HomeAway Inactive 10-Q5 Nov 142014 Q3 Quarterly reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2014	Oct. 30, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Trading Symbol	'AWAY	'
Entity Registrant Name	'HOMEAWAY INC	'
Entity Central Index Key	'0001366684	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	94,310,827

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:	'	'
Cash and cash equivalents	$292,103	$324,608
Short-term investments	508,090	66,798
Accounts receivable, net of allowance for doubtful accounts of $928 and $1,038 as of September 30, 2014 and December 31, 2013, respectively	22,780	20,375
Income tax receivable	4,281	3,340
Prepaid expenses and other current assets	23,810	7,702
Restricted cash	352	1,607
Deferred tax assets	8,112	8,146
Total current assets	859,528	432,576
Property and equipment, net	49,632	39,807
Goodwill	510,103	507,611
Intangible assets, net	76,134	80,665
Restricted cash	1,561	573
Deferred tax assets	522	1,120
Other non-current assets	26,781	18,320
Total assets	1,524,261	1,080,672
Current liabilities:	'	'
Accounts payable	12,746	3,539
Income tax payable	597	1,992
Accrued expenses	47,056	54,625
Deferred revenue	172,204	151,991
Total current liabilities	232,603	212,147
Convertible senior notes, net	311,738	'
Deferred revenue, less current portion	2,802	2,983
Deferred tax liabilities	25,307	24,046
Other non-current liabilities	11,257	7,557
Total liabilities	583,707	246,733
Redeemable noncontrolling interests (see Note 9)	10,231	10,584
Stockholders' equity	'	'
Common stock: $0.0001 par value; 350,000,000 shares authorized; 94,284,311 and 92,361,069 shares issued and outstanding as of September 30, 2014 and December 31, 2013, respectively	9	9
Additional paid-in capital	1,008,632	908,632
Accumulated other comprehensive income (loss)	-13,852	-6,747
Accumulated deficit	-64,466	-78,539
Total stockholders' equity	930,323	823,355
Total liabilities and stockholders' equity	$1,524,261	$1,080,672

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]	'	'
Accounts receivable, Allowance for doubtful accounts	$928	$1,038
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	350,000,000	350,000,000
Common stock, shares issued	94,284,311	92,361,069
Common stock, shares outstanding	94,284,311	92,361,069

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue:	'	'	'	'
Listing	$96,601	$75,927	$278,459	$216,304
Other	20,511	14,221	58,591	39,916
Total revenue	117,112	90,148	337,050	256,220
Costs and expenses:	'	'	'	'
Cost of revenue (exclusive of amortization shown separately below)	16,926	13,322	50,291	40,448
Product development	20,212	15,193	56,952	42,033
Sales and marketing	42,234	28,561	117,251	83,795
General and administrative	22,995	17,525	69,467	51,643
Amortization expense	3,397	2,730	10,163	8,905
Total costs and expenses	105,764	77,331	304,124	226,824
Operating income	11,348	12,817	32,926	29,396
Other income (expense):	'	'	'	'
Interest expense	-4,373	'	-8,842	'
Interest income	552	306	1,117	848
Other expense, net	-1,434	-458	-6,452	-1,983
Total other income (expense)	-5,255	-152	-14,177	-1,135
Income before income taxes	6,093	12,665	18,749	28,261
Income tax expense	-845	-4,312	-5,909	-9,143
Net income	5,248	8,353	12,840	19,118
Less: Impact of noncontrolling interests, net of tax	336	-125	-382	-125
Net income attributable to HomeAway, Inc.	$4,912	$8,478	$13,222	$19,243
Net income per share attributable to HomeAway, Inc.:	'	'	'	'
Basic	$0.05	$0.10	$0.14	$0.23
Diluted	$0.05	$0.10	$0.14	$0.22
Weighted average number of shares outstanding:	'	'	'	'
Basic	94,106	85,452	93,507	84,805
Diluted	96,389	88,215	96,358	87,738

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income	$5,248	$8,353	$12,840	$19,118
Other comprehensive income (loss):	'	'	'	'
Foreign currency translation adjustments (net of tax)	-14,793	5,302	-6,463	559
Unrealized gain (loss) on short-term investments (net of tax)	-491	410	-642	-187
Total other comprehensive income (loss)	-15,284	5,712	-7,105	372
Less: Comprehensive loss attributable to noncontrolling interests	-515	-125	-1,233	-125
Currency translation adjustments attributable to noncontrolling interests	12	'	29	'
Comprehensive income (loss) attributable to HomeAway, Inc.	($9,509)	$14,190	$6,997	$19,615

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]
In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]
Beginning Balance, value at Dec. 31, 2013	$823,355	$9	$908,632	($6,747)	($78,539)
Beginning Balance, shares at Dec. 31, 2013	92,361,069	92,361,000	'	'	'
Issuance of stock under Company plans, net of shares withheld for taxes, value	22,827	'	22,827	'	'
Issuance of stock under Company plans, net of shares withheld for taxes, shares	'	1,923,000	'	'	'
Stock-based compensation	35,582	'	35,582	'	'
Equity component of convertible note issuance, net	87,434	'	87,434	'	'
Purchase of convertible note hedge	-85,853	'	-85,853	'	'
Sale of warrants	38,278	'	38,278	'	'
Excess tax benefits related to employee stock options	2,583	'	2,583	'	'
Other comprehensive income (loss)	-7,105	'	'	-7,105	'
Net income attributable to HomeAway, Inc.	13,222	'	-851	'	14,073
Ending Balance, value at Sep. 30, 2014	$930,323	$9	$1,008,632	($13,852)	($64,466)
Ending Balance, shares at Sep. 30, 2014	94,284,311	94,284,000	'	'	'

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities	'	'
Net income	$12,840	$19,118
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation	12,091	9,835
Amortization of intangible assets	10,163	8,905
Amortization of debt discount and transaction costs	8,720	'
Amortization of premiums on securities and other	4,288	3,102
Stock-based compensation	35,582	27,589
Excess tax benefit from stock-based compensation	-2,583	-6,237
Deferred income taxes	-435	-833
Unrealized foreign exchange (gain) loss	-6,057	665
Realized loss on foreign currency forwards	12,011	861
Changes in operating assets and liabilities, net of assets and liabilities assumed in business combinations:	'	'
Accounts receivable	-2,591	-577
Income tax receivable	-1,590	-1,399
Prepaid expenses and other assets	-4,938	-1,557
Accounts payable	6,668	-1,740
Accrued expenses	-3,394	2,982
Income tax payable	1,272	-4,708
Deferred revenue	25,392	21,023
Other non-current liabilities	3,976	967
Net cash provided by operating activities	111,415	77,996
Cash flows from investing activities	'	'
Acquisition of businesses, net of cash acquired	-17,847	-11,620
Change in restricted cash	166	-248
Purchases of intangibles and other assets	-303	-576
Purchases of non-marketable investments	-10,135	-3,667
Purchases of short-term investments	-473,331	-120,103
Proceeds from maturities and redemptions of marketable securities	23,048	37,100
Proceeds from sales of marketable securities	4,358	'
Net settlement of foreign currency forwards	-12,011	-861
Purchases of property and equipment	-20,456	-14,661
Net cash used in investing activities	-506,511	-114,636
Cash flows from financing activities	'	'
Proceeds from borrowings on convertible senior notes, net	390,978	'
Proceeds from issuance of warrants	38,278	'
Purchase of convertible note hedge	-85,853	'
Other financing activities	-919	'
Proceeds from exercise of options to purchase common stock	22,827	31,578
Excess tax benefit from stock-based compensation	2,583	6,237
Net cash provided by financing activities	367,894	37,815
Effect of exchange rate changes on cash	-5,303	1,742
Net increase (decrease) in cash and cash equivalents	-32,505	2,917
Cash and cash equivalents at beginning of period	324,608	189,478
Cash and cash equivalents at end of period	292,103	192,395
Cash paid for interest	253	'
Cash paid for taxes, net of refunds	3,727	13,660
Supplemental disclosure of noncash financing activities	'	'
Changes to redemption value of noncontrolling interests	$851	'

Description_of_Business

Description of Business	9 Months Ended
Description of Business	Sep. 30, 2014
Accounting Policies [Abstract]	'
Description of Business	'

	1. Description of Business

	HomeAway, Inc. (the “Company”) operates an online vacation rental property marketplace that enables property owners and managers to market properties available for rental to vacation travelers who rely on the Company’s websites to search for and find available properties. Property owners and managers pay listing fees to provide detailed listings of their properties on the Company’s websites and reach a broad audience of travelers seeking vacation rentals. Listing fees are typically annual subscriptions or payments on a performance basis, based on bookings or inquiries made by travelers to property owners and managers. A listing includes published detailed property listings, including photographs, descriptions, location, pricing, availability and contact information. The Company also sells, itself or through third parties, complementary products, including travel guarantees, insurance products and property management software and services. Travelers use the network of websites to search for vacation rentals that meet their desired criteria, including location, size and price. Travelers that find properties that meet their requirements through the Company’s marketplace are able to make reservations online or contact property owners and managers directly by phone or through form-based communication tools on the Company’s websites.

	The Company is a Delaware corporation headquartered in Austin, Texas.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	9 Months Ended
Summary of Significant Accounting Policies	Sep. 30, 2014
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'

	2. Summary of Significant Accounting Policies

	Basis of Presentation

	The accompanying condensed consolidated financial statements include the accounts of HomeAway, Inc. and all of its wholly and majority owned subsidiaries and have been prepared in accordance with accounting principles generally accepted in the United States, or GAAP, for interim financial reporting and applicable quarterly reporting regulations of the Securities and Exchange Commission, or the SEC. All significant intercompany transactions and balances have been eliminated in consolidation. In the opinion of the Company’s management, the accompanying interim unaudited condensed consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and include all adjustments, consisting of normal recurring adjustments and those items discussed in these Notes, necessary for a fair presentation of the Company’s financial position, as of September 30, 2014, the results of operations for the three and nine months ended September 30, 2014 and September 30, 2013, the comprehensive income for the three and nine months ended September 30, 2014 and September 30, 2013, the cash flows for the nine months ended September 30, 2014 and September 30, 2013, and the changes in stockholders’ equity for the nine months ended September 30, 2014. Certain information and disclosures normally included in the notes to the annual financial statements prepared in accordance with GAAP have been omitted from these interim condensed consolidated financial statements pursuant to the rules and regulations of the SEC. Accordingly, these unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013. Operating results for this interim period are not necessarily indicative of the results that may be expected for the year ending December 31, 2014 or for any other period.

	Use of Estimates

	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates. These differences could have a material effect on the Company’s future results of operations and financial position. Significant items subject to estimates and assumptions include certain unbilled revenues, the allowance for doubtful accounts, the fair value of short-term investments, the carrying amounts of goodwill and other indefinite-lived intangible assets, depreciation and amortization, the valuation of stock options, deferred income taxes and the fair value of noncontrolling interests.

	Fair Value of Financial Instruments

	Fair value is defined as the price that would be received from the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. To increase the comparability of fair value measures, the following hierarchy prioritizes the inputs to valuation methodologies used to measure fair value:



	Level 1:		Valuations based on quoted prices for identical assets and liabilities in active markets.

	Level 2:		Valuations based on observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data.

	Level 3:		Valuations based on unobservable inputs reflecting the Company’s own assumptions, consistent with reasonably available assumptions made by other market participants. These valuations require significant judgment.

	The following section describes the valuation methodologies used to measure certain financial assets and financial liabilities at fair value.

	Cash Equivalents, Restricted Cash and Short-Term Investments

	The Company’s cash equivalents, restricted cash and short-term investments classified as Level 1 are valued using quoted prices generated by market transactions involving identical assets. Short-term investments classified as Level 2 are valued using non-binding market consensus prices that are corroborated with observable market data; quoted market prices for similar instruments in active markets; or pricing models, such as a discounted cash flow model, with all significant inputs derived from or corroborated with observable market data. The Company did not hold any cash equivalents, restricted cash or short-term investments categorized as Level 3 as of September 30, 2014 or December 31, 2013.

	Short-term investments include time deposits, corporate bonds, municipal bonds and commercial paper and are classified as available-for-sale and reported at fair value using the specific identification method. Unrealized gains and losses are excluded from earnings and reported as a component of other comprehensive income (loss), net of related estimated tax provisions or benefits. Additionally, the Company periodically assesses whether an other than temporary impairment loss on investments has occurred due to declines in fair value or other market conditions. Declines in fair value that are considered other than temporary are recorded as an impairment in the consolidated statement of operations. The Company did not record any impairments of its investments for any of the periods presented.

	The carrying amounts of certain of the Company’s financial instruments, including cash and cash equivalents, accounts receivable, prepaid expenses and other current assets, accounts payable, accrued liabilities and deferred revenue approximate fair value because of the relatively short maturity of these instruments.

	The following table summarizes the basis used to measure certain financial assets at fair value on a recurring basis in the Company’s consolidated balance sheets at September 30, 2014 (in thousands):



			Balance as of			Quoted Prices in			Significant Other			Significant
			September 30,			Active Markets			Observable			Unobservable
			2014			for Identical			Inputs (Level 2)			Inputs
						Assets (Level 1)						(Level 3)
	Assets
	Cash equivalents
	Money market funds		$	179,094		$	179,094		$	—		$	—

	Total cash equivalents			179,094			179,094			—			—
	Restricted cash
	Time deposits			1,149			1,149			—			—

	Total restricted cash			1,149			1,149			—			—
	Short-term investments
	Time deposits			31,659			—			31,659			—
	Corporate bonds			354,753			—			354,753			—
	Municipal bonds			103,686			—			103,686			—
	Commercial paper			17,992			—			17,992			—

	Total short-term investments			508,090			—			508,090			—

	Total financial assets		$	688,333		$	180,243		$	508,090		$	—




The following table summarizes the basis used to measure certain financial assets at fair value on a recurring basis in the Company’s consolidated balance sheets at December 31, 2013 (in thousands):



		Balance as of			Quoted Prices in			Significant Other			Significant
		December 31,			Active Markets			Observable			Unobservable
		2013			for Identical			Inputs (Level 2)			Inputs
					Assets (Level 1)						(Level 3)
Assets
Cash equivalents
Money market funds		$	26,451		$	26,451		$	—		$	—

Total cash equivalents			26,451			26,451			—			—
Restricted cash
Money market funds			758			758			—			—

Total restricted cash			758			758			—			—
Short-term investments
Time deposits			2,054			—			2,054			—
Corporate bonds			33,257			—			33,257			—
Municipal bonds			31,487			—			31,487			—

Total short-term investments			66,798			—			66,798			—

Total financial assets		$	94,007		$	27,209		$	66,798		$	—


Business Segment

The Company has one operating segment consisting of various products and services related to its online marketplace of accommodation rental listings. The Company’s chief operating decision maker is considered to be the Chief Executive Officer. The chief operating decision maker allocates resources and assesses performance of the business and other activities at the single operating segment level.

Cash and Cash Equivalents

Cash and cash equivalents include investments in money market funds, corporate and municipal bonds and time deposits that are readily convertible into cash. Cash and cash equivalents are stated at cost, which approximates fair value. The Company considers all highly liquid investments purchased with an original maturity date of three months or less to be cash equivalents. Cash and cash equivalents consisted of the following at September 30, 2014 and December 31, 2013 (in thousands):



		September 30,			December 31,
		2014			2013
Demand deposit accounts		$	113,009		$	298,157
Money market funds			179,094			26,451

Total		$	292,103		$	324,608


Restricted Cash

Restricted cash of $1,913,000 and $2,180,000 at September 30, 2014 and December 31, 2013, respectively, was held in accounts owned by the Company in conjunction with property license requirements, leased office space and to secure credit card availability and reimbursable direct debits due from the Company.

Short-term Investments

Short-term investments generally consist of marketable securities that have original maturities greater than ninety days as of the date of purchase. Investments in which the Company has the ability and intent, if necessary, to liquidate in order to support its current operations, including those with contractual maturities greater than one year from the date of purchase, are classified as short-term. The Company’s investment securities are classified as available-for-sale and are presented at estimated fair value with any unrealized gains and losses included in other comprehensive income (loss).



Cash flows from purchases, sales and maturities of available-for-sale securities are classified as cash flows from investing activities and reported gross, including any related premiums or discounts. Premiums related to purchases of available-for-sale securities were $11,239,000 and $7,546,000 during the nine months ended September 30, 2014 and 2013, respectively. Fair values are based on quoted market prices. Short-term investments consisted of the following at September 30, 2014 and December 31, 2013 (in thousands):



		September 30, 2014
		Gross			Gross			Gross			Estimated
		Cost			Unrealized			Unrealized			Fair
					Gains			Losses			Value
Time deposits		$	31,660		$	—		$	(1	)	$	31,659
Corporate bonds			355,405			15			(667	)		354,753
Municipal bonds			103,693			62			(69	)		103,686
Commercial paper			17,992			—			—			17,992

Total short-term investments		$	508,750		$	77		$	(737	)	$	508,090




		December 31, 2013
		Gross			Gross			Gross			Estimated
		Cost			Unrealized			Unrealized			Fair
					Gains			Losses			Value
Time deposits		$	2,055		$	—		$	(1	)	$	2,054
Corporate bonds			33,274			33			(50	)		33,257
Municipal bonds			31,486			16			(15	)		31,487

Total short-term investments		$	66,815		$	49		$	(66	)	$	66,798


For fixed income securities that have unrealized losses as of September 30, 2014, the Company does not intend to sell any of these investments and it is not more likely than not that it will be required to sell any of these investments before recovery of the entire amortized cost basis. The Company has evaluated these fixed income securities and determined that no credit losses exist. Accordingly, the Company has determined that the unrealized losses on fixed income securities as of September 30, 2014 are temporary in nature.

The following table summarizes the contractual underlying maturities of the Company’s short-term investments at September 30, 2014 and December 31, 2013 (in thousands):



		September 30, 2014
		Less than 12			12 Months or			Total
		Months			Greater			Total
Time deposits		$	29,407		$	2,252		$	31,659
Corporate bonds			224,177			130,576			354,753
Municipal bonds			35,549			68,137			103,686
Commercial paper			17,992			—			17,992

Total short-term investments		$	307,125		$	200,965		$	508,090


		December 31, 2013
		Less than 12			12 Months or			Total
		Months			Greater			Total
Time deposits		$	500		$	1,554		$	2,054
Corporate bonds			11,164			22,093			33,257
Municipal bonds			3,031			28,456			31,487

Total short-term investments		$	14,695		$	52,103		$	66,798




Non-marketable Cost Investment

During the nine months ended September 30, 2014, the Company invested an additional $9,385,000 for a noncontrolling equity interest in a privately-held company in China. As of September 30, 2014, the total carrying value of the Company’s investment in the privately-held company was $19,498,000. The Company’s investment in the privately-held company is reported using the cost method of accounting or marked down to fair value when an event or circumstance indicates an other-than-temporary decline in value has occurred. No event or circumstance indicating an other-than-temporary decline in value of the Company’s interest in the non-marketable cost investment was identified. This investment is recorded in other non-current assets on the consolidated balance sheets.

Accounts Receivable

Accounts receivable are primarily generated from several sources. Amounts due from credit card merchants who process the Company’s credit card sales from property listings and remit the proceeds to the Company are the primary source of accounts receivable. Accounts receivable are also generated from Internet display advertising amounts due in the ordinary course of business as well as amounts due to the Company for property listings, other products purchased on account or amounts due from partners who provide products and services such as advertising the properties of our property owners and managers on their websites, insurance products and payment processing services. Accounts receivable from Internet display advertising revenue and products purchased on account are recorded at the invoiced amount and are non-interest bearing. Accounts receivable outstanding longer than the contractual payment terms are considered past due. The Company determines its allowance for doubtful accounts by estimating losses on receivables based on known troubled accounts and historical experiences of losses incurred.

Property and Equipment

Property and equipment are recorded at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the related assets. Computer equipment and purchased software are generally depreciated over three years. Furniture and fixtures are generally depreciated over five to ten years. Leasehold improvements are depreciated on a straight-line basis over the shorter of the contractual lease period or their estimated useful life. Upon disposal, property and equipment and the related accumulated depreciation are removed from the accounts and the resulting gain or loss is reflected in the statements of operations. Ordinary maintenance and repairs are charged to expense, while expenditures that extend the physical or economic life of the assets are capitalized.

The Company capitalizes certain internally developed software and website development costs. These capitalized costs were approximately $36,182,000 and $30,523,000 at September 30, 2014 and December 31, 2013, respectively, and are included in property and equipment, net, in the consolidated balance sheets. Internally developed software costs are generally depreciated over five years.

The Company recorded depreciation expense on internally developed software and website development costs as follows for the three and nine months ended September 30, 2014 and 2013 (in thousands):



		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
Depreciation expense on internally developed software and website development costs		$	1,343		$	1,008		$	3,947		$	2,760

Goodwill and Intangible Assets

Goodwill arises from business combinations and is measured as the excess of the purchase consideration over the sum of the acquisition-date fair values of tangible and identifiable intangible assets acquired, less any liabilities assumed. While the Company uses the best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date, the Company’s estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, adjustments to the assets acquired and liabilities assumed are recorded with the corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the consolidated statements of operations.

Goodwill and intangible assets deemed to have indefinite useful lives, such as certain trade names, are not amortized. Tests for impairment of goodwill and indefinite-lived intangible assets are performed on an annual basis or when events or circumstances indicate that the carrying amount may not be recoverable.



Circumstances that could trigger an impairment test outside of the annual test include but are not limited to: a significant adverse change in the business climate or legal factors; adverse cash flow trends; an adverse action or assessment by a regulator; unanticipated competition; loss of key personnel; decline in stock price; and the results of tests for recoverability of a significant asset group. The Company determined that no triggering event occurred during any of the periods presented.

For goodwill and indefinite lived intangible assets, the Company completes what is referred to as the “Step 0” analysis, which involves evaluating qualitative factors, including macroeconomic conditions, industry and market considerations, cost factors, and overall financial performance related to its goodwill and its indefinite lived intangible assets. If the Company’s “Step 0” analysis indicates that it is more likely than not that the fair value of a reporting unit or of an indefinite lived intangible asset is less than its carrying amount, then the Company would perform a quantitative two-step impairment test. The quantitative analysis compares the fair value of the Company’s reporting unit or indefinite-lived intangible assets to its carrying amount, and an impairment loss is recognized equivalent to the excess of the carrying amount over fair value. If, after assessing the totality of events or circumstances, the Company determines that it is more likely than not that the fair value of a reporting unit or indefinite lived intangible asset exceeds its carrying amount, then the quantitative impairment tests are unnecessary.

The Company performs an evaluation of goodwill and indefinite-lived intangible assets for impairment annually in the fourth quarter of its fiscal year.

The determination of whether or not goodwill or indefinite-lived intangible assets have become impaired involves a significant level of judgment. Changes in the Company’s strategy and/or market conditions could significantly impact these judgments and require adjustments to recorded amounts of goodwill or intangible assets.

No impairment of goodwill or indefinite-lived intangible assets was identified in any of the periods presented.

Identifiable intangible assets consist of trade names, customer listings, technology, domain names and contractual non-competition agreements associated with acquired businesses. Intangible assets with finite lives are amortized over their estimated useful lives on a straight-line basis and reviewed for impairment whenever events or changes in circumstances indicate that an asset’s carrying value may not be recoverable (see Note 4). The straight-line method of amortization represents the Company’s best estimate of the distribution of the economic value of the identifiable intangible assets.

Impairment of Long-lived Assets

The Company evaluates long-lived assets held for use, such as property and equipment, for impairment whenever events or changes in circumstances indicate the carrying value of an asset may not be recoverable. An impairment loss is recognized when estimated future undiscounted cash flows expected to result from the use of the asset plus net proceeds expected from disposition of the asset, if any, are less than the carrying value of the asset. When an impairment loss is recognized, the carrying amount of the asset is reduced to its estimated fair value in the period in which the determination is made. No material impairments of long-lived assets have been recorded during any of the periods presented.

Leases

The Company leases facilities in several countries around the world and certain equipment under non-cancelable lease agreements. The terms of certain lease agreements provide for rental payments on a graduated basis. Rent expense is recognized on a straight-line basis over the lease period and accrued as rent expense incurred but not paid.

Revenue Recognition

The Company recognizes revenue when persuasive evidence of an agreement exists, delivery has occurred, the sales price is fixed or determinable and collectability is reasonably assured.

The Company generates a significant portion of its revenue from customers purchasing online advertising services related to the listing of their properties for rent, primarily on a subscription basis over a fixed-term. The Company also generates revenue based on the number of traveler inquiries and reservation bookings for property listings on the Company’s websites, local and national Internet display advertisers, license of property management software and ancillary products and services.

Payments for term-based subscriptions received in advance of services being rendered are recorded as deferred revenue and recognized on a straight-line basis over the listing period.

Revenue for inquiry-based contracts are determined on a fixed fee-per-inquiry as stated in the arrangement and recognized when the service has been performed.



The Company earns commission revenue for reservations made online through its websites, which is calculated as a percentage of the value of the reservation. This revenue is earned as the services are performed or as the customers’ refund privileges lapse and is included in listing revenue in the consolidated statement of operations.

Internet display advertising revenue is generated primarily from advertisements appearing on the Company’s websites. There are several types of Internet advertisements, and the way in which advertising revenue is earned varies among them. Depending upon the terms, revenue might be earned each time an impression is delivered, each time a user clicks on an ad, each time a graphic ad is displayed, or each time a user clicks-through on the ad and takes a specified action on the destination site.

The Company sells gift cards with no expiration date to travelers and does not charge administrative fees on unused cards. There is a portion of the gift card obligation that, based on historical redemption patterns, will not be used by the Company’s customers and is not required to be remitted to relevant jurisdictions (“breakage”). At the point of sale, the Company recognizes breakage as deferred revenue and amortizes it over 48 months based on historical redemption patterns. The Company also records commission revenue for each gift card sale over the same 48-month redemption period.

Through its professional software for bed and breakfasts and professional property managers, the Company makes selected, online bookable properties available to online travel agencies and channel partners. The Company receives a percentage of the transaction value or a fee from the property manager for making this inventory available, which is recognized when earned. This revenue is included in other revenue in the consolidated statement of operations.

The Company generates revenue from the licensing of software products, the sale of maintenance agreements and the sale of hosted software solutions. For software license sales, one year of maintenance is typically included as part of the initial purchase price of the bundled offering with annual renewals of the maintenance component of the agreement following in subsequent years.

The Company recognizes revenue from the sale of perpetual licenses upon delivery, which generally occurs upon electronic transfer of the license key that makes the product available to the purchaser.

As software is usually sold with maintenance, the amount of revenue allocated to the software license is determined by estimating the fair value of the maintenance and subtracting it from the total invoice or contract amount. Vendor-specific objective evidence, or VSOE, of the fair value of maintenance services is determined by the standard published list pricing for maintenance renewals, as the Company generally charges list prices for maintenance renewals. In determining VSOE, the Company requires that a substantial majority of the selling price for maintenance services fall within a reasonably narrow pricing range. Maintenance and support revenue is recognized ratably over the term of the agreement beginning on the activation date. Amounts that have been invoiced are recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria have been met.

Sales of hosted software solutions are generally for a one-year period. Revenue is recognized on a straight-line basis over the contract term. Certain implementation services related to the hosting services are essential to the customer’s use of the hosting services. For sales of these hosting services where the Company is responsible for implementation, the Company recognizes implementation revenue ratably over the estimated period of the hosting relationship, which the Company considers to be three years. Recognition starts once the product has been made available to the customer.

Training and consulting revenue is recognized upon delivery of the training or consulting services to the end customer.

The Company accounts for sales incentives to customers as a reduction of revenue at the time that the revenue is recognized from the related product sale. The Company also reports revenue net of any sales tax collected.

Stock-Based Compensation

The cost of stock-based compensation is recognized in the financial statements based upon the estimated grant date fair value of the awards measured using the Black–Scholes valuation model. The fair value of restricted stock awards and units is determined based on the number of shares granted and the fair value of the Company’s common stock as of the grant date. Fair value is generally recognized as an expense on a straight-line basis, net of estimated forfeitures, over the employee requisite service period. When estimating forfeitures, the Company considers voluntary termination behaviors as well as trends of actual option forfeitures.

The Company uses the “with and without” approach in determining the order in which tax attributes are utilized. As a result, the Company only recognizes a tax benefit from stock-based awards in additional paid-in capital if an incremental tax benefit is realized after all other tax attributes currently available to the Company have been utilized. When tax deductions from stock-based awards are less than the cumulative book compensation expense, the tax effect of the resulting difference is charged first to additional paid-in capital to the extent of the Company’s pool of windfall tax benefits with any remainder recognized in income tax expense. The Company has determined that it has a sufficient windfall pool available and therefore no amounts have been recognized in income tax expense. In addition, the Company accounts for the indirect effects of stock-based awards on other tax attributes through the consolidated statements of operations.

The benefits of tax deductions in excess of recognized compensation costs are reported as financing cash inflows, but only when such excess tax benefits are realized by a reduction to current taxes payable.

The following table summarizes the excess tax (expense) benefit that the Company recorded for the three and nine months ended September 30, 2014 and 2013 (in thousands):



		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
Excess tax (expense) benefit from stock-based compensation		$	1,362		$	1,992		$	2,583		$	6,237

This tax benefit has been recorded as additional paid-in capital on the Company’s consolidated balance sheets.

Income Taxes

The Company recognizes income taxes using an asset and liability approach. This approach requires the recognition of deferred tax liabilities and assets for the future tax consequences of events that have been recognized in the Company’s consolidated financial statements or tax returns. The measurement of deferred taxes is based on provisions of the enacted tax law and the effects of future changes in tax laws or rates are not anticipated. A valuation allowance is recognized if, based on the weight of available evidence, it is more likely than not that some portion or all of the deferred tax asset will not be realized. Evaluating the need for an amount of a valuation allowance for deferred tax assets requires significant judgment and analysis of the positive and negative evidence available, including past operating results, estimates of future taxable income, reversals of existing taxable temporary differences and the feasibility of tax planning in order to determine whether all or some portion of the deferred tax assets will not be realized. Based on the available evidence and judgment, the Company has determined that it is more likely than not that certain loss carryforwards will not be realized; therefore, the Company has established a valuation allowance for such deferred tax assets to reduce the loss carryforward assets to amounts expected to be utilized.

The Company may be subject to income tax audits by the respective tax authorities in any or all of the jurisdictions in which the Company operates. The Company is currently undergoing an audit at its subsidiary in the United Kingdom. Significant judgment is required in determining uncertain tax positions. The Company recognizes the benefit of uncertain income tax positions only if these positions are more likely than not to be sustained. Also, the recognized income tax benefit is measured at the largest amount that is more than 50% likely of being realized. The Company adjusts these reserves in light of changing facts and circumstances, such as the closing of an audit or the refinement of an estimate. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company records interest and penalties related to unrecognized tax benefits as a component of income tax expense. The countries in which the Company may be subject to potential examination by tax authorities include Australia, Brazil, Colombia, France, Germany, Italy, the Netherlands, New Zealand, Singapore, Spain, Switzerland, Thailand, the United Kingdom and the United States.

The calculation of the Company’s tax liabilities involves the inherent uncertainty associated with the application of complex tax laws. As a multinational corporation, the Company conducts its business in many countries and is subject to taxation in many jurisdictions. The taxation of the Company’s business is subject to the application of various and sometimes conflicting tax laws and regulations as well as multinational tax conventions. The Company’s effective tax rate is highly dependent upon the geographic distribution of its worldwide earnings or losses, the tax regulations and tax rates in each geographic region, the availability of tax credits and carryforwards, and the effectiveness of its tax planning strategies. The application of tax laws and regulations is subject to legal and factual interpretation, judgment and uncertainty. Tax laws themselves are subject to change as a result of changes in fiscal policy, changes in legislation, and the evolution of regulations and court rulings. Consequently, taxing authorities may impose tax assessments or judgments against the Company that could materially impact its tax liability and/or its effective income tax rate. The Company believes it has adequately provided in its financial statements for additional taxes that it estimates may be assessed by the various taxing authorities. While the Company believes that it has adequately provided for all uncertain tax positions, amounts asserted by tax authorities could be greater or less than the Company’s accrued position. These tax liabilities, including the interest and penalties, are adjusted pursuant to a settlement with tax authorities, completion of audit, refinement of estimates or expiration of various statutes of limitation.



Foreign Currency

The functional currency of the Company’s foreign subsidiaries is generally their respective local currency. The financial statements of the Company’s international operations are translated into U.S. dollars using the exchange rate at each balance sheet date for assets and liabilities, the historical exchange rate for stockholders’ equity, and a weighted average exchange rate for each period for revenue, expenses, and gains and losses. Foreign currency translation adjustments are recorded as a separate component of stockholders’ equity. Gains and losses from foreign currency denominated transactions are recorded in other income (expense) in the Company’s consolidated statements of operations.

The following table summarizes the foreign exchange gain (loss) that the Company recorded for the three and nine months ended September 30, 2014 and 2013 (in thousands):



		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
Foreign exchange gain (loss)		$	(1,432	)	$	(482	)	$	(6,421	)	$	(1,950	)

Derivative Financial Instruments

As a result of the Company’s international operations, it is exposed to various market risks that may affect its consolidated results of operations, cash flows and financial position. These market risks include, but are not limited to, fluctuations in currency exchange rates. The Company’s primary foreign currency exposures are in Euros, British Pound Sterling and Australian Dollars. As a result, the Company faces exposure to adverse movements in currency exchange rates as the financial results of its operations are translated from local currency into U.S. dollars upon consolidation. Additionally, foreign exchange rate fluctuations on transactions denominated in currencies other than the functional currency result in gains and losses that are reflected in other income (expense) in the Company’s consolidated statements of operations.

The Company may enter into derivative instruments to hedge certain net exposures of nonfunctional currency denominated assets and liabilities, primarily related to intercompany loans, even though it does not elect to apply hedge accounting or hedge accounting does not apply. Gains and losses resulting from a change in fair value for these derivatives are reflected in the period in which the change occurs and are recognized on the consolidated statement of operations in other income (expense). Cash flows from these contracts are classified within cash flows from investing activities on the consolidated statements of cash flows.

The Company does not use financial instruments for trading or speculative purposes. The Company recognizes all derivative instruments on the balance sheet at fair value and its derivative instruments are generally short-term in duration. The Company is exposed to the risk that counterparties to derivative contracts may fail to meet their contractual obligations.

The following table shows the fair value and notional amounts of the Company’s outstanding or unsettled derivative instruments that are not designated as hedging instruments covering foreign currency exposures during the quarter ended September 30, 2014 and closing October 2, 2014 (in thousands).



Balance Sheet Caption		September 30, 2014
		Significant Other									U.S. Dollar
		Observable Inputs									Notional
		(Level 2)
		Gross Amount of			Gross Amounts			Net Amount
		Recognized			Offset in the			Presented in the
		Assets/Liabilities			Balance Sheet			Balance Sheet
Prepaid expenses and other current assets		$	10,487		$	(260	)	$	10,227		$	160,038
Accrued expenses			(447	)		260			(187	)		15,626

Total		$	10,040		$	—		$	10,040		$	175,664


In addition to the notional amounts listed above, the Company also had $158,000,000 of derivatives entered into on September 30, 2014 with a closing date of January 2, 2015.

The following table shows the fair value and notional amounts of the Company’s outstanding or unsettled derivative instruments that are not designated as hedging instruments covering foreign currency exposures during the quarter ended December 31, 2013 and closing January 2, 2014 (in thousands).



Balance Sheet Caption		December 31, 2013
		Significant Other									U.S. Dollar
		Observable Inputs									Notional
		(Level 2)
		Gross Amount of			Gross Amounts			Net Amount
		Recognized			Offset in the			Presented in the
		Assets/Liability			Balance Sheet			Balance Sheet
Prepaid expenses and other current assets		$	363		$	—		$	363		$	20,520
Accrued expenses			(979	)		—			(979	)		84,292

Total		$	(616	)	$	—		$	(616	)	$	104,812


Net Income Per Share Attributable to HomeAway, Inc.

Basic net income per share is computed by dividing net income attributable to HomeAway, Inc. by the weighted average number of common shares outstanding during the period. Diluted income per share is computed by dividing net income attributable to HomeAway, Inc. by the weighted average common shares outstanding plus potentially dilutive common shares. The dilutive effect of outstanding options, warrants and awards is reflected in diluted earnings per share by application of the treasury stock method.

Restricted stock awards provide the holder of unvested shares the right to participate in dividends declared on the Company’s common stock. Accordingly, these shares are included in the weighted average shares outstanding for the computation of basic earnings per share in periods of undistributed earnings. Restricted stock awards are excluded from the basic earnings per share in periods of undistributed losses as the holders are not contractually obligated to participate in the losses of the Company. Unvested restricted stock units do not provide the holder the right to participate in dividends declared on the Company’s common stock. Accordingly, these shares are excluded in the weighted average shares outstanding for the computation of basic earnings per share in periods of undistributed earnings or losses.

Comprehensive Income (Loss) Attributable to HomeAway, Inc.

Comprehensive income (loss) attributable to HomeAway, Inc. consists of net income (loss), cumulative foreign currency translation adjustments, unrealized gain (loss) on available-for-sale securities and comprehensive income (loss) attributable to noncontrolling interests.

Reclassifications

Certain reclassifications have been made to prior periods’ consolidated statements of operations to conform to the current period presentation. These reclassifications did not result in any change in previously reported total revenue, net income, total assets or shareholders’ equity.

Recent Accounting Pronouncements

In April 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) No. 2014-08, which is amended guidance for reporting discontinued operations and disposals of components of an entity. The amended guidance requires that a disposal representing a strategic shift that has or will have a major effect on an entity’s financial results, or a business activity classified as held for sale, should be reported as discontinued operations. This new guidance also expands the disclosure requirements for discontinued operations and adds new disclosures for individually significant dispositions that do not qualify as discontinued operations. The amended guidance is effective prospectively for fiscal years, and interim reporting periods within those years, beginning after December 15, 2014. Early adoption is permitted only for disposals that have not been previously reported. This guidance is not expected to have a material impact on the Company’s consolidated financial position or results of operations.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, requiring an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The updated standard will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. Early adoption is not permitted. The updated standard is effective for fiscal years, and interim reporting periods within those years, beginning after December 15, 2016. The Company has not yet selected a transition method and is currently evaluating the effect that the updated standard will have on its consolidated financial statements and related disclosures.



In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements – Going Concern, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern, related to the disclosures around going concern. The new standard provides guidance around management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company’s financial statements.

Business_Combinations

Business Combinations

9 Months Ended

Sep. 30, 2014

Business Combinations [Abstract]

Business Combinations

3. Business Combinations

Glad to Have You, Inc.

In March 2014, the Company acquired Glad to Have You, Inc. (“Glad To Have You”), a United States company that is the creator of a mobile guest management solution for the vacation rental industry, for cash consideration of approximately $16,791,000. The direct acquisition costs incurred by the Company were not significant to the Company’s operating results, and all such costs were expensed as incurred and included in general and administrative expenses in the consolidated statement of operations.

Of the total consideration paid, $250,000 of the cash consideration was deposited in escrow as security for the benefit of the Company against breaches of representations and warranties, covenants and certain other expressly enumerated matters by the sellers. The escrow funds not used to satisfy such seller obligations will be released to the sellers two business days following the first anniversary date of the acquisition. In addition, $250,000 of the total cash consideration was deposited in escrow as security and pending final net working capital related purchase price adjustments. The net working capital related escrow funds were released in June 2014.

The acquired goodwill primarily represents synergies associated with adding Glad To Have You’s mobile applications to the Company’s marketplace of websites to provide property owners and managers with an additional way to manage and communicate with guests during their stay. Goodwill is not deductible for tax purposes. The acquired trade name has an estimated useful life of 10 years from the date of acquisition, the developed technology has an estimated useful life of 5 years from the date of acquisition and the customer relationships have an estimated useful life of 10 years from the date of acquisition. Non-compete agreements have an estimated useful life of 3 years. The total weighted average amortization period for the intangibles acquired is 7 years.

The results of Glad To Have You have been included in the Company’s consolidated results since the acquisition date in March 2014. Pro forma results of operations related to this acquisition have not been presented since Glad To Have You’s operating results up to the date of acquisition were not material to the Company’s consolidated financial statements.

The following table summarizes the Company’s acquisition during the nine months ended September 30, 2014, with amounts shown below as fair values at the acquisition date (in thousands):

Glad to Have You, Inc.

Net tangible assets (liabilities) acquired

Cash

Deferred revenue

(65

)

Other

Total net tangible assets (liabilities) acquired

(23

)

Deferred tax liabilities

(1,653

)

Trade name

1,177

Developed technology

3,760

Customer relationships

1,643

Goodwill

11,647

Non-competition agreements

240

Purchase price

16,791

Less: Cash acquired

(25

)

Net purchase price

16,766

Tangible net assets (liabilities) were valued at their respective carrying amounts, which the Company believes approximate their current fair values at the respective acquisition dates.

The valuation of identifiable intangible assets acquired reflects management’s estimates based on, among other factors, use of established valuation methods. The value of the acquired trade names was determined using a relief from royalty method. Developed technology was valued on a combination of the income and market approach. Customer relationships were valued by projecting the estimated cash flow from the Company’s existing customer relationships. Non-competition agreements have been valued based on the present value of estimated future cash flows with and without this asset. Identifiable intangible assets with definite lives are amortized over the period of estimated benefit using the straight-line method and the estimated useful lives of three to ten years. The straight-line method of amortization represents the Company’s best estimate of the distribution of the economic value of the identifiable intangible assets. Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired.

Stayz

In December 2013, the Company acquired 100% of the outstanding stock of Stayz Pty Limited (“Stayz”), the leading online vacation rental marketplace in Australia, for total consideration of approximately $197,820,000. Consideration included $196,739,000 in cash paid directly to the sellers and $1,081,000 paid to the sellers in April 2014 based on completed working capital purchase price adjustments pursuant to the purchase agreement. The Company incurred approximately $3,802,000 in direct acquisition costs, all of which were expensed as incurred, and are included in general and administrative expenses in the consolidated statement of operations. The Company also entered into certain transitional service agreements with the prior owners of Stayz to have accounting, infrastructure and support services provided to the Company for a defined period of time in 2014. Amounts paid for these services are recorded as incurred and are included in the Company’s consolidated results as general and administrative expenses.

The following unaudited pro forma supplemental information presents an aggregated summary of the results of operations of the Company for the three and nine months ended September 30, 2013 and the year ended December 31, 2013, assuming the completion of the 2013 acquisition of Stayz occurred on January 1, 2012 (in thousands).

The unaudited pro forma supplemental information is based on estimates and assumptions that the Company believes are reasonable. Accordingly, the Company adjusted the pro forma results for quantifiable items such as direct acquisition costs, amortization of acquired intangible assets and the estimated tax provision of the pro form combined results. Further, during the quarter ended March 31, 2014 the Company revised the pro forma revenue and net income for the year ended December 31, 2013 by a decrease of $1.9 million and $1.3 million, respectively, based on adjustments of certain estimates, as the Company obtained additional information about the facts and circumstances that existed as of the acquisition date. The average foreign exchange rate during each of the presented years was used in preparing the supplemental information. The unaudited pro forma supplemental information prepared by the Company is not necessarily indicative of the results expected in future periods or the results that actually would have been realized had the acquired business and the Company been a combined company during the specified periods.

Three Months Ended

Nine Months Ended

Year Ended

September 30, 2013

December 31, 2013

Pro forma total revenue

95,796

275,241

370,620

Pro forma net income

9,693

23,637

28,687

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	9 Months Ended
Goodwill and Other Intangible Assets	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Other Intangible Assets	'
	4. Goodwill and Other Intangible Assets
	Goodwill
	Changes in the Company’s goodwill balance for the year ended December 31, 2013 and the nine months ended September 30, 2014 are summarized in the table below (in thousands):


	Balance at December 31, 2012	$	312,412
	Acquired in business combinations		198,124
	Foreign currency translation adjustment		(2,925	)

	Balance at December 31, 2013		507,611
	Acquired in business combinations		11,647
	Foreign currency translation adjustment		(9,666	)
	Post-acquisition goodwill adjustment for the Stayz acquisition		511

	Balance at September 30, 2014	$	510,103

	Pursuant to its goodwill and intangible assets accounting policy, the Company records goodwill adjustments for the effect on goodwill of changes to net assets and liabilities acquired during the measurement period (up to one year from the date of an acquisition). The goodwill arising from the Stayz acquisition was increased by $511,000 up to $178,288,000 due to certain income taxes and changes in fair value estimates derived from additional information gained during the measurement period. Goodwill adjustments were not significant to the Company’s previously reported operating results or financial position. Therefore, the Company elected not to retrospectively adjust the acquisition date accounting and instead recorded the adjustment in the nine months ended September 30, 2014.

	Intangible Assets
	The Company’s intangible assets, excluding goodwill, consist of intangible assets acquired primarily in business combinations and were recorded at their estimated fair values on the date of acquisition. The finite-lived intangible assets that are being amortized are summarized in the table below (in thousands):


					September 30, 2014							December 31, 2013
		Useful Life			Gross		Accumulated			Net		Gross		Accumulated			Net
		(Years)			Carrying		Amortization			Carrying		Carrying		Amortization			Carrying
					Amount					Amount		Amount					Amount
	Trade names and trademarks		10		$	30,915	$	(7,292	)	$	23,623	$	30,066	$	(5,050	)	$	25,016
	Developed technology		8-Feb			34,609		(25,582	)		9,027		31,513		(23,646	)		7,867
	Customer relationships		14-Jun			80,156		(45,250	)		34,906		80,510		(41,739	)		38,771
	Noncompete agreements and domain names		5-Feb			5,370		(3,821	)		1,549		5,163		(3,181	)		1,982

	Total				$	151,050	$	(81,945	)	$	69,105	$	147,252	$	(73,616	)	$	73,636

	Amortization of noncompete agreements is recorded over the term of the agreements.
	The following table summarizes the amortization expense that the Company recorded for the three and nine months ended September 30, 2014 and 2013 (in thousands):


		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2014			2013		2014			2013
	Amortization expense	$	3,397		$	2,730	$	10,163		$	8,905
	The Company has the following indefinite-lived intangible assets recorded in its consolidated balance sheet as of September 30, 2014 and December 31, 2013, respectively (in thousands):


		September 30,			December 31,
		2014			2013
	Trademarks, trade names and other	$	7,029		$	7,029

Accrued_Expenses

Accrued Expenses	9 Months Ended
Accrued Expenses	Sep. 30, 2014
Payables and Accruals [Abstract]	'
Accrued Expenses	'
	5. Accrued Expenses
	The Company’s accrued expenses are comprised of the following at September 30, 2014, and December 31, 2013 (in thousands):


		September 30,		December 31,
		2014		2013
	Compensation and related benefits	$	20,395	$	21,700
	Gift cards		4,147		6,090
	Contracting, consulting and professional fees		2,642		4,494
	Taxes		5,658		3,425
	Marketing		4,742		3,197
	Foreign exchange – forward contracts		187		979
	Traveler guarantee liability		2,194		956
	Other		7,091		13,784

	Total	$	47,056	$	54,625

Convertible_Senior_Notes

Convertible Senior Notes	9 Months Ended
Convertible Senior Notes	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Convertible Senior Notes	'
	6. Convertible Senior Notes
	Convertible Senior Notes


	(In thousands)		Par Value				Equity				Carrying Value of Convertible
							Component				Senior Notes as of
							Recorded
							at Issuance				September 30,			December 31,
											2014			2013
	0.125% Convertible Senior Notes due April 1, 2019		$	402,500			$	90,887	(1)		$	311,738		$	—

	-1	This amount represents the equity component recorded at the initial issuance of the 0.125% convertible senior notes.
	In March 2014, the Company issued at par value $402.5 million of 0.125% convertible senior notes (the “Notes”) due April 1, 2019, unless earlier purchased by the Company or converted. Interest is payable semi-annually, in arrears on April 1 and October 1 of each year commencing October 1, 2014.
	The Notes are governed by an indenture between the Company, as issuer, and U.S. Bank National Association, as trustee. The Notes are unsecured and do not contain any financial covenants or any restrictions on the payment of dividends, the incurrence of senior debt or other indebtedness, or the issuance or repurchase of securities by the Company.
	If converted, holders will receive cash and/or shares of the Company’s common stock, at the Company’s election. The Company’s intent is to settle the principal amount of the Notes in cash upon conversion. As a result, upon conversion of the Notes, only the amounts payable in excess of the principal amounts of the Notes are considered in diluted earnings per share under the treasury stock method.


			Conversion				Initial				Free
			Rate per $1,000				Conversion				Convertibility Date
			Par Value				Price per
							Share
	0.125% Senior Notes			19.1703			$	52.16				October 1, 2018
	Throughout the term of the Notes, the conversion rate may be adjusted upon the occurrence of certain events as described in the indenture governing the Notes. Holders of the Notes will not receive any cash payment representing accrued and unpaid interest upon conversion of a Note. Accrued but unpaid interest will be deemed to be paid in full upon conversion rather than cancelled, extinguished or forfeited. Holders may convert their Notes under the following circumstances:

		•		during any calendar quarter commencing after June 30, 2014, if, for at least 20 trading days during the 30 consecutive trading day period ending on the last trading day of the immediately preceding calendar quarter, the last reported sales price of the Company’s common stock for such trading day is greater than or equal to 130% of the applicable conversion price for the Notes on each applicable trading day;

		•		during the five business day period after any five consecutive trading day period in which the trading price per $1,000 principal amount of the Notes is less than 98% of the product of the sale price of the Company’s common stock and the conversion rate;

		•		upon the occurrence of specified corporate transactions described under the indenture governing the Notes, such as a consolidation, merger or binding share exchange; or

		•		at any time on or after October 1, 2018.
	As of September 30, 2014, the Notes are not yet convertible.
	Holders of the Notes have the right to require the Company to purchase with cash all or a portion of the Notes upon the occurrence of a fundamental change, such as a change of control, at a purchase price equal to 100% of the principal amount of the Notes plus accrued and unpaid interest. Following certain corporate transactions that constitute a fundamental change, the Company will increase the conversion rate for a holder who elects to convert the Notes in connection with such make-whole fundamental change.

	In accounting for the issuance of the Notes, the Company separated the Notes into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar liability that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the par value of the Notes as a whole. The excess of the principal amount of the liability component over its carrying amount (“debt discount”) is amortized to interest expense over the term of the Notes. The equity component is not remeasured as long as it continues to meet the conditions for equity classification.
	In accounting for the transaction costs related to the Note issuance, the Company allocated the total amount incurred to the liability and equity components based on their relative values. Transaction costs attributable to the liability component are being amortized to expense over the term of the Notes, and transaction costs attributable to the equity component were netted with the equity component in stockholders’ equity. Additionally, the Company recorded a deferred tax liability of $0.8 million in connection with the Notes.
	The Notes consist of the following (in thousands):


			September 30,				December 31,
			2014				2013
	Liability component:
	Principal:
	0.125% Senior Notes		$	402,500			$	—
	Less: debt discount, net
	0.125% Senior Notes			(90,762	)			—

	Net carrying amount		$	311,738			$	—

	The Notes are included in the consolidated balance sheets within Convertible senior notes, net, which are classified as a noncurrent liability. The debt discount is amortized over the life of the Notes using the effective interest rate method.
	The total estimated fair value of the Company’s Notes at September 30, 2014 was $308.0 million. The fair value of the Notes was determined based on inputs that are observable in the market (Level 2).
	Based on the closing price of the Company’s common stock of $35.50 on September 30, 2014, the if-converted value of the Notes was less than their principal amount.
	Note Hedges
	To minimize the impact of potential economic dilution upon conversion of the Notes, the Company entered into convertible note hedge transactions with respect to its common stock (the “Note Hedges”).


			Date				Purchase				Shares
							(in thousands)				underlying Note
											Hedges
	Note Hedges			March 2014			$	85,853				7,716,049
	The Note Hedges cover shares of the Company’s common stock at a strike price that corresponds to the initial conversion price of the respective Notes, also subject to adjustment, and are exercisable upon conversion of the Notes. The Note Hedges will expire upon the maturity of the Notes. The Note Hedges are intended to reduce the potential economic dilution upon conversion of the Notes in the event that the market value per share of the Company’s common stock, as measured under the Notes, at the time of exercise is greater than the conversion price of the Notes. The Note Hedges are separate transactions and are not part of the terms of the Notes. Holders of the Notes will not have any rights with respect to the Note Hedges.
	Warrants


		Date				Proceeds				Shares			Strike
		Date				(in thousands)				Shares			Price
Warrants			March 2014			$	38,278				7,716,049		$	81.14

Separately, in March 2014, the Company also entered into warrant transactions (the “Warrants”), whereby the Company sold warrants to acquire, subject to anti-dilution adjustments, shares of the Company’s common stock at $81.14 per share. The Warrants have a term of five years from the date of issuance. If the average market value per share of the Company’s common stock for the reporting period, as measured under the Warrants, exceeds the strike price of the Warrants, the Warrants would have a dilutive effect on the Company’s earnings per share if the Company reports net income for fiscal 2014. The Warrants were anti-dilutive for the period ending September 30, 2014. The Warrants are separate transactions, entered into by the Company and are not part of the terms of the Notes or Note Hedges. Holders of the Notes will not have any rights with respect to the Warrants.
Interest Expense
The following table sets forth total interest expense recognized related to the Notes (in thousands):


		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2014				2013				2014			2013
0.125% coupon		$	126			$	—			$	252		$	—
Amortization of debt issuance costs			13				—				26			—
Amortization of debt discount			4,378				—				8,694			—
Capitalized interest			(144	)			—				(144	)		—

Total		$	4,373			$	—			$	8,828		$	—

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	7. Commitments and Contingencies
	Leases
	The Company leases its facilities and certain office equipment under noncancellable operating leases.
	The following table summarizes the total rental expense that the Company recorded for the three and nine months ended September 30, 2014 and 2013 (in thousands):


		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2014			2013		2014		2013
	Rental expense	$	1,911		$	1,341	$	5,134	$	3,835
	Guarantees
	The Company offers two guarantee products to travelers: Basic Rental Guarantee and Carefree Rental Guarantee. The Basic Rental Guarantee is offered to travelers that book a vacation rental property listed on any one of the Company’s websites to protect their vacation rental payments up to $1,000 against Internet fraud. Travelers may also purchase additional protection to cover 100% of vacation rental payments up to $10,000 against Internet fraud, misrepresentation, wrongful denial of entry, wrongful deposit loss or, beginning in 2012, losses from phishing claims by the purchase of the Carefree Rental Guarantee. The Company does not maintain insurance from any third party for claims under these guarantees, and any amounts payable for claims made under these guarantees are payable by the Company. Amounts recorded for estimated future claims under the guarantees are based on historical experience and estimates of potential future claims are recorded either in cost of revenue or in general and administrative expense in the Company’s consolidated statement of operations depending on whether the expense is related to estimated claims under the Basic Rental Guarantee or to the Carefree Rental Guarantee.
	Expected future claims for traveler guarantees, which are presented as a current liability in the Company’s consolidated balance sheets, and changes for the guarantees are as follows (in thousands):


	Traveler guarantee liability at December 31, 2012	$	566
	Costs accrued for new vacation rentals		2,230
	Guarantee obligations honored		(1,840	)

	Traveler guarantee liability at December 31, 2013	$	956
	Costs accrued for new vacation rentals		3,136
	Guarantee obligations honored		(1,898	)

	Traveler guarantee liability at September 30, 2014	$	2,194


	The Company maintains a guarantee of £5,000,000 (approximately $8,109,000 as of September 30, 2014) in favor of a bank in the United Kingdom for extending credit to the Company in connection with the wholly owned United Kingdom subsidiary’s business of collecting its subscription revenue in advance via credit card payments.
	Legal
	From time to time, the Company is involved in litigation relating to claims arising in the ordinary course of business. The Company assesses its potential liability by analyzing specific litigation and regulatory matters using available information. Views on estimated losses are developed by management in consultation with inside and outside counsel, which involves a subjective analysis of potential results and outcomes, assuming various combinations of appropriate litigation and settlement strategies. After taking all of the above factors into account, the Company determines whether an estimated loss from a contingency related to litigation should be accrued by assessing whether a loss is deemed probable and can be reasonably estimated. The Company further determines whether an estimated loss from a contingency related to litigation should be disclosed by assessing whether a material loss is deemed reasonably possible. Such disclosures will include an estimate of the additional loss or range of loss or will state that such an estimate cannot be made.
	Management believes that there are no claims or actions pending or threatened against the Company, the ultimate disposition of which would have a material impact on the Company’s consolidated financial position, results of operations or cash flows.

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
Stock-Based Compensation	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Compensation	'
	8. Stock-Based Compensation
	During the three and nine months ended September 30, 2014, the Company issued an aggregate of 258,046 and 1,506,292 restricted stock units, respectively, under its 2011 Equity Incentive Plan (the “2011 Plan”), for an aggregate fair value of $8,607,000 and $54,963,000, respectively. Additionally, during the three and nine months ended September 30, 2014, the Company issued an aggregate of 139,479 and 961,634 options, respectively, to purchase common stock under the 2011 Plan for an aggregate fair value of $1,663,000 and $12,954,000, respectively.
	The following table summarizes the total stock-based compensation expense that the Company recorded for the three and nine months ended September 30, 2014 and 2013 (in thousands):


		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Cost of revenue	$	847	$	720	$	2,415	$	2,392
	Product development		3,485		2,515		9,589		6,743
	Sales and marketing		2,763		2,349		7,868		6,235
	General and administrative		5,576		4,413		15,710		12,219

	Total	$	12,671	$	9,997	$	35,582	$	27,589

Redeemable_Noncontrolling_Inte

Redeemable Noncontrolling Interests	9 Months Ended
Redeemable Noncontrolling Interests	Sep. 30, 2014
Noncontrolling Interest [Abstract]	'
Redeemable Noncontrolling Interests	'
	9. Redeemable Noncontrolling Interests
	During the year ended December 31, 2013, the Company acquired 68.5% of the outstanding stock of travelmob Pte. Ltd. and 55% of the outstanding stock of Bookabach Limited. The redeemable noncontrolling interests are reported on the Consolidated Balance Sheets in mezzanine equity in “Redeemable noncontrolling interests.”
	The Company recognizes changes to the redemption value of noncontrolling interests as they occur and adjusts the carrying value to equal the redemption value at the end of each reporting period.
	Changes in the Company’s redeemable noncontrolling interests for the year ended December 31, 2013 and the nine months ended September 30, 2014 are summarized in the table below (in thousands):


	Balance at December 31, 2012	$	—
	Fair value at acquisition		10,966
	Net loss attributable to noncontrolling interests		(395	)
	Currency translation adjustments		13

	Balance at December 31, 2013	$	10,584
	Net loss attributable to noncontrolling interests		(1,233	)
	Changes to redemption value of noncontrolling interests		851
	Currency translation adjustments		29

	Balance at September 30, 2014	$	10,231

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
Accumulated Other Comprehensive Income (Loss)	Sep. 30, 2014
Equity [Abstract]	'
Accumulated Other Comprehensive Income (Loss)	'
	10. Accumulated Other Comprehensive Income (Loss)
	Accumulated other comprehensive income (loss) consists of the following at September 30, 2014 and December 31, 2013, respectively (in thousands):


		September 30,			December 31,
		2014			2013
	Foreign currency translation	$	(13,191	)	$	(6,728	)
	Unrealized losses on short-term investments		(661	)		(19	)

	Total	$	(13,852	)	$	(6,747	)

Income_Taxes

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	11. Income Taxes
	The following table summarizes the total income tax expense that the Company recorded, and the related effective tax rate, for the three and nine months ended September 30, 2014 and 2013 (in thousands):


		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
	Income tax expense	$	845		$	4,312		$	5,909		$	9,143
	Effective tax rate		13.9	%		34	%		31.5	%		32.4	%
	At September 30, 2014, the Company’s effective tax rate estimate for the year ended December 31, 2014 differed from the statutory rate primarily due to the non-deductible stock compensation charges and state taxes, which is partially offset by the benefit of disqualifying dispositions of incentive stock options, adjustments to the recognized value of federal and Texas research and experimentation tax credit carryforwards and the effect of different statutory tax rates in foreign jurisdictions. In addition, there was a discrete tax benefit of $2.5 million recorded in the three months ended September 30, 2014 related to tax basis intangibles resulting from the merger of wholly owned subsidiaries of the Company in Spain. At September 30, 2013, the Company’s effective tax rate estimate for the year ended December 31, 2013 differed from the statutory rate primarily due to non-deductible stock compensation charges, state taxes, amortization of tax charges on the intercompany sale of assets that were deferred in prior periods, which was partially offset by the benefit of disqualifying dispositions of incentive stock options, the effect of different statutory tax rates in foreign jurisdictions, and the federal research and experimentation tax credit.

Net_Income_Per_Share_Attributa

Net Income Per Share Attributable to HomeAway, Inc.	9 Months Ended
Net Income Per Share Attributable to HomeAway, Inc.	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Net Income Per Share Attributable to HomeAway, Inc.	'
	12. Net Income Per Share Attributable to HomeAway, Inc.
	The following table sets forth the computation of basic and diluted net income per share of common stock (in thousands, except per share amounts):


		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Numerator
	Net income attributable to HomeAway, Inc.	$	4,912	$	8,478	$	13,222	$	19,243

	Denominator
	Weighted average common shares outstanding-basic		94,106		85,452		93,507		84,805
	Dilutive effect of stock options, warrants and restricted stock units		2,283		2,763		2,851		2,933

	Weighted average common shares outstanding-diluted		96,389		88,215		96,358		87,738

	Net income per share:
	Basic	$	0.05	$	0.1	$	0.14	$	0.23
	Diluted	$	0.05	$	0.1	$	0.14	$	0.22


	The following common equivalent shares were excluded from the calculation of net income per share as their inclusion would have been anti-dilutive (in thousands):


		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Stock options		2,604		3,250		2,038		3,098
	Restricted stock units		62		—		49		32
	Warrants		7,716		—		7,716		—

	Total common equivalent shares excluded		10,383		3,250		9,803		3,130

Subsequent_Events

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'

	13. Subsequent Events

	In October 2014, the Company invested $15,000,000 for a non-controlling equity interest in a privately-held company in the United States that operates a travel research application and website. The Company’s investment will be reported using the cost method of accounting and marked down to fair value if events or circumstances indicate an other-than-temporary decline in value has occurred and will be recorded in other non-current assets on the consolidated balance sheets.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2014
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying condensed consolidated financial statements include the accounts of HomeAway, Inc. and all of its wholly and majority owned subsidiaries and have been prepared in accordance with accounting principles generally accepted in the United States, or GAAP, for interim financial reporting and applicable quarterly reporting regulations of the Securities and Exchange Commission, or the SEC. All significant intercompany transactions and balances have been eliminated in consolidation. In the opinion of the Company’s management, the accompanying interim unaudited condensed consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and include all adjustments, consisting of normal recurring adjustments and those items discussed in these Notes, necessary for a fair presentation of the Company’s financial position, as of September 30, 2014, the results of operations for the three and nine months ended September 30, 2014 and September 30, 2013, the comprehensive income for the three and nine months ended September 30, 2014 and September 30, 2013, the cash flows for the nine months ended September 30, 2014 and September 30, 2013, and the changes in stockholders’ equity for the nine months ended September 30, 2014. Certain information and disclosures normally included in the notes to the annual financial statements prepared in accordance with GAAP have been omitted from these interim condensed consolidated financial statements pursuant to the rules and regulations of the SEC. Accordingly, these unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013. Operating results for this interim period are not necessarily indicative of the results that may be expected for the year ending December 31, 2014 or for any other period.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates. These differences could have a material effect on the Company’s future results of operations and financial position. Significant items subject to estimates and assumptions include certain unbilled revenues, the allowance for doubtful accounts, the fair value of short-term investments, the carrying amounts of goodwill and other indefinite-lived intangible assets, depreciation and amortization, the valuation of stock options, deferred income taxes and the fair value of noncontrolling interests.
Fair Value of Financial Instruments	'

	Fair Value of Financial Instruments

	Fair value is defined as the price that would be received from the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. To increase the comparability of fair value measures, the following hierarchy prioritizes the inputs to valuation methodologies used to measure fair value:



	Level 1:		Valuations based on quoted prices for identical assets and liabilities in active markets.

	Level 2:		Valuations based on observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data.

	Level 3:		Valuations based on unobservable inputs reflecting the Company’s own assumptions, consistent with reasonably available assumptions made by other market participants. These valuations require significant judgment.

	The following section describes the valuation methodologies used to measure certain financial assets and financial liabilities at fair value.

	Cash Equivalents, Restricted Cash and Short-Term Investments

	The Company’s cash equivalents, restricted cash and short-term investments classified as Level 1 are valued using quoted prices generated by market transactions involving identical assets. Short-term investments classified as Level 2 are valued using non-binding market consensus prices that are corroborated with observable market data; quoted market prices for similar instruments in active markets; or pricing models, such as a discounted cash flow model, with all significant inputs derived from or corroborated with observable market data. The Company did not hold any cash equivalents, restricted cash or short-term investments categorized as Level 3 as of September 30, 2014 or December 31, 2013.

	Short-term investments include time deposits, corporate bonds, municipal bonds and commercial paper and are classified as available-for-sale and reported at fair value using the specific identification method. Unrealized gains and losses are excluded from earnings and reported as a component of other comprehensive income (loss), net of related estimated tax provisions or benefits. Additionally, the Company periodically assesses whether an other than temporary impairment loss on investments has occurred due to declines in fair value or other market conditions. Declines in fair value that are considered other than temporary are recorded as an impairment in the consolidated statement of operations. The Company did not record any impairments of its investments for any of the periods presented.

	The carrying amounts of certain of the Company’s financial instruments, including cash and cash equivalents, accounts receivable, prepaid expenses and other current assets, accounts payable, accrued liabilities and deferred revenue approximate fair value because of the relatively short maturity of these instruments.

	The following table summarizes the basis used to measure certain financial assets at fair value on a recurring basis in the Company’s consolidated balance sheets at September 30, 2014 (in thousands):



			Balance as of				Quoted Prices in				Significant Other				Significant
			September 30,				Active Markets				Observable				Unobservable
			2014				for Identical				Inputs (Level 2)				Inputs
							Assets (Level 1)								(Level 3)
	Assets
	Cash equivalents
	Money market funds		$	179,094			$	179,094			$	—			$	—

	Total cash equivalents			179,094				179,094				—				—
	Restricted cash
	Time deposits			1,149				1,149				—				—

	Total restricted cash			1,149				1,149				—				—
	Short-term investments
	Time deposits			31,659				—				31,659				—
	Corporate bonds			354,753				—				354,753				—
	Municipal bonds			103,686				—				103,686				—
	Commercial paper			17,992				—				17,992				—

	Total short-term investments			508,090				—				508,090				—

	Total financial assets		$	688,333			$	180,243			$	508,090			$	—




	The following table summarizes the basis used to measure certain financial assets at fair value on a recurring basis in the Company’s consolidated balance sheets at December 31, 2013 (in thousands):



			Balance as of				Quoted Prices in				Significant Other				Significant
			December 31,				Active Markets				Observable				Unobservable
			2013				for Identical				Inputs (Level 2)				Inputs
							Assets (Level 1)								(Level 3)
	Assets
	Cash equivalents
Money market funds		$	26,451			$	26,451			$	—			$	—

Total cash equivalents			26,451				26,451				—				—
Restricted cash
Money market funds			758				758				—				—

Total restricted cash			758				758				—				—
Short-term investments
Time deposits			2,054				—				2,054				—
Corporate bonds			33,257				—				33,257				—
Municipal bonds			31,487				—				31,487				—

Total short-term investments			66,798				—				66,798				—

Total financial assets		$	94,007			$	27,209			$	66,798			$	—

Business Segment	'
	Business Segment
	The Company has one operating segment consisting of various products and services related to its online marketplace of accommodation rental listings. The Company’s chief operating decision maker is considered to be the Chief Executive Officer. The chief operating decision maker allocates resources and assesses performance of the business and other activities at the single operating segment level.
Cash and Cash Equivalents	'

	Cash and Cash Equivalents

	Cash and cash equivalents include investments in money market funds, corporate and municipal bonds and time deposits that are readily convertible into cash. Cash and cash equivalents are stated at cost, which approximates fair value. The Company considers all highly liquid investments purchased with an original maturity date of three months or less to be cash equivalents. Cash and cash equivalents consisted of the following at September 30, 2014 and December 31, 2013 (in thousands):



			September 30,				December 31,
			2014				2013
	Demand deposit accounts		$	113,009			$	298,157
	Money market funds			179,094				26,451

	Total		$	292,103			$	324,608

Restricted Cash	'

	Restricted Cash

	Restricted cash of $1,913,000 and $2,180,000 at September 30, 2014 and December 31, 2013, respectively, was held in accounts owned by the Company in conjunction with property license requirements, leased office space and to secure credit card availability and reimbursable direct debits due from the Company.
Short-term Investments	'

	Short-term Investments

	Short-term investments generally consist of marketable securities that have original maturities greater than ninety days as of the date of purchase. Investments in which the Company has the ability and intent, if necessary, to liquidate in order to support its current operations, including those with contractual maturities greater than one year from the date of purchase, are classified as short-term. The Company’s investment securities are classified as available-for-sale and are presented at estimated fair value with any unrealized gains and losses included in other comprehensive income (loss).



	Cash flows from purchases, sales and maturities of available-for-sale securities are classified as cash flows from investing activities and reported gross, including any related premiums or discounts. Premiums related to purchases of available-for-sale securities were $11,239,000 and $7,546,000 during the nine months ended September 30, 2014 and 2013, respectively. Fair values are based on quoted market prices. Short-term investments consisted of the following at September 30, 2014 and December 31, 2013 (in thousands):



			September 30, 2014
			Gross				Gross				Gross				Estimated
			Cost				Unrealized				Unrealized				Fair
							Gains				Losses				Value
	Time deposits		$	31,660			$	—			$	(1	)		$	31,659
	Corporate bonds			355,405				15				(667	)			354,753
	Municipal bonds			103,693				62				(69	)			103,686
	Commercial paper			17,992				—				—				17,992

	Total short-term investments		$	508,750			$	77			$	(737	)		$	508,090




			December 31, 2013
			Gross				Gross				Gross				Estimated
			Cost				Unrealized				Unrealized				Fair
							Gains				Losses				Value
	Time deposits		$	2,055			$	—			$	(1	)		$	2,054
	Corporate bonds			33,274				33				(50	)			33,257
	Municipal bonds			31,486				16				(15	)			31,487

	Total short-term investments		$	66,815			$	49			$	(66	)		$	66,798


	For fixed income securities that have unrealized losses as of September 30, 2014, the Company does not intend to sell any of these investments and it is not more likely than not that it will be required to sell any of these investments before recovery of the entire amortized cost basis. The Company has evaluated these fixed income securities and determined that no credit losses exist. Accordingly, the Company has determined that the unrealized losses on fixed income securities as of September 30, 2014 are temporary in nature.

	The following table summarizes the contractual underlying maturities of the Company’s short-term investments at September 30, 2014 and December 31, 2013 (in thousands):



			September 30, 2014
			Less than 12				12 Months or				Total
			Months				Greater				Total
	Time deposits		$	29,407			$	2,252			$	31,659
	Corporate bonds			224,177				130,576				354,753
	Municipal bonds			35,549				68,137				103,686
	Commercial paper			17,992				—				17,992

	Total short-term investments		$	307,125			$	200,965			$	508,090


			December 31, 2013
			Less than 12				12 Months or				Total
			Months				Greater				Total
	Time deposits		$	500			$	1,554			$	2,054
	Corporate bonds			11,164				22,093				33,257
	Municipal bonds			3,031				28,456				31,487

	Total short-term investments		$	14,695			$	52,103			$	66,798




Non-marketable Cost Investment

During the nine months ended September 30, 2014, the Company invested an additional $9,385,000 for a noncontrolling equity interest in a privately-held company in China. As of September 30, 2014, the total carrying value of the Company’s investment in the privately-held company was $19,498,000. The Company’s investment in the privately-held company is reported using the cost method of accounting or marked down to fair value when an event or circumstance indicates an other-than-temporary decline in value has occurred. No event or circumstance indicating an other-than-temporary decline in value of the Company’s interest in the non-marketable cost investment was identified. This investment is recorded in other non-current assets on the consolidated balance sheets.
Accounts Receivable	'

	Accounts Receivable

	Accounts receivable are primarily generated from several sources. Amounts due from credit card merchants who process the Company’s credit card sales from property listings and remit the proceeds to the Company are the primary source of accounts receivable. Accounts receivable are also generated from Internet display advertising amounts due in the ordinary course of business as well as amounts due to the Company for property listings, other products purchased on account or amounts due from partners who provide products and services such as advertising the properties of our property owners and managers on their websites, insurance products and payment processing services. Accounts receivable from Internet display advertising revenue and products purchased on account are recorded at the invoiced amount and are non-interest bearing. Accounts receivable outstanding longer than the contractual payment terms are considered past due. The Company determines its allowance for doubtful accounts by estimating losses on receivables based on known troubled accounts and historical experiences of losses incurred.
Property and Equipment	'

	Property and Equipment

	Property and equipment are recorded at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the related assets. Computer equipment and purchased software are generally depreciated over three years. Furniture and fixtures are generally depreciated over five to ten years. Leasehold improvements are depreciated on a straight-line basis over the shorter of the contractual lease period or their estimated useful life. Upon disposal, property and equipment and the related accumulated depreciation are removed from the accounts and the resulting gain or loss is reflected in the statements of operations. Ordinary maintenance and repairs are charged to expense, while expenditures that extend the physical or economic life of the assets are capitalized.

	The Company capitalizes certain internally developed software and website development costs. These capitalized costs were approximately $36,182,000 and $30,523,000 at September 30, 2014 and December 31, 2013, respectively, and are included in property and equipment, net, in the consolidated balance sheets. Internally developed software costs are generally depreciated over five years.

	The Company recorded depreciation expense on internally developed software and website development costs as follows for the three and nine months ended September 30, 2014 and 2013 (in thousands):



			Three Months Ended								Nine Months Ended
			September 30,								September 30,
			2014				2013				2014				2013
	Depreciation expense on internally developed software and website development costs		$	1,343			$	1,008			$	3,947			$	2,760
Goodwill and Intangible Assets	'

	Goodwill and Intangible Assets

	Goodwill arises from business combinations and is measured as the excess of the purchase consideration over the sum of the acquisition-date fair values of tangible and identifiable intangible assets acquired, less any liabilities assumed. While the Company uses the best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date, the Company’s estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, adjustments to the assets acquired and liabilities assumed are recorded with the corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the consolidated statements of operations.

	Goodwill and intangible assets deemed to have indefinite useful lives, such as certain trade names, are not amortized. Tests for impairment of goodwill and indefinite-lived intangible assets are performed on an annual basis or when events or circumstances indicate that the carrying amount may not be recoverable.



	Circumstances that could trigger an impairment test outside of the annual test include but are not limited to: a significant adverse change in the business climate or legal factors; adverse cash flow trends; an adverse action or assessment by a regulator; unanticipated competition; loss of key personnel; decline in stock price; and the results of tests for recoverability of a significant asset group. The Company determined that no triggering event occurred during any of the periods presented.

	For goodwill and indefinite lived intangible assets, the Company completes what is referred to as the “Step 0” analysis, which involves evaluating qualitative factors, including macroeconomic conditions, industry and market considerations, cost factors, and overall financial performance related to its goodwill and its indefinite lived intangible assets. If the Company’s “Step 0” analysis indicates that it is more likely than not that the fair value of a reporting unit or of an indefinite lived intangible asset is less than its carrying amount, then the Company would perform a quantitative two-step impairment test. The quantitative analysis compares the fair value of the Company’s reporting unit or indefinite-lived intangible assets to its carrying amount, and an impairment loss is recognized equivalent to the excess of the carrying amount over fair value. If, after assessing the totality of events or circumstances, the Company determines that it is more likely than not that the fair value of a reporting unit or indefinite lived intangible asset exceeds its carrying amount, then the quantitative impairment tests are unnecessary.

	The Company performs an evaluation of goodwill and indefinite-lived intangible assets for impairment annually in the fourth quarter of its fiscal year.

	The determination of whether or not goodwill or indefinite-lived intangible assets have become impaired involves a significant level of judgment. Changes in the Company’s strategy and/or market conditions could significantly impact these judgments and require adjustments to recorded amounts of goodwill or intangible assets.

	No impairment of goodwill or indefinite-lived intangible assets was identified in any of the periods presented.

	Identifiable intangible assets consist of trade names, customer listings, technology, domain names and contractual non-competition agreements associated with acquired businesses. Intangible assets with finite lives are amortized over their estimated useful lives on a straight-line basis and reviewed for impairment whenever events or changes in circumstances indicate that an asset’s carrying value may not be recoverable (see Note 4). The straight-line method of amortization represents the Company’s best estimate of the distribution of the economic value of the identifiable intangible assets.
Impairment of Long-lived Assets	'
	Impairment of Long-lived Assets
	The Company evaluates long-lived assets held for use, such as property and equipment, for impairment whenever events or changes in circumstances indicate the carrying value of an asset may not be recoverable. An impairment loss is recognized when estimated future undiscounted cash flows expected to result from the use of the asset plus net proceeds expected from disposition of the asset, if any, are less than the carrying value of the asset. When an impairment loss is recognized, the carrying amount of the asset is reduced to its estimated fair value in the period in which the determination is made. No material impairments of long-lived assets have been recorded during any of the periods presented.
Leases	'
	Leases
	The Company leases facilities in several countries around the world and certain equipment under non-cancelable lease agreements. The terms of certain lease agreements provide for rental payments on a graduated basis. Rent expense is recognized on a straight-line basis over the lease period and accrued as rent expense incurred but not paid.
Revenue Recognition	'
	Revenue Recognition
	The Company recognizes revenue when persuasive evidence of an agreement exists, delivery has occurred, the sales price is fixed or determinable and collectability is reasonably assured.
	The Company generates a significant portion of its revenue from customers purchasing online advertising services related to the listing of their properties for rent, primarily on a subscription basis over a fixed-term. The Company also generates revenue based on the number of traveler inquiries and reservation bookings for property listings on the Company’s websites, local and national Internet display advertisers, license of property management software and ancillary products and services.
	Payments for term-based subscriptions received in advance of services being rendered are recorded as deferred revenue and recognized on a straight-line basis over the listing period.
	Revenue for inquiry-based contracts are determined on a fixed fee-per-inquiry as stated in the arrangement and recognized when the service has been performed.

	The Company earns commission revenue for reservations made online through its websites, which is calculated as a percentage of the value of the reservation. This revenue is earned as the services are performed or as the customers’ refund privileges lapse and is included in listing revenue in the consolidated statement of operations.
	Internet display advertising revenue is generated primarily from advertisements appearing on the Company’s websites. There are several types of Internet advertisements, and the way in which advertising revenue is earned varies among them. Depending upon the terms, revenue might be earned each time an impression is delivered, each time a user clicks on an ad, each time a graphic ad is displayed, or each time a user clicks-through on the ad and takes a specified action on the destination site.
	The Company sells gift cards with no expiration date to travelers and does not charge administrative fees on unused cards. There is a portion of the gift card obligation that, based on historical redemption patterns, will not be used by the Company’s customers and is not required to be remitted to relevant jurisdictions (“breakage”). At the point of sale, the Company recognizes breakage as deferred revenue and amortizes it over 48 months based on historical redemption patterns. The Company also records commission revenue for each gift card sale over the same 48-month redemption period.
	Through its professional software for bed and breakfasts and professional property managers, the Company makes selected, online bookable properties available to online travel agencies and channel partners. The Company receives a percentage of the transaction value or a fee from the property manager for making this inventory available, which is recognized when earned. This revenue is included in other revenue in the consolidated statement of operations.
	The Company generates revenue from the licensing of software products, the sale of maintenance agreements and the sale of hosted software solutions. For software license sales, one year of maintenance is typically included as part of the initial purchase price of the bundled offering with annual renewals of the maintenance component of the agreement following in subsequent years.
	The Company recognizes revenue from the sale of perpetual licenses upon delivery, which generally occurs upon electronic transfer of the license key that makes the product available to the purchaser.
	As software is usually sold with maintenance, the amount of revenue allocated to the software license is determined by estimating the fair value of the maintenance and subtracting it from the total invoice or contract amount. Vendor-specific objective evidence, or VSOE, of the fair value of maintenance services is determined by the standard published list pricing for maintenance renewals, as the Company generally charges list prices for maintenance renewals. In determining VSOE, the Company requires that a substantial majority of the selling price for maintenance services fall within a reasonably narrow pricing range. Maintenance and support revenue is recognized ratably over the term of the agreement beginning on the activation date. Amounts that have been invoiced are recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria have been met.
	Sales of hosted software solutions are generally for a one-year period. Revenue is recognized on a straight-line basis over the contract term. Certain implementation services related to the hosting services are essential to the customer’s use of the hosting services. For sales of these hosting services where the Company is responsible for implementation, the Company recognizes implementation revenue ratably over the estimated period of the hosting relationship, which the Company considers to be three years. Recognition starts once the product has been made available to the customer.
	Training and consulting revenue is recognized upon delivery of the training or consulting services to the end customer.
	The Company accounts for sales incentives to customers as a reduction of revenue at the time that the revenue is recognized from the related product sale. The Company also reports revenue net of any sales tax collected.
Stock-Based Compensation	'
	Stock-Based Compensation
	The cost of stock-based compensation is recognized in the financial statements based upon the estimated grant date fair value of the awards measured using the Black–Scholes valuation model. The fair value of restricted stock awards and units is determined based on the number of shares granted and the fair value of the Company’s common stock as of the grant date. Fair value is generally recognized as an expense on a straight-line basis, net of estimated forfeitures, over the employee requisite service period. When estimating forfeitures, the Company considers voluntary termination behaviors as well as trends of actual option forfeitures.
	The Company uses the “with and without” approach in determining the order in which tax attributes are utilized. As a result, the Company only recognizes a tax benefit from stock-based awards in additional paid-in capital if an incremental tax benefit is realized after all other tax attributes currently available to the Company have been utilized. When tax deductions from stock-based awards are less than the cumulative book compensation expense, the tax effect of the resulting difference is charged first to additional paid-in capital to the extent of the Company’s pool of windfall tax benefits with any remainder recognized in income tax expense. The Company has determined that it has a sufficient windfall pool available and therefore no amounts have been recognized in income tax expense. In addition, the Company accounts for the indirect effects of stock-based awards on other tax attributes through the consolidated statements of operations.
	The benefits of tax deductions in excess of recognized compensation costs are reported as financing cash inflows, but only when such excess tax benefits are realized by a reduction to current taxes payable.
	The following table summarizes the excess tax (expense) benefit that the Company recorded for the three and nine months ended September 30, 2014 and 2013 (in thousands):


			Three Months Ended								Nine Months Ended
			September 30,								September 30,
			2014				2013				2014				2013
	Excess tax (expense) benefit from stock-based compensation		$	1,362			$	1,992			$	2,583			$	6,237
	This tax benefit has been recorded as additional paid-in capital on the Company’s consolidated balance sheets.
Income Taxes	'
	Income Taxes
	The Company recognizes income taxes using an asset and liability approach. This approach requires the recognition of deferred tax liabilities and assets for the future tax consequences of events that have been recognized in the Company’s consolidated financial statements or tax returns. The measurement of deferred taxes is based on provisions of the enacted tax law and the effects of future changes in tax laws or rates are not anticipated. A valuation allowance is recognized if, based on the weight of available evidence, it is more likely than not that some portion or all of the deferred tax asset will not be realized. Evaluating the need for an amount of a valuation allowance for deferred tax assets requires significant judgment and analysis of the positive and negative evidence available, including past operating results, estimates of future taxable income, reversals of existing taxable temporary differences and the feasibility of tax planning in order to determine whether all or some portion of the deferred tax assets will not be realized. Based on the available evidence and judgment, the Company has determined that it is more likely than not that certain loss carryforwards will not be realized; therefore, the Company has established a valuation allowance for such deferred tax assets to reduce the loss carryforward assets to amounts expected to be utilized.
	The Company may be subject to income tax audits by the respective tax authorities in any or all of the jurisdictions in which the Company operates. The Company is currently undergoing an audit at its subsidiary in the United Kingdom. Significant judgment is required in determining uncertain tax positions. The Company recognizes the benefit of uncertain income tax positions only if these positions are more likely than not to be sustained. Also, the recognized income tax benefit is measured at the largest amount that is more than 50% likely of being realized. The Company adjusts these reserves in light of changing facts and circumstances, such as the closing of an audit or the refinement of an estimate. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company records interest and penalties related to unrecognized tax benefits as a component of income tax expense. The countries in which the Company may be subject to potential examination by tax authorities include Australia, Brazil, Colombia, France, Germany, Italy, the Netherlands, New Zealand, Singapore, Spain, Switzerland, Thailand, the United Kingdom and the United States.
	The calculation of the Company’s tax liabilities involves the inherent uncertainty associated with the application of complex tax laws. As a multinational corporation, the Company conducts its business in many countries and is subject to taxation in many jurisdictions. The taxation of the Company’s business is subject to the application of various and sometimes conflicting tax laws and regulations as well as multinational tax conventions. The Company’s effective tax rate is highly dependent upon the geographic distribution of its worldwide earnings or losses, the tax regulations and tax rates in each geographic region, the availability of tax credits and carryforwards, and the effectiveness of its tax planning strategies. The application of tax laws and regulations is subject to legal and factual interpretation, judgment and uncertainty. Tax laws themselves are subject to change as a result of changes in fiscal policy, changes in legislation, and the evolution of regulations and court rulings. Consequently, taxing authorities may impose tax assessments or judgments against the Company that could materially impact its tax liability and/or its effective income tax rate. The Company believes it has adequately provided in its financial statements for additional taxes that it estimates may be assessed by the various taxing authorities. While the Company believes that it has adequately provided for all uncertain tax positions, amounts asserted by tax authorities could be greater or less than the Company’s accrued position. These tax liabilities, including the interest and penalties, are adjusted pursuant to a settlement with tax authorities, completion of audit, refinement of estimates or expiration of various statutes of limitation.
Foreign Currency	'

	Foreign Currency

	The functional currency of the Company’s foreign subsidiaries is generally their respective local currency. The financial statements of the Company’s international operations are translated into U.S. dollars using the exchange rate at each balance sheet date for assets and liabilities, the historical exchange rate for stockholders’ equity, and a weighted average exchange rate for each period for revenue, expenses, and gains and losses. Foreign currency translation adjustments are recorded as a separate component of stockholders’ equity. Gains and losses from foreign currency denominated transactions are recorded in other income (expense) in the Company’s consolidated statements of operations.

	The following table summarizes the foreign exchange gain (loss) that the Company recorded for the three and nine months ended September 30, 2014 and 2013 (in thousands):



			Three Months Ended								Nine Months Ended
			September 30,								September 30,
			2014				2013				2014				2013
	Foreign exchange gain (loss)		$	(1,432	)		$	(482	)		$	(6,421	)		$	(1,950	)
Derivative Financial Instruments	'

	Derivative Financial Instruments

	As a result of the Company’s international operations, it is exposed to various market risks that may affect its consolidated results of operations, cash flows and financial position. These market risks include, but are not limited to, fluctuations in currency exchange rates. The Company’s primary foreign currency exposures are in Euros, British Pound Sterling and Australian Dollars. As a result, the Company faces exposure to adverse movements in currency exchange rates as the financial results of its operations are translated from local currency into U.S. dollars upon consolidation. Additionally, foreign exchange rate fluctuations on transactions denominated in currencies other than the functional currency result in gains and losses that are reflected in other income (expense) in the Company’s consolidated statements of operations.

	The Company may enter into derivative instruments to hedge certain net exposures of nonfunctional currency denominated assets and liabilities, primarily related to intercompany loans, even though it does not elect to apply hedge accounting or hedge accounting does not apply. Gains and losses resulting from a change in fair value for these derivatives are reflected in the period in which the change occurs and are recognized on the consolidated statement of operations in other income (expense). Cash flows from these contracts are classified within cash flows from investing activities on the consolidated statements of cash flows.

	The Company does not use financial instruments for trading or speculative purposes. The Company recognizes all derivative instruments on the balance sheet at fair value and its derivative instruments are generally short-term in duration. The Company is exposed to the risk that counterparties to derivative contracts may fail to meet their contractual obligations.

	The following table shows the fair value and notional amounts of the Company’s outstanding or unsettled derivative instruments that are not designated as hedging instruments covering foreign currency exposures during the quarter ended September 30, 2014 and closing October 2, 2014 (in thousands).



	Balance Sheet Caption		September 30, 2014
			Significant Other												U.S. Dollar
			Observable Inputs												Notional
			(Level 2)
			Gross Amount of				Gross Amounts				Net Amount
			Recognized				Offset in the				Presented in the
			Assets/Liabilities				Balance Sheet				Balance Sheet
	Prepaid expenses and other current assets		$	10,487			$	(260	)		$	10,227			$	160,038
	Accrued expenses			(447	)			260				(187	)			15,626

	Total		$	10,040			$	—			$	10,040			$	175,664


	In addition to the notional amounts listed above, the Company also had $158,000,000 of derivatives entered into on September 30, 2014 with a closing date of January 2, 2015.

	The following table shows the fair value and notional amounts of the Company’s outstanding or unsettled derivative instruments that are not designated as hedging instruments covering foreign currency exposures during the quarter ended December 31, 2013 and closing January 2, 2014 (in thousands).



	Balance Sheet Caption		December 31, 2013
			Significant Other												U.S. Dollar
			Observable Inputs												Notional
			(Level 2)
			Gross Amount of				Gross Amounts				Net Amount
			Recognized				Offset in the				Presented in the
			Assets/Liability				Balance Sheet				Balance Sheet
	Prepaid expenses and other current assets		$	363			$	—			$	363			$	20,520
	Accrued expenses			(979	)			—				(979	)			84,292

	Total		$	(616	)		$	—			$	(616	)		$	104,812

Net Income Per Share	'

	Net Income Per Share Attributable to HomeAway, Inc.

	Basic net income per share is computed by dividing net income attributable to HomeAway, Inc. by the weighted average number of common shares outstanding during the period. Diluted income per share is computed by dividing net income attributable to HomeAway, Inc. by the weighted average common shares outstanding plus potentially dilutive common shares. The dilutive effect of outstanding options, warrants and awards is reflected in diluted earnings per share by application of the treasury stock method.

	Restricted stock awards provide the holder of unvested shares the right to participate in dividends declared on the Company’s common stock. Accordingly, these shares are included in the weighted average shares outstanding for the computation of basic earnings per share in periods of undistributed earnings. Restricted stock awards are excluded from the basic earnings per share in periods of undistributed losses as the holders are not contractually obligated to participate in the losses of the Company. Unvested restricted stock units do not provide the holder the right to participate in dividends declared on the Company’s common stock. Accordingly, these shares are excluded in the weighted average shares outstanding for the computation of basic earnings per share in periods of undistributed earnings or losses.
Comprehensive Income (Loss)	'

	Comprehensive Income (Loss) Attributable to HomeAway, Inc.

	Comprehensive income (loss) attributable to HomeAway, Inc. consists of net income (loss), cumulative foreign currency translation adjustments, unrealized gain (loss) on available-for-sale securities and comprehensive income (loss) attributable to noncontrolling interests.
Reclassifications	'

	Reclassifications

	Certain reclassifications have been made to prior periods’ consolidated statements of operations to conform to the current period presentation. These reclassifications did not result in any change in previously reported total revenue, net income, total assets or shareholders’ equity.
Recent Accounting Pronouncements	'

	Recent Accounting Pronouncements

	In April 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) No. 2014-08, which is amended guidance for reporting discontinued operations and disposals of components of an entity. The amended guidance requires that a disposal representing a strategic shift that has or will have a major effect on an entity’s financial results, or a business activity classified as held for sale, should be reported as discontinued operations. This new guidance also expands the disclosure requirements for discontinued operations and adds new disclosures for individually significant dispositions that do not qualify as discontinued operations. The amended guidance is effective prospectively for fiscal years, and interim reporting periods within those years, beginning after December 15, 2014. Early adoption is permitted only for disposals that have not been previously reported. This guidance is not expected to have a material impact on the Company’s consolidated financial position or results of operations.

	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, requiring an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The updated standard will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective and permits the use of either the retrospective or cumulative effect transition method. Early adoption is not permitted. The updated standard is effective for fiscal years, and interim reporting periods within those years, beginning after December 15, 2016. The Company has not yet selected a transition method and is currently evaluating the effect that the updated standard will have on its consolidated financial statements and related disclosures.



	In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements – Going Concern, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern, related to the disclosures around going concern. The new standard provides guidance around management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. Early adoption is permitted. The adoption of this standard is not expected to have a material impact on the Company’s financial statements.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	9 Months Ended
Summary of Significant Accounting Policies (Tables)	Sep. 30, 2014
Accounting Policies [Abstract]	'
Fair Value of Financial Assets and Liabilities Measured on Recurring Basis	'

	The following table summarizes the basis used to measure certain financial assets at fair value on a recurring basis in the Company’s consolidated balance sheets at September 30, 2014 (in thousands):



		Balance as of			Quoted Prices in			Significant Other			Significant
		September 30,			Active Markets			Observable			Unobservable
		2014			for Identical			Inputs (Level 2)			Inputs
					Assets (Level 1)						(Level 3)
	Assets
	Cash equivalents
	Money market funds	$	179,094		$	179,094		$	—		$	—

	Total cash equivalents		179,094			179,094			—			—
	Restricted cash
	Time deposits		1,149			1,149			—			—

	Total restricted cash		1,149			1,149			—			—
	Short-term investments
	Time deposits		31,659			—			31,659			—
	Corporate bonds		354,753			—			354,753			—
	Municipal bonds		103,686			—			103,686			—
	Commercial paper		17,992			—			17,992			—

	Total short-term investments		508,090			—			508,090			—

	Total financial assets	$	688,333		$	180,243		$	508,090		$	—




	The following table summarizes the basis used to measure certain financial assets at fair value on a recurring basis in the Company’s consolidated balance sheets at December 31, 2013 (in thousands):



		Balance as of			Quoted Prices in			Significant Other			Significant
		December 31,			Active Markets			Observable			Unobservable
		2013			for Identical			Inputs (Level 2)			Inputs
					Assets (Level 1)						(Level 3)
	Assets
	Cash equivalents
	Money market funds	$	26,451		$	26,451		$	—		$	—

	Total cash equivalents		26,451			26,451			—			—
	Restricted cash
	Money market funds		758			758			—			—

	Total restricted cash		758			758			—			—
	Short-term investments
	Time deposits		2,054			—			2,054			—
	Corporate bonds		33,257			—			33,257			—
	Municipal bonds		31,487			—			31,487			—

	Total short-term investments		66,798			—			66,798			—

	Total financial assets	$	94,007		$	27,209		$	66,798		$	—

Schedule of Cash and Cash Equivalents	'
	Cash and cash equivalents consisted of the following at September 30, 2014 and December 31, 2013 (in thousands):


		September 30,			December 31,
		2014			2013
	Demand deposit accounts	$	113,009		$	298,157
	Money market funds		179,094			26,451

	Total	$	292,103		$	324,608

Short-Term Investments	'

	Short-term investments consisted of the following at September 30, 2014 and December 31, 2013 (in thousands):



		September 30, 2014
		Gross			Gross			Gross			Estimated
		Cost			Unrealized			Unrealized			Fair
					Gains			Losses			Value
	Time deposits	$	31,660		$	—		$	(1	)	$	31,659
	Corporate bonds		355,405			15			(667	)		354,753
	Municipal bonds		103,693			62			(69	)		103,686
	Commercial paper		17,992			—			—			17,992

	Total short-term investments	$	508,750		$	77		$	(737	)	$	508,090




		December 31, 2013
		Gross			Gross			Gross			Estimated
		Cost			Unrealized			Unrealized			Fair
					Gains			Losses			Value
	Time deposits	$	2,055		$	—		$	(1	)	$	2,054
	Corporate bonds		33,274			33			(50	)		33,257
	Municipal bonds		31,486			16			(15	)		31,487

	Total short-term investments	$	66,815		$	49		$	(66	)	$	66,798

Summary of Contractual Underlying Maturities of Short-Term Investments	'

	The following table summarizes the contractual underlying maturities of the Company’s short-term investments at September 30, 2014 and December 31, 2013 (in thousands):



		September 30, 2014
		Less than 12			12 Months or			Total
		Months			Greater			Total
	Time deposits	$	29,407		$	2,252		$	31,659
	Corporate bonds		224,177			130,576			354,753
	Municipal bonds		35,549			68,137			103,686
	Commercial paper		17,992			—			17,992

	Total short-term investments	$	307,125		$	200,965		$	508,090


		December 31, 2013
		Less than 12			12 Months or			Total
		Months			Greater			Total
	Time deposits	$	500		$	1,554		$	2,054
	Corporate bonds		11,164			22,093			33,257
	Municipal bonds		3,031			28,456			31,487

	Total short-term investments	$	14,695		$	52,103		$	66,798

Summary of Depreciation Expenses on Internally Developed Software and Website Development Costs	'

	The Company recorded depreciation expense on internally developed software and website development costs as follows for the three and nine months ended September 30, 2014 and 2013 (in thousands):



		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
	Depreciation expense on internally developed software and website development costs	$	1,343		$	1,008		$	3,947		$	2,760
Summary of Excess Tax (Expense) Benefit	'
	The following table summarizes the excess tax (expense) benefit that the Company recorded for the three and nine months ended September 30, 2014 and 2013 (in thousands):


		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
	Excess tax (expense) benefit from stock-based compensation	$	1,362		$	1,992		$	2,583		$	6,237
Summary of Foreign Exchange Gain (Loss)	'

	The following table summarizes the foreign exchange gain (loss) that the Company recorded for the three and nine months ended September 30, 2014 and 2013 (in thousands):



		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
	Foreign exchange gain (loss)	$	(1,432	)	$	(482	)	$	(6,421	)	$	(1,950	)
Schedule of Fair Value and Notional Amounts of Outstanding or Unsettled Derivative Instruments	'

	The following table shows the fair value and notional amounts of the Company’s outstanding or unsettled derivative instruments that are not designated as hedging instruments covering foreign currency exposures during the quarter ended September 30, 2014 and closing October 2, 2014 (in thousands).



	Balance Sheet Caption	September 30, 2014
		Significant Other									U.S. Dollar
		Observable Inputs									Notional
		(Level 2)
		Gross Amount of			Gross Amounts			Net Amount
		Recognized			Offset in the			Presented in the
		Assets/Liabilities			Balance Sheet			Balance Sheet
	Prepaid expenses and other current assets	$	10,487		$	(260	)	$	10,227		$	160,038
	Accrued expenses		(447	)		260			(187	)		15,626

	Total	$	10,040		$	—		$	10,040		$	175,664


	The following table shows the fair value and notional amounts of the Company’s outstanding or unsettled derivative instruments that are not designated as hedging instruments covering foreign currency exposures during the quarter ended December 31, 2013 and closing January 2, 2014 (in thousands).



	Balance Sheet Caption	December 31, 2013
		Significant Other									U.S. Dollar
		Observable Inputs									Notional
		(Level 2)
		Gross Amount of			Gross Amounts			Net Amount
		Recognized			Offset in the			Presented in the
		Assets/Liability			Balance Sheet			Balance Sheet
	Prepaid expenses and other current assets	$	363		$	—		$	363		$	20,520
	Accrued expenses		(979	)		—			(979	)		84,292

	Total	$	(616	)	$	—		$	(616	)	$	104,812

Business_Combinations_Tables

Business Combinations (Tables)	9 Months Ended
Business Combinations (Tables)	Sep. 30, 2014
Business Combinations [Abstract]	'
Fair Value of Acquisition Amounts at Acquisition Date	'
	The following table summarizes the Company’s acquisition during the nine months ended September 30, 2014, with amounts shown below as fair values at the acquisition date (in thousands):


		Glad to Have You, Inc.
	Net tangible assets (liabilities) acquired
	Cash	$	25
	Deferred revenue		(65	)
	Other		17

	Total net tangible assets (liabilities) acquired		(23	)
	Deferred tax liabilities		(1,653	)
	Trade name		1,177
	Developed technology		3,760
	Customer relationships		1,643
	Goodwill		11,647
	Non-competition agreements		240

	Purchase price		16,791
	Less: Cash acquired		(25	)

	Net purchase price	$	16,766

Pro Forma Results	'
	The unaudited pro forma supplemental information prepared by the Company is not necessarily indicative of the results expected in future periods or the results that actually would have been realized had the acquired business and the Company been a combined company during the specified periods.


		Three Months Ended			Nine Months Ended		Year Ended
		September 30, 2013			September 30, 2013		December 31, 2013
	Pro forma total revenue	$	95,796		$	275,241	$	370,620
	Pro forma net income		9,693			23,637		28,687

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
Goodwill and Other Intangible Assets (Tables)	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Changes in Goodwill Balance	'
	Changes in the Company’s goodwill balance for the year ended December 31, 2013 and the nine months ended September 30, 2014 are summarized in the table below (in thousands):


	Balance at December 31, 2012	$	312,412
	Acquired in business combinations		198,124
	Foreign currency translation adjustment		(2,925	)

	Balance at December 31, 2013		507,611
	Acquired in business combinations		11,647
	Foreign currency translation adjustment		(9,666	)
	Post-acquisition goodwill adjustment for the Stayz acquisition		511

	Balance at September 30, 2014	$	510,103

Amortized Finite-Lived Intangible Assets	'
	The finite-lived intangible assets that are being amortized are summarized in the table below (in thousands):


					September 30, 2014							December 31, 2013
		Useful Life			Gross		Accumulated			Net		Gross		Accumulated			Net
		(Years)			Carrying		Amortization			Carrying		Carrying		Amortization			Carrying
					Amount					Amount		Amount					Amount
	Trade names and trademarks		10		$	30,915	$	(7,292	)	$	23,623	$	30,066	$	(5,050	)	$	25,016
	Developed technology		8-Feb			34,609		(25,582	)		9,027		31,513		(23,646	)		7,867
	Customer relationships		14-Jun			80,156		(45,250	)		34,906		80,510		(41,739	)		38,771
	Noncompete agreements and domain names		5-Feb			5,370		(3,821	)		1,549		5,163		(3,181	)		1,982

	Total				$	151,050	$	(81,945	)	$	69,105	$	147,252	$	(73,616	)	$	73,636
Summary of Amortization Expenses	'
	The following table summarizes the amortization expense that the Company recorded for the three and nine months ended September 30, 2014 and 2013 (in thousands):


		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2014			2013		2014			2013
	Amortization expense	$	3,397		$	2,730	$	10,163		$	8,905
Indefinite-Lived Intangible Assets	'
	The Company has the following indefinite-lived intangible assets recorded in its consolidated balance sheet as of September 30, 2014 and December 31, 2013, respectively (in thousands):


		September 30,			December 31,
		2014			2013
	Trademarks, trade names and other	$	7,029		$	7,029

Accrued_Expenses_Tables

Accrued Expenses (Tables)	9 Months Ended
Accrued Expenses (Tables)	Sep. 30, 2014
Payables and Accruals [Abstract]	'
Accrued Expenses	'
	The Company’s accrued expenses are comprised of the following at September 30, 2014, and December 31, 2013 (in thousands):


		September 30,		December 31,
		2014		2013
	Compensation and related benefits	$	20,395	$	21,700
	Gift cards		4,147		6,090
	Contracting, consulting and professional fees		2,642		4,494
	Taxes		5,658		3,425
	Marketing		4,742		3,197
	Foreign exchange – forward contracts		187		979
	Traveler guarantee liability		2,194		956
	Other		7,091		13,784

	Total	$	47,056	$	54,625

Convertible_Senior_Notes_Table

Convertible Senior Notes (Tables)	9 Months Ended
Convertible Senior Notes (Tables)	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Summary of Convertible Senior Notes	'



	(In thousands)		Par Value			Equity			Carrying Value of Convertible
						Component			Senior Notes as of
						Recorded
						at Issuance			September 30,			December 31,
									2014			2013
	0.125% Convertible Senior Notes due April 1, 2019		$	402,500		$	90,887	(1)	$	311,738		$	—


	-1	This amount represents the equity component recorded at the initial issuance of the 0.125% convertible senior notes.
Schedule of Conversion of Senior Notes to Common Stock	'

			Conversion			Initial			Free
			Rate per $1,000			Conversion			Convertibility Date
			Par Value			Price per
						Share
	0.125% Senior Notes			19.1703		$	52.16			October 1, 2018
Schedule of Convertible Senior Notes	'
	The Notes consist of the following (in thousands):


			September 30,			December 31,
			2014			2013
	Liability component:
	Principal:
	0.125% Senior Notes		$	402,500		$	—
	Less: debt discount, net
	0.125% Senior Notes			(90,762	)		—

	Net carrying amount		$	311,738		$	—

Summary of Hedge Notes	'

			Date			Purchase			Shares
						(in thousands)			underlying Note
									Hedges
	Note Hedges			March 2014		$	85,853			7,716,049
Components of Warrants	'

			Date			Proceeds			Shares			Strike
			Date			(in thousands)			Shares			Price
	Warrants			March 2014		$	38,278			7,716,049		$	81.14
Interest Expense Recognized Related To Notes	'
	The following table sets forth total interest expense recognized related to the Notes (in thousands):


			Three Months Ended						Nine Months Ended
			September 30,						September 30,
			2014			2013			2014			2013
	0.125% coupon		$	126		$	—		$	252		$	—
	Amortization of debt issuance costs			13			—			26			—
	Amortization of debt discount			4,378			—			8,694			—
	Capitalized interest			(144	)		—			(144	)		—

	Total		$	4,373		$	—		$	8,828		$	—

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	9 Months Ended
Commitments and Contingencies (Tables)	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Summary of Rental Expense	'
	The following table summarizes the total rental expense that the Company recorded for the three and nine months ended September 30, 2014 and 2013 (in thousands):


		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2014			2013		2014		2013
	Rental expense	$	1,911		$	1,341	$	5,134	$	3,835
Changes for Traveler Guarantees	'
	Expected future claims for traveler guarantees, which are presented as a current liability in the Company’s consolidated balance sheets, and changes for the guarantees are as follows (in thousands):


	Traveler guarantee liability at December 31, 2012	$	566
	Costs accrued for new vacation rentals		2,230
	Guarantee obligations honored		(1,840	)

	Traveler guarantee liability at December 31, 2013	$	956
	Costs accrued for new vacation rentals		3,136
	Guarantee obligations honored		(1,898	)

	Traveler guarantee liability at September 30, 2014	$	2,194

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
Stock-Based Compensation (Tables)	Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Total Stock-Based Compensation Expense	'
	The following table summarizes the total stock-based compensation expense that the Company recorded for the three and nine months ended September 30, 2014 and 2013 (in thousands):


		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Cost of revenue	$	847	$	720	$	2,415	$	2,392
	Product development		3,485		2,515		9,589		6,743
	Sales and marketing		2,763		2,349		7,868		6,235
	General and administrative		5,576		4,413		15,710		12,219

	Total	$	12,671	$	9,997	$	35,582	$	27,589

Redeemable_Noncontrolling_Inte1

Redeemable Noncontrolling Interests (Tables)	9 Months Ended
Redeemable Noncontrolling Interests (Tables)	Sep. 30, 2014
Noncontrolling Interest [Abstract]	'
Schedule of Changes of Redeemable Noncontrolling Interests	'
	Changes in the Company’s redeemable noncontrolling interests for the year ended December 31, 2013 and the nine months ended September 30, 2014 are summarized in the table below (in thousands):


	Balance at December 31, 2012	$	—
	Fair value at acquisition		10,966
	Net loss attributable to noncontrolling interests		(395	)
	Currency translation adjustments		13

	Balance at December 31, 2013	$	10,584
	Net loss attributable to noncontrolling interests		(1,233	)
	Changes to redemption value of noncontrolling interests		851
	Currency translation adjustments		29

	Balance at September 30, 2014	$	10,231

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
Accumulated Other Comprehensive Income (Loss) (Tables)	Sep. 30, 2014
Equity [Abstract]	'
Accumulated Other Comprehensive Loss	'
	Accumulated other comprehensive income (loss) consists of the following at September 30, 2014 and December 31, 2013, respectively (in thousands):


		September 30,			December 31,
		2014			2013
	Foreign currency translation	$	(13,191	)	$	(6,728	)
	Unrealized losses on short-term investments		(661	)		(19	)

	Total	$	(13,852	)	$	(6,747	)

Income_Taxes_Tables

Income Taxes (Tables)	9 Months Ended
Income Taxes (Tables)	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Summary of Income Tax Expenses	'
	The following table summarizes the total income tax expense that the Company recorded, and the related effective tax rate, for the three and nine months ended September 30, 2014 and 2013 (in thousands):


		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2014			2013			2014			2013
	Income tax expense	$	845		$	4,312		$	5,909		$	9,143
	Effective tax rate		13.9	%		34	%		31.5	%		32.4	%

Net_Income_Per_Share_Attributa1

Net Income Per Share Attributable to HomeAway, Inc. (Tables)	9 Months Ended
	Sep. 30, 2014
Earnings Per Share [Abstract]	'
Computation of Basic and Diluted Net Income Per Share of Common Stock	'
	The following table sets forth the computation of basic and diluted net income per share of common stock (in thousands, except per share amounts):


		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Numerator
	Net income attributable to HomeAway, Inc.	$	4,912	$	8,478	$	13,222	$	19,243

	Denominator
	Weighted average common shares outstanding-basic		94,106		85,452		93,507		84,805
	Dilutive effect of stock options, warrants and restricted stock units		2,283		2,763		2,851		2,933

	Weighted average common shares outstanding-diluted		96,389		88,215		96,358		87,738

	Net income per share:
	Basic	$	0.05	$	0.1	$	0.14	$	0.23
	Diluted	$	0.05	$	0.1	$	0.14	$	0.22

Common Equivalent Shares Excluded from Calculation of Net Income Per Share as their Inclusion Would have been Anti-Dilutive	'
	The following common equivalent shares were excluded from the calculation of net income per share as their inclusion would have been anti-dilutive (in thousands):


		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2014		2013		2014		2013
	Stock options		2,604		3,250		2,038		3,098
	Restricted stock units		62		—		49		32
	Warrants		7,716		—		7,716		—

	Total common equivalent shares excluded		10,382		3,250		9,803		3,130

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	$508,090	$66,798
Time Deposits [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	31,659	2,054
Commercial paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	17,992	'
Corporate bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	354,753	33,257
Municipal bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	103,686	31,487
Fair Value, Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash equivalents	179,094	26,451
Restricted cash	1,149	758
Short-term investments	508,090	66,798
Total financial assets	688,333	94,007
Fair Value, Measurements, Recurring [Member] \| Money market funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash equivalents	179,094	26,451
Restricted cash	'	758
Fair Value, Measurements, Recurring [Member] \| Time Deposits [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Restricted cash	1,149	'
Short-term investments	31,659	2,054
Fair Value, Measurements, Recurring [Member] \| Commercial paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	17,992	'
Fair Value, Measurements, Recurring [Member] \| Corporate bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	354,753	33,257
Fair Value, Measurements, Recurring [Member] \| Municipal bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	103,686	31,487
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value, Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash equivalents	179,094	26,451
Restricted cash	1,149	758
Total financial assets	180,243	27,209
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value, Measurements, Recurring [Member] \| Money market funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash equivalents	179,094	26,451
Restricted cash	'	758
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Fair Value, Measurements, Recurring [Member] \| Time Deposits [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Restricted cash	1,149	'
(Level 2) [Member] \| Fair Value, Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	508,090	66,798
Total financial assets	508,090	66,798
(Level 2) [Member] \| Fair Value, Measurements, Recurring [Member] \| Time Deposits [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	31,659	2,054
(Level 2) [Member] \| Fair Value, Measurements, Recurring [Member] \| Commercial paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	17,992	'
(Level 2) [Member] \| Fair Value, Measurements, Recurring [Member] \| Corporate bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	354,753	33,257
(Level 2) [Member] \| Fair Value, Measurements, Recurring [Member] \| Municipal bonds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Short-term investments	$103,686	$31,487

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
	Segment	Dec. 31, 2013	Sep. 30, 2013
Significant Accounting Policies [Line Items]	'	'	'
Number of operating segment	1	'	'
Available for sales securities, premium	$11,239,000	'	$7,546,000
Carrying value of non-marketable cost investment	9,385,000	'	'
Total carrying value of company investments	19,498,000	'	'
Capitalized certain internally developed software	36,182,000	30,523,000	'
Recognized income tax positions, percentage	50.00%	'	'
Derivatives amount	158,000,000	'	'
Amount of unsettled derivative instruments	0	0	'
Breakage Revenue [Member]	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Revenue recognition period	'48 months	'	'
Commission Revenue [Member]	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Revenue recognition period	'48 months	'	'
Money market funds [Member]	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Restricted cash	$1,913,000	$2,180,000	'
Equipment, computer hardware and purchased computer software [Member]	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Property, plant and equipment useful life	'3 years	'	'
Furniture and fixtures [Member] \| Minimum [Member]	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Property, plant and equipment useful life	'5 years	'	'
Furniture and fixtures [Member] \| Maximum [Member]	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Property, plant and equipment useful life	'10 years	'	'
Leasehold Improvements [Member]	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Property, plant and equipment useful life description	'Shorter of the contractual lease period or their useful life.	'	'
Internally Developed Software and Website Development Costs [Member]	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Property, plant and equipment useful life	'5 years	'	'

Summary_of_Significant_Account5

Summary of Significant Accounting Policies - Schedule of Cash and Cash Equivalents (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Cash and Cash Equivalents [Line Items]	'	'	'	'
Demand deposit accounts	$292,103	$324,608	$192,395	$189,478
Demand Deposits [Member]	'	'	'	'
Cash and Cash Equivalents [Line Items]	'	'	'	'
Demand deposit accounts	113,009	298,157	'	'
Money market funds [Member]	'	'	'	'
Cash and Cash Equivalents [Line Items]	'	'	'	'
Demand deposit accounts	$179,094	$26,451	'	'

Summary_of_Significant_Account6

Summary of Significant Accounting Policies - Short-Term Investments (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Cost	$508,750	$66,815
Gross Unrealized Gains	77	49
Gross Unrealized Losses	-737	-66
Estimated Fair Value	508,090	66,798
Time Deposits [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Cost	31,660	2,055
Gross Unrealized Gains	'	'
Gross Unrealized Losses	-1	-1
Estimated Fair Value	31,659	2,054
Commercial paper [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Cost	17,992	'
Gross Unrealized Gains	'	'
Gross Unrealized Losses	'	'
Estimated Fair Value	17,992	'
Corporate bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Cost	355,405	33,274
Gross Unrealized Gains	15	33
Gross Unrealized Losses	-667	-50
Estimated Fair Value	354,753	33,257
Municipal bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Gross Cost	103,693	31,486
Gross Unrealized Gains	62	16
Gross Unrealized Losses	-69	-15
Estimated Fair Value	$103,686	$31,487

Summary_of_Significant_Account7

Summary of Significant Accounting Policies - Summary of Contractual Underlying Maturities of Short-Term Investments (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'
Short-term Investments, Less than 12 Months	$307,125	$14,695
Short-term Investments, 12 Months or Greater	200,965	52,103
Short-term Investments, fair value	508,090	66,798
Time Deposits [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Short-term Investments, Less than 12 Months	29,407	500
Short-term Investments, 12 Months or Greater	2,252	1,554
Short-term Investments, fair value	31,659	2,054
Commercial paper [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Short-term Investments, Less than 12 Months	17,992	'
Short-term Investments, 12 Months or Greater	'	'
Short-term Investments, fair value	17,992	'
Corporate bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Short-term Investments, Less than 12 Months	224,177	11,164
Short-term Investments, 12 Months or Greater	130,576	22,093
Short-term Investments, fair value	354,753	33,257
Municipal bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Short-term Investments, Less than 12 Months	35,549	3,031
Short-term Investments, 12 Months or Greater	68,137	28,456
Short-term Investments, fair value	$103,686	$31,487

Summary_of_Significant_Account8

Summary of Significant Accounting Policies - Summary of Depreciation Expenses on Internally Developed Software and Website Development Costs (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Depreciation and Other Amortization Expenses [Line Items]	'	'	'	'
Depreciation expense on internally developed software and website development costs	'	'	$12,091	$9,835
Internally Developed Software and Website Development Costs [Member]	'	'	'	'
Depreciation and Other Amortization Expenses [Line Items]	'	'	'	'
Depreciation expense on internally developed software and website development costs	$1,343	$1,008	$3,947	$2,760

Summary_of_Significant_Account9

Summary of Significant Accounting Policies - Summary of Excess Tax (Expense) Benefit (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accounting Policies [Abstract]	'	'	'	'
Excess tax (expense) benefit from stock-based compensation	$1,362	$1,992	$2,583	$6,237

Recovered_Sheet1

Summary of Significant Accounting Policies - Summary of Foreign Exchange Expense (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accounting Policies [Abstract]	'	'	'	'
Foreign exchange gain (loss)	($1,432)	($482)	($6,421)	($1,950)

Recovered_Sheet2

Summary of Significant Accounting Policies - Schedule of Fair Value and Notional Amounts of Outstanding or Unsettled Derivative Instruments (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]	'	'
Notional Amount	$158,000	'
Not Designated as Hedging Instruments [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Notional Amount	175,664	104,812
Not Designated as Hedging Instruments [Member] \| Accrued expenses [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Notional Amount	15,626	84,292
Not Designated as Hedging Instruments [Member] \| Prepaid expenses and other current assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Notional Amount	160,038	20,520
Not Designated as Hedging Instruments [Member] \| (Level 2) [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Gross Amount of Recognized Assets/Liabilities	10,040	-616
Gross Amounts Offset in the Balance Sheet	'	'
Net Amount Presented in the Balance Sheet	10,040	-616
Not Designated as Hedging Instruments [Member] \| (Level 2) [Member] \| Accrued expenses [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Gross Amount of Recognized Assets/Liabilities	-447	-979
Gross Amounts Offset in the Balance Sheet	-260	'
Net Amount Presented in the Balance Sheet	-187	-979
Not Designated as Hedging Instruments [Member] \| (Level 2) [Member] \| Prepaid expenses and other current assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Gross Amount of Recognized Assets/Liabilities	10,487	363
Gross Amounts Offset in the Balance Sheet	-260	'
Net Amount Presented in the Balance Sheet	$10,227	$363

Business_Combinations_Glad_to_

Business Combinations - Glad to Have You, Inc. - Additional Information (Detail) (Glad to Have You Inc [Member], USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014
Business Acquisition [Line Items]	'
Business acquisition aggregate purchase price	$16,791
Seller obligations release description	'Two business days following the first anniversary date of the acquisition.
Business acquisition, cash consideration purchase price deposited in escrow	250
Business acquisition, cash consideration deposited in escrow and pending purchase price adjustments	$250
Finite-lived intangible asset, weighted-average amortization period	'7 years
Trade names [Member]	'
Business Acquisition [Line Items]	'
Finite-lived intangible asset, weighted-average amortization period	'10 years
Developed technology [Member]	'
Business Acquisition [Line Items]	'
Finite-lived intangible asset, weighted-average amortization period	'5 years
Customer relationships [Member]	'
Business Acquisition [Line Items]	'
Finite-lived intangible asset, weighted-average amortization period	'10 years
Non-competition agreements [Member]	'
Business Acquisition [Line Items]	'
Finite-lived intangible asset, weighted-average amortization period	'3 years

Business_Combinations_Fair_Val

Business Combinations - Fair Value of Acquisition Amounts at Acquisition Date (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012
Net tangible assets (liabilities) acquired	'	'	'	'
Goodwill	$510,103	'	$507,611	$312,412
Net purchase price	17,847	11,620	'	'
Glad to Have You Inc [Member]	'	'	'	'
Net tangible assets (liabilities) acquired	'	'	'	'
Cash	25	'	'	'
Deferred revenue	-65	'	'	'
Other	17	'	'	'
Total net tangible assets (liabilities) acquired	-23	'	'	'
Deferred tax liabilities	-1,653	'	'	'
Goodwill	11,647	'	'	'
Purchase price	16,791	'	'	'
Less: Cash acquired	-25	'	'	'
Net purchase price	16,766	'	'	'
Glad to Have You Inc [Member] \| Developed technology [Member]	'	'	'	'
Net tangible assets (liabilities) acquired	'	'	'	'
Amortizable intangible assets	3,760	'	'	'
Glad to Have You Inc [Member] \| Customer relationships [Member]	'	'	'	'
Net tangible assets (liabilities) acquired	'	'	'	'
Amortizable intangible assets	1,643	'	'	'
Glad to Have You Inc [Member] \| Non-competition agreements [Member]	'	'	'	'
Net tangible assets (liabilities) acquired	'	'	'	'
Amortizable intangible assets	240	'	'	'
Glad to Have You Inc [Member] \| Trade names [Member]	'	'	'	'
Net tangible assets (liabilities) acquired	'	'	'	'
Amortizable intangible assets	$1,177	'	'	'

Business_Combinations_Addition

Business Combinations - Additional Information (Detail)	9 Months Ended
Business Combinations - Additional Information (Detail)	Sep. 30, 2014
Minimum [Member]	'
Business Acquisition [Line Items]	'
Identifiable intangible assets, estimated useful lives	'3 years
Maximum [Member]	'
Business Acquisition [Line Items]	'
Identifiable intangible assets, estimated useful lives	'10 years

Business_Combinations_Stayz_Ad

Business Combinations - Stayz - Additional Information (Detail) (USD $)	9 Months Ended			12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Dec. 31, 2013
	Sep. 30, 2014	Sep. 30, 2013	Stayz [Member]	Stayz [Member]
Business Acquisition [Line Items]	'	'	'	'
Percentage of ownership interest	'	'	100.00%	'
Payment made to acquire business, net of cash acquired	$17,847,000	$11,620,000	$197,820,000	'
Business acquisition transaction costs	'	'	3,802,000	'
Business acquisition aggregate purchase price	'	'	196,739,000	'
Business acquisition amount paid to sellers	'	'	1,081,000	'
Decrease in proforma revenue based on adjustments	'	'	'	-1,900,000
Decrease in proforma net income based on adjustments	'	'	'	($1,300,000)

Business_Combinations_Pro_Form

Business Combinations - Pro Forma Results (Detail) (Stayz [Member], USD $)	3 Months Ended	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2013
Stayz [Member]	'	'	'
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]	'	'	'
Pro forma total revenue	$95,796	$275,241	$370,620
Pro forma net income	$9,693	$23,637	$28,687

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets - Changes in Goodwill Balance (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'	'
Beginning balance	$507,611	$312,412
Acquired in business combinations	11,647	198,124
Foreign currency translation adjustment	-9,666	-2,925
Post-acquisition goodwill adjustment for the Stayz acquisition	511	'
Ending balance	$510,103	$507,611

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2012	Stayz [Member]
Goodwill [Line Items]	'	'	'	'
Increase in goodwill	'	'	'	$511
Goodwill	$510,103	$507,611	$312,412	$178,288

Goodwill_and_Other_Intangible_4

Goodwill and Other Intangible Assets - Amortized Finite-Lived Intangible Assets (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$151,050	$147,252
Accumulated Amortization	-81,945	-73,616
Net Carrying Amount	69,105	73,636
Minimum [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Finite-lived intangible asset useful life	'3 years	'
Maximum [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Finite-lived intangible asset useful life	'10 years	'
Trade names and trademarks [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Finite-lived intangible asset useful life	'10 years	'
Gross Carrying Amount	30,915	30,066
Accumulated Amortization	-7,292	-5,050
Net Carrying Amount	23,623	25,016
Developed technology [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	34,609	31,513
Accumulated Amortization	-25,582	-23,646
Net Carrying Amount	9,027	7,867
Developed technology [Member] \| Minimum [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Finite-lived intangible asset useful life	'2 years	'
Developed technology [Member] \| Maximum [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Finite-lived intangible asset useful life	'8 years	'
Customer relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	80,156	80,510
Accumulated Amortization	-45,250	-41,739
Net Carrying Amount	34,906	38,771
Customer relationships [Member] \| Minimum [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Finite-lived intangible asset useful life	'6 years	'
Customer relationships [Member] \| Maximum [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Finite-lived intangible asset useful life	'14 years	'
Noncompete agreements and domain names [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	5,370	5,163
Accumulated Amortization	-3,821	-3,181
Net Carrying Amount	$1,549	$1,982
Noncompete agreements and domain names [Member] \| Minimum [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Finite-lived intangible asset useful life	'2 years	'
Noncompete agreements and domain names [Member] \| Maximum [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Finite-lived intangible asset useful life	'5 years	'

Goodwill_and_Other_Intangible_5

Goodwill and Other Intangible Assets - Summary of Amortization Expense (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'	'	'	'
Amortization expense	$3,397	$2,730	$10,163	$8,905

Goodwill_and_Other_Intangible_6

Goodwill and Other Intangible Assets - Indefinite-Lived Intangible Assets (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'	'
Trademarks, trade names and other	$7,029	$7,029

Accrued_Expenses_Accrued_Expen

Accrued Expenses - Accrued Expenses (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
Payables and Accruals [Abstract]	'	'	'
Compensation and related benefits	$20,395	$21,700	'
Gift cards	4,147	6,090	'
Contracting, consulting and professional fees	2,642	4,494	'
Taxes	5,658	3,425	'
Marketing	4,742	3,197	'
Foreign exchange - forward contracts	187	979	'
Traveler guarantee liability	2,194	956	566
Other	7,091	13,784	'
Total	$47,056	$54,625	'

Convertible_Senior_Notes_Summa

Convertible Senior Notes - Summary of Convertible Senior Notes (Detail) (Convertible Senior Notes 0.125% due April 1, 2019 [Member], USD $)	Sep. 30, 2014	Mar. 31, 2014
In Thousands, unless otherwise specified	Sep. 30, 2014	Mar. 31, 2014
Convertible Senior Notes 0.125% due April 1, 2019 [Member]	'	'
Debt Instrument [Line Items]	'	'
Par Value	$402,500	$402,500
Equity Component Recorded at Issuance	90,887	'
Carrying Value of Convertible Senior Notes	$311,738	'

Convertible_Senior_Notes_Summa1

Convertible Senior Notes - Summary of Convertible Senior Notes (Parenthetical) (Detail) (Convertible Senior Notes 0.125% due April 1, 2019 [Member])	9 Months Ended
	Sep. 30, 2014	Mar. 31, 2014
Convertible Senior Notes 0.125% due April 1, 2019 [Member]	'	'
Debt Instrument [Line Items]	'	'
Senior notes, Interest rate	0.13%	0.13%
Senior notes, Maturity date	1-Apr-19	'

Convertible_Senior_Notes_Addit

Convertible Senior Notes - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Mar. 31, 2014	Sep. 30, 2014
	Mar. 31, 2014	TradingDay
Debt Instrument [Line Items]	'	'
Closing price of common stock	'	$35.50
Warrants price per unit	'	$81.14
Term issuance of warrants	'	'5 years
(Level 2) [Member]	'	'
Debt Instrument [Line Items]	'	'
Total estimated fair value of the notes	'	$308,000,000
0.125% Senior Notes [Member]	'	'
Debt Instrument [Line Items]	'	'
Deferred tax liability	'	800,000
Convertible Senior Notes 0.125% due April 1, 2019 [Member]	'	'
Debt Instrument [Line Items]	'	'
Interest rate	0.13%	0.13%
Debt par value	402,500,000	402,500,000
Semi-annual first interest is payable	'--04-01	'
Semi-annual second interest is payable	'--10-01	'
Interest is payable start date	1-Oct-14	'
Debt conversion description	'	'During any calendar quarter commencing after June 30, 2014, if, for at least 20 trading days during the 30 consecutive trading day period ending on the last trading day of the immediately preceding calendar quarter, the last reported sales price of the Company's common stock for such trading day is greater than or equal to 130% of the applicable conversion price for the Notes on each applicable trading day
Debt instrument convertible threshold trading days	'	20
Common stock closing sales price percentage	'	130.00%
Percentage of trading price for conversion of note	'	98.00%
Consecutive trading period	'	'5 days
Principal amount	'	$1,000
Percentage of principal amount of notes	'	100.00%

Convertible_of_Senior_Notes_Sc

Convertible of Senior Notes - Schedule of Conversion of Senior Notes to Common Stock (Detail) (0.125% Senior Notes [Member], USD $)	9 Months Ended
	Sep. 30, 2014
0.125% Senior Notes [Member]	'
Debt Instrument [Line Items]	'
Debt instrument conversion rate	19.1703
Initial conversion price per share	$52.16
Free Convertibility Date	1-Oct-18

Convertible_of_Senior_Notes_Sc1

Convertible of Senior Notes - Schedule of Conversion of Senior Notes (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]	'	'
Net carrying amount	$311,738	'
0.125% Senior Notes [Member]	'	'
Debt Instrument [Line Items]	'	'
Principal: 0.125% Senior Notes	402,500	'
Less: debt discount, net	'	'
0.125% Senior Notes	-90,762	'
Net carrying amount	$311,738	'

Convertible_of_Senior_Notes_Su

Convertible of Senior Notes - Summary of Hedge Notes (Detail) (USD $)	9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014
Derivatives, Fair Value [Line Items]	'
Note Hedges, Purchases	$85,853
Note Hedges [Member]	'
Derivatives, Fair Value [Line Items]	'
Note Hedges, Contract Date	'2014-03
Note Hedges, Purchases	$85,853
Underlying Note Hedges, Shares	7,716,049

Convertible_of_Senior_Notes_Co

Convertible of Senior Notes - Components of Warrants (Detail) (USD $)	9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014
Class of Warrant or Right [Line Items]	'
Warrants, proceed amount	$38,278
Warrants, shares	7,716,049
Warrants, strike price	$81.14
Warrants [Member]	'
Class of Warrant or Right [Line Items]	'
Warrants, proceed amount	$38,278

Convertible_Senior_Notes_Sched

Convertible Senior Notes - Schedule of Total Interest Expense Recognized (Detail) (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2014
Debt Disclosure [Abstract]	'	'
0.125% coupon	$126	$252
Amortization of debt issuance costs	13	26
Amortization of debt discount	4,378	8,694
Capitalized interest	-144	-144
Total	$4,373	$8,828

Commitments_and_Contingencies_1

Commitments and Contingencies - Summary of Rental Expenses (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Leases [Abstract]	'	'	'	'
Rental expense	$1,911	$1,341	$5,134	$3,835

Commitments_and_Contingencies_2

Commitments and Contingencies - Additional Information (Detail)	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014
	Basic Rental Guarantee [Member]	Carefree Rental Guarantee [Member]	Subsidiary's Bank Credit, United Kingdom [Member]	Subsidiary's Bank Credit, United Kingdom [Member]
	USD ($)	USD ($)	United Kingdom [Member]	United Kingdom [Member]
			USD ($)	GBP (£)
Commitments and Contingencies [Line Items]	'	'	'	'
Guarantee maximum exposure, percentage	'	100.00%	'	'
Guarantee maximum exposure amount	$1,000	$10,000	$8,109,000	£ 5,000,000

Commitments_and_Contingencies_3

Commitments and Contingencies - Changes for Traveler Guarantees (Detail) (USD $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'	'
Traveler guarantee liability, beginning balance	$956	$566
Costs accrued for new vacation rentals	3,136	2,230
Guarantee obligations honored	-1,898	-1,840
Traveler guarantee liability, ending balance	$2,194	$956

StockBased_Compensation_Additi

Stock-Based Compensation - Additional Information (Detail) (Stock Incentive Plan 2011 [Member], USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Stock Based Compensation And Stockholders Equity [Line Items]	'	'
Restricted stock units issued, aggregate fair value	$8,607,000	$54,963,000
Restricted stock units [Member]	'	'
Stock Based Compensation And Stockholders Equity [Line Items]	'	'
Share based compensation, Number of shares issued	258,046	1,506,292
Stock options [Member]	'	'
Stock Based Compensation And Stockholders Equity [Line Items]	'	'
Share based compensation, Number of shares issued	139,479	961,634
Common stock issued pursuant to stock awards, aggregate fair value	$1,663,000	$12,954,000

StockBased_Compensation_Total_

Stock-Based Compensation - Total Stock-Based Compensation Expense (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	$12,671	$9,997	$35,582	$27,589
Cost of revenue [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	847	720	2,415	2,392
Product development [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	3,485	2,515	9,589	6,743
Sales and marketing [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	2,763	2,349	7,868	6,235
General and administrative [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	$5,576	$4,413	$15,710	$12,219

Redeemable_Noncontrolling_Inte2

Redeemable Noncontrolling Interests - Additional Information (Detail)	Dec. 31, 2013
travelmob [Member]	'
Redeemable Noncontrolling Interest [Line Items]	'
Percentage of ownership interest	68.50%
Bookabach [Member]	'
Redeemable Noncontrolling Interest [Line Items]	'
Percentage of ownership interest	55.00%

Redeemable_Noncontrolling_Inte3

Redeemable Noncontrolling Interests - Schedule of Changes of Redeemable Noncontrolling Interests (Detail) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2013
Business Combinations [Abstract]	'	'	'
Beginning balance	'	$10,584	'
Fair value at acquisition	'	'	10,966
Net loss attributable to noncontrolling interests	'	-1,233	-395
Changes to redemption value of noncontrolling interests	'	851	'
Currency translation adjustments	12	29	13
Ending balance	$10,231	$10,231	$10,584

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income Loss [Abstract]	'	'
Foreign currency translation	($13,191)	($6,728)
Unrealized losses on short-term investments	-661	-19
Total	($13,852)	($6,747)

Income_Taxes_Summary_of_Income

Income Taxes - Summary of Income Tax Expenses (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Income tax expense	$845	$4,312	$5,909	$9,143
Effective tax rate	13.90%	34.00%	31.50%	32.40%

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Discrete tax benefit	$2.50

Net_Income_Per_Share_Attributa2

Net Income Per Share Attributable to HomeAway, Inc. - Computation of Basic and Diluted Net Income Per Share of Common Stock (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Numerator	'	'	'	'
Net income attributable to HomeAway, Inc.	$4,912	$8,478	$13,222	$19,243
Denominator	'	'	'	'
Weighted average common shares outstanding-basic	94,106	85,452	93,507	84,805
Dilutive effect of stock options, warrants and restricted stock units	2,283	2,763	2,851	2,933
Weighted average common shares outstanding-diluted	96,389	88,215	96,358	87,738
Net income per share:	'	'	'	'
Basic	$0.05	$0.10	$0.14	$0.23
Diluted	$0.05	$0.10	$0.14	$0.22

Net_Income_Per_Share_Attributa3

Net Income Per Share Attributable to HomeAway, Inc. - Common Equivalent Shares Excluded from Calculation of Net Income Per Share as their Inclusion Would have been Anti-Dilutive (Detail)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Common equivalent shares excluded from the calculation of net income per share	10,382	3,250	9,803	3,130
Stock Option [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Common equivalent shares excluded from the calculation of net income per share	2,604	3,250	2,038	3,098
Restricted stock units [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Common equivalent shares excluded from the calculation of net income per share	62	'	49	32
Warrants [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Common equivalent shares excluded from the calculation of net income per share	7,716	'	7,716	'

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	Sep. 30, 2014	Oct. 31, 2014
Subsequent Events - Additional Information (Detail) (USD $)	Sep. 30, 2014	Subsequent Event [Member]
Subsequent Event [Line Items]	'	'
Amount invested in non-controlling equity interest	$19,498,000	$15,000,000