Document_and_Entity_Informatio
Document and Entity Information Document | 9 Months Ended | |
Dec. 31, 2013 | Jan. 31, 2014 | |
DEI Information [Abstract] | ' | ' |
Entity Registrant Name | 'MICROCHIP TECHNOLOGY INC | ' |
Entity Central Index Key | '0000827054 | ' |
Current Fiscal Year End Date | '--03-31 | ' |
Entity Filer Category | 'Large Accelerated Filer | ' |
Document Type | '10-Q | ' |
Document Period End Date | 31-Dec-13 | ' |
Document Fiscal Year Focus | '2014 | ' |
Document Fiscal Period Focus | 'Q3 | ' |
Amendment Flag | 'false | ' |
Entity Common Stock, Shares Outstanding | ' | 199,134,437 |
CONDENSED_CONSOLIDATED_BALANCE
CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (USD $) | Dec. 31, 2013 | Mar. 31, 2013 |
In Thousands, unless otherwise specified | ||
ASSETS | ' | ' |
Cash and cash equivalents | $375,100 | $528,334 |
Short-term investments | 932,302 | 1,050,263 |
Accounts receivable, net | 224,273 | 229,955 |
Inventories | 274,629 | 242,334 |
Prepaid expenses | 29,441 | 37,439 |
Deferred tax assets | 72,142 | 80,687 |
Other current assets | 61,141 | 67,358 |
Total current assets | 1,969,028 | 2,236,370 |
Property, plant and equipment, net | 520,565 | 514,544 |
Long-term investments | 723,925 | 257,450 |
Goodwill | 275,967 | 271,348 |
Intangible assets, net | 466,278 | 530,136 |
Other assets | 47,345 | 41,557 |
Total assets | 4,003,108 | 3,851,405 |
LIABILITIES AND STOCKHOLDERS' EQUITY | ' | ' |
Accounts payable | 62,750 | 75,551 |
Accrued liabilities | 96,176 | 127,108 |
Short-term borrowings | 14,159 | 0 |
Deferred income on shipments to distributors | 143,315 | 138,952 |
Total current liabilities | 316,400 | 341,611 |
Junior convertible debentures | 369,618 | 363,385 |
Long-term line of credit | 300,000 | 620,000 |
Long-term borrowings, net | 335,694 | 0 |
Long-term income tax payable | 179,246 | 182,723 |
Deferred tax liability | 388,620 | 388,250 |
Other long-term liabilities | 38,422 | 21,966 |
Stockholders' equity: | ' | ' |
Preferred stock, $0.001 par value; authorized 5,000,000 shares; no shares issued or outstanding | 0 | 0 |
Common stock, $0.001 par value; authorized 450,000,000 shares; 218,789,994 shares issued and 199,117,558 shares outstanding at December 31, 2013; 218,789,994 shares issued and 196,472,856 shares outstanding at March 31, 2013 | 199 | 196 |
Additional paid-in capital | 1,254,764 | 1,255,627 |
Common stock held in treasury: 19,672,436 shares at December 31, 2013; 22,317,138 shares at March 31, 2013 | -603,672 | -682,220 |
Accumulated other comprehensive (loss) income | -2,579 | 6,935 |
Retained earnings | 1,426,396 | 1,352,932 |
Total stockholders' equity | 2,075,108 | 1,933,470 |
Total liabilities and stockholders' equity | $4,003,108 | $3,851,405 |
CONDENSED_CONSOLIDATED_BALANCE1
CONDENSED CONSOLIDATED BALANCE SHEETS CONDENSED CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) (USD $) | Dec. 31, 2013 | Mar. 31, 2013 |
Preferred Stock, Par or Stated Value Per Share | $0.00 | $0.00 |
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 or Stated Value Per Share | $0.00 | $0.00 |
Common Stock, Shares Authorized | 450,000,000 | 450,000,000 |
Common Stock, Shares, Issued | 218,789,994 | 218,789,994 |
Common Stock, Shares, Outstanding | 199,117,558 | 196,472,856 |
Treasury Stock, Shares | 19,672,436 | 22,317,138 |
CONDENSED_CONSOLIDATED_STATEME
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (unaudited) (USD $) | 3 Months Ended | 9 Months Ended | ||||||
In Thousands, except Per Share data, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | ||||
Income Statement | ' | ' | ' | ' | ||||
Net sales | $482,372 | $416,047 | $1,437,833 | $1,151,479 | ||||
Cost of sales | 199,652 | [1] | 215,619 | [1] | 599,676 | [1] | 552,059 | [1] |
Gross profit | 282,720 | 200,428 | 838,157 | 599,420 | ||||
Operating expenses: | ' | ' | ' | ' | ||||
Research and development | 76,341 | [1] | 71,377 | [1] | 227,680 | [1] | 184,285 | [1] |
Selling, general and administrative | 66,856 | [1] | 69,368 | [1] | 201,934 | [1] | 196,727 | [1] |
Amortization of acquired intangible assets | 21,804 | 39,711 | 73,225 | 71,615 | ||||
Special charges | 801 | 2,559 | 2,491 | 24,953 | ||||
Total operating expenses | 165,802 | 183,015 | 505,330 | 477,580 | ||||
Operating income | 116,918 | 17,413 | 332,827 | 121,840 | ||||
Losses on equity method investments | 150 | -229 | -211 | -382 | ||||
Other income (expense): | ' | ' | ' | ' | ||||
Interest income | 4,241 | 3,813 | 12,176 | 11,889 | ||||
Interest expense | -12,545 | -11,077 | -36,755 | -30,983 | ||||
Other income (expense), net | 3,824 | -228 | 6,093 | 311 | ||||
Income before income taxes | 112,588 | 9,692 | 314,130 | 102,675 | ||||
Income tax provision (benefit) | 7,187 | -481 | 30,344 | 34,976 | ||||
Net income | 105,401 | 10,173 | 283,786 | 67,699 | ||||
Basic net income per common share | $0.53 | $0.05 | $1.43 | $0.35 | ||||
Diluted net income per common share | $0.48 | $0.05 | $1.31 | $0.33 | ||||
Dividends declared per common share | $0.35 | $0.35 | $1.06 | $1.05 | ||||
Basic common shares outstanding | 198,759 | 194,958 | 197,845 | 194,157 | ||||
Diluted common shares outstanding | 219,089 | 204,405 | 215,943 | 204,553 | ||||
Allocated Share-based Compensation Expense | $12,209 | $11,365 | $36,874 | $37,163 | ||||
[1] | Includes share-based compensation expense as follows:Cost of sales 1,841 1,834 5,674 5,758 Research and development 6,141 6,172 18,762 16,562 Selling, general and administrative 5,737 6,114 16,939 22,339 |
CONDENSED_CONSOLIDATED_STATEME1
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (PARENTHETICAL) (USD $) | 3 Months Ended | 9 Months Ended | ||||||
In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ' | ' | ' | ' | ||||
Allocated Share-based Compensation Expense | $12,209 | $11,365 | $36,874 | $37,163 | ||||
Cost of Sales [Member] | ' | ' | ' | ' | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ' | ' | ' | ' | ||||
Allocated Share-based Compensation Expense | 1,841 | [1] | 1,834 | [1] | 5,674 | [1] | 5,758 | [1] |
Research and Development Expense [Member] | ' | ' | ' | ' | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ' | ' | ' | ' | ||||
Allocated Share-based Compensation Expense | 6,141 | 6,172 | 18,762 | 16,562 | ||||
Selling General And Administrative Member | ' | ' | ' | ' | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ' | ' | ' | ' | ||||
Allocated Share-based Compensation Expense | $5,737 | $6,114 | $16,939 | $22,339 | ||||
[1] | During the three and nine months ended DecemberB 31, 2013, $1.9 million and $5.7 million, respectively, of share-based compensation expense was capitalized to inventory and $1.8 million and $5.7 million, respectively, of previously capitalized share-based compensation expenses in inventory was sold. During the three and nine months ended DecemberB 31, 2012, $1.8 million and $5.3 million, respectively, of share-based compensation expense was capitalized to inventory and $1.8 million and $5.8 million, respectively, of previously capitalized share-based compensation expense in inventory was sold. |
CONDENSED_CONSOLIDATED_STATEME2
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) (USD $) | 3 Months Ended | 9 Months Ended | ||
In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 |
Net income | $105,401 | $10,173 | $283,786 | $67,699 |
Unrealized holding gain (losses), net of tax effect of $0, $83, $497 and $119, respectively | 59 | -200 | -8,011 | 2,418 |
Reclassification of realized transactions, net of tax effect of $0, $0, $776, and $51, respectively | -113 | -14 | -1,503 | -184 |
Change in net foreign currency translation adjustment | 0 | 299 | 0 | 1,439 |
Other comprehensive (loss) income, net of taxes | -54 | 85 | -9,514 | 3,673 |
Total comprehensive income | $105,347 | $10,258 | $274,272 | $71,372 |
CONDENSED_CONSOLIDATED_STATEME3
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (PARENTHETICAL) (USD $) | 3 Months Ended | 9 Months Ended | ||
In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 |
Statement of Other Comprehensive Income [Abstract] | ' | ' | ' | ' |
Other Comprehensive Income (Loss), Available-for-sale Securities, Tax, Portion Attributable to Parent | $0 | $83 | $497 | $119 |
CONDENSED_CONSOLIDATED_STATEME4
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) | 9 Months Ended | |
In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 |
Cash flows from operating activities | ' | ' |
Net income | $283,786 | $67,699 |
Adjustments to reconcile net income to net cash provided by operating activities: | ' | ' |
Depreciation and amortization | 143,704 | 140,468 |
Deferred income taxes | 24,190 | -9,981 |
Share-based compensation expense related to equity incentive plans | 41,375 | 38,713 |
Excess tax benefit from share-based compensation | 0 | -154 |
Convertible debt derivatives - revaluation and amortization | -449 | 253 |
Amortization of debt discount on convertible debentures | 6,682 | 6,106 |
Amortization of debt issuance costs | 1,416 | 164 |
Losses on equity method investments | 211 | 382 |
Gain on sale of assets | 0 | -256 |
Loss on write-down of fixed assets | 0 | 400 |
Impairment of intangible assets | 350 | 0 |
Amortization of premium on available-for-sale investments | 8,067 | 10,304 |
Unrealized impairment loss on available-for-sale investments | 0 | 412 |
Special income, net | -999 | 0 |
Gain on shares of acquired company | -2,438 | 0 |
Changes In Operating Assets And Liabilities | ' | ' |
Decrease in accounts receivable | 5,624 | 52,839 |
(Increase) decrease in inventories | -30,588 | 47,146 |
Increase in deferred income on shipments to distributors | 4,363 | 2,526 |
Decrease in accounts payable and accrued liabilities | -21,870 | -58,539 |
Change in other assets and liabilities | 9,799 | 33,000 |
Net cash provided by operating activities | 473,223 | 331,482 |
Cash flows from investing activities | ' | ' |
Purchases of available-for-sale investments | -950,560 | -656,728 |
Sales and maturities of available-for-sale investments | 584,186 | 517,707 |
Acquisition of SMSC, net of cash acquired | 0 | -731,746 |
Other business acquisitions, net of cash acquired | -11,187 | -20,556 |
Investments in other assets | -7,462 | -4,018 |
Proceeds from sale of assets | 16,200 | 306 |
Capital expenditures | -79,536 | -36,076 |
Net cash used in investing activities | -448,359 | -931,111 |
Cash flows from financing activities: | ' | ' |
Repayments of revolving loan under previous credit facility | -650,000 | -130,000 |
Repayments of revolving loan under new credit facility | -153,500 | 0 |
Proceeds from borrowings on revolving loan under previous credit facility | 30,000 | 740,000 |
Proceeds from borrowings on revolving loan under new credit facility | 453,500 | 0 |
Proceeds from issuance of long-term borrowings | 350,000 | 0 |
Deferred financing costs | -7,515 | 0 |
Payment of cash dividends | -210,322 | -204,592 |
Proceeds from sale of common stock | 24,752 | 22,619 |
Contingent consideration payment | -14,700 | 0 |
Capital lease payments | -313 | 0 |
Excess tax benefit from share-based compensation | 0 | 154 |
Net cash (used in) provided by financing activities | -178,098 | 428,181 |
Effect of foreign exchange rate changes on cash and cash equivalents | 0 | 986 |
Net decrease in cash and cash equivalents | -153,234 | -170,462 |
Cash and cash equivalents at beginning of period | 528,334 | 635,755 |
Cash and cash equivalents at end of period | $375,100 | $465,293 |
Basis_of_Presentation_Notes
Basis of Presentation (Notes) | 9 Months Ended |
Dec. 31, 2013 | |
Basis of Presentation [Abstract] | ' |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] | ' |
Basis of Presentation | |
The accompanying unaudited condensed consolidated financial statements include the accounts of Microchip Technology Incorporated and its wholly-owned subsidiaries (the Company).  All intercompany balances and transactions have been eliminated in consolidation.  The Company owns 100% of the outstanding stock in all of its subsidiaries. | |
The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America, pursuant to the rules and regulations of the Securities and Exchange Commission (the SEC).  The information furnished herein reflects all adjustments which are, in the opinion of management, of a normal recurring nature and necessary for a fair statement of the results for the interim periods reported. Certain information and footnote disclosures normally included in audited consolidated financial statements have been condensed or omitted pursuant to such SEC rules and regulations.  It is suggested that these condensed consolidated financial statements be read in conjunction with the audited consolidated financial statements and the notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended March 31, 2013.  The results of operations for the nine months ended December 31, 2013 are not necessarily indicative of the results that may be expected for the fiscal year ending March 31, 2014 or for any other period. |
Reclassification_of_Prior_Peri
Reclassification of Prior Periods (Notes) | 9 Months Ended | |||||||||||
Dec. 31, 2013 | ||||||||||||
Accounting Changes and Error Corrections [Abstract] | ' | |||||||||||
Reclassification of Prior Periods | ' | |||||||||||
Reclassification of Prior Periods | ||||||||||||
In the quarter ended December 31, 2013, the Company identified an error to the presentation on the condensed consolidated statements of cash flows of the amortization of premium of available-for-sale investments. The Company previously included the amortization of the premium as an investing activity. This amortization is a non-cash expense that should be recorded in the adjustments to reconcile net income to net cash provided by operating activities. The Company has corrected this error in the current period, and has conformed previous periods to the current presentation. Based on the Company's evaluation of relevant quantitative and qualitative factors, it determined that the classification errors are immaterial to the prior period financial statements and the Company plans to correct the comparative presentation of the prior periods in future filings. The effect on net cash provided by operating activities and net cash used in investing activities for the previous period covered by this report are shown below (amounts in thousands): | ||||||||||||
Nine Months Ended | ||||||||||||
31-Dec-12 | ||||||||||||
As reported | Adjustment | As adjusted | ||||||||||
Cash flows from operating activities | ||||||||||||
Amortization of premium on available-for-sale investments | $ | — | $ | 10,304 | $ | 10,304 | ||||||
Net cash provided by operating activities | 321,178 | 10,304 | 331,482 | |||||||||
Cash flows from investing activities | ||||||||||||
Purchases of available-for-sale investments | (646,424 | ) | (10,304 | ) | (656,728 | ) | ||||||
Net cash used in investing activities | (920,807 | ) | (10,304 | ) | (931,111 | ) | ||||||
This correction does not affect the Company's condensed consolidated statements of income, condensed consolidated balance sheets or condensed consolidated statements of comprehensive income for any periods. |
Business_Acquisitions_Notes
Business Acquisitions (Notes) | 9 Months Ended | |||||||||||
Dec. 31, 2013 | ||||||||||||
Business Acquisition [Line Items] | ' | |||||||||||
Business Combination Disclosure [Text Block] | ' | |||||||||||
Business Acquisitions | ||||||||||||
On November 21, 2013, the Company completed an acquisition which was accounted for under the acquisition method of accounting. The Company had a prior 18.3% ownership interest in the acquired company accounted for as a cost method investment and recognized an approximate $2.4 million gain to write that ownership interest up to fair value in the three and nine-month periods ended December 31, 2013. The total consideration paid for the remaining 81.7% equity of the business, net of cash acquired, was $9.0 million. The purchase price of the acquisition resulted in purchased intangible assets of $4.1 million and goodwill of approximately $6.4 million. The purchased intangible assets are being amortized over a weighted average period of approximately 8 years. | ||||||||||||
On August 2, 2012, the Company acquired Standard Microsystems Corporation (SMSC), a publicly traded company based in Hauppauge, New York. The acquisition was accounted for under the acquisition method of accounting. The Company retained an independent third-party appraiser to assist management in its valuation. The table below represents the allocation of the purchase price, including adjustments to the purchase price allocation from the previously reported figures at March 31, 2013, to the net assets acquired based on their estimated fair values as of August 2, 2012. The purchase price allocation was finalized as of August 2, 2013. All adjustments shown in the table below were recorded during the three months ended June 30, 2013 (amounts in thousands): | ||||||||||||
Assets acquired | Previously Reported | Adjustments | 31-Dec-13 | |||||||||
31-Mar-13 | ||||||||||||
Cash and cash equivalents | $ | 180,925 | $ | — | $ | 180,925 | ||||||
Accounts receivable, net | 58,441 | — | 58,441 | |||||||||
Inventories | 86,244 | — | 86,244 | |||||||||
Prepaid expenses | 5,617 | — | 5,617 | |||||||||
Deferred tax assets | 15,843 | — | 15,843 | |||||||||
Other current assets | 17,578 | — | 17,578 | |||||||||
Property, plant and equipment, net | 35,608 | — | 35,608 | |||||||||
Long-term investments | 24,275 | — | 24,275 | |||||||||
Goodwill | 169,065 | (3,473 | ) | 165,592 | ||||||||
Intangible assets, net | 10,214 | — | 10,214 | |||||||||
Purchased intangible assets | 517,800 | — | 517,800 | |||||||||
Other assets | 3,835 | — | 3,835 | |||||||||
Total assets acquired | 1,125,445 | (3,473 | ) | 1,121,972 | ||||||||
Liabilities assumed | ||||||||||||
Accounts payable | (28,035 | ) | — | (28,035 | ) | |||||||
Accrued liabilities | (62,038 | ) | (209 | ) | (62,247 | ) | ||||||
Deferred income on shipments to distributors | (11,376 | ) | — | (11,376 | ) | |||||||
Long-term income tax payable | (72,781 | ) | — | (72,781 | ) | |||||||
Deferred tax liability | (21,079 | ) | 4,397 | (16,682 | ) | |||||||
Other liabilities | (10,535 | ) | (715 | ) | (11,250 | ) | ||||||
Total liabilities assumed | (205,844 | ) | 3,473 | (202,371 | ) | |||||||
Purchase price allocated | $ | 919,601 | $ | — | $ | 919,601 | ||||||
Recently_Issued_Accounting_Pro
Recently Issued Accounting Pronouncements (Notes) | 9 Months Ended |
Dec. 31, 2013 | |
New Accounting Pronouncements and Changes in Accounting Principles [Abstract] | ' |
Description of New Accounting Pronouncements Not yet Adopted [Text Block] | ' |
Recently Issued Accounting Pronouncements | |
In the first quarter of fiscal 2014, the Company adopted the provisions of Accounting Standard Update 2013-02 Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income, which required the disclosure of amounts reclassified out of accumulated other comprehensive income (AOCI) to net income. The adoption of this provision did not have a material impact on the Company's consolidated financial statements and related disclosures (See Note 19). |
Special_Charges_Notes
Special Charges (Notes) | 9 Months Ended |
Dec. 31, 2013 | |
Notes to Financial Statements [Abstract] | ' |
Special charges | ' |
Special Charges | |
During the three and nine months ended December 31, 2013, the Company incurred severance related, office closing and other costs associated with its acquisition activity of $0.8 million and $2.5 million, respectively. | |
During the three and nine months ended December 31, 2012, the Company incurred approximately $2.6 million and $13.4 million, respectively, of severance related, office closing, and other costs associated with the acquisition of SMSC. Also, during the nine months ended December 31, 2012, the Company incurred legal settlement costs of approximately $11.5 million for certain legal matters related to Silicon Storage Technology, Inc. (which the Company acquired in April 2010) in excess of previously accrued amounts. |
Segment_Information_Notes
Segment Information (Notes) | 9 Months Ended | |||||||||||||||
Dec. 31, 2013 | ||||||||||||||||
Segment Reporting [Abstract] | ' | |||||||||||||||
Segment Reporting Disclosure [Text Block] | ' | |||||||||||||||
Segment Information | ||||||||||||||||
The Company's reportable segments are semiconductor products and technology licensing.  The Company does not allocate operating expenses, interest income, interest expense, other income or expense, or provision for or benefit from income taxes to these segments for internal reporting purposes, as the Company does not believe that allocating these expenses is beneficial in evaluating segment performance.  Additionally, the Company does not allocate assets to segments for internal reporting purposes as it does not manage its segments by such metrics. | ||||||||||||||||
The following table represents net sales and gross profit for each segment for the three and nine months ended December 31, 2013 (amounts in thousands): | ||||||||||||||||
Three Months Ended | Nine Months Ended | |||||||||||||||
December 31, 2013 | December 31, 2013 | |||||||||||||||
Net Sales | Gross Profit | Net Sales | Gross Profit | |||||||||||||
Semiconductor products | $ | 458,298 | $ | 258,646 | $ | 1,366,415 | $ | 766,739 | ||||||||
Technology licensing | 24,074 | 24,074 | 71,418 | 71,418 | ||||||||||||
$ | 482,372 | $ | 282,720 | $ | 1,437,833 | $ | 838,157 | |||||||||
The following table represents net sales and gross profit for each segment for the three and nine months ended December 31, 2012 (amounts in thousands): | ||||||||||||||||
Three Months Ended | Nine Months Ended | |||||||||||||||
December 31, 2012 | December 31, 2012 | |||||||||||||||
Net Sales | Gross Profit | Net Sales | Gross Profit | |||||||||||||
Semiconductor products | $ | 394,709 | $ | 179,090 | $ | 1,089,738 | $ | 537,679 | ||||||||
Technology licensing | 21,338 | 21,338 | 61,741 | 61,741 | ||||||||||||
$ | 416,047 | $ | 200,428 | $ | 1,151,479 | $ | 599,420 | |||||||||
Investments_Notes
Investments (Notes) | 9 Months Ended | |||||||||||||||
Dec. 31, 2013 | ||||||||||||||||
Investments [Abstract] | ' | |||||||||||||||
Investments | ' | |||||||||||||||
Investments | ||||||||||||||||
The Company's investments are intended to establish a high-quality portfolio that preserves principal, meets liquidity needs, avoids inappropriate concentrations, and delivers an appropriate yield in relationship to the Company's investment guidelines and market conditions.  The following is a summary of available-for-sale securities at December 31, 2013 (amounts in thousands): | ||||||||||||||||
Available-for-sale Securities | ||||||||||||||||
Adjusted | Gross | Gross | Estimated | |||||||||||||
Cost | Unrealized | Unrealized | Fair Value | |||||||||||||
Gains | Losses | |||||||||||||||
Government agency bonds | $ | 741,492 | $ | 164 | $ | (5,645 | ) | $ | 736,011 | |||||||
Municipal bonds | 51,940 | 20 | (209 | ) | 51,751 | |||||||||||
Auction rate securities | 9,827 | — | — | 9,827 | ||||||||||||
Corporate bonds and debt | 857,038 | 2,858 | (1,258 | ) | 858,638 | |||||||||||
$ | 1,660,297 | $ | 3,042 | $ | (7,112 | ) | $ | 1,656,227 | ||||||||
The following is a summary of available-for-sale and marketable equity securities at March 31, 2013 (amounts in thousands): | ||||||||||||||||
Available-for-sale Securities | ||||||||||||||||
Adjusted | Gross | Gross | Estimated | |||||||||||||
Cost | Unrealized | Unrealized | Fair Value | |||||||||||||
Gains | Losses | |||||||||||||||
Government agency bonds | $ | 558,116 | $ | 335 | $ | (298 | ) | $ | 558,153 | |||||||
Municipal bonds | 25,000 | 146 | (8 | ) | 25,138 | |||||||||||
Auction rate securities | 33,459 | 332 | — | 33,791 | ||||||||||||
Corporate bonds and debt | 680,144 | 5,137 | (159 | ) | 685,122 | |||||||||||
Marketable equity securities | 5,270 | 239 | — | 5,509 | ||||||||||||
$ | 1,301,989 | $ | 6,189 | $ | (465 | ) | $ | 1,307,713 | ||||||||
   | ||||||||||||||||
At December 31, 2013, the Company's available-for-sale debt securities are presented on the condensed consolidated balance sheets as short-term investments of $932.3 million and long-term investments of $723.9 million.  At March 31, 2013, the Company’s available-for-sale debt securities and marketable equity securities are presented on the condensed consolidated balance sheets as short-term investments of $1,050.3 million and long-term investments of $257.5 million. | ||||||||||||||||
At December 31, 2013, the Company evaluated its investment portfolio and noted unrealized losses of $7.1 million on its debt securities which were due primarily to higher interest rates and resulting declines in market prices.  Management does not believe any of the unrealized losses represent an other-than-temporary impairment based on its evaluation of available evidence as of December 31, 2013 and the Company's intent is to hold these investments until these assets are no longer impaired, except for certain auction rate securities (ARS).  For those debt securities not scheduled to mature until after December 31, 2014, such recovery is not anticipated to occur in the next year and these investments have been classified as long-term investments. | ||||||||||||||||
The amortized cost and estimated fair value of the available-for-sale securities at December 31, 2013, by contractual maturity, excluding corporate debt of $6.2 million, which has no contractual maturity, are shown below (amounts in thousands).  Expected maturities can differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties, and the Company views its available-for-sale securities as available for current operations. | ||||||||||||||||
Adjusted | Gross | Gross | Estimated | |||||||||||||
Cost | Unrealized | Unrealized | Fair Value | |||||||||||||
Gains | Losses | |||||||||||||||
Available-for-sale | ||||||||||||||||
Due in one year or less | $ | 190,841 | $ | 721 | $ | — | $ | 191,562 | ||||||||
Due after one year and through five years | 1,332,690 | 2,321 | (2,223 | ) | 1,332,788 | |||||||||||
Due after five years and through ten years | 120,749 | — | (4,889 | ) | 115,860 | |||||||||||
Due after ten years | 9,827 | — | — | 9,827 | ||||||||||||
$ | 1,654,107 | $ | 3,042 | $ | (7,112 | ) | $ | 1,650,037 | ||||||||
The Company had no material realized gains or losses from the sale of available-for-sale marketable equity securities or debt securities during each of the three and nine-month periods ended December 31, 2013 and 2012. |
Fair_Value_Measurements_Notes
Fair Value Measurements (Notes) | 9 Months Ended | ||||||||||||||||
Dec. 31, 2012 | |||||||||||||||||
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract] | ' | ||||||||||||||||
Fair Value Measurements | ' | ||||||||||||||||
Fair Value Measurements | |||||||||||||||||
Accounting rules for fair value clarify that fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the Company utilizes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows: | |||||||||||||||||
Level 1- | Observable inputs such as quoted prices in active markets; | ||||||||||||||||
Level 2- | Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and | ||||||||||||||||
Level 3- | Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions. | ||||||||||||||||
Marketable Debt Instruments | |||||||||||||||||
Marketable debt instruments include instruments such as corporate bonds and debt, government agency bonds, bank deposits, municipal bonds, and money market fund deposits. When the Company uses observable market prices for identical securities that are traded in less active markets, the Company classifies its marketable debt instruments as Level 2. When observable market prices for identical securities are not available, the Company prices its marketable debt instruments using non-binding market consensus prices that are corroborated with observable market data; quoted market prices for similar instruments; or pricing models, such as a discounted cash flow model, with all significant inputs derived from or corroborated with observable market data. Non-binding market consensus prices are based on the proprietary valuation models of pricing providers or brokers. These valuation models incorporate a number of inputs, including non-binding and binding broker quotes; observable market prices for identical or similar securities; and the internal assumptions of pricing providers or brokers that use observable market inputs and, to a lesser degree, unobservable market inputs. The Company corroborates non-binding market consensus prices with observable market data using statistical models when observable market data exists. The discounted cash flow model uses observable market inputs, such as LIBOR-based yield curves, currency spot and forward rates, and credit ratings. | |||||||||||||||||
Assets and Liabilities Measured at Fair Value on a Recurring Basis | |||||||||||||||||
Assets measured at fair value on a recurring basis at December 31, 2013 are as follows (amounts in thousands): | |||||||||||||||||
Quoted Prices | Significant | Significant | Total | ||||||||||||||
in Active | Other | Unobservable | Balance | ||||||||||||||
Markets for | Observable | Inputs | |||||||||||||||
Identical | Inputs | (Level 3) | |||||||||||||||
Instruments | (Level 2) | ||||||||||||||||
(Level 1) | |||||||||||||||||
Assets | |||||||||||||||||
Money market mutual funds | $ | 114,235 | $ | — | $ | — | $ | 114,235 | |||||||||
Corporate bonds and debt | — | 852,448 | 6,190 | 858,638 | |||||||||||||
Government agency bonds | — | 736,011 | — | 736,011 | |||||||||||||
Deposit accounts | — | 260,865 | — | 260,865 | |||||||||||||
Municipal bonds | — | 51,751 | — | 51,751 | |||||||||||||
Auction rate securities | — | — | 9,827 | 9,827 | |||||||||||||
Total assets measured at fair value | $ | 114,235 | $ | 1,901,075 | $ | 16,017 | $ | 2,031,327 | |||||||||
Assets and liabilities measured at fair value on a recurring basis at March 31, 2013 are as follows (amounts in thousands): | |||||||||||||||||
Quoted Prices | Significant | Significant | Total | ||||||||||||||
in Active | Other | Unobservable | Balance | ||||||||||||||
Markets for Identical Instruments | Observable | Inputs | |||||||||||||||
(Level 1) | Inputs | (Level 3) | |||||||||||||||
(Level 2) | |||||||||||||||||
Assets | |||||||||||||||||
Money market fund deposits | $ | 100,878 | $ | — | $ | — | $ | 100,878 | |||||||||
Marketable equity securities | 5,509 | — | — | 5,509 | |||||||||||||
Corporate bonds and debt | — | 678,932 | 6,190 | 685,122 | |||||||||||||
Government agency bonds | — | 558,153 | — | 558,153 | |||||||||||||
Deposit accounts | — | 427,456 | — | 427,456 | |||||||||||||
Municipal bonds | — | 25,138 | — | 25,138 | |||||||||||||
Auction rate securities | — | — | 33,791 | 33,791 | |||||||||||||
Total assets measured at fair value | $ | 106,387 | $ | 1,689,679 | $ | 39,981 | $ | 1,836,047 | |||||||||
Liabilities | |||||||||||||||||
Contingent consideration | $ | — | $ | — | $ | 19,100 | $ | 19,100 | |||||||||
Total liabilities measured at fair value | $ | — | $ | — | $ | 19,100 | $ | 19,100 | |||||||||
There were no transfers between Level 1 and Level 2 during the three and nine-month periods ended December 31, 2013 or the year ended March 31, 2013. | |||||||||||||||||
At December 31, 2013, the Company's ARS for which recent auctions were unsuccessful are made up of securities related to the insurance industry valued at $9.8 million. At March 31, 2013, the Company's ARS for which recent auctions were unsuccessful were made up of bonds related to the insurance sector valued at $9.8 million, securities related to the energy and telecommunications sectors valued at $5.3 million, and student loan securities valued at $18.7 million. | |||||||||||||||||
The Company estimated the fair value of its ARS, which are classified as Level 3 securities, based on the following: (i) the underlying structure of each security; (ii) the present value of future principal and interest payments discounted at rates considered to reflect current market conditions; (iii) consideration of the probabilities of default, auction failure, or repurchase at par for each period; and (iv) estimates of the recovery rates in the event of default for each security. The significant unobservable inputs used in the fair value measurement of the insurance sector ARS were estimated risk free discount rates, liquidity risk premium, and the liquidity horizon. The risk free discount rate applied to these securities was 2% to 2.5% adjusted for the liquidity risk premium which ranged from 9.1% to 29.5%. The anticipated liquidity horizon ranged from 7 to 10 years. A significant increase in the liquidity premium or discount rate, in isolation, would lead to a significantly lower fair value measurement. A significant increase in the liquidity horizon, in isolation, would lead to a significantly lower fair value measurement. Each quarter the Company investigates material changes in the fair value measurements of its ARS. | |||||||||||||||||
Level 3 liabilities at March 31, 2013 include contingent consideration from the Company's Roving Networks acquisition, which was fully paid as of December 31, 2013. The Company evaluates the estimated fair value of its contingent consideration on a quarterly basis based on certain revenue and gross margin performance criteria and records fair value adjustments as necessary. | |||||||||||||||||
The following tables present a reconciliation for all assets and liabilities measured at fair value on a recurring basis, excluding accrued interest components, using significant unobservable inputs (Level 3) for the nine months ended December 31, 2013, and the year ended March 31, 2013 (amounts in thousands): | |||||||||||||||||
Nine months ended December 31, 2013 | Auction Rate | Corporate | Contingent | Total Gains | |||||||||||||
Securities | Debt | Consideration | (Losses) | ||||||||||||||
Balance at March 31, 2013 | $ | 33,791 | $ | 6,190 | $ | (19,100 | ) | $ | — | ||||||||
Total gains (losses) (realized and unrealized): | |||||||||||||||||
Included in earnings | 1,103 | — | (1,370 | ) | (267 | ) | |||||||||||
  Included in other comprehensive income | (332 | ) | — | — | (332 | ) | |||||||||||
Purchases, sales, issuances, and settlements, net | (24,735 | ) | — | 20,470 | — | ||||||||||||
Balance at December 31, 2013 | $ | 9,827 | $ | 6,190 | $ | — | $ | (599 | ) | ||||||||
Year ended March 31, 2013 | Auction Rate | Corporate | Contingent | Total Gains | |||||||||||||
Securities | Debt | Consideration | (Losses) | ||||||||||||||
Balance at March 31, 2012 | $ | 10,246 | $ | 4,625 | $ | — | $ | — | |||||||||
Total gains (losses) (realized and unrealized): | |||||||||||||||||
Included in earnings | (412 | ) | — | (4,400 | ) | $ | (4,813 | ) | |||||||||
  Included in other comprehensive income | 332 | — | — | 332 | |||||||||||||
Purchases, sales, issuances, and settlements, net | (650 | ) | 1,565 | — | — | ||||||||||||
Acquisition-related | 24,275 | — | (14,700 | ) | — | ||||||||||||
Balance at March 31, 2013 | $ | 33,791 | $ | 6,190 | $ | (19,100 | ) | $ | (4,481 | ) | |||||||
Assets measured at fair value on a recurring basis are presented/classified on the condensed consolidated balance sheets at December 31, 2013 as follows (amounts in thousands): | |||||||||||||||||
Quoted Prices | Significant | Significant | Total | ||||||||||||||
 in Active | Other | Unobservable | Balance | ||||||||||||||
Markets for | Observable | Inputs | |||||||||||||||
Identical | Inputs | (Level 3) | |||||||||||||||
Instruments | (Level 2) | ||||||||||||||||
(Level 1) | |||||||||||||||||
Assets | |||||||||||||||||
Cash and cash equivalents | $ | 114,235 | $ | 260,865 | $ | — | $ | 375,100 | |||||||||
Short-term investments | — | 932,302 | — | 932,302 | |||||||||||||
Long-term investments | — | 707,908 | 16,017 | 723,925 | |||||||||||||
Total assets measured at fair value | $ | 114,235 | $ | 1,901,075 | $ | 16,017 | $ | 2,031,327 | |||||||||
Assets measured at fair value on a recurring basis are presented/classified in the consolidated balance sheets at March 31, 2013 as follows (amounts in thousands): | |||||||||||||||||
Quoted Prices | Significant | Significant | Total | ||||||||||||||
in Active | Other | Unobservable | Balance | ||||||||||||||
Markets for | Observable | Inputs | |||||||||||||||
Identical | Inputs | Â (Level 3) | |||||||||||||||
Instruments | (Level 2) | ||||||||||||||||
(Level 1) | |||||||||||||||||
Assets | |||||||||||||||||
Cash and cash equivalents | $ | 100,878 | $ | 427,456 | $ | — | $ | 528,334 | |||||||||
Short-term investments | — | 1,050,263 | — | 1,050,263 | |||||||||||||
Long-term investments | 5,509 | 211,960 | 39,981 | 257,450 | |||||||||||||
Total assets measured at fair value | $ | 106,387 | $ | 1,689,679 | $ | 39,981 | $ | 1,836,047 | |||||||||
Financial Assets Not Recorded at Fair Value on a Recurring Basis | |||||||||||||||||
The Company's non-marketable equity and cost-method investments are not recorded at fair value on a recurring basis.  These investments are monitored on a quarterly basis for impairment charges.  The investments will only be recorded at fair value when an impairment charge is recognized.  There were no impairment charges recognized on these investments in the three and nine months ended December 31, 2013. The Company recognized impairment charges of $0.5 million during the three and nine months ended December 31, 2012. These investments are included in other assets on the condensed consolidated balance sheet. |
Fair_Value_of_Financial_Instru
Fair Value of Financial Instruments (Notes) | 9 Months Ended |
Dec. 31, 2013 | |
Fair Value Disclosures [Abstract] | ' |
Fair Value of Financial Instruments | ' |
Fair Value of Financial Instruments | |
The carrying amount of cash equivalents approximates fair value because their maturity is less than three months. Management believes the carrying amount of the equity and cost-method investments materially approximated fair value at December 31, 2013 based upon unobservable inputs. The fair values of these investments have been determined as Level 3 fair value measurements. The fair values of the Company's line of credit and short-term and long-term borrowings are estimated using discounted cash flow analyses, based on the Company's current incremental borrowing rates for similar types of borrowing arrangements and approximate carrying value. Based on the borrowing rates currently available to the Company for bank loans with similar terms and average maturities, the fair value of the Company's line of credit and long-term borrowings at December 31, 2013 approximated book value and are considered Level 2 in the fair value hierarchy described in Note 8. The carrying amount of accounts receivable, accounts payable and accrued liabilities approximates fair value due to the short-term maturity of the amounts.  The fair value of the Company's junior subordinated convertible debentures was $1.987 billion at December 31, 2013 and $1.639 billion at March 31, 2013 based on observable market prices for these debentures, which are traded in less active markets and are therefore classified as a Level 2 fair value measurement. |
Accounts_Receivable_Notes
Accounts Receivable (Notes) | 9 Months Ended | |||||||
Dec. 31, 2013 | ||||||||
Accounts Receivable, Net [Abstract] | ' | |||||||
Accounts Receivable | ' | |||||||
Accounts Receivable | ||||||||
Accounts receivable consists of the following (amounts in thousands): | ||||||||
December 31, 2013 | March 31, 2013 | |||||||
Trade accounts receivable | $ | 224,832 | $ | 230,469 | ||||
Other | 2,102 | 2,250 | ||||||
226,934 | 232,719 | |||||||
Less allowance for doubtful accounts | 2,661 | 2,764 | ||||||
$ | 224,273 | $ | 229,955 | |||||
Inventories_Notes
Inventories (Notes) | 9 Months Ended | |||||||
Dec. 31, 2013 | ||||||||
Inventory, Net [Abstract] | ' | |||||||
Inventories | ' | |||||||
Inventories | ||||||||
The components of inventories consist of the following (amounts in thousands): | ||||||||
December 31, 2013 | March 31, 2013 | |||||||
Raw materials | $ | 9,555 | $ | 9,020 | ||||
Work in process | 187,822 | 181,750 | ||||||
Finished goods | 77,252 | 51,564 | ||||||
$ | 274,629 | $ | 242,334 | |||||
Inventories are valued at the lower of cost or market using the first-in, first-out method. Inventory impairment charges establish a new cost basis for inventory and charges are not subsequently reversed to income even if circumstances later suggest that increased carrying amounts are recoverable. |
Property_Plant_and_Equipment_N
Property, Plant and Equipment (Notes) | 9 Months Ended | |||||||
Dec. 31, 2013 | ||||||||
Property, Plant and Equipment [Abstract] | ' | |||||||
Property, Plant and Equipment Disclosure [Text Block] | ' | |||||||
Property, Plant and Equipment | ||||||||
Property, plant and equipment consists of the following (amounts in thousands): | ||||||||
December 31, 2013 | March 31, 2013 | |||||||
Land | $ | 55,601 | $ | 47,102 | ||||
Building and building improvements | 407,520 | 396,611 | ||||||
Machinery and equipment | 1,442,169 | 1,377,814 | ||||||
Projects in process | 62,217 | 76,158 | ||||||
1,967,507 | 1,897,685 | |||||||
Less accumulated depreciation and amortization | 1,446,942 | 1,383,141 | ||||||
$ | 520,565 | $ | 514,544 | |||||
Depreciation expense attributed to property, plant and equipment was $22.2 million and $66.7 million for the three and nine months ended December 31, 2013, respectively, and $23.0 million and $66.0 million for the three and nine months ended December 31, 2012, respectively. |
Accrued_Liabilities_Notes
Accrued Liabilities (Notes) | 9 Months Ended | |||||||
Dec. 31, 2013 | ||||||||
Liabilities, Current [Abstract] | ' | |||||||
Accrued liabilities | ' | |||||||
Accrued Liabilities | ||||||||
Accrued liabilities consist of the following (amounts in thousands): | ||||||||
December 31, 2013 | March 31, 2013 | |||||||
Acquisition related contingent consideration | $ | — | $ | 19,100 | ||||
Other accrued expenses | 96,176 | 108,008 | ||||||
$ | 96,176 | $ | 127,108 | |||||
Income_taxes_Notes
Income taxes (Notes) | 9 Months Ended |
Dec. 31, 2013 | |
Income Tax Disclosure [Abstract] | ' |
Income Taxes | ' |
Income Taxes | |
The provision for income taxes reflects tax on foreign earnings and federal and state tax on U.S. earnings.  The Company had an effective tax rate of 9.7% for the nine-month period ended December 31, 2013 and 34.1% for the nine-month period ended December 31, 2012.  During the three and nine months ended December 31, 2013, the Company recognized a net $6.2 million one-time tax benefit associated with a favorable settlement of an IRS examination for fiscal years 2009 and 2010 offset by unfavorable items associated with the filing of the Company's fiscal 2013 tax returns as compared to its year-end tax provisions. The Company's effective tax rate is lower than statutory rates in the U.S. due primarily to its mix of earnings in foreign jurisdictions with lower tax rates and the aforementioned net tax benefit. The Company's effective tax rate was higher in the December 31, 2012 period due to certain tax expenses associated with the acquisition of SMSC. | |
At December 31, 2013, the Company had $179.2 million of unrecognized tax benefits.  Unrecognized tax benefits decreased by $3.5 million compared to March 31, 2013 primarily as a result of the release of accruals related to the settlement of an IRS audit offset by the ongoing accrual for uncertain tax positions and the accrual of deficiency interest on these positions. | |
The Company files U.S. federal, U.S. state, and foreign income tax returns.  For U.S. federal, and in general for U.S. state tax returns, the fiscal 2011 and later tax years remain open for examination by tax authorities. The IRS is currently auditing SMSC's 2011 and 2012 tax years.  For foreign tax returns, the Company is generally no longer subject to income tax examinations for years prior to fiscal 2005. | |
The Company recognizes liabilities for anticipated tax audit issues in the U.S. and other tax jurisdictions based on its estimate of whether, and the extent to which, additional tax payments are more likely than not.  The Company believes that it has appropriate support for the income tax positions taken on its tax returns and that its accruals for tax liabilities are adequate for all open years based on an assessment of many factors including past experience and interpretations of tax laws applied to the facts of each matter. | |
The Company believes that it maintains appropriate reserves to offset any potential income tax liabilities that may arise upon final resolution of matters for open tax years.  If such reserve amounts ultimately prove to be unnecessary, the resulting reversal of such reserves would result in tax benefits being recorded in the period the reserves are no longer deemed necessary.  If such amounts prove to be less than an ultimate assessment, a future charge to expense would be recorded in the period in which the assessment is determined.  Although the timing of the resolution and/or closure of audits is highly uncertain, the Company does not believe it is reasonably possible that its unrecognized tax benefits would materially change in the next 12 months. |
2125_Junior_subordinated_conve
2.125% Junior subordinated convertible debentures (Notes) | 9 Months Ended |
Dec. 31, 2013 | |
Convertible Debt [Abstract] | ' |
Junior subordinated convertible debentures | ' |
2.125% Junior Subordinated Convertible Debentures | |
The Company's $1.15 billion principal amount of 2.125% junior subordinated convertible debentures due December 15, 2037, are subordinated in right of payment to any future senior debt of the Company and are effectively subordinated in right of payment to the liabilities of the Company's subsidiaries.  The debentures are convertible, subject to certain conditions, into shares of the Company's common stock at an initial conversion rate of 29.2783 shares of common stock per $1,000 principal amount of debentures, representing an initial conversion price of approximately $34.16 per share of common stock.  As of December 31, 2013, the holders of the debentures had the right to convert their debentures between October 1, 2013 and December 31, 2013 because for at least 20 trading days during the 30 consecutive trading day period ending on December 31, 2013, the Company's common stock had a last reported sale price greater than 130% of the conversion price. As of December 31, 2013, a holder could realize more economic value by selling its debentures in the over the counter market than from converting its debentures. As a result of cash dividends paid since the issuance of the debentures, the conversion rate has been adjusted to 38.3572 shares of common stock per $1,000 of principal amount of debentures, representing a conversion price of approximately $26.07 per share of common stock. | |
As the debentures can be settled in cash upon conversion, for accounting purposes, the debentures were bifurcated into a liability component and an equity component, which are both initially recorded at fair value.  The carrying value of the equity component at December 31, 2013 and at March 31, 2013 was $822.4 million.  The estimated fair value of the liability component of the debentures at the issuance date was $327.6 million, resulting in a debt discount of $822.4 million.  The unamortized debt discount was $779.5 million at December 31, 2013 and $786.2 million at March 31, 2013.  The carrying value of the debentures was $369.6 million at December 31, 2013 and $363.4 million at March 31, 2013.  The remaining period over which the unamortized debt discount will be recognized as non-cash interest expense is 24 years.  In the three and nine months ended December 31, 2013, the Company recognized $2.3 million and $6.7 million, respectively, in non-cash interest expense related to the amortization of the debt discount.  In the three and nine months ended December 31, 2012, the Company recognized $2.1 million and $6.1 million, respectively, in non-cash interest expense related to the amortization of the debt discount.  The Company recognized $6.1 million and $18.3 million of interest expense related to the 2.125% coupon on the debentures in each of the three and nine-month periods ended December 31, 2013 and December 31, 2012, respectively. |
Credit_facility_Notes
Credit facility (Notes) | 9 Months Ended |
Dec. 31, 2013 | |
Credit Facility [Abstract] | ' |
Credit Facility | ' |
Credit Facility | |
On June 27, 2013, the Company entered into a $2.0 billion credit agreement among the Company, the lenders from time to time that are parties thereto and JPMorgan Chase Bank, N.A., as administrative agent (the Credit Agreement). The Credit Agreement provides for a $350 million term loan and a $1.65 billion revolving credit facility, with a $125 million foreign currency sublimit, a $35 million letter of credit sublimit and a $25 million swingline loan sublimit, terminating on June 27, 2018 (the Maturity Date). The Credit Agreement also contains an increase option permitting the Company, subject to certain requirements, to arrange with existing lenders and/or new lenders for them to provide up to an aggregate of $300 million in additional commitments, which may be for revolving loans or term loans. Proceeds of loans made under the Credit Agreement may be used for working capital and general corporate purposes. The Credit Agreement replaced another credit agreement the Company had in place since August 2011. At December 31, 2013, $650.0 million of borrowings were outstanding under the Credit Agreement consisting of $300.0 million of a revolving line of credit and $350.0 million of a term loan, net of $1.2 million of debt discount resulting from amounts paid to the lenders. | |
The loans under the Credit Agreement bear interest, at the Company's option, at the base rate plus a spread of 0.25% to 1.25% or an adjusted LIBOR rate (based on one, two, three, or six-month interest periods) plus a spread of 1.25% to 2.25%, in each case with such spread being determined based on the consolidated leverage ratio for the preceding four fiscal quarter period. The base rate means the highest of JPMorgan Chase Bank, N.A.'s prime rate, the federal funds rate plus a margin equal to 0.50% and the adjusted LIBOR rate for a 1-month interest period plus a margin equal to 1.00%. Swingline loans accrue interest at a per annum rate based on the base rate plus the applicable margin for base rate loans. Base rate loans may only be made in U.S. dollars. The Company is also obligated to pay other customary administration fees and letter of credit fees for a credit facility of this size and type. | |
Interest is due and payable in arrears quarterly for loans bearing interest at the base rate and at the end of an interest period (or at each three-month interval in the case of loans with interest periods greater than three months) in the case of loans bearing interest at the adjusted LIBOR rate. Interest expense related to the Credit Agreement was approximately $4.1 million in the three months ended December 31, 2013 and $11.5 million in the nine months ended December 31, 2013. Interest expense related to the Company's prior credit agreement was approximately $3.1 million and $6.1 million in the three and nine months ended December 31, 2012, respectively. Principal, together with all accrued and unpaid interest, is due and payable on the Maturity Date. The Company may prepay the loans and terminate the commitments, in whole or in part, at any time without premium or penalty, subject to certain conditions including minimum amounts in the case of commitment reductions and reimbursement of certain costs in the case of prepayments of LIBOR loans. | |
The Company's obligations under the Credit Agreement are guaranteed by certain of its subsidiaries meeting materiality thresholds set forth in the Credit Agreement. To secure the Company's obligations under the Credit Agreement, the Company and its domestic subsidiaries will be required to pledge the equity securities of certain of their respective material subsidiaries, subject to certain exceptions and limitations. | |
The Credit Agreement contains customary affirmative and negative covenants, including covenants that limit or restrict the Company and its subsidiaries' ability to, among other things, incur subsidiary indebtedness, grant liens, merge or consolidate, dispose of assets, make investments, make acquisitions, enter into certain transactions with affiliates, pay dividends or make distributions, repurchase stock, enter into restrictive agreements and enter into sale and leaseback transactions, in each case subject to customary exceptions for a credit facility of this size and type. The Company is also required to maintain compliance with a consolidated leverage ratio and a consolidated interest coverage ratio. At December 31, 2013, the Company was in compliance with these covenants. | |
The Credit Agreement includes customary events of default that include, among other things, non-payment defaults, inaccuracy of representations and warranties, covenant defaults, cross default to material indebtedness, bankruptcy and insolvency defaults, material judgment defaults, ERISA defaults and a change of control default. The occurrence of an event of default could result in the acceleration of the obligations under the Credit Agreement. Under certain circumstances, a default interest rate will apply on all obligations during the existence of an event of default under the Credit Agreement at a per annum rate equal to 2.00% above the applicable interest rate for any overdue principal and 2.00% above the rate applicable for base rate loans for any other overdue amounts. |
Contingencies_Notes
Contingencies (Notes) | 9 Months Ended |
Dec. 31, 2013 | |
Commitments and Contingencies Disclosure [Abstract] | ' |
Contingencies | ' |
Contingencies | |
In the ordinary course of the Company's business, it is 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.  The Company also periodically receives notifications from various third parties alleging infringement of patents, intellectual property rights or other matters.  With respect to pending legal actions to which the Company is a party, although the outcomes of these actions are not generally determinable, the Company believes that the ultimate resolution of these matters will not have a material adverse effect on its financial position, cash flows or results of operations.  Litigation relating to the semiconductor industry is not uncommon, and the Company is, and from time to time has been, subject to such litigation.  No assurances can be given with respect to the extent or outcome of any such litigation in the future. | |
The Company's technology license agreements generally include an indemnification clause that indemnifies the licensee against liability and damages (including legal defense costs) arising from any claims of patent, copyright, trademark or trade secret infringement by the Company's proprietary technology.  The terms of these indemnification provisions approximate the terms of the outgoing technology license agreements, which are typically perpetual unless terminated by either party for breach.  The possible amount of future payments the Company could be required to make based on agreements that specify indemnification limits, if such indemnifications were required on all of these agreements, is approximately $121 million. There are some licensing agreements in place that do not specify indemnification limits.  The Company had not recorded any liabilities related to these indemnification obligations as of December 31, 2013. | |
Contingent liabilities in the amount of $13.0 million were recorded in connection with the Company's April 8, 2010 acquisition of Silicon Storage Technology Inc. (SST) as an adverse outcome was determined to be probable and estimable. One of the contingent liabilities associated with the SST acquisition was resolved in the second quarter of fiscal 2013 with legal settlement costs of approximately $11.5 million for certain legal matters related to SST in excess of previously accrued amounts, which were expensed as special charges in the statement of income. At December 31, 2013, $5.7 million of the original contingent liabilities recorded were still outstanding. |
Derivative_Instruments_Notes
Derivative Instruments (Notes) | 9 Months Ended |
Dec. 31, 2013 | |
Derivative Instruments and Hedging Activities Disclosure [Abstract] | ' |
Derivative Instruments and Hedging Activities Disclosure [Text Block] | ' |
Derivative Instruments | |
The Company has international operations and is thus subject to foreign currency rate fluctuations.  To help manage the risk of changes in foreign currency rates, the Company periodically enters into derivative contracts comprised of foreign currency forward contracts to hedge its asset and liability foreign currency exposure and a portion of its foreign currency operating expenses.  Approximately 99% of the Company's sales are U.S. dollar denominated.  To date, the exposure related to foreign exchange rate volatility has not been material to the Company's operating results.  As of December 31, 2013, the Company had no foreign currency forward contracts outstanding. As of March 31, 2013, the Company had foreign currency forward contracts with notional amounts of $6.0 million to economically hedge certain balance sheet exposures related to the Japanese yen. As these contracts were executed at or near the end of the respective periods, there were no unrecognized gains or losses on these contracts at March 31, 2013. The Company recognized an immaterial amount of net realized gains and losses on foreign currency forward contracts in each of the three and nine months ended December 31, 2013 and 2012. Gains and losses from changes in the fair value of these foreign currency forward contracts are credited or charged to Other Income (Expense). The Company does not apply hedge accounting to its foreign currency derivative instruments. |
Comprehensive_Income_Notes
Comprehensive Income (Notes) | 9 Months Ended | ||||||||||||||||||
Dec. 31, 2013 | |||||||||||||||||||
Other Comprehensive Income (Loss), Net of Tax [Abstract] | ' | ||||||||||||||||||
Comprehensive Income | ' | ||||||||||||||||||
Comprehensive Income | |||||||||||||||||||
The following table presents the changes in the components of accumulated other comprehensive income (AOCI) for the nine months ended December 31, 2013 (amounts in thousands): | |||||||||||||||||||
Unrealized | Minimum | Foreign | Total | ||||||||||||||||
holding gains (losses) | pension | Currency | |||||||||||||||||
available-for-sale securities | liability | ||||||||||||||||||
Balance at March 31, 2013 | $ | 5,444 | $ | 52 | $ | 1,439 | $ | 6,935 | |||||||||||
Other comprehensive loss before reclassifications | (8,011 | ) | — | — | (8,011 | ) | |||||||||||||
Amounts reclassified from accumulated other comprehensive income (loss) | (1,503 | ) | — | — | (1,503 | ) | |||||||||||||
Net other comprehensive loss | (9,514 | ) | — | — | (9,514 | ) | |||||||||||||
Balance at December 31, 2013 | $ | (4,070 | ) | $ | 52 | $ | 1,439 | $ | (2,579 | ) | |||||||||
The table below details where reclassifications of realized transactions out of AOCI are recorded on the Consolidated Statements of Income. | |||||||||||||||||||
Three Months Ended | Nine Months Ended | ||||||||||||||||||
December 31, | December 31, | ||||||||||||||||||
Description of AOCI Component | 2013 | 2012 | 2013 | 2012 | Related Statement | ||||||||||||||
 of Income Line | |||||||||||||||||||
Unrealized gains on available-for-sale securities | $ | 113 | $ | 14 | $ | 2,279 | $ | 235 | Other income | ||||||||||
Taxes | — | — | (776 | ) | (51 | ) | Provision for income taxes | ||||||||||||
Reclassification of realized transactions, net of taxes | $ | 113 | $ | 14 | $ | 1,503 | $ | 184 | Net Income | ||||||||||
ShareBased_Compensation_Notes
Share-Based Compensation (Notes) | 9 Months Ended | ||||||||||||||||
Dec. 31, 2013 | |||||||||||||||||
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ' | ||||||||||||||||
Equity incentive plans | ' | ||||||||||||||||
Share-Based Compensation | |||||||||||||||||
The following table presents the details of the Company's share-based compensation expense (amounts in thousands): | |||||||||||||||||
Three Months Ended | Nine Months Ended | ||||||||||||||||
December 31, | December 31, | ||||||||||||||||
2013 | 2012 | 2013 | 2012 | ||||||||||||||
Cost of sales | $ | 1,841 | (1)Â | $ | 1,834 | (1)Â | $ | 5,674 | (1)Â | $ | 5,758 | (1)Â | |||||
Research and development | 6,141 | 6,172 | 18,762 | 16,562 | |||||||||||||
Selling, general and administrative | 5,737 | 6,114 | 16,939 | 22,339 | |||||||||||||
Pre-tax effect of share-based compensation | 13,719 | 14,120 | 41,375 | 44,659 | |||||||||||||
Income tax benefit | 1,510 | 2,755 | 4,501 | 7,496 | |||||||||||||
Net income effect of share-based compensation | $ | 12,209 | $ | 11,365 | $ | 36,874 | $ | 37,163 | |||||||||
(1) During the three and nine months ended December 31, 2013, $1.9 million and $5.7 million, respectively, of share-based compensation expense was capitalized to inventory and $1.8 million and $5.7 million, respectively, of previously capitalized share-based compensation expenses in inventory was sold.  During the three and nine months ended December 31, 2012, $1.8 million and $5.3 million, respectively, of share-based compensation expense was capitalized to inventory and $1.8 million and $5.8 million, respectively, of previously capitalized share-based compensation expense in inventory was sold. |
Net_income_per_common_share_No
Net income per common share (Notes) | 9 Months Ended | |||||||||||||||
Dec. 31, 2013 | ||||||||||||||||
Earnings Per Share [Abstract] | ' | |||||||||||||||
Net income per common share | ' | |||||||||||||||
Net Income Per Common Share | ||||||||||||||||
The following table sets forth the computation of basic and diluted net income per common share (in thousands, except per share amounts): | ||||||||||||||||
Three Months Ended | Nine Months Ended | |||||||||||||||
December 31, | December 31, | |||||||||||||||
2013 | 2012 | 2013 | 2012 | |||||||||||||
Net income | $ | 105,401 | $ | 10,173 | $ | 283,786 | $ | 67,699 | ||||||||
Weighted average common shares outstanding | 198,759 | 194,958 | 197,845 | 194,157 | ||||||||||||
Dilutive effect of stock options and RSUs | 3,834 | 3,725 | 3,882 | 3,709 | ||||||||||||
Dilutive effect of convertible debt | 16,496 | 5,722 | 14,216 | 6,687 | ||||||||||||
Weighted average common and potential common shares outstanding | 219,089 | 204,405 | 215,943 | 204,553 | ||||||||||||
Basic net income per common share | $ | 0.53 | $ | 0.05 | $ | 1.43 | $ | 0.35 | ||||||||
Diluted net income per common share | $ | 0.48 | $ | 0.05 | $ | 1.31 | $ | 0.33 | ||||||||
Diluted net income per common share for the three and nine months ended December 31, 2013 includes 16,496,384 shares and 14,215,573 shares, respectively, issuable upon the exchange of debentures (see Note 15).  Diluted net income per common share for the three and nine months ended December 31, 2012 includes 5,721,774 and 6,687,078 shares, respectively, issuable upon the exchange of debentures.  The debentures have no impact on diluted net income per common share unless the average price of the Company's common stock exceeds the conversion price because the principal amount of the debentures will be settled in cash upon conversion.  Prior to conversion, the Company will include, in the diluted net income per common share calculation, the effect of the additional shares that may be issued when the Company's common stock price exceeds the conversion price using the treasury stock method.  The weighted average conversion price per share used in calculating the dilutive effect of the convertible debt for the three and nine-month periods ended December 31, 2013 was $26.19 and $26.43, respectively. The weighted average conversion price per share used in calculating the dilutive effect of the convertible debt for the three and nine-month period ended December 31, 2012 was $27.21 and $27.51, respectively. | ||||||||||||||||
Weighted average common shares exclude the effect of option shares which are not dilutive.  There were no antidilutive option shares for the three and nine months ended December 31, 2013. For the three and nine months ended December 31, 2012, the number of option shares that were antidilutive was 124,395 and 110,021, respectively. |
Dividends_Notes
Dividends (Notes) | 9 Months Ended |
Dec. 31, 2013 | |
Dividends [Abstract] | ' |
Dividends [Text Block] | ' |
Dividends | |
A quarterly cash dividend of $0.3545 per share was paid on December 5, 2013 in the aggregate amount of $70.6 million.  Through the first nine months of fiscal 2014, cash dividends of $1.062 per share have been paid in the aggregate of $210.3 million. A quarterly cash dividend of $0.355 per share was declared on January 30, 2014 and will be paid on March 7, 2014 to stockholders of record as of February 21, 2014. The Company expects the March 2014 payment of its quarterly cash dividend to be approximately $70.7 million. |
Reclassification_of_Prior_Peri1
Reclassification of Prior Periods (Tables) | 9 Months Ended | |||||||||||
Dec. 31, 2013 | ||||||||||||
Accounting Changes and Error Corrections [Abstract] | ' | |||||||||||
Schedule of Error Corrections and Prior Period Adjustments | ' | |||||||||||
The effect on net cash provided by operating activities and net cash used in investing activities for the previous period covered by this report are shown below (amounts in thousands): | ||||||||||||
Nine Months Ended | ||||||||||||
31-Dec-12 | ||||||||||||
As reported | Adjustment | As adjusted | ||||||||||
Cash flows from operating activities | ||||||||||||
Amortization of premium on available-for-sale investments | $ | — | $ | 10,304 | $ | 10,304 | ||||||
Net cash provided by operating activities | 321,178 | 10,304 | 331,482 | |||||||||
Cash flows from investing activities | ||||||||||||
Purchases of available-for-sale investments | (646,424 | ) | (10,304 | ) | (656,728 | ) | ||||||
Net cash used in investing activities | (920,807 | ) | (10,304 | ) | (931,111 | ) |
Business_Acquisitions_Tables
Business Acquisitions (Tables) | 9 Months Ended | |||||||||||
Dec. 31, 2013 | ||||||||||||
Business Combinations [Abstract] | ' | |||||||||||
Schedule of Purchase Price Allocation [Table Text Block] | ' | |||||||||||
The table below represents the allocation of the purchase price, including adjustments to the purchase price allocation from the previously reported figures at March 31, 2013, to the net assets acquired based on their estimated fair values as of August 2, 2012. The purchase price allocation was finalized as of August 2, 2013. All adjustments shown in the table below were recorded during the three months ended June 30, 2013 (amounts in thousands): | ||||||||||||
Assets acquired | Previously Reported | Adjustments | 31-Dec-13 | |||||||||
31-Mar-13 | ||||||||||||
Cash and cash equivalents | $ | 180,925 | $ | — | $ | 180,925 | ||||||
Accounts receivable, net | 58,441 | — | 58,441 | |||||||||
Inventories | 86,244 | — | 86,244 | |||||||||
Prepaid expenses | 5,617 | — | 5,617 | |||||||||
Deferred tax assets | 15,843 | — | 15,843 | |||||||||
Other current assets | 17,578 | — | 17,578 | |||||||||
Property, plant and equipment, net | 35,608 | — | 35,608 | |||||||||
Long-term investments | 24,275 | — | 24,275 | |||||||||
Goodwill | 169,065 | (3,473 | ) | 165,592 | ||||||||
Intangible assets, net | 10,214 | — | 10,214 | |||||||||
Purchased intangible assets | 517,800 | — | 517,800 | |||||||||
Other assets | 3,835 | — | 3,835 | |||||||||
Total assets acquired | 1,125,445 | (3,473 | ) | 1,121,972 | ||||||||
Liabilities assumed | ||||||||||||
Accounts payable | (28,035 | ) | — | (28,035 | ) | |||||||
Accrued liabilities | (62,038 | ) | (209 | ) | (62,247 | ) | ||||||
Deferred income on shipments to distributors | (11,376 | ) | — | (11,376 | ) | |||||||
Long-term income tax payable | (72,781 | ) | — | (72,781 | ) | |||||||
Deferred tax liability | (21,079 | ) | 4,397 | (16,682 | ) | |||||||
Other liabilities | (10,535 | ) | (715 | ) | (11,250 | ) | ||||||
Total liabilities assumed | (205,844 | ) | 3,473 | (202,371 | ) | |||||||
Purchase price allocated | $ | 919,601 | $ | — | $ | 919,601 | ||||||
Segment_Information_Tables
Segment Information (Tables) | 9 Months Ended | |||||||||||||||
Dec. 31, 2013 | ||||||||||||||||
Segment Reporting [Abstract] | ' | |||||||||||||||
Revenues and gross profit for each segment | ' | |||||||||||||||
The following table represents net sales and gross profit for each segment for the three and nine months ended December 31, 2013 (amounts in thousands): | ||||||||||||||||
Three Months Ended | Nine Months Ended | |||||||||||||||
December 31, 2013 | December 31, 2013 | |||||||||||||||
Net Sales | Gross Profit | Net Sales | Gross Profit | |||||||||||||
Semiconductor products | $ | 458,298 | $ | 258,646 | $ | 1,366,415 | $ | 766,739 | ||||||||
Technology licensing | 24,074 | 24,074 | 71,418 | 71,418 | ||||||||||||
$ | 482,372 | $ | 282,720 | $ | 1,437,833 | $ | 838,157 | |||||||||
The following table represents net sales and gross profit for each segment for the three and nine months ended December 31, 2012 (amounts in thousands): | ||||||||||||||||
Three Months Ended | Nine Months Ended | |||||||||||||||
December 31, 2012 | December 31, 2012 | |||||||||||||||
Net Sales | Gross Profit | Net Sales | Gross Profit | |||||||||||||
Semiconductor products | $ | 394,709 | $ | 179,090 | $ | 1,089,738 | $ | 537,679 | ||||||||
Technology licensing | 21,338 | 21,338 | 61,741 | 61,741 | ||||||||||||
$ | 416,047 | $ | 200,428 | $ | 1,151,479 | $ | 599,420 | |||||||||
Investments_Tables
Investments (Tables) | 9 Months Ended | |||||||||||||||
Dec. 31, 2013 | ||||||||||||||||
Investments [Abstract] | ' | |||||||||||||||
Summary of available-for-sale securities | ' | |||||||||||||||
The following is a summary of available-for-sale securities at December 31, 2013 (amounts in thousands): | ||||||||||||||||
Available-for-sale Securities | ||||||||||||||||
Adjusted | Gross | Gross | Estimated | |||||||||||||
Cost | Unrealized | Unrealized | Fair Value | |||||||||||||
Gains | Losses | |||||||||||||||
Government agency bonds | $ | 741,492 | $ | 164 | $ | (5,645 | ) | $ | 736,011 | |||||||
Municipal bonds | 51,940 | 20 | (209 | ) | 51,751 | |||||||||||
Auction rate securities | 9,827 | — | — | 9,827 | ||||||||||||
Corporate bonds and debt | 857,038 | 2,858 | (1,258 | ) | 858,638 | |||||||||||
$ | 1,660,297 | $ | 3,042 | $ | (7,112 | ) | $ | 1,656,227 | ||||||||
The following is a summary of available-for-sale and marketable equity securities at March 31, 2013 (amounts in thousands): | ||||||||||||||||
Available-for-sale Securities | ||||||||||||||||
Adjusted | Gross | Gross | Estimated | |||||||||||||
Cost | Unrealized | Unrealized | Fair Value | |||||||||||||
Gains | Losses | |||||||||||||||
Government agency bonds | $ | 558,116 | $ | 335 | $ | (298 | ) | $ | 558,153 | |||||||
Municipal bonds | 25,000 | 146 | (8 | ) | 25,138 | |||||||||||
Auction rate securities | 33,459 | 332 | — | 33,791 | ||||||||||||
Corporate bonds and debt | 680,144 | 5,137 | (159 | ) | 685,122 | |||||||||||
Marketable equity securities | 5,270 | 239 | — | 5,509 | ||||||||||||
$ | 1,301,989 | $ | 6,189 | $ | (465 | ) | $ | 1,307,713 | ||||||||
Summary of amortized cost and estimated fair value of available-for-sale securities, by maturity | ' | |||||||||||||||
The amortized cost and estimated fair value of the available-for-sale securities at December 31, 2013, by contractual maturity, excluding corporate debt of $6.2 million, which has no contractual maturity, are shown below (amounts in thousands).  Expected maturities can differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties, and the Company views its available-for-sale securities as available for current operations. | ||||||||||||||||
Adjusted | Gross | Gross | Estimated | |||||||||||||
Cost | Unrealized | Unrealized | Fair Value | |||||||||||||
Gains | Losses | |||||||||||||||
Available-for-sale | ||||||||||||||||
Due in one year or less | $ | 190,841 | $ | 721 | $ | — | $ | 191,562 | ||||||||
Due after one year and through five years | 1,332,690 | 2,321 | (2,223 | ) | 1,332,788 | |||||||||||
Due after five years and through ten years | 120,749 | — | (4,889 | ) | 115,860 | |||||||||||
Due after ten years | 9,827 | — | — | 9,827 | ||||||||||||
$ | 1,654,107 | $ | 3,042 | $ | (7,112 | ) | $ | 1,650,037 | ||||||||
Fair_Value_Measurements_Tables
Fair Value Measurements (Tables) | 9 Months Ended | ||||||||||||||||
Dec. 31, 2013 | |||||||||||||||||
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract] | ' | ||||||||||||||||
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis | ' | ||||||||||||||||
Assets measured at fair value on a recurring basis at December 31, 2013 are as follows (amounts in thousands): | |||||||||||||||||
Quoted Prices | Significant | Significant | Total | ||||||||||||||
in Active | Other | Unobservable | Balance | ||||||||||||||
Markets for | Observable | Inputs | |||||||||||||||
Identical | Inputs | (Level 3) | |||||||||||||||
Instruments | (Level 2) | ||||||||||||||||
(Level 1) | |||||||||||||||||
Assets | |||||||||||||||||
Money market mutual funds | $ | 114,235 | $ | — | $ | — | $ | 114,235 | |||||||||
Corporate bonds and debt | — | 852,448 | 6,190 | 858,638 | |||||||||||||
Government agency bonds | — | 736,011 | — | 736,011 | |||||||||||||
Deposit accounts | — | 260,865 | — | 260,865 | |||||||||||||
Municipal bonds | — | 51,751 | — | 51,751 | |||||||||||||
Auction rate securities | — | — | 9,827 | 9,827 | |||||||||||||
Total assets measured at fair value | $ | 114,235 | $ | 1,901,075 | $ | 16,017 | $ | 2,031,327 | |||||||||
Assets and liabilities measured at fair value on a recurring basis at March 31, 2013 are as follows (amounts in thousands): | |||||||||||||||||
Quoted Prices | Significant | Significant | Total | ||||||||||||||
in Active | Other | Unobservable | Balance | ||||||||||||||
Markets for Identical Instruments | Observable | Inputs | |||||||||||||||
(Level 1) | Inputs | (Level 3) | |||||||||||||||
(Level 2) | |||||||||||||||||
Assets | |||||||||||||||||
Money market fund deposits | $ | 100,878 | $ | — | $ | — | $ | 100,878 | |||||||||
Marketable equity securities | 5,509 | — | — | 5,509 | |||||||||||||
Corporate bonds and debt | — | 678,932 | 6,190 | 685,122 | |||||||||||||
Government agency bonds | — | 558,153 | — | 558,153 | |||||||||||||
Deposit accounts | — | 427,456 | — | 427,456 | |||||||||||||
Municipal bonds | — | 25,138 | — | 25,138 | |||||||||||||
Auction rate securities | — | — | 33,791 | 33,791 | |||||||||||||
Total assets measured at fair value | $ | 106,387 | $ | 1,689,679 | $ | 39,981 | $ | 1,836,047 | |||||||||
Liabilities | |||||||||||||||||
Contingent consideration | $ | — | $ | — | $ | 19,100 | $ | 19,100 | |||||||||
Total liabilities measured at fair value | $ | — | $ | — | $ | 19,100 | $ | 19,100 | |||||||||
Reconciliation of assets and liabilities measured at fair value on a recurring basis | ' | ||||||||||||||||
The following tables present a reconciliation for all assets and liabilities measured at fair value on a recurring basis, excluding accrued interest components, using significant unobservable inputs (Level 3) for the nine months ended December 31, 2013, and the year ended March 31, 2013 (amounts in thousands): | |||||||||||||||||
Nine months ended December 31, 2013 | Auction Rate | Corporate | Contingent | Total Gains | |||||||||||||
Securities | Debt | Consideration | (Losses) | ||||||||||||||
Balance at March 31, 2013 | $ | 33,791 | $ | 6,190 | $ | (19,100 | ) | $ | — | ||||||||
Total gains (losses) (realized and unrealized): | |||||||||||||||||
Included in earnings | 1,103 | — | (1,370 | ) | (267 | ) | |||||||||||
  Included in other comprehensive income | (332 | ) | — | — | (332 | ) | |||||||||||
Purchases, sales, issuances, and settlements, net | (24,735 | ) | — | 20,470 | — | ||||||||||||
Balance at December 31, 2013 | $ | 9,827 | $ | 6,190 | $ | — | $ | (599 | ) | ||||||||
Year ended March 31, 2013 | Auction Rate | Corporate | Contingent | Total Gains | |||||||||||||
Securities | Debt | Consideration | (Losses) | ||||||||||||||
Balance at March 31, 2012 | $ | 10,246 | $ | 4,625 | $ | — | $ | — | |||||||||
Total gains (losses) (realized and unrealized): | |||||||||||||||||
Included in earnings | (412 | ) | — | (4,400 | ) | $ | (4,813 | ) | |||||||||
  Included in other comprehensive income | 332 | — | — | 332 | |||||||||||||
Purchases, sales, issuances, and settlements, net | (650 | ) | 1,565 | — | — | ||||||||||||
Acquisition-related | 24,275 | — | (14,700 | ) | — | ||||||||||||
Balance at March 31, 2013 | $ | 33,791 | $ | 6,190 | $ | (19,100 | ) | $ | (4,481 | ) | |||||||
Fair Value, by Balance Sheet Grouping | ' | ||||||||||||||||
Assets measured at fair value on a recurring basis are presented/classified on the condensed consolidated balance sheets at December 31, 2013 as follows (amounts in thousands): | |||||||||||||||||
Quoted Prices | Significant | Significant | Total | ||||||||||||||
 in Active | Other | Unobservable | Balance | ||||||||||||||
Markets for | Observable | Inputs | |||||||||||||||
Identical | Inputs | (Level 3) | |||||||||||||||
Instruments | (Level 2) | ||||||||||||||||
(Level 1) | |||||||||||||||||
Assets | |||||||||||||||||
Cash and cash equivalents | $ | 114,235 | $ | 260,865 | $ | — | $ | 375,100 | |||||||||
Short-term investments | — | 932,302 | — | 932,302 | |||||||||||||
Long-term investments | — | 707,908 | 16,017 | 723,925 | |||||||||||||
Total assets measured at fair value | $ | 114,235 | $ | 1,901,075 | $ | 16,017 | $ | 2,031,327 | |||||||||
Assets measured at fair value on a recurring basis are presented/classified in the consolidated balance sheets at March 31, 2013 as follows (amounts in thousands): | |||||||||||||||||
Quoted Prices | Significant | Significant | Total | ||||||||||||||
in Active | Other | Unobservable | Balance | ||||||||||||||
Markets for | Observable | Inputs | |||||||||||||||
Identical | Inputs | Â (Level 3) | |||||||||||||||
Instruments | (Level 2) | ||||||||||||||||
(Level 1) | |||||||||||||||||
Assets | |||||||||||||||||
Cash and cash equivalents | $ | 100,878 | $ | 427,456 | $ | — | $ | 528,334 | |||||||||
Short-term investments | — | 1,050,263 | — | 1,050,263 | |||||||||||||
Long-term investments | 5,509 | 211,960 | 39,981 | 257,450 | |||||||||||||
Total assets measured at fair value | $ | 106,387 | $ | 1,689,679 | $ | 39,981 | $ | 1,836,047 | |||||||||
Accounts_Receivable_Tables
Accounts Receivable (Tables) | 9 Months Ended | |||||||
Dec. 31, 2013 | ||||||||
Accounts Receivable, Net [Abstract] | ' | |||||||
Accounts Receivable Schedule | ' | |||||||
Accounts receivable consists of the following (amounts in thousands): | ||||||||
December 31, 2013 | March 31, 2013 | |||||||
Trade accounts receivable | $ | 224,832 | $ | 230,469 | ||||
Other | 2,102 | 2,250 | ||||||
226,934 | 232,719 | |||||||
Less allowance for doubtful accounts | 2,661 | 2,764 | ||||||
$ | 224,273 | $ | 229,955 | |||||
Inventories_Tables
Inventories (Tables) | 9 Months Ended | |||||||
Dec. 31, 2013 | ||||||||
Inventory, Net [Abstract] | ' | |||||||
Components of inventories | ' | |||||||
The components of inventories consist of the following (amounts in thousands): | ||||||||
December 31, 2013 | March 31, 2013 | |||||||
Raw materials | $ | 9,555 | $ | 9,020 | ||||
Work in process | 187,822 | 181,750 | ||||||
Finished goods | 77,252 | 51,564 | ||||||
$ | 274,629 | $ | 242,334 | |||||
Property_Plant_and_Equipment_T
Property, Plant and Equipment (Tables) | 9 Months Ended | |||||||
Dec. 31, 2013 | ||||||||
Property, Plant and Equipment [Abstract] | ' | |||||||
Property, Plant and Equipment | ' | |||||||
Property, plant and equipment consists of the following (amounts in thousands): | ||||||||
December 31, 2013 | March 31, 2013 | |||||||
Land | $ | 55,601 | $ | 47,102 | ||||
Building and building improvements | 407,520 | 396,611 | ||||||
Machinery and equipment | 1,442,169 | 1,377,814 | ||||||
Projects in process | 62,217 | 76,158 | ||||||
1,967,507 | 1,897,685 | |||||||
Less accumulated depreciation and amortization | 1,446,942 | 1,383,141 | ||||||
$ | 520,565 | $ | 514,544 | |||||
Accrued_Liabilities_Tables
Accrued Liabilities (Tables) | 9 Months Ended | |||||||
Dec. 31, 2013 | ||||||||
Liabilities, Current [Abstract] | ' | |||||||
Accrued liabilities | ' | |||||||
Accrued liabilities consist of the following (amounts in thousands): | ||||||||
December 31, 2013 | March 31, 2013 | |||||||
Acquisition related contingent consideration | $ | — | $ | 19,100 | ||||
Other accrued expenses | 96,176 | 108,008 | ||||||
$ | 96,176 | $ | 127,108 | |||||
Comprehensive_Income_Tables
Comprehensive Income (Tables) | 9 Months Ended | ||||||||||||||||||
Dec. 31, 2013 | |||||||||||||||||||
Other Comprehensive Income (Loss), Net of Tax [Abstract] | ' | ||||||||||||||||||
Schedule of Accumulated Other Comprehensive Income (Loss) | ' | ||||||||||||||||||
The following table presents the changes in the components of accumulated other comprehensive income (AOCI) for the nine months ended December 31, 2013 (amounts in thousands): | |||||||||||||||||||
Unrealized | Minimum | Foreign | Total | ||||||||||||||||
holding gains (losses) | pension | Currency | |||||||||||||||||
available-for-sale securities | liability | ||||||||||||||||||
Balance at March 31, 2013 | $ | 5,444 | $ | 52 | $ | 1,439 | $ | 6,935 | |||||||||||
Other comprehensive loss before reclassifications | (8,011 | ) | — | — | (8,011 | ) | |||||||||||||
Amounts reclassified from accumulated other comprehensive income (loss) | (1,503 | ) | — | — | (1,503 | ) | |||||||||||||
Net other comprehensive loss | (9,514 | ) | — | — | (9,514 | ) | |||||||||||||
Balance at December 31, 2013 | $ | (4,070 | ) | $ | 52 | $ | 1,439 | $ | (2,579 | ) | |||||||||
Reclassification out of Accumulated Other Comprehensive Income | ' | ||||||||||||||||||
The table below details where reclassifications of realized transactions out of AOCI are recorded on the Consolidated Statements of Income. | |||||||||||||||||||
Three Months Ended | Nine Months Ended | ||||||||||||||||||
December 31, | December 31, | ||||||||||||||||||
Description of AOCI Component | 2013 | 2012 | 2013 | 2012 | Related Statement | ||||||||||||||
 of Income Line | |||||||||||||||||||
Unrealized gains on available-for-sale securities | $ | 113 | $ | 14 | $ | 2,279 | $ | 235 | Other income | ||||||||||
Taxes | — | — | (776 | ) | (51 | ) | Provision for income taxes | ||||||||||||
Reclassification of realized transactions, net of taxes | $ | 113 | $ | 14 | $ | 1,503 | $ | 184 | Net Income | ||||||||||
ShareBased_Compensation_Tables
Share-Based Compensation (Tables) | 9 Months Ended | ||||||||||||||||
Dec. 31, 2013 | |||||||||||||||||
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ' | ||||||||||||||||
Share-based compensation expense | ' | ||||||||||||||||
The following table presents the details of the Company's share-based compensation expense (amounts in thousands): | |||||||||||||||||
Three Months Ended | Nine Months Ended | ||||||||||||||||
December 31, | December 31, | ||||||||||||||||
2013 | 2012 | 2013 | 2012 | ||||||||||||||
Cost of sales | $ | 1,841 | (1)Â | $ | 1,834 | (1)Â | $ | 5,674 | (1)Â | $ | 5,758 | (1)Â | |||||
Research and development | 6,141 | 6,172 | 18,762 | 16,562 | |||||||||||||
Selling, general and administrative | 5,737 | 6,114 | 16,939 | 22,339 | |||||||||||||
Pre-tax effect of share-based compensation | 13,719 | 14,120 | 41,375 | 44,659 | |||||||||||||
Income tax benefit | 1,510 | 2,755 | 4,501 | 7,496 | |||||||||||||
Net income effect of share-based compensation | $ | 12,209 | $ | 11,365 | $ | 36,874 | $ | 37,163 | |||||||||
Net_income_per_common_share_Ta
Net income per common share (Tables) | 9 Months Ended | |||||||||||||||
Dec. 31, 2013 | ||||||||||||||||
Earnings Per Share [Abstract] | ' | |||||||||||||||
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | ' | |||||||||||||||
The following table sets forth the computation of basic and diluted net income per common share (in thousands, except per share amounts): | ||||||||||||||||
Three Months Ended | Nine Months Ended | |||||||||||||||
December 31, | December 31, | |||||||||||||||
2013 | 2012 | 2013 | 2012 | |||||||||||||
Net income | $ | 105,401 | $ | 10,173 | $ | 283,786 | $ | 67,699 | ||||||||
Weighted average common shares outstanding | 198,759 | 194,958 | 197,845 | 194,157 | ||||||||||||
Dilutive effect of stock options and RSUs | 3,834 | 3,725 | 3,882 | 3,709 | ||||||||||||
Dilutive effect of convertible debt | 16,496 | 5,722 | 14,216 | 6,687 | ||||||||||||
Weighted average common and potential common shares outstanding | 219,089 | 204,405 | 215,943 | 204,553 | ||||||||||||
Basic net income per common share | $ | 0.53 | $ | 0.05 | $ | 1.43 | $ | 0.35 | ||||||||
Diluted net income per common share | $ | 0.48 | $ | 0.05 | $ | 1.31 | $ | 0.33 | ||||||||
Basis_of_Presentation_Details
Basis of Presentation (Details) | Dec. 31, 2013 |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] | ' |
Percentage Of Outstanding Stock Of All Subsidiaries Owned | 100.00% |
Reclassification_of_Prior_Peri2
Reclassification of Prior Periods (Details) (USD $) | 9 Months Ended | |
In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 |
Cash flows from operating activities | ' | ' |
Amortization of premium on available-for-sale investments | $8,067 | $10,304 |
Net cash provided by operating activities | 473,223 | 331,482 |
Cash flows from investing activities | ' | ' |
Purchases of available-for-sale investments | -950,560 | -656,728 |
Net cash used in investing activities | -448,359 | -931,111 |
As reported | ' | ' |
Cash flows from operating activities | ' | ' |
Amortization of premium on available-for-sale investments | ' | 0 |
Net cash provided by operating activities | ' | 321,178 |
Cash flows from investing activities | ' | ' |
Purchases of available-for-sale investments | ' | -646,424 |
Net cash used in investing activities | ' | -920,807 |
Adjustment | ' | ' |
Cash flows from operating activities | ' | ' |
Amortization of premium on available-for-sale investments | ' | 10,304 |
Net cash provided by operating activities | ' | 10,304 |
Cash flows from investing activities | ' | ' |
Purchases of available-for-sale investments | ' | -10,304 |
Net cash used in investing activities | ' | ($10,304) |
Business_Acquisitions_Details
Business Acquisitions (Details) (USD $) | 9 Months Ended | 0 Months Ended | 9 Months Ended | 9 Months Ended | |||||
Dec. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2013 | Nov. 23, 2013 | Dec. 31, 2013 | Nov. 21, 2013 | Nov. 20, 2013 | Dec. 31, 2013 | Mar. 31, 2013 | |
Eqcologic Acquisition [Member] | Eqcologic Acquisition [Member] | Eqcologic Acquisition [Member] | Eqcologic Acquisition [Member] | SMSC Acquisition [Member] | SMSC Acquisition [Member] | ||||
Business Acquisition [Line Items] | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Business Acquisition, Effective Date of Acquisition | ' | ' | ' | ' | 21-Nov-13 | ' | ' | 2-Aug-12 | ' |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage | ' | ' | ' | ' | ' | ' | 18.30% | ' | ' |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain | $2,438,000 | $0 | ' | $2,438,000 | ' | ' | ' | ' | ' |
Business Acquisition, Percentage of Voting Interests Acquired | ' | ' | ' | ' | ' | 81.70% | ' | ' | ' |
Business Combination, Consideration Transferred | ' | ' | ' | ' | ' | 9,000,000 | ' | ' | ' |
Weighted average useful life of finite lived intangible assets (in years) | ' | ' | ' | ' | '8 years | ' | ' | ' | ' |
Business Acquisition, Purchase Price Allocation [Abstract] | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Cash and cash equivalents | ' | ' | ' | ' | ' | ' | ' | 180,925,000 | 180,925,000 |
Accounts recevable, net | ' | ' | ' | ' | ' | ' | ' | 58,441,000 | 58,441,000 |
Inventories | ' | ' | ' | ' | ' | ' | ' | 86,244,000 | 86,244,000 |
Prepaid expenses | ' | ' | ' | ' | ' | ' | ' | 5,617,000 | 5,617,000 |
Deferred tax assets | ' | ' | ' | ' | ' | ' | ' | 15,843,000 | 15,843,000 |
Other current assets | ' | ' | ' | ' | ' | ' | ' | 17,578,000 | 17,578,000 |
Property, plant and equipment, net | ' | ' | ' | ' | ' | ' | ' | 35,608,000 | 35,608,000 |
Long-term investments | ' | ' | ' | ' | ' | ' | ' | 24,275,000 | 24,275,000 |
Goodwill | ' | ' | ' | ' | ' | 6,400,000 | ' | 165,592,000 | 169,065,000 |
Intangible assets, net | ' | ' | ' | ' | ' | ' | ' | 10,214,000 | 10,214,000 |
Purchased intangible assets | ' | ' | ' | ' | ' | 4,100,000 | ' | 517,800,000 | 517,800,000 |
Other assets | ' | ' | ' | ' | ' | ' | ' | 3,835,000 | 3,835,000 |
Total assets acquired | ' | ' | ' | ' | ' | ' | ' | 1,121,972,000 | 1,125,445,000 |
Accounts payable | ' | ' | ' | ' | ' | ' | ' | -28,035,000 | -28,035,000 |
Accrued liabilities | ' | ' | ' | ' | ' | ' | ' | -62,247,000 | -62,038,000 |
Deferred income on shipments to distributors | ' | ' | ' | ' | ' | ' | ' | -11,376,000 | -11,376,000 |
Long-term income tax payable | ' | ' | ' | ' | ' | ' | ' | -72,781,000 | -72,781,000 |
Deferred tax liability | ' | ' | ' | ' | ' | ' | ' | -16,682,000 | -21,079,000 |
Other liabilities | ' | ' | ' | ' | ' | ' | ' | -11,250,000 | -10,535,000 |
Contingent consideration | 0 | ' | 19,100,000 | ' | ' | ' | ' | ' | ' |
Total liabilities assumed | ' | ' | ' | ' | ' | ' | ' | -202,371,000 | -205,844,000 |
Purchase price allocated | ' | ' | ' | ' | ' | ' | ' | 919,601,000 | 919,601,000 |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract] | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Goodwill | ' | ' | ' | ' | ' | ' | ' | -3,473,000 | ' |
Total assets acquired | ' | ' | ' | ' | ' | ' | ' | -3,473,000 | ' |
Accrued liabilities | ' | ' | ' | ' | ' | ' | ' | -209,000 | ' |
Deferred tax liabilty | ' | ' | ' | ' | ' | ' | ' | 4,397,000 | ' |
Other liabilities | ' | ' | ' | ' | ' | ' | ' | -715,000 | ' |
Total liabilities assumed | ' | ' | ' | ' | ' | ' | ' | ($3,473,000) | ' |
Special_Charges_Details
Special Charges (Details) (Unusual or Infrequent Item [Member], USD $) | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |
In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2012 | Sep. 30, 2012 | Dec. 31, 2012 |
SMSC Acquisition [Member] | SMSC Acquisition [Member] | SST acquisition [Member] | SST acquisition [Member] | |||
Unusual or Infrequent Item [Line Items] | ' | ' | ' | ' | ' | ' |
Severance-Related, Office Closing Costs and Other Restructuring Costs | $0.80 | $2.50 | $2.60 | $13.40 | ' | ' |
Legal settlement costs | ' | ' | ' | ' | $11.50 | $11.50 |
Segment_Information_Details
Segment Information (Details) (USD $) | 3 Months Ended | 9 Months Ended | ||
In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 |
Segment reporting information [Line Items] | ' | ' | ' | ' |
Net sales | $482,372 | $416,047 | $1,437,833 | $1,151,479 |
Gross Profit | 282,720 | 200,428 | 838,157 | 599,420 |
Semiconductor products [Member] | ' | ' | ' | ' |
Segment reporting information [Line Items] | ' | ' | ' | ' |
Net sales | 458,298 | 394,709 | 1,366,415 | 1,089,738 |
Gross Profit | 258,646 | 179,090 | 766,739 | 537,679 |
Technology licensing [Member] | ' | ' | ' | ' |
Segment reporting information [Line Items] | ' | ' | ' | ' |
Net sales | 24,074 | 21,338 | 71,418 | 61,741 |
Gross Profit | $24,074 | $21,338 | $71,418 | $61,741 |
Summary_of_Available_for_Sale_
Summary of Available for Sale (Details) (USD $) | Dec. 31, 2013 | Mar. 31, 2013 |
In Thousands, unless otherwise specified | ||
Summary of available-for-sale securities [Line Items] | ' | ' |
Available-for-sale, adjusted cost | $1,660,297 | $1,301,989 |
Available-for-sale, gross unrealized gains | 3,042 | 6,189 |
Available-for-sale, gross unrealized losses | -7,112 | -465 |
Available-for-sale, estimated fair value | 1,656,227 | 1,307,713 |
Government agency bonds [Member] | ' | ' |
Summary of available-for-sale securities [Line Items] | ' | ' |
Available-for-sale, adjusted cost | 741,492 | 558,116 |
Available-for-sale, gross unrealized gains | 164 | 335 |
Available-for-sale, gross unrealized losses | -5,645 | -298 |
Available-for-sale, estimated fair value | 736,011 | 558,153 |
Municipal bonds [Member] | ' | ' |
Summary of available-for-sale securities [Line Items] | ' | ' |
Available-for-sale, adjusted cost | 51,940 | 25,000 |
Available-for-sale, gross unrealized gains | 20 | 146 |
Available-for-sale, gross unrealized losses | -209 | -8 |
Available-for-sale, estimated fair value | 51,751 | 25,138 |
Auction rate securities [Member] | ' | ' |
Summary of available-for-sale securities [Line Items] | ' | ' |
Available-for-sale, adjusted cost | 9,827 | 33,459 |
Available-for-sale, gross unrealized gains | 0 | 332 |
Available-for-sale, gross unrealized losses | 0 | 0 |
Available-for-sale, estimated fair value | 9,827 | 33,791 |
Corporate bonds and debt [Member] | ' | ' |
Summary of available-for-sale securities [Line Items] | ' | ' |
Available-for-sale, adjusted cost | 857,038 | 680,144 |
Available-for-sale, gross unrealized gains | 2,858 | 5,137 |
Available-for-sale, gross unrealized losses | -1,258 | -159 |
Available-for-sale, estimated fair value | 858,638 | 685,122 |
Equity Securities [Member] | ' | ' |
Summary of available-for-sale securities [Line Items] | ' | ' |
Available-for-sale, adjusted cost | ' | 5,270 |
Available-for-sale, gross unrealized gains | ' | 239 |
Available-for-sale, gross unrealized losses | ' | 0 |
Available-for-sale, estimated fair value | ' | $5,509 |
Investments_AFS_Details
Investments AFS (Details) (USD $) | Dec. 31, 2013 | Mar. 31, 2013 |
Investments [Abstract] | ' | ' |
Amount of short-term investments | $932,302,000 | $1,050,263,000 |
Amount of long-term investments | 723,925,000 | 257,450,000 |
Amount of corporate debt securities with no contractual maturity excluded from estimated fair value of available-for-sale securities | $6,200,000 | ' |
AFS_Debt_Maturities_Details
AFS, Debt Maturities (Details) (USD $) | Dec. 31, 2013 | Mar. 31, 2013 |
In Thousands, unless otherwise specified | ||
Schedule of available-for-sale securities, debt maturities [Line Items] | ' | ' |
Available-for-sale, adjusted cost | $1,660,297 | $1,301,989 |
Available-for-sale, gross unrealized gains | 3,042 | 6,189 |
Available-for-sale, gross unrealized losses | -7,112 | -465 |
Available-for-sale, estimated fair value | 1,656,227 | 1,307,713 |
Total maturities [Member] | ' | ' |
Schedule of available-for-sale securities, debt maturities [Line Items] | ' | ' |
Available-for-sale, adjusted cost | 1,654,107 | ' |
Available-for-sale, gross unrealized gains | 3,042 | ' |
Available-for-sale, gross unrealized losses | -7,112 | ' |
Available-for-sale, estimated fair value | 1,650,037 | ' |
Due in one year or less [Member] | ' | ' |
Schedule of available-for-sale securities, debt maturities [Line Items] | ' | ' |
Available-for-sale, adjusted cost | 190,841 | ' |
Available-for-sale, gross unrealized gains | 721 | ' |
Available-for-sale, gross unrealized losses | 0 | ' |
Available-for-sale, estimated fair value | 191,562 | ' |
Due after one year and through five years [Member] | ' | ' |
Schedule of available-for-sale securities, debt maturities [Line Items] | ' | ' |
Available-for-sale, adjusted cost | 1,332,690 | ' |
Available-for-sale, gross unrealized gains | 2,321 | ' |
Available-for-sale, gross unrealized losses | -2,223 | ' |
Available-for-sale, estimated fair value | 1,332,788 | ' |
Due after five years and through ten years [Member] | ' | ' |
Schedule of available-for-sale securities, debt maturities [Line Items] | ' | ' |
Available-for-sale, adjusted cost | 120,749 | ' |
Available-for-sale, gross unrealized gains | 0 | ' |
Available-for-sale, gross unrealized losses | -4,889 | ' |
Available-for-sale, estimated fair value | 115,860 | ' |
Due after ten years [Member] | ' | ' |
Schedule of available-for-sale securities, debt maturities [Line Items] | ' | ' |
Available-for-sale, adjusted cost | 9,827 | ' |
Available-for-sale, gross unrealized gains | 0 | ' |
Available-for-sale, gross unrealized losses | 0 | ' |
Available-for-sale, estimated fair value | $9,827 | ' |
Measured_on_Recurring_Basis_De
Measured on Recurring Basis (Details) (USD $) | Dec. 31, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Mar. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2013 | Mar. 31, 2013 | Mar. 31, 2013 | Dec. 31, 2013 | Mar. 31, 2013 | Dec. 31, 2013 | Mar. 31, 2013 | Dec. 31, 2013 | Mar. 31, 2013 |
Insurance Sector Auction Rate Securities [Member] | Insurance Sector Auction Rate Securities [Member] | Insurance Sector Auction Rate Securities [Member] | Insurance Sector Auction Rate Securities [Member] | Energy And Telecommunications Sector Insurance Sector Auction Rate Securities [Member] | Student Loan Auction Rate Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Inputs, Level 3 [Member] | |||||
Minimum [Member] | Maximum [Member] | |||||||||||||||
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Money Market Fund Deposits Fair Value Disclosure | $114,235,000 | $100,878,000 | ' | ' | ' | ' | ' | ' | ' | ' | $114,235,000 | $100,878,000 | $0 | $0 | $0 | $0 |
Marketable Equity Securities Fair Value Disclosure | ' | 5,509,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | 5,509,000 | ' | 0 | ' | 0 |
Corporate Bonds and Debt Fair Value Disclosure | 858,638,000 | 685,122,000 | ' | ' | ' | ' | ' | ' | ' | ' | 0 | 0 | 852,448,000 | 678,932,000 | 6,190,000 | 6,190,000 |
Government Agency Bonds Fair Value Disclosure | 736,011,000 | 558,153,000 | ' | ' | ' | ' | ' | ' | ' | ' | 0 | 0 | 736,011,000 | 558,153,000 | 0 | 0 |
Cash Deposit Accounts Fair Value Disclosure | 260,865,000 | 427,456,000 | ' | ' | ' | ' | ' | ' | ' | ' | 0 | 0 | 260,865,000 | 427,456,000 | 0 | 0 |
Municipal Bonds Fair Value Disclosure | 51,751,000 | 25,138,000 | ' | ' | ' | ' | ' | ' | ' | ' | 0 | 0 | 51,751,000 | 25,138,000 | 0 | 0 |
Auction Rate Securities Fair Value Disclosure | 9,827,000 | 33,791,000 | ' | ' | ' | ' | ' | ' | ' | ' | 0 | 0 | 0 | 0 | 9,827,000 | 33,791,000 |
Contingent consideration | 0 | 19,100,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | 0 | ' | 0 | ' | 19,100,000 |
Fair Value, Assets and Liabilities, as Classified on the Condensed Consolidated Balance Sheets [Abstract] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Cash and cash equivalents | 375,100,000 | 528,334,000 | 465,293,000 | 635,755,000 | ' | ' | ' | ' | ' | ' | 114,235,000 | 100,878,000 | 260,865,000 | 427,456,000 | 0 | 0 |
Short-term investments | 932,302,000 | 1,050,263,000 | ' | ' | ' | ' | ' | ' | ' | ' | 0 | 0 | 932,302,000 | 1,050,263,000 | 0 | 0 |
Long-term investments | 723,925,000 | 257,450,000 | ' | ' | ' | ' | ' | ' | ' | ' | 0 | 5,509,000 | 707,908,000 | 211,960,000 | 16,017,000 | 39,981,000 |
Total assets measured at fair value | 2,031,327,000 | 1,836,047,000 | ' | ' | ' | ' | ' | ' | ' | ' | 114,235,000 | 106,387,000 | 1,901,075,000 | 1,689,679,000 | 16,017,000 | 39,981,000 |
Liabilities, Fair Value Disclosure | ' | 19,100,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | 0 | ' | 0 | ' | 19,100,000 |
Available-for-sale Securities, Other Disclosure Items [Abstract] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Value of auction rate securities for which recent auctions were unsuccessful | ' | ' | ' | ' | $9,800,000 | $9,800,000 | ' | ' | $5,300,000 | $18,700,000 | ' | ' | ' | ' | ' | ' |
Discount rate | ' | ' | ' | ' | ' | ' | 2.00% | 2.50% | ' | ' | ' | ' | ' | ' | ' | ' |
Liquidity risk premium (percentage) | ' | ' | ' | ' | ' | ' | 9.10% | 29.50% | ' | ' | ' | ' | ' | ' | ' | ' |
Anticipated liquidity horizon | ' | ' | ' | ' | ' | ' | '7 years | '10 years | ' | ' | ' | ' | ' | ' | ' | ' |
Unobservable_Input_Reconciliat
Unobservable Input Reconciliation Assets (Details) (USD $) | 9 Months Ended | 12 Months Ended |
In Thousands, unless otherwise specified | Dec. 31, 2013 | Mar. 31, 2013 |
Fair value, assets measured on recurring basis, unobservable input reconciliation [Line Items] | ' | ' |
Total Gains (Losses) | ($599) | ($4,481) |
Auction rate securities [Member] | ' | ' |
Fair value, assets measured on recurring basis, unobservable input reconciliation [Line Items] | ' | ' |
Fair value, measurement with unobservable inputs reconciliation, beginning | 33,791 | 10,246 |
Included in earnings | 1,103 | -412 |
Included in other comprehensive income (loss) | -332 | 332 |
Purchases, sales, issuances, and settlements, net | -24,735 | -650 |
Acquisition-related | ' | 24,275 |
Fair value, measurement with unobservable inputs reconciliation, ending | 9,827 | 33,791 |
Corporate Debt [Member] | ' | ' |
Fair value, assets measured on recurring basis, unobservable input reconciliation [Line Items] | ' | ' |
Fair value, measurement with unobservable inputs reconciliation, beginning | 6,190 | 4,625 |
Included in earnings | 0 | 0 |
Included in other comprehensive income (loss) | 0 | 0 |
Purchases, sales, issuances, and settlements, net | 0 | 1,565 |
Acquisition-related | ' | 0 |
Fair value, measurement with unobservable inputs reconciliation, ending | 6,190 | 6,190 |
Total Gains (Losses) [Member] | ' | ' |
Fair value, assets measured on recurring basis, unobservable input reconciliation [Line Items] | ' | ' |
Included in earnings | -267 | -4,813 |
Included in other comprehensive income (loss) | -332 | 332 |
Purchases, sales, issuances, and settlements, net | 'Â Â | 'Â Â |
Acquisition-related | ' | $0 |
Unobservable_Input_Reconciliat1
Unobservable Input Reconciliation Liabilities (Details) (Contingent consideration [Member], USD $) | 9 Months Ended | 12 Months Ended |
In Thousands, unless otherwise specified | Dec. 31, 2013 | Mar. 31, 2013 |
Contingent consideration [Member] | ' | ' |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ' | ' |
Fair value, measurements with unobservable inputs reconciliation, beginning | $19,100 | $0 |
Included in earnings | -1,370 | -4,400 |
Purchases, sales, issuances, and settlements, net | -20,470 | ' |
Acquisition-related | ' | 14,700 |
Fair value, measurements with unobservable inputs reconciliation, ending | $0 | $19,100 |
Assets_Not_Recorded_at_Fair_Va
Assets Not Recorded at Fair Value on a Recurring Basis (Details) (USD $) | 3 Months Ended |
Dec. 31, 2012 | |
Investments Not Recorded at Fair Value on a Recurring Basis [Abstract] | ' |
Cost-method Investments, Other than Temporary Impairment | $500,000 |
Fair_Value_of_Financial_Instru1
Fair Value of Financial Instruments (Details) (USD $) | Dec. 31, 2013 | Mar. 31, 2013 |
In Millions, unless otherwise specified | ||
Fair Value Disclosures [Abstract] | ' | ' |
Fair value of junior subordinated convertible debentures based on the trading price of the bonds | $1,987 | $1,639 |
Accounts_Receivable_Details
Accounts Receivable (Details) (USD $) | Dec. 31, 2013 | Mar. 31, 2013 |
In Thousands, unless otherwise specified | ||
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | ' |
Receivable amounts | $226,934 | $232,719 |
Less allowance for doubtful accounts | 2,661 | 2,764 |
Accounts receivable, net | 224,273 | 229,955 |
Trade Accounts Receivable [Member] | ' | ' |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | ' |
Receivable amounts | 224,832 | 230,469 |
Other Receivables [Member] | ' | ' |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | ' |
Receivable amounts | $2,102 | $2,250 |
Inventories_Details
Inventories (Details) (USD $) | Dec. 31, 2013 | Mar. 31, 2013 |
In Thousands, unless otherwise specified | ||
Inventory, Net [Abstract] | ' | ' |
Raw materials | $9,555 | $9,020 |
Work in process | 187,822 | 181,750 |
Finished goods | 77,252 | 51,564 |
Inventory, Net | $274,629 | $242,334 |
Property_Plant_and_Equipment_D
Property, Plant and Equipment (Details) (USD $) | 3 Months Ended | 9 Months Ended | |||
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2013 | |
Property, Plant and Equipment [Line Items] | ' | ' | ' | ' | ' |
Property, plant, and equipment costs | $1,967,507,000 | ' | $1,967,507,000 | ' | $1,897,685,000 |
Accumulated depreciation | 1,446,942,000 | ' | 1,446,942,000 | ' | 1,383,141,000 |
Property, plant and equipment, net | 520,565,000 | ' | 520,565,000 | ' | 514,544,000 |
Depreciation expense | 22,200,000 | 23,000,000 | 66,700,000 | 66,000,000 | ' |
Land [Member] | ' | ' | ' | ' | ' |
Property, Plant and Equipment [Line Items] | ' | ' | ' | ' | ' |
Property, plant, and equipment costs | 55,601,000 | ' | 55,601,000 | ' | 47,102,000 |
Buildings and building improvements [Member] | ' | ' | ' | ' | ' |
Property, Plant and Equipment [Line Items] | ' | ' | ' | ' | ' |
Property, plant, and equipment costs | 407,520,000 | ' | 407,520,000 | ' | 396,611,000 |
Machinery and equipment [Member] | ' | ' | ' | ' | ' |
Property, Plant and Equipment [Line Items] | ' | ' | ' | ' | ' |
Property, plant, and equipment costs | 1,442,169,000 | ' | 1,442,169,000 | ' | 1,377,814,000 |
Projects in progress [Member] | ' | ' | ' | ' | ' |
Property, Plant and Equipment [Line Items] | ' | ' | ' | ' | ' |
Property, plant, and equipment costs | $62,217,000 | ' | $62,217,000 | ' | $76,158,000 |
Accrued_Liabilities_Details
Accrued Liabilities (Details) (USD $) | Dec. 31, 2013 | Mar. 31, 2013 |
In Thousands, unless otherwise specified | ||
Liabilities, Current [Abstract] | ' | ' |
Acquisition related contingent consideration | $0 | $19,100 |
Other accrued expenses | 96,176 | 108,008 |
Accrued Liabilities, Current | $96,176 | $127,108 |
Income_tax_Details
Income tax (Details) (USD $) | 3 Months Ended | 9 Months Ended | |
In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2013 | Dec. 31, 2012 |
Income Tax Disclosure [Abstract] | ' | ' | ' |
Effective Income Tax Rate | ' | 9.70% | 34.10% |
Tax Adjustments, Settlements, and Unusual Provisions | $6.20 | ' | ' |
Unrecognized Tax Benefits | 179.2 | 179.2 | ' |
Unrecognized Tax Benefits, Period Increase (Decrease) | ' | $3.50 | ' |
2125_Junior_subordinated_conve1
2.125% Junior subordinated convertible debentures (Details) (USD $) | 3 Months Ended | 9 Months Ended | |||
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2013 | |
Debt Instrument [Line Items] | ' | ' | ' | ' | ' |
Carrying value of debentures | $369,618,000 | ' | $369,618,000 | ' | $363,385,000 |
Amortization of Debt Discount (Premium) | 2,300,000 | 2,100,000 | 6,682,000 | 6,106,000 | ' |
Junior subordinated convertible debentures due 2037 [Member] | ' | ' | ' | ' | ' |
Debt Instrument [Line Items] | ' | ' | ' | ' | ' |
Principal amount of junior subordinated convertible debentures | 1,150,000,000 | ' | 1,150,000,000 | ' | ' |
Interest rate of junior subordinated convertible debentures | 2.13% | ' | 2.13% | ' | ' |
Due date of junior subordinated convertible debentures | ' | ' | 15-Dec-37 | ' | ' |
Conversion rate, in shares, of junior subordinated convertible debt (in shares per $1,000) | ' | ' | 29.2783 | ' | ' |
Principal amount of junior subordinated convertible debentures used as conversion unit | ' | ' | 1,000 | ' | ' |
Convertible Debt Instrument Initial Conversion Price Per Share | $34.16 | ' | $34.16 | ' | ' |
Debt Instrument, Convertible, Conversion Ratio | ' | ' | 38.3572 | ' | ' |
Debt Instrument, Convertible, Conversion Price | $26.07 | ' | $26.07 | ' | ' |
Carrying value of equity component of the debentures that were bifurcated into a liability and equity component | 822,400,000 | ' | 822,400,000 | ' | 822,400,000 |
Estimated fair value of liability component of debentures at issuance date | 327,600,000 | ' | 327,600,000 | ' | ' |
Debt discount of estimated fair value of liability component of debentures | 822,400,000 | ' | 822,400,000 | ' | ' |
Amount of unamortized debt discount of debentures | 779,500,000 | ' | 779,500,000 | ' | 786,200,000 |
Remaining period, in years, over which unamortized debt discount will be recognized as non-cash interest expense (in years) | ' | ' | '24 years | ' | ' |
Recognized amount of interest expense related to debentures | $6,100,000 | $6,100,000 | $18,300,000 | $18,300,000 | ' |
Credit_facility_Details
Credit facility (Details) (USD $) | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 9 Months Ended | 9 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | |||||||||||||||||
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2013 | Jun. 27, 2013 | Dec. 31, 2013 | Jun. 27, 2013 | Dec. 31, 2013 | Jun. 27, 2013 | Jun. 27, 2013 | Jun. 27, 2013 | Dec. 31, 2013 | Jun. 27, 2013 | Jun. 27, 2013 | Jun. 27, 2013 | Jun. 27, 2013 | Jun. 27, 2013 | Jun. 27, 2013 | Dec. 31, 2013 | Jun. 27, 2013 | Dec. 31, 2013 | Jun. 27, 2013 | Dec. 31, 2012 | Dec. 31, 2012 | |
Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit Agreement Maturity June 27, 2018 [Member] | Credit agreement Maturity August 12, 2016 [Member] | Credit agreement Maturity August 12, 2016 [Member] | |||||
Line of Credit [Member] | Line of Credit [Member] | Line of Credit [Member] | Line of Credit [Member] | Line of Credit [Member] | Line of Credit [Member] | Line of Credit [Member] | Line of Credit [Member] | Line of Credit [Member] | Line of Credit [Member] | Line of Credit Facility Foreign Currency Sublimit [Member] | Line of Credit Facility Letter of Credit Sublimit [Member] | Line of Credit Facility Swingline Loan Sublimit [Member] | Term loan [Member] | Term loan [Member] | Revolving credit facility [Member] | Revolving credit facility [Member] | ||||||||||
Debt Instrument Interest Rate Option1 [Member] | Debt Instrument Interest Rate Option1 [Member] | Debt Instrument Interest Rate Option1 [Member] | Debt Instrument Interest Rate Option1 [Member] | Debt Instrument Interest Rate Option 2 [Member] | Debt Instrument Interest Rate Option 2 [Member] | Debt Instrument Interest Rate Option 2 [Member] | Debt Instrument Interest Rate Option 2 [Member] | |||||||||||||||||||
Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | |||||||||||||||||||||||
Line of Credit Facility [Line Items] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Initiation date | ' | ' | ' | ' | ' | 27-Jun-13 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Credit agreement | ' | ' | ' | ' | ' | ' | $2,000,000,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | $125,000,000 | $35,000,000 | $25,000,000 | ' | $350,000,000 | ' | $1,650,000,000 | ' | ' |
Borrowings outstanding under the Credit Agreement | ' | ' | ' | ' | 650,000,000 | 650,000,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 350,000,000 | ' | 300,000,000 | ' | ' | ' |
Maturity Date | ' | ' | ' | ' | ' | 27-Jun-18 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Increase option amount | ' | ' | ' | ' | ' | ' | 300,000,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Debt discount | ' | ' | ' | ' | 1,200,000 | 1,200,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Spread on variable rate (percentage) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 0.25% | 1.25% | ' | ' | 1.25% | 2.25% | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Description of variable rate basis | ' | ' | ' | ' | ' | ' | ' | ' | ' | 'the highest of JPMorgan Chase Bank, N.A.'s prime rate, the federal funds rate plus a margin equal to 0.50% and the adjusted LIBOR rate for a 1-month interest period plus a margin equal to 1.00% | ' | ' | ' | 'adjusted LIBOR rate (based on one, two, three, or six-month interest periods) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Additional basis on variable rate base (percentage) | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 0.50% | ' | ' | ' | 1.00% | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Period for leverage ratio to determine interest rate spread | ' | ' | ' | ' | ' | ' | ' | 'preceding four fiscal quarter period | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Interest expense | $12,545,000 | $11,077,000 | $36,755,000 | $30,983,000 | $4,100,000 | $11,500,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | $3,100,000 | $6,100,000 |
Interest rate spread on overdue principal in event of default (percentage) | ' | ' | ' | ' | ' | ' | ' | ' | 2.00% | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Interest rate spread on overdue amounts in event of default (percentage) | ' | ' | ' | ' | ' | ' | ' | ' | 2.00% | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Contingencies_Details
Contingencies (Details) (USD $) | Dec. 31, 2013 | Sep. 30, 2012 | Dec. 31, 2012 | Dec. 31, 2013 | Apr. 08, 2010 |
In Millions, unless otherwise specified | SST acquisition [Member] | SST acquisition [Member] | SST acquisition [Member] | Indemnification agreement [Member] | Pending Litigation [Member] |
Unusual or Infrequent Item [Member] | Unusual or Infrequent Item [Member] | SST acquisition [Member] | |||
Loss contingencies [Line Items] | ' | ' | ' | ' | ' |
Loss contingencies, estimate of possible loss | ' | ' | ' | $121 | $13 |
Legal settlement costs | ' | 11.5 | 11.5 | ' | ' |
Contingent liabilities outstanding | $5.70 | ' | ' | ' | ' |
Derivative_Instruments_Details
Derivative Instruments (Details) (USD $) | 9 Months Ended | |
Dec. 31, 2013 | Mar. 31, 2013 | |
Derivative [Line Items] | ' | ' |
Percentage Of Company Sales Denominated In Us Dollars | 99.00% | ' |
Notional Amount of Foreign Currency Derivatives | ' | $6,000,000 |
Comprehensive_Income_Schedule_
Comprehensive Income (Schedule of Changes in the Components of AOCI) (Details) (USD $) | 9 Months Ended |
In Thousands, unless otherwise specified | Dec. 31, 2013 |
Changes in the components of AOCI | ' |
Balance at March 31, 2013 | $6,935 |
Other comprehensive loss before reclassifications | -8,011 |
Amounts reclassified from accumulated other comprehensive income (loss) | -1,503 |
Net other comprehensive loss | -9,514 |
Balance at December 31, 2013 | -2,579 |
Unrealized holding gains (losses) on available-for-sale securities | ' |
Changes in the components of AOCI | ' |
Balance at March 31, 2013 | 5,444 |
Other comprehensive loss before reclassifications | -8,011 |
Amounts reclassified from accumulated other comprehensive income (loss) | -1,503 |
Net other comprehensive loss | -9,514 |
Balance at December 31, 2013 | -4,070 |
Minimum pension liability | ' |
Changes in the components of AOCI | ' |
Balance at March 31, 2013 | 52 |
Other comprehensive loss before reclassifications | 0 |
Amounts reclassified from accumulated other comprehensive income (loss) | 0 |
Net other comprehensive loss | 0 |
Balance at December 31, 2013 | 52 |
Foreign Currency | ' |
Changes in the components of AOCI | ' |
Balance at March 31, 2013 | 1,439 |
Other comprehensive loss before reclassifications | 0 |
Amounts reclassified from accumulated other comprehensive income (loss) | 0 |
Net other comprehensive loss | 0 |
Balance at December 31, 2013 | $1,439 |
Comprehensive_Income_Schedule_1
Comprehensive Income (Schedule of Reclassifications of Recognized Transactions out of AOCI) (Details) (USD $) | 3 Months Ended | 9 Months Ended | ||
In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] | ' | ' | ' | ' |
Unrealized gains on available-for-sale securities | $3,824 | ($228) | $6,093 | $311 |
Taxes | -7,187 | 481 | -30,344 | -34,976 |
Reclassification of realized transactions, net of taxes | 105,401 | 10,173 | 283,786 | 67,699 |
Reclassification out of Accumulated Other Comprehensive Income | Unrealized gains on available-for-sale securities | ' | ' | ' | ' |
Reclassification out of Accumulated Other Comprehensive Income [Line Items] | ' | ' | ' | ' |
Unrealized gains on available-for-sale securities | 113 | 14 | 2,279 | 235 |
Taxes | 0 | 0 | -776 | -51 |
Reclassification of realized transactions, net of taxes | $113 | $14 | $1,503 | $184 |
ShareBased_Compensation_Detail
Share-Based Compensation (Details) (USD $) | 3 Months Ended | 9 Months Ended | ||||||
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | |||||
Stock-based compensation expense [Line Items] | ' | ' | ' | ' | ||||
Allocated Share-based Compensation Expense | $12,209,000 | $11,365,000 | $36,874,000 | $37,163,000 | ||||
Inventory [Member] | ' | ' | ' | ' | ||||
Stock-based compensation expense [Line Items] | ' | ' | ' | ' | ||||
Amount of share-based compensation expense capitalized to inventory | 1,900,000 | 1,800,000 | 5,700,000 | 5,300,000 | ||||
Cost of Sales [Member] | ' | ' | ' | ' | ||||
Stock-based compensation expense [Line Items] | ' | ' | ' | ' | ||||
Allocated Share-based Compensation Expense | 1,841,000 | [1] | 1,834,000 | [1] | 5,674,000 | [1] | 5,758,000 | [1] |
Research and development [Member] | ' | ' | ' | ' | ||||
Stock-based compensation expense [Line Items] | ' | ' | ' | ' | ||||
Allocated Share-based Compensation Expense | 6,141,000 | 6,172,000 | 18,762,000 | 16,562,000 | ||||
Selling, General and Administrative Expenses [Member] | ' | ' | ' | ' | ||||
Stock-based compensation expense [Line Items] | ' | ' | ' | ' | ||||
Allocated Share-based Compensation Expense | 5,737,000 | 6,114,000 | 16,939,000 | 22,339,000 | ||||
Pre-tax effect of share based compensation [Member] | ' | ' | ' | ' | ||||
Stock-based compensation expense [Line Items] | ' | ' | ' | ' | ||||
Allocated Share-based Compensation Expense | 13,719,000 | 14,120,000 | 41,375,000 | 44,659,000 | ||||
Income tax benefit [Member] | ' | ' | ' | ' | ||||
Stock-based compensation expense [Line Items] | ' | ' | ' | ' | ||||
Allocated Share-based Compensation Expense | $1,510,000 | $2,755,000 | $4,501,000 | $7,496,000 | ||||
[1] | During the three and nine months ended DecemberB 31, 2013, $1.9 million and $5.7 million, respectively, of share-based compensation expense was capitalized to inventory and $1.8 million and $5.7 million, respectively, of previously capitalized share-based compensation expenses in inventory was sold. During the three and nine months ended DecemberB 31, 2012, $1.8 million and $5.3 million, respectively, of share-based compensation expense was capitalized to inventory and $1.8 million and $5.8 million, respectively, of previously capitalized share-based compensation expense in inventory was sold. |
Net_income_per_common_share_De
Net income per common share (Details) (USD $) | 3 Months Ended | 9 Months Ended | ||
In Thousands, except Share data, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 |
Earnings Per Share [Abstract] | ' | ' | ' | ' |
Net income | $105,401 | $10,173 | $283,786 | $67,699 |
Weighted average common shares outstanding | 198,759,000 | 194,958,000 | 197,845,000 | 194,157,000 |
Dilutive effect of stock options and RSUs | 3,834,000 | 3,725,000 | 3,882,000 | 3,709,000 |
Dilutive effect of convertible debt | 16,496,384 | 5,721,774 | 14,215,573 | 6,687,078 |
Weighted average common and potential common shares outstanding | 219,089,000 | 204,405,000 | 215,943,000 | 204,553,000 |
Basic net income per common share | $0.53 | $0.05 | $1.43 | $0.35 |
Diluted net income per common share | $0.48 | $0.05 | $1.31 | $0.33 |
Weighted average conversion price per share used in calculating dilutive effect of convertible debt (amount per share) | $26.19 | $27.21 | $26.43 | $27.51 |
Number of antidilutive option shares (in shares) | ' | 124,395 | ' | 110,021 |
Dividends_Details
Dividends (Details) (USD $) | 0 Months Ended | 3 Months Ended | 9 Months Ended | 0 Months Ended | ||
Dec. 05, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Jan. 30, 2014 | |
Subsequent Event [Member] | ||||||
Dividends [Abstract] | ' | ' | ' | ' | ' | ' |
Dividend per share paid during period | $0.35 | ' | ' | $1.06 | ' | ' |
Dividends paid during period | $70,600,000 | ' | ' | $210,322,000 | $204,592,000 | ' |
Subsequent Event [Line Items] | ' | ' | ' | ' | ' | ' |
Dividends declared per common share | ' | $0.35 | $0.35 | $1.06 | $1.05 | $0.36 |
Total amount of expected dividend payment | ' | ' | ' | ' | ' | $70,700,000 |