Synaptics (SYNA) 10-Q 5 Feb 15 2015 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Dec. 27, 2014	Jan. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	27-Dec-14
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Trading Symbol	SYNA
Entity Registrant Name	SYNAPTICS INCORPORATED
Entity Central Index Key	817720
Current Fiscal Year End Date	-21
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		36,713,303

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified
Current Assets:
Cash and cash equivalents	$327,546	$447,205
Accounts receivable, net of allowances of $1,165 and $883 at December 31, 2014 and June 30, 2014, respectively	335,023	195,057
Inventories	145,215	82,311
Prepaid expenses and other current assets	35,196	17,858
Total current assets	842,980	742,431
Property and equipment at cost, net of accumulated depreciation of $59,916 and $49,482 at December 31, 2014 and June 30, 2014, respectively	115,145	80,849
Goodwill	214,443	61,030
Acquired intangibles, net	283,349	82,111
Non-current other assets	47,657	53,912
Total assets	1,503,574	1,020,333
Current Liabilities:
Accounts payable	149,535	97,109
Accrued compensation	33,474	30,682
Income taxes payable	11,830	12,538
Acquisition-related liabilities	97,549	57,388
Other accrued liabilities	94,433	56,691
Current portion of long-term debt	7,500
Total current liabilities	394,321	254,408
Long-term debt, net of issuance costs	238,099
Acquisition-related liabilities	85,626	52,734
Deferred tax liability	57,342
Other long-term liabilities	13,609	12,034
Total liabilities	788,997	319,176
Stockholders' Equity:
Common stock: $0.001 par value; 120,000,000 shares authorized, 56,997,204 and 55,911,513 shares issued, and 36,662,018 and 36,863,802 shares outstanding, at December 31, 2014 and June 30, 2014, respectively	57	56
Additional paid-in capital	798,203	740,282
Treasury stock: 20,335,186 and 19,047,711 common treasury shares at December 31, 2014 and June 30, 2014, respectively, at cost	-621,027	-530,422
Accumulated other comprehensive income	8,105	8,560
Retained earnings	529,239	482,681
Total stockholders' equity	714,577	701,157
Liabilities and stockholders' equity	$1,503,574	$1,020,333

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Jun. 30, 2014
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$1,165	$883
Property and equipment, accumulated depreciation	$59,916	$49,482
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	56,997,204	55,911,513
Common stock, shares outstanding	36,662,018	36,863,802
Common treasury shares	20,335,186	19,047,711

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Income (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Net revenue	$463,705	$205,763	$746,446	$428,370
Cost of revenue	336,874	111,218	499,426	224,546
Gross margin	126,831	94,545	247,020	203,824
Operating expenses:
Research and development	77,223	45,931	134,748	86,373
Selling, general, and administrative	22,056	22,845	52,729	43,969
Acquired intangibles amortization	6,203	261	6,465	523
Change in contingent consideration	-7,121	3,430	-11,623	3,688
Total operating expenses	98,361	72,467	182,319	134,553
Operating income	28,470	22,078	64,701	69,271
Interest and other income, net	497	476	1,121	906
Interest expense	-1,212	-5	-1,212	-9
Income before provision for income taxes	27,755	22,549	64,610	70,168
Provision for income taxes	7,783	5,215	18,052	17,895
Net income	$19,972	$17,334	$46,558	$52,273
Net income per share:
Basic	$0.55	$0.51	$1.26	$1.56
Diluted	$0.52	$0.48	$1.20	$1.47
Shares used in computing net income per share:
Basic	36,500	33,990	36,895	33,475
Diluted	38,248	36,059	38,882	35,586

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$19,972	$17,334	$46,558	$52,273
Other comprehensive income:
Change in unrealized net gain on investments	143	724	214	1,291
Reclassification from accumulated other comprehensive income to interest income for accretion of non-current investments	-344	-254	-669	-473
Net current-period other comprehensive income/(loss)	-201	470	-455	818
Comprehensive income	$19,771	$17,804	$46,103	$53,091

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities
Net income	$46,558	$52,273
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation costs	20,223	14,664
Depreciation and amortization	10,519	6,727
Acquired intangibles amortization	49,362	2,119
Accretion and remeasurement of contingent consideration liability	-11,623	3,688
Deferred taxes	-2,592	9,136
Non-cash interest income	-669	-473
Impairment recovery on investments	-179
Amortization of debt issuance costs	252
Foreign currency remeasurement gain	-7,238
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	-10,137	19,272
Inventories	-56,590	356
Prepaid expenses and other current assets	22,009	-3,477
Other assets	4,797	-4,060
Accounts payable	-3,372	-13,163
Accrued compensation	-582	-2,722
Income taxes payable	-29,813	-1,341
Other accrued liabilities	13,478	2,775
Net cash provided by operating activities	44,403	85,774
Cash flows from investing activities
Proceeds from sales of non-current investments	4,900
Acquisition of business, net of cash acquired	-293,783	-19,620
Purchases of property and equipment	-34,285	-17,142
Net cash used in investing activities	-323,168	-36,762
Cash flows from financing activities
Payment of contingent consideration	-7,706
Purchases of treasury stock	-90,605	-70,262
Proceeds from issuance of shares	16,836	39,193
Proceeds from issuance of long-term debt	245,367
Payment of debt issuance costs	-400
Excess tax benefit from share-based compensation	7,388
Payroll taxes for deferred stock units	-8,223	-3,822
Net cash provided by/(used in) financing activities	162,657	-34,891
Effect of exchange rate changes on cash and cash equivalents	-3,551
Net increase/(decrease) in cash and cash equivalents	-119,659	14,121
Cash and cash equivalents at beginning of period	447,205	355,303
Cash and cash equivalents at end of period	327,546	369,424
Supplemental disclosures of cash flow information
Cash paid for taxes	40,612	14,889
Non-cash investing and financing activities:
Property and equipment received but unpaid	2,133	1,117
Common stock issued in settlement of contingent consideration liability	$21,487	$37,499

Basis_of_Presentation

Basis of Presentation	6 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Basis of Presentation	1. Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission, or the SEC, and U.S. generally accepted accounting principles, or U.S. GAAP. However, certain information or footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to SEC rules and regulations. In our opinion, the financial statements include all adjustments, which are of a normal and recurring nature, necessary for the fair presentation of the results of the interim periods presented. The results of operations for the interim periods are not necessarily indicative of the operating results for the full fiscal year or any future period. These financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended June 28, 2014.
	The consolidated financial statements include our financial statements and those of our wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated upon consolidation.
	Our fiscal year is the 52- or 53-week period ending on the last Saturday in June. Our fiscal 2015 and 2014 years are 52-week periods ending on June 27, 2015 and June 28, 2014, respectively. The quarterly fiscal periods presented in this report were 13-week periods for the three months ended December 27, 2014 and December 28, 2013. For ease of presentation, the accompanying consolidated financial statements have been shown as ending on calendar quarter end dates for all annual, interim, and quarterly financial statement captions, unless otherwise indicated.
	Use of Estimates
	The preparation of consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue, expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate our estimates, including those related to revenue recognition, allowance for doubtful accounts, cost of revenue, inventories, loss on purchase commitments, product warranty, share-based compensation costs, provision for income taxes, deferred income tax asset valuation allowances, uncertain tax positions, goodwill, intangible assets, investments, contingent consideration liabilities, and loss contingencies. We base our estimates on historical experience, applicable laws and regulations, and various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.
	Foreign Currency Transaction Gains and Losses
	We use the U.S. dollar as our functional currency for financial reporting and therefore foreign currency transaction and remeasurement gains and losses are included in results of operations and are primarily the result of revaluing assets and liabilities denominated in a currency other than the functional currency. These foreign currency transactions, which primarily related to a recent acquisition, resulted in a net gain of $15.1 million in the three months ended December 31, 2014, and were not material in prior periods.

Revenue_Recognition

Revenue Recognition	6 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Revenue Recognition	2. Revenue Recognition
	We recognize revenue from product sales when there is persuasive evidence that an arrangement exists, delivery has occurred and title has transferred, the price is fixed or determinable, and collection is reasonably assured. We accrue for estimated sales returns, incentives, and other allowances at the time we recognize revenue. Our products contain embedded firmware and software, which together with, or consisting of, our ASIC chip, deliver the essential functionality of our products and, as such, software revenue recognition guidance is not applicable.

Net_Income_Per_Share

Net Income Per Share	6 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Net Income Per Share	3. Net Income Per Share
	The computation of basic and diluted net income per share was as follows (in thousands, except per share data):
		Three Months Ended				Six Months Ended
		December 31,				December 31,
		2014		2013		2014		2013
	Numerator:
	Net income	$	19,972	$	17,334	$	46,558	$	52,273
	Denominator:
	Shares, basic		36,500		33,990		36,895		33,475
	Effect of dilutive share-based awards		1,748		2,069		1,987		2,111
	Shares, diluted		38,248		36,059		38,882		35,586
	Net income per share:
	Basic	$	0.55	$	0.51	$	1.26	$	1.56
	Diluted	$	0.52	$	0.48	$	1.2	$	1.47
	Our basic net income per share amounts for each period presented have been computed using the weighted average number of shares of common stock outstanding. Our diluted net income per share amounts for each period presented include the weighted average effect of potentially dilutive shares. We use the “treasury stock” method to determine the dilutive effect of our stock options, deferred stock units, or DSUs, and market stock units, or MSUs.
	Dilutive net income per share amounts do not include the potential weighted average effect of 532,982 and 315,275 shares of common stock related to certain share-based awards that were outstanding during the three months ended December 31, 2014 and 2013, respectively, and 332,892 and 317,438 shares of common stock related to certain share-based awards that were outstanding during the six months ended December 31, 2014 and 2013, respectively. These share-based awards were not included in the computation of diluted net income per share because their effect would have been antidilutive.

Fair_Value

Fair Value	6 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value	4. Fair Value
	Financial assets and liabilities, measured at fair value on a recurring basis by level within the fair value hierarchy, consisted of the following (in thousands):
		December 31,					June 30,
		2014					2014
		Level 1			Level 3		Level 1		Level 3
	Assets:
	Money market funds	$	133,061		$	—	$	439,675	$	—
	Auction rate securities		—			15,278		—		19,785
	Total available-for-sale securities	$	133,061		$	15,278	$	439,675	$	19,785
	Liabilities:
	Contingent consideration liabilities recorded for business combinations	$	—		$	69,306	$	—	$	110,122
	In our condensed consolidated balance sheets as of December 31, 2014 and June 30, 2014, money market balances were included in cash and cash equivalents and auction rate securities, or ARS investments, were included in non-current investments; $600,000 of the ARS investments were included in prepaid expenses and other current assets as of December 31, 2014. The contingent consideration liability recorded for business combinations was included in acquisition-related liabilities as of December 31, 2014 and June 30, 2014, respectively.
	Changes in fair value of our Level 3 financial assets as of December 31, 2014 were as follows (in thousands):
	Balance as of June 30, 2014	$	19,785
	Net gain		393
	Redemptions		(4,900	)
	Balance as of December 31, 2014	$	15,278
	Changes in fair value of our Level 3 contingent consideration liabilities as of December 31, 2014 were as follows (in thousands):
	Balance as of June 30, 2014	$	110,122
	Cash settlement of contingent consideration liability		(7,706	)
	Issuance of common stock in settlement of liability		(21,487	)
	Accretion and remeasurement		(11,623	)
	Balance as of December 31, 2014	$	69,306
	In connection with our acquisition of Validity Sensors, Inc., or Validity, we entered into a contingent consideration arrangement and as of December 31, 2014, we may be required to make additional cash payments of up to $130.9 million as consideration to the former Validity stockholders and option holders based on unit sales of products utilizing Validity technology through March 2016.
	In connection with our acquisition of Pacinian Corporation, or Pacinian, we entered into a contingent consideration arrangement. As of December 31, 2014, we may be required to make additional cash payments of up to $10.0 million as consideration to the former Pacinian stockholders based on unit sales of products utilizing ThinTouch technology through June 2016.
	Changes in the fair value of our contingent consideration liabilities subsequent to the acquisition are included in operating expenses as change in contingent consideration in the condensed consolidated statements of income. Cash payments of contingent consideration are classified in the condensed consolidated statements of cash flows as a financing activity up to the amount of the contingent consideration recorded at the time of the acquisition, and as an operating activity for cash payments that exceed the liability recorded at the time of acquisition.
	There were no transfers in or out of our Level 1, 2, or 3 assets or liabilities during the three and six months ended December 31, 2014 and 2013.
	The fair values of our accounts receivable and accounts payable approximate their carrying values because of the short-term nature of those instruments. Intangible assets, property and equipment, and goodwill are measured at fair value on a non-recurring basis if impairment is indicated. Our bank debt is subject to a variable interest rate, which is subject to change from time to time to reflect a market interest rate; accordingly, the carrying value of our bank debt approximates fair value.

Noncurrent_Investments

Non-current Investments	6 Months Ended
	Dec. 31, 2014
Investments, All Other Investments [Abstract]
Non-current Investments	5. Non-current Investments
	Our non-current investments consist of ARS investments, which have failed to settle in auctions and are not liquid. In the event we need to access these funds prior to their maturity, we will not be able to do so without a loss of principal, unless redeemed by the issuers or a future auction on these investments is successful. During the six months ended December 31, 2014, $4.9 million of our ARS investments were redeemed.
	As there are currently no active markets for our various failed ARS investments, we have estimated the fair value as of December 31, 2014 using a trinomial discounted cash flow analysis. The analysis considered, among others, the following factors:
		•		the collateral underlying the security investments;
		•		the creditworthiness of the counterparty;
		•		the timing of expected future cash flows;
		•		the probability of a successful auction in a future period;
		•		the underlying structure of each investment;
		•		the present value of future principal and interest payments discounted at rates considered to reflect current market conditions;
		•		a consideration of the probabilities of default, passing a future auction, or redemption at par for each period; and
		•		estimates of the recovery rates in the event of default for each investment.
	When possible, our ARS investments were compared to other observable market data or securities with similar characteristics. Our estimate of the fair value of our ARS investments could change materially from period to period based on future market conditions.
	We have ARS investments with a fair value of $12.5 million maturing from fiscal years 2016 to 2018 and $2.8 million fair value with no maturity date. Of our ARS investments, $600,000 par value are investment grade, and the remaining $18.5 million par value are below investment grade.
	The various types of ARS investments we held as of December 31, 2014, including the original cost basis, other-than-temporary impairment included in retained earnings, new cost basis, unrealized gain/(loss), and fair value, consisted of the following (in thousands):
			Original Cost		Other-than-			New Cost		Unrealized			Fair
			Basis		temporary			Basis		Gain/(Loss)			Value
					Impairment in
					Retained Earnings
	Credit linked notes		$	13,500	$	(6,844	)(1)	$	6,656	$	5,284		$	11,940
	Preferred stock			5,000		(5,000	)		—		2,750			2,750
	Municipals			600		(83	)		517		71			588
	Total ARS		$	19,100	$	(11,927	)	$	7,173	$	8,105		$	15,278
	-1	Other-than-temporary impairment in retained earnings is partially offset by cumulative accretion of $1.9 million on non-current investments. Accretion is reclassified from accumulated other comprehensive income and recorded in the condensed consolidated statements of income as non-cash interest income.
	The various types of ARS investments we held as of June 30, 2014, including the original cost basis, other-than-temporary impairment included in retained earnings, new cost basis, unrealized gain/(loss), and fair value, consisted of the following (in thousands):
			Original Cost		Other-than-			New Cost		Unrealized			Fair
			Basis		temporary			Basis		Gain/(Loss)			Value
					Impairment in
					Retained Earnings
	Student loans		$	3,500	$	(179	)	$	3,321	$	(149	)	$	3,172
	Credit linked notes			13,500		(7,513	)(1)		5,987		5,891			11,878
	Preferred stock			5,000		(5,000	)		—		2,750			2,750
	Municipals			2,000		(83	)		1,917		68			1,985
	Total ARS		$	24,000	$	(12,775	)	$	11,225	$	8,560		$	19,785
	-1	Other-than-temporary impairment in retained earnings is partially offset by cumulative accretion of $1.3 million on non-current investments. Accretion is reclassified from accumulated other comprehensive income and recorded in the condensed consolidated statements of income as non-cash interest income.
	The ARS investments in each of the above tables with unrealized losses have been in a continuous unrealized loss position for more than 12 months.
	We have accounted for all of our ARS investments as non-current as we are not able to reasonably determine when the ARS markets will recover or be restructured. Based on our ability to access our cash and cash equivalents, our expected operating cash flows, and our other sources of cash, we do not intend to sell the ARS investments, and it is not more likely than not that we will be required to sell the investments before the recovery of the amortized cost basis.

Inventories

Inventories	6 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Inventories	6. Inventories
	Inventories are stated at the lower of cost (first-in, first-out method) or market (estimated net realizable value) and consisted of the following (in thousands):
		December 31,		June 30,
		2014		2014
	Raw materials	$	75,089	$	58,717
	Finished goods		70,126		23,594
		$	145,215	$	82,311

Acquisition

Acquisition	6 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Acquisition	7. Acquisition
	On June 11, 2014, we entered into a stock purchase agreement to acquire all of the outstanding stock of Renesas SP Drivers, Inc., or RSP, a leading provider of small- and medium-sized display driver integrated circuits for smartphones and tablets, or the RSP Acquisition. The RSP Acquisition is intended to accelerate our product roadmap for high-performance, low-cost display integration products, strengthen our relationships with key customers, and create opportunities to drive increased revenue. Effective as of October 1, 2014, or the Closing Date, we completed the RSP Acquisition of 100% of the outstanding capital stock of RSP for an initial purchase price of approximately ¥50.6 billion (or approximately $463 million), with Japanese yen converted into U.S. dollars at the Closing Date conversion rate of 109.4 Japanese yen to U.S. dollar. The purchase price at the closing of the RSP Acquisition was paid entirely in cash, with ¥7.25 billion (or approximately $66 million) held back until the date that is 18 months after the Closing Date to address any post-closing adjustments or claims, or the Indemnification Holdback, and ¥5.25 billion (or approximately $48 million) held back in respect of a potential post-closing working capital, cash balance, indebtedness and transaction expenses adjustments, or the Working Capital Holdback, which is due in the three months ending March 31, 2015. Subsequent to the Closing Date, we determined that additional purchase consideration was due to the sellers and have adjusted the purchase price by $10.9 million. The acquisition date fair value of the consideration transferred is approximately $474 million.
	The Working Capital Holdback as adjusted for additional purchase consideration is included in acquisition-related liabilities under current liabilities of the condensed consolidated balance sheet and is expected to be settled in our March 2015 quarter. The Indemnification Holdback is included in acquisition-related liabilities in the long-term liabilities section of the condensed consolidated balance sheet and is expected to be settled in fiscal 2016. The RSP Acquisition has been accounted for as a business combination in the three months ending in December 2014 and results of RSP’s operations have been included in our consolidated financial statements since the Closing Date. Under the stock purchase agreement, RSP entered into an inventory purchase obligation with Renesas Electronics Corporation, or REL, to acquire closing date inventory held by REL. Such inventory purchase obligation was settled in the three months ended December 31, 2014 for approximately $115 million.
	Our estimate of the fair values of the acquired intangible assets at December 31, 2014 is preliminary and subject to change and is based on established and accepted valuation techniques performed by our third-party valuation specialists. Additional information, which existed as of the acquisition date but is yet unknown to us, may become known to us during the remainder of the measurement period, which will not exceed 12 months from the acquisition date. Changes to amounts recorded as assets or liabilities will be recorded as retrospective adjustments to the provisional amounts recognized as of the acquisition date and may result in a corresponding adjustment to goodwill.
	The following table summarizes the provisional amounts recorded for the estimated fair values of the assets acquired and liabilities assumed as of the acquisition date (in thousands):
	Cash	$	54,705
	Short-term deposit		36,614
	Accounts receivable		140,210
	Current deferred tax asset		2,762
	Inventory		6,296
	Property and equipment		11,674
	Acquired intangible assets		250,600
	Other assets		4,002
	Total identifiable assets acquired		506,863
	Accounts payable		66,544
	Income taxes payable		32,534
	Deferred tax liability		59,516
	Other accrued liabilities		28,032
	Net identifiable assets acquired		320,237
	Goodwill		153,413
	Net assets acquired	$	473,650
	Of the $250.6 million of acquired intangible assets, $138.6 million was allocated to developed technology and will amortize over an estimated weighted average useful life of 5 years; $60.2 million was allocated to customer relationships and will be amortized over estimated useful lives of 2 to 3 years; $21.5 million was allocated to a supplier arrangement and will be amortized over an estimated useful life of less than 1 year; $11.0 million was allocated to backlog and will be amortized over an estimated useful life of less than 1 year; and $19.4 million was allocated to in-process research and development and will be amortized over an estimated useful life to be determined at the date the underlying projects are deemed to be substantively complete. Developed technology consists of established small- and medium-sized display driver technology designed for and sold into the smartphone and tablet markets. We preliminarily estimated the fair value of the identified intangible assets using a discounted cash flow model for each of the underlying identified intangible assets. These fair value measurements were based on significant inputs not observable in the market and thus represent a Level 3 measurement. Key assumptions include the level and timing of expected future cash flows, conditions and demands specific to each intangible asset over its remaining useful life, and discount rates we believe to be consistent with the inherent risks associated with each type of asset, which range from 9% to 14%. The fair value of these intangible assets is primarily affected by the projected income and the anticipated timing of the projected income associated with each intangible asset coupled with the discount rates used to derive their estimated present values. We believe the level and timing of expected future cash flows appropriately reflects market participant assumptions.
	The value of goodwill reflects the anticipated synergies of the combined operations and workforce of RSP as of the acquisition date.
	None of the goodwill is expected to be deductible for income tax purposes. Prior to the RSP Acquisition, we did not have an existing relationship or transactions with RSP. The condensed consolidated financial statements include approximately $238.6 million of revenue and approximately $16.5 million of operating income from RSP from the Closing Date through December 31, 2014.
	The following unaudited pro forma financial information presents the combined results of operations for us and RSP as if the RSP Acquisition had occurred on June 30, 2013. The unaudited pro forma financial information has been prepared for comparative purposes only and does not purport to be indicative of the actual operating results that would have been recorded had the RSP Acquisition actually taken place on June 30, 2013, and should not be taken as indicative of future consolidated operating results. Additionally, the unaudited pro forma financial results do not include any anticipated synergies or other expected benefits from the acquisition.
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2014			2013			2014			2013
		(in thousands, except per share data)
	Revenue	$	463,705		$	399,301		$	957,407		$	808,704
	Net income		39,612			35,466			82,054			73,313
	Net income per share - diluted		1.04			0.98			2.11			2.06
	Pro forma adjustments used to arrive at pro forma net income for the three and six months ended December 31, 2014 and December 31, 2013, were as follows (in thousands):
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2014			2013			2014			2013
	Buyer transaction costs	$	3,000		$	18		$	4,300		$	18
	Amortization of debt issuance costs		—			(250	)		(250	)		(500	)
	Interest expense		—			(1,561	)		(2,852	)		(2,828	)
	Intangible amortization		26,000			(19,319	)		13,131			(58,188	)
	Income tax adjustment		(9,360	)		6,955			(4,727	)		20,948
	Total	$	19,640		$	(14,157	)	$	9,602		$	(40,550	)

Acquired_Intangibles

Acquired Intangibles	6 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Acquired Intangibles	8. Acquired Intangibles
	The following table summarizes the life, the gross carrying value of our acquired intangible assets, and the related accumulated amortization as of December 31, 2014 and June 30, 2014 (in thousands):
		Life		December 31,			June 30,
				2014			2014
	Display driver developed technology	5 years		$	138,550		$	—
	Fingerprint developed technology	2-4 years			75,650			18,650
	ThinTouch developed technology	7 years			8,900			8,900
	Customer relationships	2-5 years			64,000			3,800
	Licensed technology and other	5 years			1,335			1,335
	Backlog	Less than 1 year			11,700			750
	Patents	5 years			100			100
	Supplier arrangement	Less than 1 year			21,500			—
	In-process research and development	Not applicable			19,400			57,000
					341,135			90,535
	Accumulated amortization				(57,786	)		(8,424	)
	Acquired intangibles, net			$	283,349		$	82,111
	The total amortization expense for the acquired intangible assets was $45.1 million and $1.9 million for the three months ended December 31, 2014 and 2013, respectively, and $49.4 million and $2.1 million for the six months ended December 31, 2014, and 2013, respectively. During the first quarter of fiscal 2015, the in-process research and development projects related to the Validity acquisition were completed, have been included in fingerprint developed technology, and amortization commenced. Amortization expense was included in our condensed consolidated statements of income in cost of revenue and acquired intangibles amortization.
	The following table presents expected annual fiscal year aggregate amortization expense as of December 31, 2014 (in thousands):
	Remainder of 2015	$	44,648
	2016		72,851
	2017		60,731
	2018		46,095
	2019		30,948
	2020		8,199
	Thereafter		477
	To be determined		19,400
	Future amortization	$	283,349

Other_Accrued_Liabilities

Other Accrued Liabilities	6 Months Ended
	Dec. 31, 2014
Payables and Accruals [Abstract]
Other Accrued Liabilities	9. Other Accrued Liabilities
	Other accrued liabilities consisted of the following (in thousands):
		December 31,		June 30,
		2014		2014
	Customer obligations	$	59,372	$	38,758
	Inventory obligations		15,832		4,096
	Warranty		2,759		1,659
	Other		16,470		12,178
		$	94,433	$	56,691

Product_Warranties_Indemnifica

Product Warranties, Indemnifications, and Contingencies	6 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Product Warranties, Indemnifications, and Contingencies	10. Product Warranties, Indemnifications, and Contingencies
	Product Warranties
	We generally warrant our products for a period of 12 months from the date of sale and estimate probable product warranty costs at the time we recognize revenue. Factors that affect our warranty liability include historical and anticipated rates of warranty claims, materials usage, rework, and delivery costs. We assess the adequacy of our warranty obligations each reporting period and adjust the accrued warranty liability on the basis of our estimates.
	Indemnifications
	In connection with certain agreements, we are obligated to indemnify the counter party against third-party claims alleging infringement of certain intellectual property rights by us. We have also entered into indemnification agreements with our officers and directors. Maximum potential future payments cannot be estimated because these agreements do not typically have a maximum stated liability. However, historical costs related to these indemnification provisions have not been significant. We have not recorded any material liability in our consolidated financial statements for such indemnification obligations.
	Contingencies
	We have in the past and may in the future receive notices from third parties that claim our products infringe their intellectual property rights. We cannot be certain that our technologies and products do not and will not infringe issued patents or other proprietary rights of third parties.
	Any infringement claims, with or without merit, could result in significant litigation costs and diversion of management and financial resources, including the payment of damages, which could have a material adverse effect on our business, financial condition, and results of operations.

Debt

Debt	6 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Debt	11. Debt
	In connection with the RSP Acquisition, on October 1, 2014 (see Note 7), we entered into a credit agreement, or the Credit Agreement, with the lenders party thereto, or the Lenders, and Wells Fargo Bank, National Association, as administrative agent for the Lenders.
	The Credit Agreement provides for, among other things, (i) a revolving credit facility of up to $150 million, which includes a $20 million sublimit for letters of credit and a $20 million sublimit for swingline loans, and (ii) a term loan facility in an amount of $150 million. Under the terms of the Credit Agreement, we may, subject to the satisfaction of certain conditions, request increases in the revolving credit facility commitments and additional term loan commitments in an aggregate principal amount of up to $100 million to the extent existing or new lenders agree to provide such increased or additional commitments, as applicable. We borrowed $150 million under the term loan facility and $100 million under the revolving credit facility to finance a portion of the RSP Acquisition purchase price. Debt issuance costs were approximately $5.0 million, including a financing commitment provided to the seller at the RSP Acquisition signing date and legal fees, and are being amortized over 60 months.
	Our obligations under the Credit Agreement are guaranteed by the material domestic subsidiaries of our company, subject to certain exceptions (such material subsidiaries, together with our company, collectively, the Credit Parties). The obligations of the Credit Parties under the Credit Agreement and the other loan documents delivered in connection therewith are secured by a first priority security interest in substantially all of the existing and future personal property of the Credit Parties, including, without limitation, 65% of the voting capital stock of certain of the Credit Parties’ direct foreign subsidiaries, subject to certain exceptions.
	The revolving credit facility and term loans bear interest at our election of a Base Rate plus an applicable margin or LIBOR plus an applicable margin. Swingline loans bear interest at a Base Rate plus an applicable margin. The Base Rate is a floating rate that is the greater of the Prime Rate, the Federal Funds Rate plus 50 basis points, or LIBOR plus 100 basis points. The applicable margin is based on a sliding scale which ranges from zero to 100 basis points for Base Rate loans and 100 basis points to 200 basis points for LIBOR loans.
	The term loan facility requires repayment over five years with nineteen quarterly principal payments beginning in the three months ending March 31, 2015. Each of the first four quarterly principal payments is $1.9 million, and each of the next fourteen quarterly principal payments is $3.8 million, followed by a final principal payment of $90.0 million on September 30, 2019. The revolving credit facility requires payment in full at the end of five years on September 30, 2019. We are also required to pay a commitment fee for any unused portion of the revolving credit facility, which ranges from 0.25% to 0.45% per annum. Interest on the term loan facility and revolving credit facility is payable quarterly.
	Under the Credit Agreement, there are restrictive operating covenants, including three financial covenants which limit the consolidated total leverage ratio, or leverage ratio, the consolidated interest coverage ratio, or interest coverage ratio, and places a restriction on the amount of capital expenditures that may be made in any fiscal year. The leverage ratio is the ratio of debt as of the measurement date to earnings before interest, taxes, depreciation and amortization, or EBITDA, for the four consecutive quarters ending with the quarter of measurement. The leverage ratio must not exceed 2.50 to 1.0 during the first two years of the agreement, and 2.0 to 1.0 during the last three years of the agreement. The interest coverage ratio is EBITDA to interest expense for the four consecutive quarters ending with the quarter of measurement. The interest coverage ratio must not be less than 3.50 to 1.0 during the term of the agreement. As of December 31, 2014, we were in compliance with the restrictive operating covenants.

ShareBased_Compensation

Share-Based Compensation	6 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	12. Share-Based Compensation
	Share-based compensation and the related tax benefit recognized in our condensed consolidated statements of income were as follows (in thousands):
		Three Months Ended					Six Months Ended
		December 31,					December 31,
		2014			2013		2014		2013
	Cost of revenue	$	336		$	262	$	638	$	516
	Research and development		5,950			4,241		11,350		8,168
	Selling, general, and administrative		4,442			3,119		8,235		5,980
	Total	$	10,728		$	7,622	$	20,223	$	14,664
	Income tax benefit on share-based compensation	$	3,045		$	2,834	$	5,731	$	4,806
	Historically, we have issued new shares in connection with our share-based compensation plans, however, treasury shares were also available for issuance as of December 31, 2014. Any additional shares repurchased under our common stock repurchase program would be available for issuance under our share-based compensation plans.
	Stock Options
	Stock option activity, including stock options granted, exercised, and forfeited, and weighted average exercise prices for stock options outstanding and exercisable, and the aggregate intrinsic value were as follows:
		Stock			Weighted		Aggregate
		Option			Average		Intrinsic
		Awards			Exercise		Value
		Outstanding			Price		(in thousands)
	Balance at June 30, 2014		3,693,375		$	30.08
	Granted		261,991			68.87
	Exercised		(375,730	)		29.21
	Forfeited		(25,363	)		39.82
	Balance at December 31, 2014		3,554,273			32.96	$	138,860
	Exercisable at December 31, 2014		2,568,671			26.77	$	115,729
	The aggregate intrinsic value was determined using the closing price of our common stock on December 26, 2014 of $71.80 and excludes the impact of stock options that were not in-the-money.
	Deferred Stock Units
	Deferred Stock Units, or DSU, activity, including DSUs granted, delivered, and forfeited, and the balance and aggregate intrinsic value of DSUs was as follows:
		DSU Awards			Aggregate
					Intrinsic
					Value
		Outstanding			(in thousands)
	Balance at June 30, 2014		1,058,243
	Granted		312,293
	Delivered		(264,784	)
	Forfeited		(39,829	)
	Balance at December 31, 2014		1,065,923		$	76,533
	The aggregate intrinsic value was determined using the closing price of our common stock on December 26, 2014 of $71.80.
	Of the shares delivered, 74,568 shares valued at $5.2 million were withheld to meet statutory minimum tax withholding requirements.
	Market Stock Units
	Our Amended and Restated 2010 Incentive Compensation Plan provides for the grant of Market Stock Unit, or MSU awards, to our employees, consultants, and directors. An MSU is a promise to deliver shares of our common stock at a future date based on the achievement of market-based performance requirements in accordance with the terms of the MSU grant agreement.
	We have granted MSUs to our executive officers, which are designed to vest in three tranches with the target quantity for each tranche equal to one-third of the total MSU grant. The first tranche vests based on a one-year performance period; the second tranche vests based on a two-year performance period; and the third tranche vests based on a three-year performance period. Performance is measured based on the achievement of a specified level of total stockholder return, or TSR, relative to the TSR of the Philadelphia Semiconductor Index, or SOX Index. The potential payout ranges from 0% to 200% of the grant target quantity and is adjusted on a two-to-one ratio based on our TSR performance relative to the SOX Index TSR performance using the following formula:
	(100% + ([Synaptics TSR - SOX Index TSR] x 2))
	Beginning with the MSU grants in fiscal 2015, the payout for tranche one and two will not exceed 100% and the payout for tranche three will be calculated based on the total target quantity for the entire grant multiplied by the payout factor, which will then be reduced by tranche one and tranche two stock issuances.
	Delivery of shares earned, if any, will take place on the dates provided in the applicable MSU grant agreement, assuming the grantee is still an employee, consultant, or director of our company at the end of the applicable performance period. On the delivery date, we withhold shares to cover statutory minimum tax withholding requirements and deliver a net quantity of shares to the employee, consultant, or director after such withholding. Until delivery of shares, the grantee has no rights as a stockholder with respect to any shares underlying the MSU award.
	During the six months ended December 31, 2014, MSU activity, including MSUs granted, delivered, and forfeited, and the balance and aggregate intrinsic value of MSUs as of December 31, 2014 was as follows:
		MSU			Aggregate
		Awards			Intrinsic
					Value
		Outstanding			(in thousands)
	Balance at June 30, 2014		120,330
	Granted		70,300
	Performance adjustment		46,712
	Delivered		-93,424
	Forfeited		—
	Balance at December 31, 2014		143,918		$	10,333
	We value the MSUs using the Monte Carlo simulation model on the date of grant and amortize the compensation expense over the three-year performance and service period on a straight-line basis. The unrecognized share-based compensation cost of our outstanding MSUs was approximately $7.7 million as of December 31, 2014, which will be recognized over a weighted average period of approximately 1.44 years. The aggregate intrinsic value was determined using the closing price of our common stock on December 26, 2014 of $71.80.
	Of the shares delivered, 47,883 shares valued at $3.0 million were withheld to meet statutory minimum tax withholding requirements.
	Employee Stock Purchase Plan
	Shares purchased, weighted average purchase price, cash received, and the aggregate intrinsic value for employee stock purchase plan purchases during the six-month period ended December 31, 2014 were as follows (in thousands, except for shares purchased and weighted average price):
	Shares purchased		230,241
	Weighted average purchase price	$	25.46
	Cash received	$	5,862
	Aggregate intrinsic value	$	8,390

Income_Taxes

Income Taxes	6 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	13. Income Taxes
	We account for income taxes under the asset and liability method. We consider the operating earnings of our foreign subsidiaries to be indefinitely invested outside the United States. Therefore no provision has been made for the federal, state, or foreign taxes that may result from future remittances of undistributed earnings of our foreign subsidiaries.
	The provision for income taxes recorded in interim periods is recorded by applying the estimated annual effective tax rate to year-to-date income before income taxes, excluding the effects of significant unusual or infrequently occurring discrete items and the change in contingent consideration liability which is not reliably estimable. The tax effects of discrete items and the change in contingent consideration liability are recorded in the same period that the related item is reported and resulted in the difference between the actual effective tax rate for the three months ended December 31, 2014 and 2013, and the estimated annual effective tax rates for those same periods of 39.0% and 27.2%, respectively.
	The provision for income taxes of $7.8 million and $5.2 million for the three months ended December 31, 2014 and 2013, respectively, represented estimated federal, state, and foreign income taxes. Our annual effective tax rate diverged from the combined U.S. federal and state statutory tax rate primarily because of foreign income taxed at lower tax rates, and research and development credits, partially offset by foreign withholding taxes, nondeductible amortization, and net unrecognized tax benefits associated with qualified stock options. Discrete items recognized in the three months ended December 31, 2014 and 2013, included additional penalties and interest for uncertain tax positions related to prior fiscal years, research and development credits, and tax benefits realized from share-based compensation.
	The provision for income taxes of $18.1 million and $17.9 million for the six months ended December 31, 2014 and 2013, respectively, represented estimated federal, foreign, and state income taxes. Our annual effective tax rate diverged from the combined U.S. federal and state statutory tax rate primarily because of foreign income taxed at lower tax rates, and research and development credits, partially offset by foreign withholding taxes, nondeductible amortization, and net unrecognized tax benefits associated with qualified stock options. Discrete items recognized in the six months ended December 31, 2014 and 2013, included additional penalties and interest for uncertain tax positions related to prior fiscal years, research and development credits, and tax benefits realized from share-based compensation.
	Unrecognized Tax Benefits
	The total liability for gross unrecognized tax benefits increased $1.4 million during the six months ended December 31, 2014 to $11.6 million from $10.2 million at June 30, 2014 and was included in other long-term liabilities on our condensed consolidated balance sheets. If recognized, this total amount would affect the effective tax rate on income from continuing operations. Accrued interest and penalties related to unrecognized tax benefits as of December 31, 2014 was $1.1 million; this balance increased by $116,000 from June 30, 2014. We classify interest and penalties as components of income tax expense.
	The Tax Increase Prevention Act, or the Act, which retroactively extended the federal research credit from January 1, 2014 through December 31, 2014, was enacted on December 19, 2014. As such, we recognized six months of tax benefit from the federal research tax credit related to fiscal 2014 and another six months of federal research tax credit related to fiscal 2015.
	In May 2011, we were notified by the Internal Revenue Service, or the Service, that our fiscal 2003 through 2006 and fiscal 2008 through 2010 returns would be subject to examination. In March 2013, we received the Revenue Agent’s Report resolving our examination with the Service and paid an assessment that had no material impact on our condensed consolidated financial statements. Our case is pending review by the Joint Committee on Taxation, which we anticipate will conclude in our fiscal 2015. Any prospective adjustments to our unrecognized tax benefits will be recorded as an increase or decrease to income tax expense and cause a corresponding change to our effective tax rate. Accordingly, our effective tax rate could fluctuate materially from period to period.
	Our major tax jurisdictions are the United States, California, Hong Kong SAR, and Japan. For fiscal 2003 onward, we remain subject to examination by one or more of these jurisdictions.

Segment_Customers_and_Geograph

Segment, Customers, and Geographic Information	6 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment, Customers, and Geographic Information	14. Segment, Customers, and Geographic Information
	We operate in one segment: the development, marketing, and sale of semiconductors, which provide interactive user interface solutions for electronic devices and products. We generate our revenue from two broad product categories: the mobile product market and the personal computing, or PC, product market. We sell our products to original equipment manufacturers, or OEMs, and to contract manufacturers that provide manufacturing services to OEMs.
	Net revenue within geographic areas based on our customers’ locations for the periods presented was as follows (in thousands):
			Three Months Ended						Six Months Ended
			December 31,						December 31,
			2014			2013			2014			2013
	China		$	126,251		$	110,570		$	274,421		$	217,936
	Japan			231,271			10,386			237,007			22,466
	United States			37,475			2,070			78,227			3,772
	Taiwan			32,194			34,068			68,430			66,369
	South Korea			31,975			48,669			78,816			117,827
	Other			4,539			—			9,545			—
			$	463,705		$	205,763		$	746,446		$	428,370
	Net revenue from external customers for each group of similar products was as follows (in thousands):
			Three Months Ended						Six Months Ended
			December 31,						December 31,
			2014			2013			2014			2013
	Mobile product applications		$	398,308		$	133,604		$	598,042		$	296,268
	PC product applications			65,397			72,159			148,404			132,102
			$	463,705		$	205,763		$	746,446		$	428,370
	Net revenue from major customers as a percentage of total net revenue for the periods presented was as follows:
			Three Months Ended						Six Months Ended
			December 31,						December 31,
			2014			2013			2014			2013
	Customer A			24	%		*			15	%		*
	Customer B			13	%		18	%		17	%		20	%
	Customer C			12	%		*			*			*
	Customer D			12	%		*			*			*
	Customer E			*			11	%		*			*
	*	Less than 10%
	We extend credit based on an evaluation of a customer’s financial condition, and we generally do not require collateral. Major customer accounts receivable as a percentage of total accounts receivable at the dates presented were as follows:
			December 31,			June 30,
			2014			2014
	Customer A			16	%		*
	Customer B			14	%		*
	Customer C			11	%		*
	Customer D			10	%		*
	Customer E			*			28	%
	*	Less than 10%

Comprehensive_Income

Comprehensive Income	6 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Comprehensive Income	15. Comprehensive Income
	Our comprehensive income generally consists of net income plus the effect of unrealized gains and losses on our investments, primarily due to temporary changes in market value of certain of our ARS investments. In addition, we recognize the noncredit portion of other-than-temporary impairment on debt securities in other comprehensive income. We recognize foreign currency remeasurement adjustments and transaction gains and losses in our condensed consolidated statements of income as the U.S. dollar is the functional currency of our foreign entities.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	6 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates
	The preparation of consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue, expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate our estimates, including those related to revenue recognition, allowance for doubtful accounts, cost of revenue, inventories, loss on purchase commitments, product warranty, share-based compensation costs, provision for income taxes, deferred income tax asset valuation allowances, uncertain tax positions, goodwill, intangible assets, investments, contingent consideration liabilities, and loss contingencies. We base our estimates on historical experience, applicable laws and regulations, and various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.
Foreign Currency Transaction Gains and Losses	Foreign Currency Transaction Gains and Losses
	We use the U.S. dollar as our functional currency for financial reporting and therefore foreign currency transaction and remeasurement gains and losses are included in results of operations and are primarily the result of revaluing assets and liabilities denominated in a currency other than the functional currency. These foreign currency transactions, which primarily related to a recent acquisition, resulted in a net gain of $15.1 million in the three months ended December 31, 2014, and were not material in prior periods.

Net_Income_Per_Share_Tables

Net Income Per Share (Tables)	6 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Computation of Basic and Diluted Net Income Per Share	The computation of basic and diluted net income per share was as follows (in thousands, except per share data):
		Three Months Ended				Six Months Ended
		December 31,				December 31,
		2014		2013		2014		2013
	Numerator:
	Net income	$	19,972	$	17,334	$	46,558	$	52,273
	Denominator:
	Shares, basic		36,500		33,990		36,895		33,475
	Effect of dilutive share-based awards		1,748		2,069		1,987		2,111
	Shares, diluted		38,248		36,059		38,882		35,586
	Net income per share:
	Basic	$	0.55	$	0.51	$	1.26	$	1.56
	Diluted	$	0.52	$	0.48	$	1.2	$	1.47

Fair_Value_Tables

Fair Value (Tables)	6 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Measured at Fair Value on Recurring Basis	Financial assets and liabilities, measured at fair value on a recurring basis by level within the fair value hierarchy, consisted of the following (in thousands):
		December 31,					June 30,
		2014					2014
		Level 1			Level 3		Level 1		Level 3
	Assets:
	Money market funds	$	133,061		$	—	$	439,675	$	—
	Auction rate securities		—			15,278		—		19,785
	Total available-for-sale securities	$	133,061		$	15,278	$	439,675	$	19,785
	Liabilities:
	Contingent consideration liabilities recorded for business combinations	$	—		$	69,306	$	—	$	110,122
Changes in Fair Value of Level 3 Financial Assets	Changes in fair value of our Level 3 financial assets as of December 31, 2014 were as follows (in thousands):
	Balance as of June 30, 2014	$	19,785
	Net gain		393
	Redemptions		(4,900	)
	Balance as of December 31, 2014	$	15,278
Changes in Fair Value of Level 3 Contingent Consideration Liability	Changes in fair value of our Level 3 contingent consideration liabilities as of December 31, 2014 were as follows (in thousands):
	Balance as of June 30, 2014	$	110,122
	Cash settlement of contingent consideration liability		(7,706	)
	Issuance of common stock in settlement of liability		(21,487	)
	Accretion and remeasurement		(11,623	)
	Balance as of December 31, 2014	$	69,306

Noncurrent_Investments_Tables

Non-current Investments (Tables)	6 Months Ended
	Dec. 31, 2014
Investments, All Other Investments [Abstract]
ARS Investments	The various types of ARS investments we held as of December 31, 2014, including the original cost basis, other-than-temporary impairment included in retained earnings, new cost basis, unrealized gain/(loss), and fair value, consisted of the following (in thousands):
			Original Cost		Other-than-			New Cost		Unrealized			Fair
			Basis		temporary			Basis		Gain/(Loss)			Value
					Impairment in
					Retained Earnings
	Credit linked notes		$	13,500	$	(6,844	)(1)	$	6,656	$	5,284		$	11,940
	Preferred stock			5,000		(5,000	)		—		2,750			2,750
	Municipals			600		(83	)		517		71			588
	Total ARS		$	19,100	$	(11,927	)	$	7,173	$	8,105		$	15,278
	-1	Other-than-temporary impairment in retained earnings is partially offset by cumulative accretion of $1.9 million on non-current investments. Accretion is reclassified from accumulated other comprehensive income and recorded in the condensed consolidated statements of income as non-cash interest income.
	The various types of ARS investments we held as of June 30, 2014, including the original cost basis, other-than-temporary impairment included in retained earnings, new cost basis, unrealized gain/(loss), and fair value, consisted of the following (in thousands):
			Original Cost		Other-than-			New Cost		Unrealized			Fair
			Basis		temporary			Basis		Gain/(Loss)			Value
					Impairment in
					Retained Earnings
	Student loans		$	3,500	$	(179	)	$	3,321	$	(149	)	$	3,172
	Credit linked notes			13,500		(7,513	)(1)		5,987		5,891			11,878
	Preferred stock			5,000		(5,000	)		—		2,750			2,750
	Municipals			2,000		(83	)		1,917		68			1,985
	Total ARS		$	24,000	$	(12,775	)	$	11,225	$	8,560		$	19,785
	-1	Other-than-temporary impairment in retained earnings is partially offset by cumulative accretion of $1.3 million on non-current investments. Accretion is reclassified from accumulated other comprehensive income and recorded in the condensed consolidated statements of income as non-cash interest income.

Inventories_Tables

Inventories (Tables)	6 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Inventories	Inventories are stated at the lower of cost (first-in, first-out method) or market (estimated net realizable value) and consisted of the following (in thousands):
		December 31,		June 30,
		2014		2014
	Raw materials	$	75,089	$	58,717
	Finished goods		70,126		23,594
		$	145,215	$	82,311

Acquisition_Tables

Acquisition (Tables)	6 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Summary of Provisional Amounts Recorded for Estimated Fair Values of Assets Acquired and Liabilities Assumed as of Acquisition Date	The following table summarizes the provisional amounts recorded for the estimated fair values of the assets acquired and liabilities assumed as of the acquisition date (in thousands):
	Cash	$	54,705
	Short-term deposit		36,614
	Accounts receivable		140,210
	Current deferred tax asset		2,762
	Inventory		6,296
	Property and equipment		11,674
	Acquired intangible assets		250,600
	Other assets		4,002
	Total identifiable assets acquired		506,863
	Accounts payable		66,544
	Income taxes payable		32,534
	Deferred tax liability		59,516
	Other accrued liabilities		28,032
	Net identifiable assets acquired		320,237
	Goodwill		153,413
	Net assets acquired	$	473,650
Summary of Financial Information Presents Combined Results of Operations for Acquisition	The following unaudited pro forma financial information presents the combined results of operations for us and RSP as if the RSP Acquisition had occurred on June 30, 2013. The unaudited pro forma financial information has been prepared for comparative purposes only and does not purport to be indicative of the actual operating results that would have been recorded had the RSP Acquisition actually taken place on June 30, 2013, and should not be taken as indicative of future consolidated operating results. Additionally, the unaudited pro forma financial results do not include any anticipated synergies or other expected benefits from the acquisition.
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2014			2013			2014			2013
		(in thousands, except per share data)
	Revenue	$	463,705		$	399,301		$	957,407		$	808,704
	Net income		39,612			35,466			82,054			73,313
	Net income per share - diluted		1.04			0.98			2.11			2.06
Pro Forma Adjustments Used to Arrive at Pro Forma Net Income	Pro forma adjustments used to arrive at pro forma net income for the three and six months ended December 31, 2014 and December 31, 2013, were as follows (in thousands):
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2014			2013			2014			2013
	Buyer transaction costs	$	3,000		$	18		$	4,300		$	18
	Amortization of debt issuance costs		—			(250	)		(250	)		(500	)
	Interest expense		—			(1,561	)		(2,852	)		(2,828	)
	Intangible amortization		26,000			(19,319	)		13,131			(58,188	)
	Income tax adjustment		(9,360	)		6,955			(4,727	)		20,948
	Total	$	19,640		$	(14,157	)	$	9,602		$	(40,550	)

Acquired_Intangibles_Tables

Acquired Intangibles (Tables)	6 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Life, Gross Carrying Value of Acquired Intangible Assets, and Related Accumulated Amortization	The following table summarizes the life, the gross carrying value of our acquired intangible assets, and the related accumulated amortization as of December 31, 2014 and June 30, 2014 (in thousands):
		Life		December 31,			June 30,
				2014			2014
	Display driver developed technology	5 years		$	138,550		$	—
	Fingerprint developed technology	2-4 years			75,650			18,650
	ThinTouch developed technology	7 years			8,900			8,900
	Customer relationships	2-5 years			64,000			3,800
	Licensed technology and other	5 years			1,335			1,335
	Backlog	Less than 1 year			11,700			750
	Patents	5 years			100			100
	Supplier arrangement	Less than 1 year			21,500			—
	In-process research and development	Not applicable			19,400			57,000
					341,135			90,535
	Accumulated amortization				(57,786	)		(8,424	)
	Acquired intangibles, net			$	283,349		$	82,111
Schedule of Expected Annual Aggregate Amortization Expense	The following table presents expected annual fiscal year aggregate amortization expense as of December 31, 2014 (in thousands):
	Remainder of 2015	$	44,648
	2016		72,851
	2017		60,731
	2018		46,095
	2019		30,948
	2020		8,199
	Thereafter		477
	To be determined		19,400
	Future amortization	$	283,349

Other_Accrued_Liabilities_Tabl

Other Accrued Liabilities (Tables)	6 Months Ended
	Dec. 31, 2014
Payables and Accruals [Abstract]
Other Accrued Liabilities	Other accrued liabilities consisted of the following (in thousands):
		December 31,		June 30,
		2014		2014
	Customer obligations	$	59,372	$	38,758
	Inventory obligations		15,832		4,096
	Warranty		2,759		1,659
	Other		16,470		12,178
		$	94,433	$	56,691

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	6 Months Ended
	Dec. 31, 2014
Share-Based Compensation and Related Tax Benefit Recognized in Condensed Consolidated Statements of Income	Share-based compensation and the related tax benefit recognized in our condensed consolidated statements of income were as follows (in thousands):
		Three Months Ended					Six Months Ended
		December 31,					December 31,
		2014			2013		2014		2013
	Cost of revenue	$	336		$	262	$	638	$	516
	Research and development		5,950			4,241		11,350		8,168
	Selling, general, and administrative		4,442			3,119		8,235		5,980
	Total	$	10,728		$	7,622	$	20,223	$	14,664
	Income tax benefit on share-based compensation	$	3,045		$	2,834	$	5,731	$	4,806
Balance of Outstanding and Exercisable Stock Options	Stock option activity, including stock options granted, exercised, and forfeited, and weighted average exercise prices for stock options outstanding and exercisable, and the aggregate intrinsic value were as follows:
		Stock			Weighted		Aggregate
		Option			Average		Intrinsic
		Awards			Exercise		Value
		Outstanding			Price		(in thousands)
	Balance at June 30, 2014		3,693,375		$	30.08
	Granted		261,991			68.87
	Exercised		(375,730	)		29.21
	Forfeited		(25,363	)		39.82
	Balance at December 31, 2014		3,554,273			32.96	$	138,860
	Exercisable at December 31, 2014		2,568,671			26.77	$	115,729
Shares Purchased, Weighted Average Purchase Price, Cash Received, and Aggregate Intrinsic Value for ESPP	Shares purchased, weighted average purchase price, cash received, and the aggregate intrinsic value for employee stock purchase plan purchases during the six-month period ended December 31, 2014 were as follows (in thousands, except for shares purchased and weighted average price):
	Shares purchased		230,241
	Weighted average purchase price	$	25.46
	Cash received	$	5,862
	Aggregate intrinsic value	$	8,390
Deferred Stock Units Outstanding [Member]
Balance and Aggregate Intrinsic Value of Stock Units	Deferred Stock Units, or DSU, activity, including DSUs granted, delivered, and forfeited, and the balance and aggregate intrinsic value of DSUs was as follows:
		DSU Awards			Aggregate
					Intrinsic
					Value
		Outstanding			(in thousands)
	Balance at June 30, 2014		1,058,243
	Granted		312,293
	Delivered		(264,784	)
	Forfeited		(39,829	)
	Balance at December 31, 2014		1,065,923		$	76,533
Market Stock Units Outstanding [Member]
Balance and Aggregate Intrinsic Value of Stock Units	During the six months ended December 31, 2014, MSU activity, including MSUs granted, delivered, and forfeited, and the balance and aggregate intrinsic value of MSUs as of December 31, 2014 was as follows:
		MSU			Aggregate
		Awards			Intrinsic
					Value
		Outstanding			(in thousands)
	Balance at June 30, 2014		120,330
	Granted		70,300
	Performance adjustment		46,712
	Delivered		-93,424
	Forfeited		—
	Balance at December 31, 2014		143,918		$	10,333

Segment_Customers_and_Geograph1

Segment, Customers, and Geographic Information (Tables)	6 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Net Revenue within Geographic Areas Based on Customers' Locations	Net revenue within geographic areas based on our customers’ locations for the periods presented was as follows (in thousands):
			Three Months Ended						Six Months Ended
			December 31,						December 31,
			2014			2013			2014			2013
	China		$	126,251		$	110,570		$	274,421		$	217,936
	Japan			231,271			10,386			237,007			22,466
	United States			37,475			2,070			78,227			3,772
	Taiwan			32,194			34,068			68,430			66,369
	South Korea			31,975			48,669			78,816			117,827
	Other			4,539			—			9,545			—
			$	463,705		$	205,763		$	746,446		$	428,370
Net Revenue from External Customers	Net revenue from external customers for each group of similar products was as follows (in thousands):
			Three Months Ended						Six Months Ended
			December 31,						December 31,
			2014			2013			2014			2013
	Mobile product applications		$	398,308		$	133,604		$	598,042		$	296,268
	PC product applications			65,397			72,159			148,404			132,102
			$	463,705		$	205,763		$	746,446		$	428,370
Major Customers' as Percentage of Net Revenue	Net revenue from major customers as a percentage of total net revenue for the periods presented was as follows:
			Three Months Ended						Six Months Ended
			December 31,						December 31,
			2014			2013			2014			2013
	Customer A			24	%		*			15	%		*
	Customer B			13	%		18	%		17	%		20	%
	Customer C			12	%		*			*			*
	Customer D			12	%		*			*			*
	Customer E			*			11	%		*			*
	*	Less than 10%
Major Customer Accounts Receivable as Percentage of Accounts Receivable	Major customer accounts receivable as a percentage of total accounts receivable at the dates presented were as follows:
			December 31,			June 30,
			2014			2014
	Customer A			16	%		*
	Customer B			14	%		*
	Customer C			11	%		*
	Customer D			10	%		*
	Customer E			*			28	%
	*	Less than 10%

Basis_of_Presentation_Addition

Basis of Presentation - Additional Information (Detail) (USD $)	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Net gain on foreign currency transactions, which primarily related to recent acquisition	$15,100,000	$0

Net_Income_Per_Share_Computati

Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Numerator:
Net income	$19,972	$17,334	$46,558	$52,273
Denominator:
Shares, basic	36,500	33,990	36,895	33,475
Effect of dilutive share-based awards	1,748	2,069	1,987	2,111
Shares, diluted	38,248	36,059	38,882	35,586
Net income per share:
Basic	$0.55	$0.51	$1.26	$1.56
Diluted	$0.52	$0.48	$1.20	$1.47

Net_Income_Per_Share_Additiona

Net Income Per Share - Additional Information (Detail) (Share-Based Awards [Member])	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Share-Based Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common shares that were not included in computation of diluted net income per share	532,982	315,275	332,892	317,438

Fair_Value_Financial_Assets_an

Fair Value - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring [Member], USD $)	Dec. 31, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities	$133,061	$439,675
Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities	133,061	439,675
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities	15,278	19,785
Contingent consideration liabilities recorded for business combinations	69,306	110,122
Level 3 [Member] | Auction Rate Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities	$15,278	$19,785

Fair_Value_Additional_Informat

Fair Value - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Fair Value Disclosures [Line Items]
Transfer amount of assets or liabilities of level one	$0	$0	$0	$0
Transfer amount of assets or liabilities of level two	0	0	0	0
Transfer amount of assets or liabilities of level three	0	0	0	0
Validity Sensors, Inc [Member]
Fair Value Disclosures [Line Items]
Additional consideration	130,900,000		130,900,000
Pacinian [Member]
Fair Value Disclosures [Line Items]
Additional consideration paid to former stockholders based on sales of products, due	10,000,000		10,000,000
Prepaid Expenses and Other Current Assets [Member] | Auction Rate Securities [Member]
Fair Value Disclosures [Line Items]
Current Portion of Investments	$600,000		$600,000

Fair_Value_Changes_in_Fair_Val

Fair Value - Changes in Fair Value of Level 3 Financial Assets (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Beginning balance	$19,785
Net gain	393
Redemptions	-4,900
Ending balance	$15,278

Fair_Value_Changes_in_Fair_Val1

Fair Value - Changes in Fair Value of Level 3 Contingent Consideration Liability (Detail) (Level 3 [Member], USD $)	6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$110,122
Cash settlement of contingent consideration liability	-7,706
Issuance of common stock in settlement of liability	-21,487
Accretion and remeasurement	-11,623
Ending balance	$69,306

Noncurrent_Investments_Additio

Non-current Investments - Additional Information (Detail) (USD $)	6 Months Ended
	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Auction Rate Securities with fair value maturing from 2016 to 2018	12,500,000
Auction Rate Securities with fair value having no stated maturity	2,800,000
ARS investments, investment grade	600,000
ARS investments, below investment grade	18,500,000
Minimum [Member]
Schedule of Available-for-sale Securities [Line Items]
Maturity period one	2016
Maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Maturity period one	2018
Auction Rate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
ARS investments redeemed at par	4,900,000

Noncurrent_Investments_ARS_Inv

Non-current Investments - ARS Investments (Detail) (Auction Rate Securities [Member], USD $)	Dec. 31, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Original Cost Basis	$19,100	$24,000
Other-than- temporary Impairment in Retained Earnings	-11,927	-12,775
New Cost Basis	7,173	11,225
Unrealized Gain/(Loss)	8,105	8,560
Fair Value	15,278	19,785
Student Loans [Member]
Schedule of Available-for-sale Securities [Line Items]
Original Cost Basis		3,500
Other-than- temporary Impairment in Retained Earnings		-179
New Cost Basis		3,321
Unrealized Gain/(Loss)		-149
Fair Value		3,172
Credit Linked Notes [Member]
Schedule of Available-for-sale Securities [Line Items]
Original Cost Basis	13,500	13,500
Other-than- temporary Impairment in Retained Earnings	-6,844	-7,513
New Cost Basis	6,656	5,987
Unrealized Gain/(Loss)	5,284	5,891
Fair Value	11,940	11,878
Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Original Cost Basis	5,000	5,000
Other-than- temporary Impairment in Retained Earnings	-5,000	-5,000
Unrealized Gain/(Loss)	2,750	2,750
Fair Value	2,750	2,750
Municipals [Member]
Schedule of Available-for-sale Securities [Line Items]
Original Cost Basis	600	2,000
Other-than- temporary Impairment in Retained Earnings	-83	-83
New Cost Basis	517	1,917
Unrealized Gain/(Loss)	71	68
Fair Value	$588	$1,985

Noncurrent_Investments_ARS_Inv1

Non-current Investments - ARS Investments (Parenthetical) (Detail) (USD $)	Dec. 31, 2014	Jun. 30, 2014
In Millions, unless otherwise specified
Investments, Debt and Equity Securities [Abstract]
Investment securities accretion	$1.90	$1.30

Inventories_Inventories_Detail

Inventories - Inventories (Detail) (USD $)	Dec. 31, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]
Raw materials	$75,089	$58,717
Finished goods	70,126	23,594
Total Inventories	$145,215	$82,311

Acquisitions_Additional_Inform

Acquisitions - Additional Information (Detail)

3 Months Ended

6 Months Ended

0 Months Ended

6 Months Ended

6 Months Ended

6 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Oct. 01, 2014

Oct. 01, 2014

Dec. 31, 2014

Oct. 01, 2014

Oct. 01, 2014

Dec. 31, 2014

Oct. 01, 2014

Oct. 01, 2014

Oct. 01, 2014

Oct. 01, 2014

Oct. 01, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2014

USD ($)

USD ($)

USD ($)

USD ($)

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Renesas SP Drivers Inc [Member]

Customer Relationships [Member]

Customer Relationships [Member]

Supplier Arrangement [Member]

Backlog [Member]

USD ($)

JPY (¥)

USD ($)

USD ($)

JPY (¥)

Developed Technology [Member]

Developed Technology [Member]

Customer Relationships [Member]

Supplier Arrangement [Member]

In-Process Research and Development [Member]

Backlog [Member]

Renesas Electronics Corporation [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Customer Relationships [Member]

Customer Relationships [Member]

Supplier Arrangement [Member]

Backlog [Member]

Business Acquisition [Line Items]

Acquisition closing effective date

1-Oct-14

Initial purchase price of acquisition

$463,000,000

¥ 50,600,000,000

Foreign currency exchange rate (Japanese yen to U.S. dollar)

109.4

109.4

Indemnification hold back

66,000,000

7,250,000,000

Working capital hold back

48,000,000

5,250,000,000

Outstanding capital stock

100.00%

100.00%

Additional purchase price consideration

10,900,000

Fair value of the consideration transferred totaled

474,000,000

Inventory purchase obligation settled

6,296,000

115,000,000

Intangible assets acquired

250,600,000

138,600,000

60,200,000

21,500,000

19,400,000

11,000,000

Finite lived intangible assets weighted average useful life

2 years

5 years

1 year

1 year

5 years

2 years

3 years

1 year

1 year

Identified intangible assets included discount rates

9.00%

14.00%

Net revenue

463,705,000

205,763,000

746,446,000

428,370,000

238,600,000

Operating income

$28,470,000

$22,078,000

$64,701,000

$69,271,000

$16,500,000

Acquisitions_Summary_of_Provis

Acquisitions - Summary of Provisional Amounts Recorded for Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) (USD $)	Dec. 31, 2014	Jun. 30, 2014	Oct. 01, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill	$214,443	$61,030
Renesas SP Drivers Inc [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash			54,705
Short-term deposit			36,614
Accounts receivable			140,210
Current deferred tax asset			2,762
Inventory			6,296
Property and equipment			11,674
Acquired intangible assets			250,600
Other assets			4,002
Total identifiable assets acquired			506,863
Accounts payable			66,544
Income taxes payable			32,534
Deferred tax liability			59,516
Other accrued liabilities			28,032
Net identifiable assets acquired			320,237
Goodwill			153,413
Net assets acquired			$473,650

Acquisitions_Summary_of_Financ

Acquisitions - Summary of Financial Information Presents Combined Results of Operations for Acquisition (Detail) (Renesas SP Drivers Inc [Member], USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Renesas SP Drivers Inc [Member]
Business Acquisition [Line Items]
Revenue	$463,705	$399,301	$957,407	$808,704
Net income	$39,612	$35,466	$82,054	$73,313
Net income per share - diluted	$1.04	$0.98	$2.11	$2.06

Acquisitions_Pro_Forma_Adjustm

Acquisitions - Pro Forma Adjustments Used to Arrive at Pro Forma Net Income (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Business Combinations [Abstract]
Buyer transaction costs	$3,000	$18	$4,300	$18
Amortization of debt issuance costs		-250	-250	-500
Interest expense		-1,561	-2,852	-2,828
Intangible amortization	26,000	-19,319	13,131	-58,188
Income tax adjustment	-9,360	6,955	-4,727	20,948
Total	$19,640	($14,157)	$9,602	($40,550)

Acquired_Intangibles_Summary_o

Acquired Intangibles - Summary of Life, Gross Carrying Value of Acquired Intangible Assets, and Related Accumulated Amortization (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Jun. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$341,135	$90,535
Accumulated amortization	-57,786	-8,424
Acquired intangibles, net	283,349	82,111
Display Driver Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	138,550
Useful Life	5 years
Fingerprint Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	75,650	18,650
Thin Touch Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	8,900	8,900
Useful Life	7 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	64,000	3,800
Licensed Technology and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	1,335	1,335
Useful Life	5 years
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	11,700	750
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	100	100
Useful Life	5 years
In-Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	19,400	57,000
Supplier Arrangement [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$21,500
Minimum [Member] | Fingerprint Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	2 years
Minimum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	2 years
Maximum [Member] | Fingerprint Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	4 years
Maximum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	5 years
Maximum [Member] | Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	1 year
Maximum [Member] | Supplier Arrangement [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	1 year

Acquired_Intangibles_Additiona

Acquired Intangibles - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Acquired intangibles amortization	$45,100	$1,900	$49,362	$2,119

Acquired_Intangibles_Schedule_

Acquired Intangibles - Schedule of Expected Annual Aggregate Amortization Expense (Detail) (USD $)	Dec. 31, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2015	$44,648
2016	72,851
2017	60,731
2018	46,095
2019	30,948
2020	8,199
Thereafter	477
To be determined	19,400
Acquired intangibles, net	$283,349	$82,111

Other_Accrued_Liabilities_Othe

Other Accrued Liabilities - Other Accrued Liabilities (Detail) (USD $)	Dec. 31, 2014	Jun. 30, 2014
In Thousands, unless otherwise specified
Payables and Accruals [Abstract]
Customer obligations	$59,372	$38,758
Inventory obligations	15,832	4,096
Warranty	2,759	1,659
Other	16,470	12,178
Other accrued liabilities	$94,433	$56,691

Product_Warranties_Indemnifica1

Product Warranties, Indemnifications, and Contingencies - Additional Information (Detail)	6 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Minimum warranty period of products	12 months

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Debt Instrument [Line Items]
Debt issuance cost	$5
Debt amortization period	60 months
Percentage of voting capital stock	65.00%
Description of Base Rate	The revolving credit facility and term loans bear interest at our election of a Base Rate plus an applicable margin or LIBOR plus an applicable margin. Swingline loans bear interest at a Base Rate plus an applicable margin. The Base Rate is a floating rate that is the greater of the Prime Rate, the Federal Funds Rate plus 50 basis points, or LIBOR plus 100 basis points. The applicable margin is based on a sliding scale which ranges from zero to 100 basis points for Base Rate loans and 100 basis points to 200 basis points for LIBOR loans.
Description of periodic payments	The term loan facility requires repayment over five years with nineteen quarterly principal payments beginning in the three months ending March 31, 2015.
Quarterly payment beginning period	31-Mar-15
Final principal payment	90
Revolving credit facility maturity period	30-Sep-19
Operating covenant description	Under the Credit Agreement, there are restrictive operating covenants, including three financial covenants which limit; the consolidated total leverage ratio, or leverage ratio; the consolidated interest coverage ratio, or interest coverage ratio; and places a restriction on the amount of capital expenditures that may be made in any fiscal year. The leverage ratio is the ratio of debt as of the measurement date to earnings before interest, taxes, depreciation and amortization, or EBITDA, for the four consecutive quarters ending with the quarter of measurement. The leverage ratio must not exceed 2.50 to 1.0 during the first two years of the agreement, and 2.0 to 1.0 during the last three years of the agreement. The interest coverage ratio is EBITDA to interest expense for the four consecutive quarters ending with the quarter of measurement. The interest coverage ratio must not be less than 3.50 to 1.0 during the term of the agreement.
Federal Funds Effective Swap Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Base Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.00%
Base Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility amount	150
Increase in Line of credit facility	100
Amount borrowed under revolving credit facility	100
Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Commitment fee percentage of unused portion	0.25%
Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Commitment fee percentage of unused portion	0.45%
Term Loan [Member]
Debt Instrument [Line Items]
Line of credit facility amount	150
Amount borrowed under revolving credit facility	150
First Four Quarters [Member]
Debt Instrument [Line Items]
Quarterly principal payment	1.9
Next Fourteen Quarters [Member]
Debt Instrument [Line Items]
Quarterly principal payment	3.8
Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility amount	20
Bridge Loan [Member]
Debt Instrument [Line Items]
Line of credit facility amount	$20

ShareBased_Compensation_ShareB

Share-Based Compensation - Share-Based Compensation and Related Tax Benefit Recognized in Condensed Consolidated Statements of Income (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	$10,728	$7,622	$20,223	$14,664
Income tax benefit on share-based compensation	3,045	2,834	5,731	4,806
Cost of Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	336	262	638	516
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	5,950	4,241	11,350	8,168
Selling, General, and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	$4,442	$3,119	$8,235	$5,980

ShareBased_Compensation_Balanc

Share-Based Compensation - Balance of Outstanding and Exercisable Stock Options (Detail) (USD $)	6 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Option Awards Outstanding, Balance at June 30, 2014	3,693,375
Stock Option Awards Outstanding, Granted	261,991
Stock Option Awards Outstanding, Exercised	-375,730
Stock Option Awards Outstanding, Forfeited	-25,363
Stock Option Awards Outstanding, Balance at December 31, 2014	3,554,273
Stock Option Awards Outstanding, Exercisable at December 31, 2014	2,568,671
Weighted Average Exercise Price, Balance at June 30, 2014	$30.08
Weighted Average Exercise Price, Granted	$68.87
Weighted Average Exercise Price, Exercised	$29.21
Weighted Average Exercise Price, Forfeited	$39.82
Weighted Average Exercise Price, Balance at December 31, 2014	$32.96
Weighted Average Exercise Price, Exercisable at December 31, 2014	$26.77
Aggregate Intrinsic Value of Stock Option Awards, Balance at December 31, 2014	$138,860
Aggregate Intrinsic Value of Stock Option Awards, Exercisable at December 31, 2014	$115,729

ShareBased_Compensation_Additi

Share-Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2014	Dec. 26, 2014
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value of stock option outstanding calculated using the closing price of common stock			$71.80
Deferred Stock Units Outstanding [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value of stock option outstanding calculated using the closing price of common stock			$71.80
Shares withheld to meet statutory minimum tax withholding requirements		74,568
Shares valued withheld to meet statutory minimum tax withholding requirements		$5.20
Market Stock Units Outstanding [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value of stock option outstanding calculated using the closing price of common stock			$71.80
Shares withheld to meet statutory minimum tax withholding requirements		47,883
Shares valued withheld to meet statutory minimum tax withholding requirements		3
Vesting period, tranche one		1 year
Vesting period, tranche two		2 years
Vesting period, tranche three		3 years
Potential payout adjustment ratio		2
Unrecognized share-based compensation cost	$7.70	$7.70
Unrecognized share-based compensation, period for recognition	1 year 5 months 9 days
Market Stock Units Outstanding [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential payout range		0.00%
Market Stock Units Outstanding [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential payout range		200.00%
Market Stock Units Outstanding [Member] | Maximum [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential payout range		100.00%
Market Stock Units Outstanding [Member] | Maximum [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential payout range		100.00%

ShareBased_Compensation_Balanc1

Share-Based Compensation - Balance and Aggregate Intrinsic Value of Stock Units (Detail) (USD $)	6 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014
Market Stock Units Outstanding [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Unit Awards Outstanding, Balance at June 30, 2014	120,330
Stock Unit Awards, Granted	70,300
Stock Unit Awards, Performance adjustment	46,712
Stock Unit Awards, Delivered	-93,424
Stock Unit Awards Outstanding, Balance at December 31, 2014	143,918
Aggregate Intrinsic Value, Balance at December 31, 2014	$10,333
Deferred Stock Units Outstanding [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Unit Awards Outstanding, Balance at June 30, 2014	1,058,243
Stock Unit Awards, Granted	312,293
Stock Unit Awards, Delivered	-264,784
Stock Unit Awards, Forfeited	-39,829
Stock Unit Awards Outstanding, Balance at December 31, 2014	1,065,923
Aggregate Intrinsic Value, Balance at December 31, 2014	$76,533

ShareBased_Compensation_Shares

Share-Based Compensation - Shares Purchased, Weighted Average Purchase Price, Cash Received, and Aggregate Intrinsic Value for ESPP (Detail) (USD $)	6 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value	$138,860
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares purchased	230,241
Weighted average purchase price	$25.46
Cash received	5,862
Aggregate intrinsic value	$8,390

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Effective tax rate	39.00%	27.20%
Provision for income taxes	$7,783,000	$5,215,000	$18,052,000	$17,895,000
Gross unrecognized tax benefits	11,600,000		11,600,000		10,200,000
Gross unrecognized tax benefits increased during the year			1,400,000
Interest and penalties accrued related to unrecognized tax benefits	1,100,000		1,100,000
Increase in interest and penalties accrued related to unrecognized tax benefits			$116,000

Segment_Customers_and_Geograph2

Segment, Customers, and Geographic Information - Additional Information (Detail)	6 Months Ended
	Dec. 31, 2014
	Product
	Segment
Segment Reporting [Abstract]
Number of operating segments	1
Number of product	2

Segment_Customers_and_Geograph3

Segment, Customers, and Geographic Information - Net Revenue within Geographic Areas Based on Customers' Locations (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$463,705	$205,763	$746,446	$428,370
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	126,251	110,570	274,421	217,936
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	231,271	10,386	237,007	22,466
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	37,475	2,070	78,227	3,772
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	32,194	34,068	68,430	66,369
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	31,975	48,669	78,816	117,827
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$4,539		$9,545

Segment_Customers_and_Geograph4

Segment, Customers, and Geographic Information - Net Revenue from External Customers (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Revenue from External Customer [Line Items]
Net revenue	$463,705	$205,763	$746,446	$428,370
Mobile Product Applications [Member]
Revenue from External Customer [Line Items]
Net revenue	398,308	133,604	598,042	296,268
PC Product Applications [Member]
Revenue from External Customer [Line Items]
Net revenue	$65,397	$72,159	$148,404	$132,102

Segment_Customers_and_Geograph5

Segment, Customers, and Geographic Information - Major Customers' as Percentage of Net Revenue (Detail) (Sales Revenue, Net [Member], Customer Concentration Risk [Member])	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Customer A [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue	24.00%		15.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue	13.00%	18.00%	17.00%	20.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue	12.00%
Customer D [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue	12.00%
Customer E [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue		11.00%

Segment_Customers_and_Geograph6

Segment, Customers, and Geographic Information - Major Customers' as Percentage of Net Revenue (Parenthetical) (Detail) (Customer Concentration Risk [Member], Sales Revenue, Net [Member])	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2013
Customer A [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue	24.00%	15.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue	12.00%
Customer D [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue	12.00%
Customer E [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue			11.00%
Maximum [Member] | Customer A [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue			10.00%	10.00%
Maximum [Member] | Customer C [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue		10.00%	10.00%	10.00%
Maximum [Member] | Customer D [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue		10.00%	10.00%	10.00%
Maximum [Member] | Customer E [Member]
Revenue, Major Customer [Line Items]
Percentage of net revenue	10.00%	10.00%		10.00%

Segment_Customers_and_Geograph7

Segment, Customers, and Geographic Information - Major Customer Accounts Receivable as Percentage of Accounts Receivable (Detail) (Accounts Receivable [Member], Credit Concentration Risk [Member])	6 Months Ended	12 Months Ended
	Dec. 31, 2014	Jun. 30, 2014
Customer A [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage	16.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage	14.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage	11.00%
Customer D [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage	10.00%
Customer E [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage		28.00%

Segment_Customers_and_Geograph8

Segment, Customers, and Geographic Information - Major Customer Accounts Receivable as Percentage of Accounts Receivable (Parenthetical) (Detail) (Credit Concentration Risk [Member], Accounts Receivable [Member])	6 Months Ended	12 Months Ended
	Dec. 31, 2014	Jun. 30, 2014
Customer A [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage	16.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage	14.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage	11.00%
Customer D [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage	10.00%
Customer E [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage		28.00%
Maximum [Member] | Customer A [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage		10.00%
Maximum [Member] | Customer B [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage		10.00%
Maximum [Member] | Customer C [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage		10.00%
Maximum [Member] | Customer D [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage		10.00%
Maximum [Member] | Customer E [Member]
Revenue, Major Customer [Line Items]
Accounts receivable major customer percentage	10.00%