consensus of the FASB Emerging Issues Task Force) · ASU 2017-09—Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting · ASU 2017-08—Receivables—Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities · ASU 2017-07 —Compensation—Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost · ASU 2017-06—Plan Accounting: Defined Benefit Pension Plans (Topic 960), Defined Contribution Pension Plans (Topic 962), Health and Welfare Benefit Plans (Topic 965): Employee Benefit Plan Master Trust Reporting (a consensus of the Emerging Issues Task Force) · ASU 2017-05—Other Income—Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets  ASU 2016-18—Statement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Issues Task Force)

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	 Note 2 – Earnings per share Basic earnings per share (“EPS”) is computed by dividing net income by the weighted average number of common shares outstanding during each period. Diluted EPS is computed by dividing net income by the weighted average number of common shares and common share equivalents outstanding (if dilutive) during each period. The number of common share equivalents, which include s restricted stock units (“RSUs”), is computed using the treasury stock method.  The reconciliation of the denominators used to calculate basic EPS and diluted EPS for the three and six month periods ended June 30, 2017 and 2016 , are as follows:    Three Months Ended June 30, Six Months Ended June 30,  (In thousands) (In thousands)  (Unaudited) (Unaudited)  2017 2016 2017 2016  Weighted average shares outstanding-basic 130,197 128,282 129,820 127,938  Plus: Common share equivalents  RSUs 920 464 799 491  Weighted average shares outstanding-diluted 131,117 128,746 130,619 128,429 Stock awards to acquire 6,800 shares and 51,000 shares for the three months ended June 30, 2017 and 2016, respectively, and 13,500 shares and 333,000 shares for the six month periods ended June 30, 2017 and 2016, respectively, were excluded in the computations of diluted EPS because the effect of including the stock awards would have been anti-dilutive.

Short-Term Investments

Short-Term Investments	6 Months Ended
	Jun. 30, 2017
Short-Term Investments [Abstract]
Short-Term Investments	 No te 3 – Short -term investments The following tables summarize unrealized gains and losses related to our short-term investments designated as available-for-sale:    As of June 30, 2017  (In thousands) (Unaudited)  Gross Gross Cumulative  Adjusted Cost Unrealized Gain Unrealized Loss Translation Adjustment Fair Value  Corporate bonds 92,561 78 (145) (1,466) 91,028  U.S. treasuries and agencies 12,496 - - - 12,496  Time deposits 1,760 - - - 1,760  Short-term investments $ 106,817 $ 78 $ (145) $ (1,466) $ 105,284     (In thousands) December 31, 2016  Gross Gross Cumulative  Adjusted Cost Unrealized Gain Unrealized Loss Translation Adjustment Fair Value  Corporate bonds 72,986 89 (182) (1,536) 71,357  Time deposits 1,760 - - - 1,760  Short-term investments $ 74,746 $ 89 $ (182) $ (1,536) $ 73,117 The following tables summarize the contractual maturities of our short-term investments designated as available-for-sale:    As of June 30, 2017  (In thousands) (Unaudited)  Adjusted Cost Fair Value  Due in less than 1 year $ 29,189 $ 29,180  Due in 1 to 5 years 77,628 76,104  Total available-for-sale debt securities $ 106,817 $ 105,284   Due in less than 1 year Adjusted Cost Fair Value  Corporate bonds $ 14,933 $ 14,924  U.S. treasuries and agencies 12,496 12,496  Time deposits 1,760 1,760  Total available-for-sale debt securities $ 29,189 $ 29,180   Due in 1 to 5 years Adjusted Cost Fair Value  Corporate bonds $ 77,628 $ 76,104  Total available-for-sale debt securities $ 77,628 $ 76,104

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2017
Fair Value Measurements [Abstract]
Fair Value Measurements	Note 4 – Fair value measurements We define fair value to be the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, we consider the principal or most advantageous market that market participants may use when pricing the asset or liability. We follow a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. Fair value measurement is determined based on the lowest level input that is significant to the fair value measurement. The three values of the fair value hierarchy are the following: Level 1 – Quoted prices in active markets for identical assets or liabilities Level 2 – Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly Level 3 – Inputs that are not based on observable market data Assets and liabilities measured at fair value on a recurring basis are summarized below:     Fair Value Measurements at Reporting Date Using  (In thousands) (Unaudited)  Description June 30, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  Assets  Cash and cash equivalents available for sale:  Money Market Funds $ 15,951 $ 15,951 $ - $ -  U.S. treasuries and agencies 42,348 - 42,348  Short-term investments available for sale:  Corporate bonds 91,028 - 91,028 -  U.S. treasuries and agencies 12,496 - 12,496  Time deposits 1,760 1,760 - -  Derivatives 5,665 - 5,665 -  Total Assets $ 169,248 $ 17,711 $ 151,537 $ -   Liabilities  Derivatives $ (7,371) $ - $ (7,371) $ -  Total Liabilities $ (7,371) $ - $ (7,371) $ -    (In thousands) Fair Value Measurements at Reporting Date Using  Description December 31, 2016 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  Assets  Cash and cash equivalents available for sale:  Money Market Funds $ 68,577 $ 68,577 $ - $ -  Short-term investments available for sale:  Corporate bonds 71,357 - 71,357 -  Time deposits 1,760 1,760 - -  Derivatives 15,113 - 15,113 -  Total Assets $ 156,807 $ 70,337 $ 86,470 $ -   Liabilities  Derivatives $ (8,199) $ - $ (8,199) $ -  Total Liabilities $ (8,199) $ - $ (8,199) $ -  We value our available-for-sale short-term investments based on pricing from third party pricing vendors, who may use quoted prices in active markets for identical assets (Level 1 inputs) or inputs other than quoted prices that are observable either directly or indirectly (Level 2 inputs) in determining fair value. We classify all of our fixed income available-for-sale securities as having Level 2 inputs. The valuation techniques used to measure the fair value of our financial instruments having Level 2 inputs were derived from non-binding market consensus prices that are corroborated by observable market data, quoted market prices for similar instruments, or pricing models, such as discounted cash flow techniques. We believe all of these sources reflect the credit risk associated with each of our available-for-sale short-term investments. Short-term investments available-for-sale consists of debt securities issued by states of the U.S. and political subdivisions of the U.S., corporate debt securities and debt securities issued by U.S. government organizations and agencies. All of our short-term investments available-for-sale have contractual maturities of less than 60 months. Derivatives include foreign currency forward and option contracts. Our foreign currency forward contracts are valued using an income approach (Level 2) based on the spot rate less the contract rate multiplied by the notional amount. Our foreign currency option contracts are valued using a market approach based on the quoted market prices which are derived from observable inputs including current and future spot rates, interest rate spreads as well as quoted market prices of similar instruments. We consider counterparty credit risk in the valuation of our derivatives. However, counterparty credit risk did not impact the valuation of our derivatives during the six month period ended June 30, 2017 . There were no transfers in or out o f Level 1 or Level 2 during the six month period ended June 30, 2017 . As of June 30, 2017, our short-term investments did not include sovereign debt from any country other than the United States. We did not have any items that were measured at fair value on a nonrecurring basis at June 30, 2017 and December 31, 2016 . The carrying value of net accounts receivable, accounts payable, and long-term debt contained in the Consolidated Balance Sheets approximates fair value.

Derivative Instruments And Hedg

Derivative Instruments And Hedging Activities	6 Months Ended
	Jun. 30, 2017
Derivative Instruments And Hedging Activities [Abstract]
Derivative Instruments And Hedging Activities	Note 5 – Derivative instruments and hedging activities We recognize all of our derivative instruments as either assets or liabilities in our statement of financial position at fair value. The accounting for changes in the fair value (i.e., gains or losses) of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and further, on the type of hedging relationship. For those derivative instruments that are designated and qualify as hedging instruments, we designate the hedging instrument, based upon the exposure being hedged, as a fair value hedge, cash flow hedge, or a hedge of a net investment in a foreign operation. We have operations in over 50 countries. Sales outside of the Americas accounted for approximately 62% and 63% of our net sales during the three month periods ended June 30, 2017 and 2016, respectively, and approximately 61% and 62% of our net sales during the six month periods ended June 30, 2017 and 2016 , respectively. Our activities expose us to a variety of market risks, including the effects of changes in foreign currency exchange rates. These financial risks are monitored and managed by us as an integral part of our overall risk management program. We maintain a foreign currency risk management strategy that uses derivative instruments (foreign currency forward and purchased option contracts) to help protect our earnings and cash flows from fluctuations caused by the volatility in currency exchange rates. Movements in foreign currency exchange rates pose a risk to our operations and competitive position, in that exchange rate changes may affect our profitability and cash flow, and the business or pricing strategies of our non-U.S. based competitors. The vast majority of our foreign sales are denominated in the customers’ local currency. We purchase foreign currency forward and option contracts as hedges of forecasted sales that are denominated in foreign currencies and as hedges of foreign currency denominated financial assets or liabilities. These contracts are entered into to help protect against the risk that the eventual dollar-net-cash inflows resulting from such sales or firm commitments will be adversely affected by changes in exchange rates. We also purchase foreign currency forward contracts as hedges of forecasted expenses that are denominated in foreign currencies. These contracts are entered into to help protect against the risk that the eventual dollar-net-cash outflows resulting from foreign currency operating and cost of sales expenses will be adversely affected by changes in exchange rates. We designate foreign currency forward and purchased option contracts as cash flow hedges of forecasted net sales or forecasted expenses. In addition, we hedge our foreign currency denominated balance sheet exposures using foreign currency forward contracts that are not designated as hedging instruments. None of our derivative instruments contain a credit-risk-related contingent feature. Cash flow hedges  To help protect against the reduction in value caused by a fluctuation in foreign currency exchange rates of forecasted foreign currency cash flows resulting from international sales over the next one to three years, we have instituted a foreign currency cash flow hedging program. We hedge portions of our forecasted net sales and forecasted expenses denominated in foreign currencies with forward and purchased option contracts. For forward contracts, when the dollar strengthens significantly against the foreign currencies, the change in the present value of future foreign currency cash flows may be offset by the change in the fair value of the forward contracts designated as hedges. For option contracts, when the dollar strengthens significantly against the foreign currencies, the change in the present value of future foreign currency cash flows may be offset by the change in the fair value of the option contracts net of the premium paid designated as hedges. Our foreign currency purchased option contracts are purchased “at-the-money” or “out-of-the-money.” We purchase foreign currency forward and option contracts for up to 100 % of our forecasted exposures in selected currencies (primarily in Euro, Japanese yen, Hungarian forint, British pound, Malaysian ringgit and Chinese yuan ) and limit the duration of these contracts to 40 months or less.  For derivative instruments that are designated and qualify as a cash flow hedge, the effective portion of the gain or loss on the derivative is reported as a component of accumulated other comprehensive income (“OCI”) and reclassified into earnings in the same line item (net sales, operating expenses, or cost of sales) associated with the forecasted transaction and in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings or expenses during the current period and are classified as a component of “ net foreign exchange gain (l oss ) .” Hedge effectiveness of foreign currency forwards and purchased option contracts designated as cash flow hedges are measured by comparing the hedging instrument’s cumulative change in fair value from inception to maturity to the forecasted transaction’s terminal value.  We held forward contracts with the following notional amounts:    (In thousands) US Dollar Equivalent  As of June 30, 2017 As of December 31,  (Unaudited) 2016  Chinese yuan $ 41,860 $ 27,414  Euro 137,059 123,522  Japanese yen 30,334 44,982  Hungarian forint 55,671 57,077  Malaysian ringgit 36,513 42,510  Total forward contracts notional amount $ 301,437 $ 295,505 The contracts in the foregoing table had contractual maturities of 36 months or less at June 30, 2017 and December 31, 2016 . At June 30, 2017, we expect to reclassify $0.7 million of losses on derivative instruments from accumulated OCI to net sales during the next twelve months when the hedged international sales occur, $0.3 million of losses on derivative instruments from accumulated OCI to cost of sales during the next twelve months when the cost of sales are incurred and $0.3 million of losses on derivative instruments from accumulated OCI to operating expenses during the next twelve months when the hedged operating expenses occur. Expected amounts are based on derivative valuations at June 30, 2017 . Actual results may vary materially as a result of changes in the corresponding exchange rates subsequent to this date. The gains and losses recognized in earnings due to hedge ineffectiveness were not material for each of the six month periods ended June 30, 2017 and 2016 and are included as a component of net income under the line item “ net foreign exchange gain (loss).”  Other Derivatives Other derivatives not designated as hedging instruments consist primarily of foreign currency forward contracts that we use to hedge our foreign denominated net receivable or net payable positions to help protect against the change in value caused by a fluctuation in foreign currency exchange rates . We typically attempt to hedge up to 90 % of our outstanding foreign denominated net receivables or net payables and typically limit the duration of these foreign currency forward contracts to approximately 120 days or less. The gain or loss on the derivatives as well as the offsetting gain or loss on the hedge item attributable to the hedged risk is recognized in current earnings under the line item “ net foreign exchange gain (loss).” As of June 30, 2017 and December 31, 2016 , we held foreign currency forward contracts with a notional amount of $ 46 million and $ 60 million, respectively. The following tables present the fair value of derivative instruments on our Consolidated Balance Sheets at June 30, 201 7 and December 31, 2016 , respectively.    Asset Derivatives  June 30, 2017 December 31, 2016  (In thousands) (Unaudited)   Balance Sheet Location Fair Value Balance Sheet Location Fair Value  Derivatives designated as hedging instruments  Foreign exchange contracts - ST forwards Prepaid expenses and other current assets $ 3,014 $ 9,378   Foreign exchange contracts - LT forwards Other long-term assets 2,427 3,866  Total derivatives designated as hedging instruments $ 5,441 $ 13,244   Derivatives not designated as hedging instruments   Foreign exchange contracts - ST forwards Prepaid expenses and other current assets $ 224 $ 1,869  Total derivatives not designated as hedging instruments $ 224 $ 1,869   Total derivatives $ 5,665 $ 15,113      Liability Derivatives  June 30, 2017 December 31, 2016  (In thousands) (Unaudited)   Balance Sheet Location Fair Value Balance Sheet Location Fair Value  Derivatives designated as hedging instruments  Foreign exchange contracts - ST forwards Accrued expenses and other liabilities $ (4,343) $ (4,672)   Foreign exchange contracts - LT forwards Other long-term liabilities (2,304) (3,352)  Total derivatives designated as hedging instruments $ (6,647) $ (8,024)   Derivatives not designated as hedging instruments   Foreign exchange contracts - ST forwards Accrued expenses and other liabilities $ (724) $ (175)  Total derivatives not designated as hedging instruments $ (724) $ (175)   Total derivatives $ (7,371) $ (8,199)  The following tables present the effect of derivative instruments on our Consolidated Statements of Income for three month periods ended June 30, 2017 and 2016 , respectively:     June 30, 2017  (In thousands)  (Unaudited)  Derivatives in Cash Flow Hedging Relationship Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion) Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)  Foreign exchange contracts - forwards and options $ (9,488) Net sales $ 669 Net foreign exchange gain/(loss) $ -   Foreign exchange contracts - forwards and options 3,171 Cost of sales (428) Net foreign exchange gain/(loss) -   Foreign exchange contracts - forwards and options 2,795 Operating expenses (416) Net foreign exchange gain/(loss) -  Total $ (3,522) $ (175) $ -      June 30, 2016  (In thousands)  (Unaudited)  Derivatives in Cash Flow Hedging Relationship Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion) Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)  Foreign exchange contracts - forwards and options $ 2,764 Net sales $ (904) Net foreign exchange gain/(loss) $ -   Foreign exchange contracts - forwards and options (1,442) Cost of sales (382) Net foreign exchange gain/(loss) -   Foreign exchange contracts - forwards and options (1,184) Operating expenses (360) Net foreign exchange gain/(loss) -  Total $ 138 $ (1,646) $ -     (In thousands)  Derivatives not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income Amount of Gain (Loss) Recognized in Income Amount of Gain (Loss) Recognized in Income  June 30, 2017 June 30, 2016  (Unaudited) (Unaudited)  Foreign exchange contracts - forwards Net foreign exchange gain/(loss) $ (632) 2,063   Total $ (632) $ 2,063 The following tables present the effect of derivative instruments on our Consolidated Statements of Income for the six month periods ended June 30, 2017 and 2016 , respectively:     June 30, 2017  (In thousands)  (Unaudited)  Derivatives in Cash Flow Hedging Relationship Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion) Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)  Foreign exchange contracts - forwards and options $ (14,797) Net sales $ 2,749 Net foreign exchange gain/(loss) $ -   Foreign exchange contracts - forwards and options 4,480 Cost of sales (978) Net foreign exchange gain/(loss) -   Foreign exchange contracts - forwards and options 3,983 Operating expenses (979) Net foreign exchange gain/(loss) -  Total $ (6,334) $ 792 $ -      June 30, 2016  (In thousands)  (Unaudited)  Derivatives in Cash Flow Hedging Relationship Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion) Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)  Foreign exchange contracts - forwards and options $ (276) Net sales $ (1,141) Net foreign exchange gain/(loss) $ -   Foreign exchange contracts - forwards and options 1,597 Cost of sales (953) Net foreign exchange gain/(loss) -   Foreign exchange contracts - forwards and options 2,244 Operating expenses (889) Net foreign exchange gain/(loss) -  Total $ 3,565 $ (2,983) $ -      (In thousands)  Derivatives not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income Amount of Gain (Loss) Recognized in Income Amount of Gain (Loss) Recognized in Income  June 30, 2017 June 30, 2016  (Unaudited) (Unaudited)  Foreign exchange contracts - forwards Net foreign exchange gain/(loss) $ (3,178) (191)   Total $ (3,178) $ (191) 

Inventories, Net

Inventories, Net	6 Months Ended
	Jun. 30, 2017
Inventories, Net [Abstract]
Inventories, Net	Note 6 – Inventories, net Inventories, net consist of the following:    June 30, 2017 December 31,  (In thousands) (Unaudited) 2016   Raw materials $ 93,345 $ 92,906  Work-in-process 7,805 9,125  Finished goods 85,005 91,577  $ 186,155 $ 193,608 

Intangible Assets, Net

Intangible Assets, Net	6 Months Ended
	Jun. 30, 2017
Intangible Assets, Net [Abstract]
Intangible Assets, Net	Note 7 – Intangible assets, net Intangible assets at June 30, 2017 and December 31, 2016 are as follows:     June 30, 2017  (In thousands) (Unaudited) December 31, 2016  Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount  Capitalized software development costs $ 110,565 $ (30,911) $ 79,654 $ 103,887 $ (39,180) $ 64,707  Acquired technology 95,443 (83,578) 11,865 94,124 (79,485) 14,639  Patents 32,497 (18,872) 13,625 31,513 (17,573) 13,940  Other 44,484 (29,301) 15,183 42,848 (27,471) 15,377  $ 282,989 $ (162,662) $ 120,327 $ 272,372 $ (163,709) $ 108,663 Software development costs capitalized for the three month periods ended June 30, 2017 and 2016 were $ 13.7 million and $7.6 million, respectively, and related amortization expense was $5.5 million and $4.3 million, respectively. For the six month periods ended June 30, 2017 and 2016, capitalized software development costs were $26 million and $16 million, respectively, and related amortization expense was $10.8 million and $8.6 million, respectively. Capitalized software development costs for the three month periods ended June 30, 2017 and 2016 included costs related to stock based compensation of $528,000 and $ 200,000 , respectively. For the six month periods ended June 30, 2017 and 2016, capitalized software development costs included costs related to stock based compensation of $954,000 and $525,000 respectively. The related amounts in the table above are net of fully amortized assets.  Amortization of capitalized software development costs is computed on an individual product basis for those products available for market and is recognized based on the product’s estimated economic life, generally three to six years. Acquired technology and other intangible assets are amortized over their useful lives, which range from three to eight years. Patents are amortized using the straight-line method over their estimated period of benefit, generally 10 to 17 years. Total intangible assets amortization expenses were $8.6 million and $ 9.2 million for the three months ended June 30, 2017 and 2016 , respectively, and $17.0 million and $18.5 million for the six month periods ended June 30, 2017 and 2016, respectively.

Goodwill

Goodwill	6 Months Ended
	Jun. 30, 2017
Goodwill [Abstract]
Goodwill	Note 8 – Goodwill The carrying amount of goodwill as of June 30, 2017 , was as follows:    Amount  (In thousands)  Balance as of December 31, 2016 $ 253,197  Acquisitions -  Foreign currency translation impact 8,214  Balance as of June 30, 2017 (unaudited) $ 261,411   The excess purchase price over the fair value of assets acquired is recorded as goodwill. As we have one operating segment comprised of components with similar economic characteristics, we allocate goodwill to one reporting unit for goodwill impairment testing. Goodwill is tested for impairment on an annual basis, and between annual tests if indicators of potential impairment exist, using a fair-value-based approach based on the market capitalization of the reporting unit. Our annual impairment test was performed as of February 28, 201 7 . No impairment of goodwill was identified during 201 7 or 2016 .

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2017
Income Taxes [Abstract]
Income Taxes	Note 9 – Income taxes We account for income taxes under the asset and liability method. Deferred tax assets and liabilities are recognized for the expected tax consequences of temporary differences between the tax bases of assets and liabilities and their reported amounts. Valuation allowances are established when necessary to reduce deferred tax assets to amounts which are more likely than not to b e realized. We had a valuation allowance of $62 million at June 30, 2017 and December 31, 2016, and $102 million at December 31, 2015. A majority of the valuation allowance is related to the deferred tax assets of National Instruments Hungary Kft. (“NI Hungary”). The decrease in the valuation allowance from 2015 to 2016 was primarily due to the revaluation of NI Hungary’s gross deferred tax assets following the reduction in the Hungarian corporate income tax rate from 19% to 9% . We account for uncertainty in income taxes recognized in our financial statements using prescribed recognition thresholds and measurement attributes for financial statement disclosure of tax positions taken or expected to be taken on our tax returns. We had $12.4 million and $ 11.7 million unrecognized tax benefits at June 30, 2017 and December 31, 2016, respectively, all of which would affect our effective income tax rate if recognized. We recorded a gross increase in unrecognized tax benefits of $0.3 million and $0.5 million for the three and six month periods ended June 30, 2017, respectively, as a result of the tax positions taken during these periods. As of June 30, 2017, it is reasonably possible that we will recognize tax benefits in the amount of $ 3.7 million in the next twelve months due to the closing of open tax years. The nature of the uncertainty is related to deductions taken on returns that have not been examined by the applicable tax authority. Our continuing policy is to recognize interest and penalties related to income tax matters in income tax expense. As of June 30, 2017, we had approximately $ 1.4 million accrued for interest related to uncertain tax positions. The tax years 2008 through 2017 remain open to examination by the major taxing jurisdictions to which we are subject. Our provision for income taxes reflected an effective tax rate of 14% and 25% for the three month periods ended June 30, 2017 and 2016 , respectively, and 18% and 25% for the six month periods ended June 30, 2017 and 2016, respectively. For the three and six month periods ended June 30, 2017 , our effective tax rate was lower than the U.S. federal statutory rate of 35 % as a result of an enhanced deduction for certain research and development expenses, profits in foreign jurisdictions with reduced income tax rates, the research and development tax credit, a tax benefit from disqualifying dispositions of equity awards that do not ord inarily result in a tax benefit, and excess tax benefits from share-based compensation. For the three and six month periods ended June 30, 2016, our effective tax rate was lower than the U. S. federal statutory rate of 35 % as a result of an enhanced deduction for certain research and development expenses, profits in foreign jurisdictions with reduced income tax rates, the research and development tax credit, and a tax benefit from disqualifying dispositions of equity awards that do not ordinarily result in a tax benefit.  Our earnings in Hungary are subject to a statutory tax rate of 9 %. In addition, our research and de velopment activities in Hungary benefit from a tax law in Hungary that provides for an enhanced deduction for qualified research and development expenses. The tax position of our Hungarian operations resulted in income tax benefits of $4.4 million and $3.9 million for the three month periods ended June 30 , 2017 and 2016 , respectively, and $7.3 million and $5.8 million for the six month periods ended June 30, 2017 and 2016, respectively.  Earnings from our operations in Malaysia are free of tax under a tax holiday effective January 1, 2013. This tax holiday expires in 2027. If we fail to satisfy the conditions of the tax holiday, this tax benefit may be terminated early . The income tax benefits of the tax holiday for the three and six month periods ended June 30, 2017 were approximately $0.6 and $1.1 million, respectively. The impact of the tax holiday on a per share basis for each of the three and six months ended June 30, 2017 was a benefit of $0.01 per share. The income tax benefits of the tax holiday for the three and six month periods ended June 30, 2016 were approximately $0.7 million and $1.1 million, respectively. The impact of the tax holiday on a per share basis for each of the three and six months ended June 30, 2016 was a benefit of $0.01 per share.  No other taxing jurisdictions had a significant impact on our effective tax rate. We have not entered into any advanced pricing or other agreements with the IRS with regard to any foreign jurisdictions . 

Comprehensive Income

Comprehensive Income	6 Months Ended
	Jun. 30, 2017
Comprehensive Income [Abstract]
Comprehensive Income	 Note 10 – Comprehensive income  Our comprehensive income is comprised of net income, foreign currency translation, unrealized gains and losses on forward and option contracts and securities classified as available-for-sale. The accumulated OCI, net of tax, for the six month periods ended June 30, 2017 and 2016 , consisted of the following:    June 30, 2017  (Unaudited)  (In thousands) Currency translation adjustment Investments Derivative instruments Accumulated other comprehensive income/(loss)  Balance as of December 31, 2016 $ (37,174) $ (669) 3,222 $ (34,621)  Current-period other comprehensive income 15,664 26 (5,542) 10,148  Reclassified from accumulated OCI into income - - (792) (792)  Income tax (benefit) expense 120 (17) (2,249) (2,146)  Balance as of June 30, 2017 $ (21,630) $ (626) $ (863) $ (23,119)    June 30, 2016  (Unaudited)  (In thousands) Currency translation adjustment Investments Derivative instruments Accumulated other comprehensive income/(loss)  Balance as of December 31, 2015 $ (31,871) $ (857) (5,362) $ (38,090)  Current-period other comprehensive (loss) income 8,166 549 582 9,297  Reclassified from accumulated OCI into income - - 2,983 2,983  Income tax (benefit) expense 1,944 134 1,197 3,275  Balance as of June 30, 2016 $ (25,649) $ (442) $ (2,994) $ (29,085) 

Authorized Shares Of Common And

Authorized Shares Of Common And Preferred Stock And Stock-Based Compensation Plans	6 Months Ended
	Jun. 30, 2017
Authorized Shares Of Common And Preferred Stock And Stock-Based Compensation Plans [Abstract]
Authorized Shares Of Common And Preferred Stock And Stock-Based Compensation Plans	Note 11 – Authorized shares of common and preferred stock and stock-based compensation plans Authorized shares of common and preferred stock  Following approval by the Company’s Board of Directors and stockholders, on May 14, 2013, the Company’s certificate of incorporation was amended to increase the authorized shares of common stock by 180,000,000 shares to a total of 360,000,000 shares. As a result of this amendment, the total number of shares which the Company is authorized to issue is 365,000,000 shares, consisting of (i) 5,000,000 shares of preferred stock, par value $.01 per share, and (ii) 360,000,000 shares of common stock, par value $.01 per share.  Restricted stock plan  Our stockholders approved our 2005 Incentive Plan (the “2005 Plan”) in May 2005. At the time of approval, 4,050,000 shares of our common stock were reserved for issuance under this plan, as well as the number of shares which had been reserved but not issued under our 1994 Incentive Plan which terminated in May 2005 (the “1994 Plan” ), and any shares that returned to the 1994 Plan as a result of termination of options or repurchase of shares issued under such plan. The 2005 Plan, administered by the Compensation Committee of the Board of Directors, provided for granting of incentive awards in the form of restricted stock and RSUs to directors, executive officers and employees of the Company and its subsidiaries. Awards vest over a three , five or ten -year period, beginning on the date of grant. Vesting of ten year awards may accelerate based on the Company’s previous year’s earnings and growth but ten year awards cannot accelerate to vest over a period of less than five years. The 2005 Plan terminated on May 11, 2010, except with respect to outstanding awards previously granted thereunder. There were 3,362,304 shares of common stock that were reserved but not issued under the 2005 Plan as of May 11, 2010. Our stockholders approved our 2010 Incentive Plan (the “2010 Plan”) on May 11, 2010. At the time of approval, 3,000,000 shares of our common stock were reserved for issuance under this plan, as well as the 3,362,304 shares of common stock that were reserved but not issued under the 1994 Plan and the 2005 Plan as of May 11, 2010, and any shares that are returned to the 1994 Plan and the 2005 Plan as a result of the forfeiture or termination of options or RSUs or repurchase of shares issued under these plans. The 2010 Plan, administered by the Compensation Committee of the Board of Directors, provides for granting of incentive awards in the form of restricted stock and RSUs to employees, directors and consultants of the Company and employees and consultants of any parent or subsidiary of the Company. Awards vest over a three , five or ten -year period, beginning on the date of grant. Vesting of ten year awards may accelerate based on the Company’s previous year’s earnings and growth but ten year awards cannot accelerate to vest over a period of l ess than five years. The 2010 Plan terminated on May 12, 2015, except with respect to the outstanding awards previously granted thereunder. There were 2,518,416 shares of common stock that were reserved but not issued under the 2010 Plan as of May 12, 2015.  Our stockholders approved our 2015 Equity Incentive Plan (the “2015 Plan”) on May 12, 2015. At the time of approval, 3,000,000 shares of our common stock were reserved for issuance under this plan, as well as the 2,518,416 shares of common stock that were reserved but not issued under the 2010 Plan as of May 12, 2015, and any shares that were returned to the 1994, 2005, and the 2010 Plans as a result of the forfeiture or termination of options or RSUs or repurchase of shares issued under these plans. The 2015 Plan, administered by the Compensation Committee of the Board of Directors, provides for the granting of incentive awards in the form of restricted stock and RSUs to employees, directors and consultants of the Company and employees and consultants of any parent or subsidiary of the Company. Awards vest over a three , four , five or ten -year period, beginning on the date of grant. Vesting of ten year awards may accelerate based on the Company’s previous year’s earnings and growth but ten year awards cannot accelerate to vest over a period of l ess than five years. There were 3,848,687 shares available for grant under the 2015 Plan at June 30, 2017. During the three month period ended June 30, 2017 , we did not make any changes in accounting principles or methods of estimates related to the 2005, 2010 and 2015 Plans. Employee stock purchase plan  Our employee stock purchase plan permits substantially all domestic employees and employees of designated subsidiaries to acquire our common stock at a purchase price of 85 % of the lower of the market price at the beginning or the end of the purchase period. The plan has quarterly purchase periods generally beginning on February 1, May 1, August 1 and November 1 of each year. Employees may designate up to 15 % of their compensation for the purchase of common stock under this plan. On May 9, 2017, our stockholders approved an additional 3,000,000 shares for issuance under our employee stock purchase plan. At June 30, 2017, we had 3,321,448 shares of common stock reserved for future issuance under this plan. We issued 611,603 shares under this plan in the six month period ended June 30, 2017 and the weighted average purchase price of the employees’ purchase rights was $ 25.19 per share. During the six month period ended June 30, 2017 , we did not make any changes in accounting principles or methods of estimates with respect to such plan.  Authorized Preferred Stock and Preferred Stock Purchase Rights Plan We have 5,000,000 authorized shares of preferred stock . On January 21, 2004, our Board of Directors designated 750,000 of these shares as Series A Participating Preferred Stock in conjunction with the adoption of a Preferred Stock Rights Agreement which expired on May 10, 2014. There were no shares of preferred stock issued and outstanding at June 30, 2017.  Stock repurchases and retirements From time to time, our Board of Directors has authorized various programs for our repurchase of shares of our common stock depending on market conditions and other factors. Under the current program, we did not make any share repurchases during the six month period ended June 30, 2017. We repurchased a total of 35,990 shares of our common stock at a weighted average price per share of $27.59 during the three month period ended June 30, 2016. We repurchased a total of 206,780 shares of our common stock at a weighted average price per share of $27.25 during the six month period ended June 30, 2016. At June 30, 2017, there were 1,134,247 shares remaining available for repurchase under this program. This repurchase program does not have an expiration date.  

Segment And Geographic Informat

Segment And Geographic Information	6 Months Ended
	Jun. 30, 2017
Segment And Geographic Information [Abstract]
Segment And Geographic Information	    Note 12 – Segment and geographic information We operate as one operating segment. Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker, who is our chief executive officer, in deciding how to allocate resources and in assessing performance. Our chief operating decision maker evaluates our financial information and resources and assesses the performance of these resources on a consolidated basis. Since we operate in one operating segment, all required financial segment information can be found in the condensed consolidated financial statements and the notes thereto. We sell our product in three geographic regions which consist of Americas; Europe, Middle East, India, and Africa (EMEIA); and Asia-Pacific (APAC). Our sales to these regions share similar economic characteristics, similar product mix, similar customers, and similar distribution methods. Revenue from the sale of our products, which are similar in nature, and software maintenance is reflected as total net sales in our Consolidated Statements of Income.  Total net sales by the major geographic areas in which we operate, are as follows:   Three Months Ended June 30, Six Months Ended June 30,  (In thousands) (Unaudited) (Unaudited)  2017 2016 2017 2016  Net sales:  Americas $ 121,648 $ 114,243 $ 240,087 $ 225,095  EMEIA 100,549 94,533 195,288 186,384  APAC 96,412 97,329 183,339 181,803  $ 318,609 $ 306,105 $ 618,714 $ 593,282   Based on the billing location of the customer, total sales outside the U.S. for the three month periods ended June 30, 2017 and 2016 were $ 204 million and $ 198 million, respectively, and $393 million and $381 million for the six month periods ended June 30, 2017 and 2016, respectively.  Total property and equipment, net, outside the U.S. was $133 million as of June 30, 2017 and December 31, 2016.

Debt

Debt	6 Months Ended
	Jun. 30, 2017
Debt [Abstract]
Debt	Note 13 - Debt  On May 9, 2013, we entered into a Loan Agreement (the “Loan Agreement”) with Wells Fargo Bank (the “Lender”). The Loan Agreement provided for a $50 million unsecured revolving line of credit with a scheduled maturity date of May 9, 2018 (the “Maturity Date”). On October 29, 2015, we entered into a First Amendment to Loan Agreement (the “Amendment”) with the Lender, which amended our Loan Agreement to among other things, (i) increase the unsecured revolving line of credit from $50.0 million to $125.0 million, (ii) extend the Maturity Date of the line of credit from May 9, 2018 to October 29, 2020, and (iii) provide us with an option to request increases to the line of credit of up to an additional $25.0 million in the aggregate, subject to consent of the Lender and terms and conditions to be mutually agreed between us and the Lender. The loans bear interest, at our option, at a base rate determined in accordance with the Loan Agreement, plus a spread of 0.0% to 0.5% , or a LIBOR rate plus a spread of 1.125% to 2.0% , in each case with such spread determined based on a ratio of consolidated indebtedness to EBITDA, determined in accordance with the Loan Agreement. Principal, together with all accrued and unpaid interest, is due and payable on the Maturity Date. We are also obligated to pay a quarterly commitment fee, payable in arrears, based on the available commitments at a rate of 0.175% to 0.300% , with such rate determined based on the ratio described above. The Loan Agreement contains customary affirmative and negative covenants. The affirmative covenants include, among other things, delivery of financial statements, compliance certificates and notices; payment of taxes and other obligations; maintenance of existence; maintenance of properties and insurance; and compliance with applicable laws and regulations. The negative covenants include, among other things, limitations on indebtedness, liens, mergers, consolidations, acquisitions and sales of assets, investments, changes in the nature of the business, affiliate transactions and certain restricted payments. The Loan Agreement also requires us to maintain a ratio of consolidated indebtedness to EBITDA equal to or less than 3.25 to 1.00, and a ratio of consolidated EBITDA to interest expense greater than or equal to 3.00 to 1.00, in each case determined in accordance with the Loan Agreement. As of June 30, 2017, we were in compliance with all covenants in the Loan Agreement.  The Loan Agreement contains customary events of default including, among other things, payment defaults, breaches of covenants or representations and warranties, cross-defaults with certain other indebtedness, bankruptcy and insolvency events, judgment defaults and change in control events, subject to grace periods in certain instances. Upon an event of default, the lender may declare all or a portion of the outstanding obligations payable by us to be immediately due and payable and exercise other rights and remedies provided for under the Loan Agreement. Under certain circumstances, a default interest rate will apply on all obligations during the existence of an event of default under the Loan Agreement at a per annum rate of interest equal to 2.00% above the otherwise applicable interest rate. Proceeds of loans made under the Loan Agreement may be used for working capital and other general corporate purposes. We may prepay the loans under the Loan Agreement in whole or in part at any time without premium or penalty. Certain of our existing and future material domestic subsidiaries are required to guaranty our obligations under the Loan Agreement.  As of June 30, 2017, we had outstanding $ 25 million in borrowings under this line of credit. During the three month periods ended June 30, 2017 and June 30, 2016, we incurred interest expense related to our outstanding borrowings of $ 1 79 ,000 and $1 62 ,000 , respectively. During the six month periods ended June 30, 2017 and June 30, 2016, we incurred interest expense related to our outstanding borrowings of $ 343 ,000 and $ 3 4 3 ,000 , respectively. As of June 30, 2017 and June 30, 2016, the weighted-average interest rate on the revolving line of credit was 2.3% and 1.6% , respectively . These charges are included in “Other income (loss), net” in our Consolidated Statements of Income .

Commitments And Contingencies

Commitments And Contingencies	6 Months Ended
	Jun. 30, 2017
Commitments And Contingencies [Abstract]
Commitments And Contingencies	Note 14 – Commitments and contingencies We offer a one -year limited warranty on most hardware products which is included in the terms of sale of such products. We also offer optional extended warranties on our hardware products for which the related revenue is recognized ratably over the warranty period. Provision is made for estimated future warranty costs at the time of the sale for the estimated costs that may be incurred under the standard warranty. Our estimate is based on historical experience and product sales during the period. The warranty reserve for the six month periods ended June 30, 2017 and 2016 was as follows:    Six Months Ended June 30,  (In thousands) (Unaudited)  2017 2016  Balance at the beginning of the period $ 2,686 $ 1,755  Accruals for warranties issued during the period 1,288 1,097  Accruals related to pre-existing warranties 161 291  Settlements made (in cash or in kind) during the period (1,330) (1,376)  Balance at the end of the period $ 2,805 $ 1,767 As of June 30, 2017 , we had non-cancelable purchase commitments with various suppliers of customized inventory and inventory components totaling approximately $ 7.1 million over the next twelve months.  As of June 30, 2017, we had outstanding guarantees for payment of customs and foreign grants totaling approximately $ 3.0 million, which are generally payable over the next twelve months.

Restructuring

Restructuring	6 Months Ended
	Jun. 30, 2017
Restructuring [Abstract]
Restructuring	Note 15 – Restructuring We are taking steps to reduce our overall employee headcount by approximately 2% by the end of 2017 in an effort to minimize job duplication or evaluate where we should shift and centralize activities, improve efficiencies, and rebalance our resources on higher return activities. The timing and scope of our headcount reductions will vary. A summary of the charges in the consolidated statement of operations resulting from our restructuring activities is shown below:   Three Months Ended June 30, Six Months Ended June 30,  (In thousands) (Unaudited) (Unaudited)  2017 2016 2017 2016  Cost of sales $ 574 - $ 907 -  Research and development 1,042 - 1,296 -  Sales and marketing 4,024 - 6,379 -  General and Administration 419 - 594 -  Total restructuring and other related costs $ 6,059 - $ 9,176 -  A summary of balance sheet activity related to the restructuring activity is shown below:    Restructuring Liability  (in thousands)  Balance as of December 31, 2016 $ -  Income statement expense 9,176  Cash payments (4,856)  Balance as of June 30, 2017 $ 4,320  The restructuring liability of $4.3 million at June 30, 2017 relating to the restructuring activity is recorded in the “accounts payable” line item of the consolidated balance sheet.

Litigation

Litigation	6 Months Ended
	Jun. 30, 2017
Litigation [Abstract]
Litigation	Note 16 – Litigation We are not currently a party to any material litigation. However, in the ordinary course of our business, we are involved in a limited number of legal actions, both as plaintiff and defendant, and could incur uninsured liability in any one or more of them. We also periodically receive notifications from various third parties related to alleged infringement of patents or intellectual property rights, commercial disputes or other matters. No assurances can be given with respect to the extent or outcome of any future litigation or dispute.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2017
Subsequent Events [Abstract]
Subsequent Events	Note 17 – Subsequent events On July 2 6 , 2017 , our Board of Directors declared a quarterly cash dividend of $0.21 per common share, payable on September 5, 2017 , to stockholders of record on August 14, 2017 .

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Reconciliation Of The Denominators Used To Calculate Basic EPS And Diluted EPS	   Three Months Ended June 30, Six Months Ended June 30,  (In thousands) (In thousands)  (Unaudited) (Unaudited)  2017 2016 2017 2016  Weighted average shares outstanding-basic 130,197 128,282 129,820 127,938  Plus: Common share equivalents  RSUs 920 464 799 491  Weighted average shares outstanding-diluted 131,117 128,746 130,619 128,429 

Short-Term Investments (Tables)

Short-Term Investments (Tables)	6 Months Ended
	Jun. 30, 2017
Short-Term Investments [Abstract]
Unrealized Gains And Losses Related To Cash, Cash Equivalents, And Short-Term Investments Designated As Available-For-Sale	   As of June 30, 2017  (In thousands) (Unaudited)  Gross Gross Cumulative  Adjusted Cost Unrealized Gain Unrealized Loss Translation Adjustment Fair Value  Corporate bonds 92,561 78 (145) (1,466) 91,028  U.S. treasuries and agencies 12,496 - - - 12,496  Time deposits 1,760 - - - 1,760  Short-term investments $ 106,817 $ 78 $ (145) $ (1,466) $ 105,284     (In thousands) December 31, 2016  Gross Gross Cumulative  Adjusted Cost Unrealized Gain Unrealized Loss Translation Adjustment Fair Value  Corporate bonds 72,986 89 (182) (1,536) 71,357  Time deposits 1,760 - - - 1,760  Short-term investments $ 74,746 $ 89 $ (182) $ (1,536) $ 73,117
Contractual Maturities Of Short-Term Investments Designated As Available-For-Sale	   As of June 30, 2017  (In thousands) (Unaudited)  Adjusted Cost Fair Value  Due in less than 1 year $ 29,189 $ 29,180  Due in 1 to 5 years 77,628 76,104  Total available-for-sale debt securities $ 106,817 $ 105,284   Due in less than 1 year Adjusted Cost Fair Value  Corporate bonds $ 14,933 $ 14,924  U.S. treasuries and agencies 12,496 12,496  Time deposits 1,760 1,760  Total available-for-sale debt securities $ 29,189 $ 29,180   Due in 1 to 5 years Adjusted Cost Fair Value  Corporate bonds $ 77,628 $ 76,104  Total available-for-sale debt securities $ 77,628 $ 76,104 

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2017
Fair Value Measurements [Abstract]
Assets And Liabilities Measured On Recurring Basis	   Fair Value Measurements at Reporting Date Using  (In thousands) (Unaudited)  Description June 30, 2017 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  Assets  Cash and cash equivalents available for sale:  Money Market Funds $ 15,951 $ 15,951 $ - $ -  U.S. treasuries and agencies 42,348 - 42,348  Short-term investments available for sale:  Corporate bonds 91,028 - 91,028 -  U.S. treasuries and agencies 12,496 - 12,496  Time deposits 1,760 1,760 - -  Derivatives 5,665 - 5,665 -  Total Assets $ 169,248 $ 17,711 $ 151,537 $ -   Liabilities  Derivatives $ (7,371) $ - $ (7,371) $ -  Total Liabilities $ (7,371) $ - $ (7,371) $ -    (In thousands) Fair Value Measurements at Reporting Date Using  Description December 31, 2016 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3)  Assets  Cash and cash equivalents available for sale:  Money Market Funds $ 68,577 $ 68,577 $ - $ -  Short-term investments available for sale:  Corporate bonds 71,357 - 71,357 -  Time deposits 1,760 1,760 - -  Derivatives 15,113 - 15,113 -  Total Assets $ 156,807 $ 70,337 $ 86,470 $ -   Liabilities  Derivatives $ (8,199) $ - $ (8,199) $ -  Total Liabilities $ (8,199) $ - $ (8,199) $ - 

Derivative Instruments And He27

Derivative Instruments And Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2017
Derivative Instruments And Hedging Activities [Abstract]
Summary Of Notional Amounts Of Derivative Instruments	   (In thousands) US Dollar Equivalent  As of June 30, 2017 As of December 31,  (Unaudited) 2016  Chinese yuan $ 41,860 $ 27,414  Euro 137,059 123,522  Japanese yen 30,334 44,982  Hungarian forint 55,671 57,077  Malaysian ringgit 36,513 42,510  Total forward contracts notional amount $ 301,437 $ 295,505 
Fair Value Of Derivative Instruments On Consolidated Balance Sheets	   Asset Derivatives  June 30, 2017 December 31, 2016  (In thousands) (Unaudited)   Balance Sheet Location Fair Value Balance Sheet Location Fair Value  Derivatives designated as hedging instruments  Foreign exchange contracts - ST forwards Prepaid expenses and other current assets $ 3,014 $ 9,378   Foreign exchange contracts - LT forwards Other long-term assets 2,427 3,866  Total derivatives designated as hedging instruments $ 5,441 $ 13,244   Derivatives not designated as hedging instruments   Foreign exchange contracts - ST forwards Prepaid expenses and other current assets $ 224 $ 1,869  Total derivatives not designated as hedging instruments $ 224 $ 1,869   Total derivatives $ 5,665 $ 15,113      Liability Derivatives  June 30, 2017 December 31, 2016  (In thousands) (Unaudited)   Balance Sheet Location Fair Value Balance Sheet Location Fair Value  Derivatives designated as hedging instruments  Foreign exchange contracts - ST forwards Accrued expenses and other liabilities $ (4,343) $ (4,672)   Foreign exchange contracts - LT forwards Other long-term liabilities (2,304) (3,352)  Total derivatives designated as hedging instruments $ (6,647) $ (8,024)   Derivatives not designated as hedging instruments   Foreign exchange contracts - ST forwards Accrued expenses and other liabilities $ (724) $ (175)  Total derivatives not designated as hedging instruments $ (724) $ (175)   Total derivatives $ (7,371) $ (8,199) 
Effect Of Derivative Instruments On Consolidated Statements Of Income	The following tables present the effect of derivative instruments on our Consolidated Statements of Income for three month periods ended June 30, 2017 and 2016 , respectively:     June 30, 2017  (In thousands)  (Unaudited)  Derivatives in Cash Flow Hedging Relationship Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion) Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)  Foreign exchange contracts - forwards and options $ (9,488) Net sales $ 669 Net foreign exchange gain/(loss) $ -   Foreign exchange contracts - forwards and options 3,171 Cost of sales (428) Net foreign exchange gain/(loss) -   Foreign exchange contracts - forwards and options 2,795 Operating expenses (416) Net foreign exchange gain/(loss) -  Total $ (3,522) $ (175) $ -      June 30, 2016  (In thousands)  (Unaudited)  Derivatives in Cash Flow Hedging Relationship Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion) Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)  Foreign exchange contracts - forwards and options $ 2,764 Net sales $ (904) Net foreign exchange gain/(loss) $ -   Foreign exchange contracts - forwards and options (1,442) Cost of sales (382) Net foreign exchange gain/(loss) -   Foreign exchange contracts - forwards and options (1,184) Operating expenses (360) Net foreign exchange gain/(loss) -  Total $ 138 $ (1,646) $ -     (In thousands)  Derivatives not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income Amount of Gain (Loss) Recognized in Income Amount of Gain (Loss) Recognized in Income  June 30, 2017 June 30, 2016  (Unaudited) (Unaudited)  Foreign exchange contracts - forwards Net foreign exchange gain/(loss) $ (632) 2,063   Total $ (632) $ 2,063 The following tables present the effect of derivative instruments on our Consolidated Statements of Income for the six month periods ended June 30, 2017 and 2016 , respectively:     June 30, 2017  (In thousands)  (Unaudited)  Derivatives in Cash Flow Hedging Relationship Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion) Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)  Foreign exchange contracts - forwards and options $ (14,797) Net sales $ 2,749 Net foreign exchange gain/(loss) $ -   Foreign exchange contracts - forwards and options 4,480 Cost of sales (978) Net foreign exchange gain/(loss) -   Foreign exchange contracts - forwards and options 3,983 Operating expenses (979) Net foreign exchange gain/(loss) -  Total $ (6,334) $ 792 $ -      June 30, 2016  (In thousands)  (Unaudited)  Derivatives in Cash Flow Hedging Relationship Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion) Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)  Foreign exchange contracts - forwards and options $ (276) Net sales $ (1,141) Net foreign exchange gain/(loss) $ -   Foreign exchange contracts - forwards and options 1,597 Cost of sales (953) Net foreign exchange gain/(loss) -   Foreign exchange contracts - forwards and options 2,244 Operating expenses (889) Net foreign exchange gain/(loss) -  Total $ 3,565 $ (2,983) $ -      (In thousands)  Derivatives not Designated as Hedging Instruments Location of Gain (Loss) Recognized in Income Amount of Gain (Loss) Recognized in Income Amount of Gain (Loss) Recognized in Income  June 30, 2017 June 30, 2016  (Unaudited) (Unaudited)  Foreign exchange contracts - forwards Net foreign exchange gain/(loss) $ (3,178) (191)   Total $ (3,178) $ (191) 

Inventories, Net (Tables)

Inventories, Net (Tables)	6 Months Ended
	Jun. 30, 2017
Inventories, Net [Abstract]
Summary Of Inventories	  June 30, 2017 December 31,  (In thousands) (Unaudited) 2016   Raw materials $ 93,345 $ 92,906  Work-in-process 7,805 9,125  Finished goods 85,005 91,577  $ 186,155 $ 193,608 

Intangible Assets, Net (Tables)

Intangible Assets, Net (Tables)	6 Months Ended
	Jun. 30, 2017
Intangible Assets, Net [Abstract]
Schedule Of Finite-Lived Intangible Assets	   June 30, 2017  (In thousands) (Unaudited) December 31, 2016  Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount  Capitalized software development costs $ 110,565 $ (30,911) $ 79,654 $ 103,887 $ (39,180) $ 64,707  Acquired technology 95,443 (83,578) 11,865 94,124 (79,485) 14,639  Patents 32,497 (18,872) 13,625 31,513 (17,573) 13,940  Other 44,484 (29,301) 15,183 42,848 (27,471) 15,377  $ 282,989 $ (162,662) $ 120,327 $ 272,372 $ (163,709) $ 108,663 

Goodwill (Tables)

Goodwill (Tables)	6 Months Ended
	Jun. 30, 2017
Goodwill [Abstract]
Schedule Of Goodwill	   Amount  (In thousands)  Balance as of December 31, 2016 $ 253,197  Acquisitions -  Foreign currency translation impact 8,214  Balance as of June 30, 2017 (unaudited) $ 261,411 

Comprehensive Income (Tables)

Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2017
Comprehensive Income [Abstract]
Schedule Of Comprehensive Income	   June 30, 2017  (Unaudited)  (In thousands) Currency translation adjustment Investments Derivative instruments Accumulated other comprehensive income/(loss)  Balance as of December 31, 2016 $ (37,174) $ (669) 3,222 $ (34,621)  Current-period other comprehensive income 15,664 26 (5,542) 10,148  Reclassified from accumulated OCI into income - - (792) (792)  Income tax (benefit) expense 120 (17) (2,249) (2,146)  Balance as of June 30, 2017 $ (21,630) $ (626) $ (863) $ (23,119)    June 30, 2016  (Unaudited)  (In thousands) Currency translation adjustment Investments Derivative instruments Accumulated other comprehensive income/(loss)  Balance as of December 31, 2015 $ (31,871) $ (857) (5,362) $ (38,090)  Current-period other comprehensive (loss) income 8,166 549 582 9,297  Reclassified from accumulated OCI into income - - 2,983 2,983  Income tax (benefit) expense 1,944 134 1,197 3,275  Balance as of June 30, 2016 $ (25,649) $ (442) $ (2,994) $ (29,085) 

Segment And Geographic Inform32

Segment And Geographic Information (Tables)	6 Months Ended
	Jun. 30, 2017
Segment And Geographic Information [Abstract]
Net Sales By Major Geographical Areas	  Three Months Ended June 30, Six Months Ended June 30,  (In thousands) (Unaudited) (Unaudited)  2017 2016 2017 2016  Net sales:  Americas $ 121,648 $ 114,243 $ 240,087 $ 225,095  EMEIA 100,549 94,533 195,288 186,384  APAC 96,412 97,329 183,339 181,803  $ 318,609 $ 306,105 $ 618,714 $ 593,282   

Commitments And Contingencies (

Commitments And Contingencies (Tables)	6 Months Ended
	Jun. 30, 2017
Commitments And Contingencies [Abstract]
Schedule Of Warranty Reserve	   Six Months Ended June 30,  (In thousands) (Unaudited)  2017 2016  Balance at the beginning of the period $ 2,686 $ 1,755  Accruals for warranties issued during the period 1,288 1,097  Accruals related to pre-existing warranties 161 291  Settlements made (in cash or in kind) during the period (1,330) (1,376)  Balance at the end of the period $ 2,805 $ 1,767 

Restructuring (Tables)

Restructuring (Tables)	6 Months Ended
	Jun. 30, 2017
Restructuring [Abstract]
Restructuring Related Costs	  Three Months Ended June 30, Six Months Ended June 30,  (In thousands) (Unaudited) (Unaudited)  2017 2016 2017 2016  Cost of sales $ 574 - $ 907 -  Research and development 1,042 - 1,296 -  Sales and marketing 4,024 - 6,379 -  General and Administration 419 - 594 -  Total restructuring and other related costs $ 6,059 - $ 9,176 - 
Restructuring Reserve	  Restructuring Liability  (in thousands)  Balance as of December 31, 2016 $ -  Income statement expense 9,176  Cash payments (4,856)  Balance as of June 30, 2017 $ 4,320 

Basis Of Presentation (Details)

Basis Of Presentation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Effect of exchange rate changes on cash			$ 5,727	$ 3,554
Other assets	$ 28,700		28,700		$ 39,601
Retained earnings	$ 359,088		$ 359,088		$ 376,202
Diluted earnings per share	$ 0.19	$ 0.15	$ 0.33	$ 0.23
Accounting Standards Update 2016-16 [Member]
Deferred tax assets	$ 400		$ 400
Other assets	(6,200)		(6,200)
Retained earnings	$ (5,800)		$ (5,800)
Diluted earnings per share	$ 0.01		$ 0.02

Earnings Per Share (Reconciliat

Earnings Per Share (Reconciliation Of The Denominators Used To Calculate Basic EPS And Diluted EPS) (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Weighted average shares outstanding-basic	130,197,000	128,282,000	129,820,000	127,938,000
Plus: Common share equivalents RSUs	920,000	464,000	799,000	491,000
Weighted average shares outstanding-diluted	131,117,000	128,746,000	130,619,000	128,429,000
Anti-dilutive securities excluded from the computation of diluted EPS	6,800	51,000	13,500	333,000

Short-Term Investments (Unreali

Short-Term Investments (Unrealized Gains And Losses Related To Cash, Cash Equivalents, And Short-Term Investments Designated As Available-For-Sale) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	$ 106,817	$ 74,746
Gross Unrealized Gain	78	89
Gross Unrealized Loss	(145)	(182)
Cumulative Translation Adjustment	(1,466)	(1,536)
Fair Value	105,284	73,117
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	92,561	72,986
Gross Unrealized Gain	78	89
Gross Unrealized Loss	(145)	(182)
Cumulative Translation Adjustment	(1,466)	(1,536)
Fair Value	91,028	71,357
U.S. Treasuries And Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	12,496
Fair Value	12,496
Time Deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost	1,760	1,760
Fair Value	$ 1,760	$ 1,760

Short-Term Investments (Contrac

Short-Term Investments (Contractual Maturities Of Short-Term Investments Designated As Available-For-Sale) (Details) $ in Thousands	Jun. 30, 2017USD ($)
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost, Due in less than 1 year	$ 29,189
Fair Value, Due in less than 1 year	29,180
Adjusted Cost, Due in 1 to 5 years	77,628
Fair Value, Due in 1 to 5 years	76,104
Adjusted Cost, Total	106,817
Fair Value, Total	105,284
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost, Due in less than 1 year	14,933
Fair Value, Due in less than 1 year	14,924
Adjusted Cost, Due in 1 to 5 years	77,628
Fair Value, Due in 1 to 5 years	76,104
U.S. Treasuries And Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost, Due in less than 1 year	12,496
Fair Value, Due in less than 1 year	12,496
Time Deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Adjusted Cost, Due in less than 1 year	1,760
Fair Value, Due in less than 1 year	$ 1,760

Fair Value Measurements (Assets

Fair Value Measurements (Assets And Liabilities Measured On Recurring Basis) (Details) $ in Thousands	Jun. 30, 2017USD ($)item	Dec. 31, 2016USD ($)item
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Total	$ 105,284	$ 73,117
Derivatives	5,665	15,113
Total Assets	169,248	156,807
Derivatives	(7,371)	(8,199)
Total Liabilities	$ (7,371)	$ (8,199)
Number of items measured at fair value on a nonrecurring basis | item	0	0
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	$ 17,711	$ 70,337
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	5,665	15,113
Total Assets	151,537	86,470
Derivatives	(7,371)	(8,199)
Total Liabilities	(7,371)	(8,199)
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents available for sale	15,951	68,577
Money Market Funds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents available for sale	15,951	68,577
Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Total	91,028	71,357
Corporate Bonds [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Total	91,028	71,357
U.S. Treasuries And Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents available for sale	42,348
Fair Value, Total	12,496
U.S. Treasuries And Agencies [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents available for sale	42,348
Fair Value, Total	12,496
Time Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Total	1,760	1,760
Time Deposits [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Total	$ 1,760	$ 1,760

Derivative Instruments And He40

Derivative Instruments And Hedging Activities (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)country	Jun. 30, 2016	Jun. 30, 2017USD ($)country	Jun. 30, 2016	Dec. 31, 2016USD ($)
Derivative [Line Items]
Minimum number of countries for which entity has operations | country	50		50
Percentage of sales outside of the Americas during the period	62.00%	63.00%	61.00%	62.00%
Period of protection against the reduction in value caused by a fluctuation, minimum (in number of years)			1 year
Period of protection against the reduction in value caused by a fluctuation, maximum (in number of years)			3 years
Foreign currency forward contracts notional amount	$ 301,437		$ 301,437		$ 295,505
Cost Of Sales [Member]
Derivative [Line Items]
Gains (losses) expected to be reclassified from AOCI to earnings			(300)
Forward Contracts [Member] | Net Sales [Member]
Derivative [Line Items]
Gains (losses) expected to be reclassified from AOCI to earnings			(700)
Forward Contracts [Member] | Operating Expenses [Member]
Derivative [Line Items]
Gains (losses) expected to be reclassified from AOCI to earnings			(300)
Other Derivatives [Member]
Derivative [Line Items]
Foreign currency forward contracts notional amount	$ 46,000		$ 46,000		$ 60,000
Maximum [Member] | Forward Contracts [Member]
Derivative [Line Items]
Percentage of derivative risk hedged	100.00%		100.00%
Duration of derivative contracts entered into by the entity to hedge risk of loss			40 months
Maximum [Member] | Other Derivatives [Member]
Derivative [Line Items]
Percentage of derivative risk hedged	90.00%		90.00%
Duration of derivative contracts entered into by the entity to hedge risk of loss			120 days

Derivative Instruments And He41

Derivative Instruments And Hedging Activities (Summary Of Notional Amounts Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Derivative [Line Items]
Total forward contracts notional amount	$ 301,437	$ 295,505
Chinese Yuan [Member]
Derivative [Line Items]
Total forward contracts notional amount	41,860	27,414
Euro [Member]
Derivative [Line Items]
Total forward contracts notional amount	137,059	123,522
Japanese Yen [Member]
Derivative [Line Items]
Total forward contracts notional amount	30,334	44,982
Hungarian Forint [Member]
Derivative [Line Items]
Total forward contracts notional amount	55,671	57,077
Malaysian Ringgit [Member]
Derivative [Line Items]
Total forward contracts notional amount	$ 36,513	$ 42,510

Derivative Instruments And He42

Derivative Instruments And Hedging Activities (Fair Value Of Derivative Instruments On Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative assets	$ 5,665	$ 15,113
Derivative liabilities	(7,371)	(8,199)
Derivatives Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	5,441	13,244
Derivative liabilities	(6,647)	(8,024)
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contract - Short-Term [Member] | Prepaid Expenses And Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	3,014	9,378
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contract - Short-Term [Member] | Accrued Expenses And Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	(4,343)	(4,672)
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contracts - Long-Term [Member] | Other Long-Term Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	2,427	3,866
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contracts - Long-Term [Member] | Other Long-Term Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	(2,304)	(3,352)
Derivatives Not Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	224	1,869
Derivative liabilities	(724)	(175)
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange Contract - Short-Term [Member] | Prepaid Expenses And Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	224	1,869
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange Contract - Short-Term [Member] | Accrued Expenses And Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ (724)	$ (175)

Derivative Instruments And He43

Derivative Instruments And Hedging Activities (Effect Of Derivative Instruments On Consolidated Statements Of Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Derivatives Designated As Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	$ (3,522)	$ 138	$ (6,334)	$ 3,565
Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(175)	(1,646)	792	(2,983)
Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contracts - Forwards And Options [Member] | Net Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	(9,488)	2,764	(14,797)	(276)
Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	669	(904)	2,749	(1,141)
Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contracts - Forwards And Options [Member] | Cost Of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	3,171	(1,442)	4,480	1,597
Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(428)	(382)	(978)	(953)
Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contracts - Forwards And Options [Member] | Operating Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)	2,795	(1,184)	3,983	2,244
Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(416)	(360)	(979)	(889)
Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion)
Derivatives Not Designated As Hedging Instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income	(632)	2,063	(3,178)	(191)
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange Contracts - Forwards And Options [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income	$ (632)	$ 2,063	$ (3,178)	$ (191)

Inventories, Net (Summary Of In

Inventories, Net (Summary Of Inventories) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Inventories, Net [Abstract]
Raw materials	$ 93,345	$ 92,906
Work-in-process	7,805	9,125
Finished goods	85,005	91,577
Inventories, net	$ 186,155	$ 193,608

Intangible Assets, Net (Narrati

Intangible Assets, Net (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Finite-Lived Intangible Assets [Line Items]
Total intangible assets amortization expenses	$ 8,600,000	$ 9,200,000	$ 17,000,000	$ 18,500,000
Capitalized Software Development Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Capitalized software development costs	13,700,000	7,600,000	26,000,000	16,000,000
Capitalized computer software amortization	5,500,000	4,300,000	10,800,000	8,600,000
Costs related to stock based compensation	$ 528,000	$ 200,000	$ 954,000	$ 525,000
Minimum [Member] | Capitalized Software Development Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)			3 years
Minimum [Member] | Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)			3 years
Minimum [Member] | Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)			10 years
Maximum [Member] | Capitalized Software Development Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)			6 years
Maximum [Member] | Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)			8 years
Maximum [Member] | Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)			17 years

Intangible Assets, Net (Schedul

Intangible Assets, Net (Schedule Of Finite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 282,989	$ 272,372
Accumulated Amortization	(162,662)	(163,709)
Net Carrying Amount	120,327	108,663
Capitalized Software Development Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	110,565	103,887
Accumulated Amortization	(30,911)	(39,180)
Net Carrying Amount	79,654	64,707
Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	95,443	94,124
Accumulated Amortization	(83,578)	(79,485)
Net Carrying Amount	11,865	14,639
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	32,497	31,513
Accumulated Amortization	(18,872)	(17,573)
Net Carrying Amount	13,625	13,940
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	44,484	42,848
Accumulated Amortization	(29,301)	(27,471)
Net Carrying Amount	$ 15,183	$ 15,377

Goodwill (Narrative) (Details)

Goodwill (Narrative) (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2017USD ($)segment	Dec. 31, 2016USD ($)
Goodwill [Abstract]
Number of operating segments | segment	1
Goodwill impairment | $	$ 0	$ 0

Goodwill (Schedule Of Goodwill)

Goodwill (Schedule Of Goodwill) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017USD ($)
Goodwill [Abstract]
Balance at beginning of period	$ 253,197
Foreign currency translation impact	8,214
Balance at end of period	$ 261,411

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 62		$ 62		$ 102
Effective tax rate	14.00%	25.00%	18.00%	25.00%
U.S. federal statutory rate	35.00%		35.00%
Unrecognized tax benefits	$ 12.4		$ 12.4		$ 11.7
Change in unrecognized tax benefits	0.3		0.5
Accrual for interest related to uncertain tax positions	1.4		1.4
Estimated amount of tax benefits to be recognized in the next fiscal quarter	3.7		$ 3.7
Hungary statutory tax rate			9.00%
Hungary [Member]
Operating Loss Carryforwards [Line Items]
Foreign income tax benefit	4.4	$ 3.9	$ 7.3	$ 5.8
Malaysia [Member]
Operating Loss Carryforwards [Line Items]
Tax holiday, amount	$ 0.6	$ 0.7	$ 1.1	$ 1.1
Tax holiday,amount per share	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Minimum [Member] | Hungary [Member]
Operating Loss Carryforwards [Line Items]
Effective tax rate			9.00%
Maximum [Member] | Hungary [Member]
Operating Loss Carryforwards [Line Items]
Effective tax rate			19.00%

Comprehensive Income (Schedule

Comprehensive Income (Schedule Of Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (34,621)	$ (38,090)
Current-period other comprehensive (loss) income			10,148	9,297
Reclassified from accumulated OCI into income			(792)	2,983
Income tax (benefit) expense	$ (1,186)	$ (1,436)	(2,146)	3,275
Ending Balance	(23,119)	(29,085)	(23,119)	(29,085)
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(37,174)	(31,871)
Current-period other comprehensive (loss) income			15,664	8,166
Income tax (benefit) expense			120	1,944
Ending Balance	(21,630)	(25,649)	(21,630)	(25,649)
Investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(669)	(857)
Current-period other comprehensive (loss) income			26	549
Income tax (benefit) expense			(17)	134
Ending Balance	(626)	(442)	(626)	(442)
Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			3,222	(5,362)
Current-period other comprehensive (loss) income			(5,542)	582
Reclassified from accumulated OCI into income			(792)	2,983
Income tax (benefit) expense			(2,249)	1,197
Ending Balance	$ (863)	$ (2,994)	$ (863)	$ (2,994)

Authorized Shares Of Common A51

Authorized Shares Of Common And Preferred Stock And Stock-Based Compensation Plans (Narrative) (Details)	May 14, 2013shares	Jun. 30, 2016$ / sharesshares	Jun. 30, 2017$ / sharesshares	Jun. 30, 2016$ / sharesshares	May 09, 2017shares	Dec. 31, 2016$ / sharesshares	May 12, 2015shares	May 11, 2010shares	May 10, 2005shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional number of shares reserved for issuance	180,000,000
Common stock, shares authorized	360,000,000		360,000,000			360,000,000
Number of shares reserved for issuance								3,362,304
Common and preferred stock shares authorized			365,000,000
Preferred stock, par value | $ / shares			$ 0.01			$ 0.01
Common stock, par value | $ / shares			$ 0.01			$ 0.01
Preferred stock, shares authorized			5,000,000			5,000,000
Preferred stock, shares issued			0			0
Preferred stock, shares outstanding			0			0
Authorized common stock available for repurchase			1,134,247
Common stock repurchased		35,990		206,780
Weighted average prices of common stock repurchased | $ / shares		27.59		27.25
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized					3,000,000
Percentage of the lower of the market related to purchase of common stock			85.00%
Shares of common stock reserved for future employee purchases			3,321,448
Shares issued during the period, in shares			611,603
Weighted average grant date fair value, in dollar per share | $ / shares			$ 25.19
Employee Stock Purchase Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum employee subscription rate			15.00%
Incentive Plan (2005) [Member] | Restricted Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance									4,050,000
Incentive Plan (2005) [Member] | Restricted Stock Plan [Member] | Vesting Period One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period, (in years)			3 years
Incentive Plan (2005) [Member] | Restricted Stock Plan [Member] | Vesting Period Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period, (in years)			5 years
Incentive Plan (2005) [Member] | Restricted Stock Plan [Member] | Vesting Period Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period, (in years)			10 years
Incentive Plan (2010) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance							2,518,416
Incentive Plan (2010) [Member] | Restricted Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance								3,000,000
Incentive Plan (2010) [Member] | Restricted Stock Plan [Member] | Vesting Period One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period, (in years)			3 years
Incentive Plan (2010) [Member] | Restricted Stock Plan [Member] | Vesting Period Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period, (in years)			5 years
Incentive Plan (2010) [Member] | Restricted Stock Plan [Member] | Vesting Period Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period, (in years)			10 years
Incentive Plan (2015) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance							3,000,000
Number of shares available for grant			3,848,687
Incentive Plan (2015) [Member] | Vesting Period One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period, (in years)			3 years
Incentive Plan (2015) [Member] | Vesting Period Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period, (in years)			4 years
Incentive Plan (2015) [Member] | Vesting Period Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period, (in years)			5 years
Incentive Plan (2015) [Member] | Vesting Period Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period, (in years)			10 years

Segment And Geographic Inform52

Segment And Geographic Information (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)segment	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of operating segments | segment			1
Total sales	$ 318,609	$ 306,105	$ 618,714	$ 593,282
Property and equipment, net	256,761		256,761		$ 260,456
Outside The United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total sales	204,000	$ 198,000	393,000	$ 381,000
Property and equipment, net	$ 133,000		$ 133,000		$ 133,000

Segment And Geographic Inform53

Segment And Geographic Information (Net Sales By Major Geographical Areas) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 318,609	$ 306,105	$ 618,714	$ 593,282
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	121,648	114,243	240,087	225,095
EMEIA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	100,549	94,533	195,288	186,384
APAC [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 96,412	$ 97,329	$ 183,339	$ 181,803

Debt (Details)

Debt (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Oct. 29, 2015	May 09, 2013
Line of Credit Facility [Line Items]
Unsecured revolving line of credit							$ 50,000
Outstanding borrowing on line of credit	$ 25,000		$ 25,000		$ 25,000
Interest expense	$ 179	$ 162	$ 343	$ 343
Weighted average interest rate	2.30%	1.60%	2.30%	1.60%
Ratio of consolidated indebtedness to earnings before interest, taxes, depreciation and amortization, maximum allowed			3.25
Ratio of consolidated earnings before interest, taxes, depreciation and amortization expense, minimum allowed			3
Interest rate in event of default			2.00%
First Amendment [Member]
Line of Credit Facility [Line Items]
Unsecured revolving line of credit						$ 125,000
Optional credit line increase						$ 25,000
Minimum [Member]
Line of Credit Facility [Line Items]
Quarterly commitment fee			0.175%
Maximum [Member]
Line of Credit Facility [Line Items]
Quarterly commitment fee			0.30%
Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Variable interest rate spread			0.00%
Base Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Variable interest rate spread			0.50%
London Interbank Offered Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Variable interest rate spread			1.125%
London Interbank Offered Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Variable interest rate spread			2.00%

Commitments And Contingencies55

Commitments And Contingencies (Narrative) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2017USD ($)
Commitments And Contingencies [Abstract]
Limited warranty on most hardware products (in number of years)	1 year
Amount of non-cancelable purchase commitments with various suppliers of customized inventory and inventory components	$ 7.1
Amount of guarantees for payment of customs and foreign grants	$ 3

Commitments And Contingencies56

Commitments And Contingencies (Schedule Of Warranty Reserve) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Commitments And Contingencies [Abstract]
Balance at the beginning of the period	$ 2,686	$ 1,755
Accruals for warranties issued during the period	1,288	1,097
Accruals related to pre-existing warranties	161	291
Settlements made (in cash or in kind) during the period	(1,330)	(1,376)
Balance at the end of the period	$ 2,805	$ 1,767

Restructuring (Narrative) (Deta

Restructuring (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Restructuring [Abstract]
Estimated restructuring reduction, percent	2.00%
Restructuring accrual	$ 4,320

Restructuring (Restructuring Re

Restructuring (Restructuring Related Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Total restructuring and other related costs	$ 6,059		$ 9,176
Cost Of Sales [Member]
Total restructuring and other related costs	574		907
Research and Development Expense [Member]
Total restructuring and other related costs	1,042		1,296
Sales and Marketing [Member]
Total restructuring and other related costs	4,024		6,379
General and Administrative Expense [Member]
Total restructuring and other related costs	$ 419		$ 594

Restructuring (Restructuring 59

Restructuring (Restructuring Reserve) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Restructuring [Abstract]
Beginning Balance
Income statement expense	$ 6,059		9,176
Cash payments			(4,856)
Ending Balance	$ 4,320		$ 4,320

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event [Member]	Jul. 25, 2017$ / shares
Subsequent Event [Line Items]
Dividend payable, date declared	Jul. 26, 2017
Dividend payable, amount per share	$ 0.21
Dividend payable, date payable	Sep. 5, 2017
Dividend payable, date of record	Aug. 14, 2017