SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
Dec. 31, 2012
Summary Of Significant Accounting Policies Disclosure [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation — The Company’s Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries, including priceline.com International Ltd. ("PIL"), Booking.com B.V., Booking.com Limited, priceline.com Europe Ltd, priceline.com Mauritius Company Limited (formerly known as Agoda Company, Ltd.), and its majority-owned interest in TravelJigsaw Holdings Limited (known now as the rentalcars.com business) since its acquisition in May 2010. All intercompany accounts and transactions have been eliminated in consolidation. Use of Estimates — The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the financial statements and footnotes thereto. Actual results may differ significantly from those estimates. The significant estimates underlying the Company’s Consolidated Financial Statements relate to, among other things, the deferred tax valuation allowance, the accrual for hotel occupancy and other related taxes, stock-based compensation, the allowance for doubtful accounts, the valuation of goodwill and long-lived assets and intangibles and the valuation of redeemable noncontrolling interests. Fair Value of Financial Instruments — The Company’s financial instruments, including cash, restricted cash, accounts receivable, accounts payable, accrued expenses and deferred merchant bookings, are carried at cost which approximates their fair value because of the short-term nature of these financial instruments. See Notes 4, 5, 11 and 13 for information on fair value for investments, derivatives, the Company’s outstanding Convertible Senior Notes, and redeemable noncontrolling interests. Cash and Cash Equivalents — Cash and cash equivalents consists primarily of cash and highly liquid investment grade securities with an original maturity of three months or less. Restricted Cash — Restricted cash at December 31, 2012 and 2011 collateralizes office leases and supplier obligations. Investments — The Company has classified its investments as available-for-sale securities. These securities are carried at estimated fair value with the aggregate unrealized gains and losses related to these investments, net of taxes, reflected as a part of "Accumulated other comprehensive loss" within stockholders’ equity. The fair value of the investments is based on the specific quoted market price of the securities or comparable securities at the balance sheet dates. Investments in debt securities are considered to be impaired when a decline in fair value is judged to be other than temporary because the Company either intends to sell or it is more-likely-than not that it will have to sell the impaired security before recovery. Once a decline in fair value is determined to be other than temporary, an impairment charge is recorded and a new cost basis in the investment is established. If the Company does not intend to sell the debt security, but it is probable that the Company will not collect all amounts due, then only the impairment due to the credit risk would be recognized in earnings and the remaining amount of the impairment would be recognized in "Accumulated other comprehensive loss" within stockholders’ equity. The marketable securities are presented as current assets on the Company’s Consolidated Balance Sheets, if they are available to meet the short-term working capital needs of the Company. See Notes 4 and 5 for further detail of investments. Property and Equipment — Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization of property and equipment is computed on a straight-line basis over the estimated useful lives of the assets or, when applicable, the life of the lease, whichever is shorter. Goodwill — The Company accounts for acquired businesses using the purchase method of accounting which requires that the assets acquired and liabilities assumed be recorded at the date of acquisition at their respective fair values. Any excess of the purchase price over the estimated fair values of the net assets acquired is recorded as goodwill. The Company’s Consolidated Financial Statements reflect an acquired business starting at the date of the acquisition. Goodwill is not subject to amortization and is reviewed at least annually for impairment, or earlier if an event occurs or circumstances change and there is an indication of impairment. The Company tests goodwill at a reporting unit level. The fair value of the reporting unit is compared to its carrying value, including goodwill. Fair values are determined based on discounted cash flows, market multiples or appraised values and are based on market participant assumptions. An impairment is recorded to the extent that the implied fair value of goodwill is less than the carrying value of goodwill. See Note 9 for further information. Impairment of Long-Lived Assets and Intangible Assets — The Company reviews long-lived assets and amortizable intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. The assessment of possible impairment is based upon the Company’s ability to recover the carrying value of the assets from the estimated undiscounted future net cash flows, before interest and taxes, of the related operations. The amount of impairment loss, if any, is measured as the excess of the carrying value of the asset over the present value of estimated future cash flows, using a discount rate commensurate with the risks involved and based on assumptions representative of market participants. Software Capitalization — Certain direct development costs associated with internal-use software are capitalized and include external direct costs of services and payroll costs for employees devoting time to the software projects principally related to software coding, designing system interfaces and installation and testing of the software. These costs are recorded as property and equipment and are generally amortized over a period of three to five years beginning when the asset is substantially ready for use. Costs incurred during the preliminary project stage, as well as maintenance and training costs, are expensed as incurred. Agency Revenues Agency revenues are derived from travel related transactions where the Company is not the merchant of record and where the prices of the services sold are determined by third parties. Agency revenues include travel commissions, global distribution system ("GDS") reservation booking fees and customer processing fees, and are reported at the net amounts received, without any associated cost of revenue. Such revenues are generally recognized by the Company when the customers complete their travel. Merchant Revenues and Cost of Merchant Revenues Merchant revenues and related cost of revenues are derived from services where the Company is the merchant of record and therefore charges the customer's credit card and subsequently pays the travel service provider for the services provided. Opaque Services: The Company refers to its Name Your Own Price^® and Express Deals services as "opaque" services because not all aspects of the travel service are visible to the consumer before making an offer. The Name Your Own Price^® service connects buyers that are willing to accept a level of flexibility regarding their travel itinerary with travel service providers that are willing to accept a lower price in order to sell their excess capacity without disrupting their existing distribution channels or retail pricing structures. The Company's Name Your Own Price^® services use a unique pricing system that allows consumers to “bid” the price they are prepared to pay when submitting an offer for a particular leisure travel service. The Company accesses databases in which participating travel service providers file secure discounted rates, not generally available to the public, to determine whether it can fulfill the customer's offer. The Company selects the travel service provider and determines the price it will accept from the customer. Merchant revenues and cost of merchant revenues include the selling price and cost, respectively, of the Name Your Own Price^® travel services and are reported on a gross basis. In 2012, the Company launched Express Deals, a merchant semi-opaque hotel reservation service at priceline.com, which allows customers to select hotel reservations with price and certain information regarding amenities offered by the hotel disclosed prior to making the reservation. The identity of the hotel is not known prior to committing to the non-refundable reservation. The Company records the difference between the customer selling price and the provider cost of its merchant Express Deals reservation services on a net basis in merchant revenue. The Company recognizes revenues and costs for these services when it fulfills the customer's non-refundable offer. In very limited circumstances, the Company makes certain customer accommodations to satisfy disputes and complaints. The Company accrues for such estimated losses and classifies the resulting expense as adjustments to merchant revenue and cost of merchant revenues. Merchant Price-Disclosed Services: Merchant revenues for the Company's merchant price-disclosed services are derived from transactions where its customers purchase hotel room reservations or rental car reservations from travel service providers at disclosed rates which are subject to contractual arrangements. Charges are billed to customers by the Company at the time of booking and are included in deferred merchant bookings until the customer completes the hotel stay or returns the rental car. Such amounts are generally refundable upon cancellation, subject to cancellation penalties in certain cases. Merchant revenues and accounts payable to the provider are recognized at the conclusion of the customer's stay at the hotel or return of the rental car. The Company records the difference between the customer selling price and the travel service provider cost of its merchant price-disclosed reservation services on a net basis in merchant revenue. Pursuant to the terms of the Company's opaque and price-disclosed merchant hotel services, its hotel service providers are permitted to bill the Company for the underlying cost of the service during a specified period of time. In the event that the Company is not billed by the hotel within the specified time period, the Company reduces its cost of revenues by the unbilled amounts. Tax Recovery Charge, Occupancy Taxes and State and Local Taxes The Company provides an internet travel service to facilitate online travel purchases between consumers and travel service providers, including airline ticket, hotel and rental car reservations, and sometimes as part of a vacation package reservation. For merchant model transactions, the Company charges the customer an amount intended to cover the taxes that the Company anticipates the travel service provider will owe and remit to the local taxing authorities ("tax recovery charge"). Tax rate information for calculating the tax recovery charge is provided to the Company by its providers. In a handful of taxing jurisdictions, the Company recently was required by passage of a new statute or by court order to start collecting and remitting certain taxes (local occupancy tax, general excise and/or sales tax) imposed upon its margin and/or service fee. In those jurisdictions, the Company is collecting and remitting tax on its margin and/or service fee. Except in those jurisdictions, the Company does not charge the customer or remit occupancy or other related taxes based on its margin or service fee, because the Company believes that such taxes are not owed on its compensation for its services (refer to Note 16). The tax recovery charge and occupancy and other related taxes collected from customers and remitted to those jurisdictions are reported on a net basis on the Consolidated Statement of Operations. Advertising - Online — Online advertising expenses consist primarily of the costs of (1) search engine keyword purchases; (2) referrals from meta-search sites and travel research websites; (3) affiliate programs; (4) banner and pop-up advertisements; and (5) email campaigns. Online advertising expense is generally recognized as incurred. Included in "Accrued expenses and other current liabilities" on the Consolidated Balance Sheets are accrued online advertising liabilities of $99.6 million and $69.2 million at December 31, 2012 and 2011, respectively. Advertising - Offline — Offline advertising expenses are comprised primarily of costs of domestic television, print, and radio advertising for priceline.com. The Company expenses the production costs of advertising the first time the advertising takes place. Sales and Marketing — Sales and marketing expenses consist primarily of (1) credit card processing fees associated with merchant transactions; (2) fees paid to third-parties that provide call center, website content translations and other services; (3) provisions for credit card chargebacks; and (4) provisions for bad debt, primarily related to agency hotel commission receivables. Personnel — Personnel expenses consist of compensation to the Company’s personnel, including salaries, bonuses, payroll taxes, employee health insurance and other benefits, and stock based compensation. Included in "Accrued expenses and other current liabilities" on the Consolidated Balance Sheets are accrued compensation liabilities of $97.9 million and $65.7 million at December 31, 2012 and 2011, respectively. Stock-Based Compensation — The cost of stock-based transactions are recognized in the financial statements based upon fair value. The fair value of restricted stock, performance share units and restricted stock units is determined based on the number of units or shares, as applicable, granted and the quoted price of the Company’s common stock as of the grant date. Stock-based compensation related to performance share units reflects the estimated probable outcome at the end of the performance period. The fair value of stock options is determined as of the grant date using the Black-Scholes valuation model. Fair value is recognized as expense on a straight line basis, net of estimated forfeitures, over the employee requisite service period. The fair value at grant date for restricted stock units with a market condition is estimated, based on the complexity of the award, using both closed-form models and lattice models. All compensation cost for an award that has a market condition is recognized as stock based compensation cost if the requisite service period is fulfilled, even if the market condition is never satisfied. The benefits of tax deductions in excess of recognized compensation costs are reported as a credit to additional paid-in capital and as financing cash flows, but only when such excess tax benefits are realized by a reduction to current taxes payable. See Note 3 for further information on stock-based awards. Information Technology — Information technology expenses are comprised primarily of outsourced data center costs, system maintenance and software license fees, data communications and other expenses associated with operating the Company’s Internet sites and payments to outside contractors. Such costs are expensed as incurred. Income Taxes — The Company accounts for income taxes under the asset and liability method. The Company records the estimated future tax effects of temporary differences between the tax bases of assets and liabilities and amounts reported on the Consolidated Balance Sheets, as well as operating loss and tax credit carryforwards. Deferred taxes are classified as current or noncurrent based on the balance sheet classification of the related assets and liabilities. The Company records deferred tax assets to the extent it believes these assets will more likely than not be realized. The Company regularly reviews its deferred tax assets for recoverability considering historical profitability, projected future taxable income, the expected timing of the reversals of existing temporary differences, the carryforward periods available for tax reporting purposes, and tax planning strategies. A valuation allowance is provided when it is more likely than not that some portion or all of a deferred tax asset will not be realized. The ultimate realization of deferred tax assets depends on the generation of future taxable income during the period in which related temporary differences become deductible. In determining the future tax consequences of events that have been recognized in the financial statements or tax returns, significant judgments, estimates, and interpretation of statutes are required. Deferred taxes are measured using the enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred taxes of a change in tax rates is recognized in income in the period that includes the enactment date of such change. Income taxes are not accrued for unremitted earnings of international operations that have been or are intended to be reinvested indefinitely. The Company recognizes liabilities when it believes that uncertain positions may not be fully sustained upon review by the tax authorities. Liabilities recognized for uncertain tax positions are based on a two step approach for recognition and measurement. First, the Company evaluates the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not that the position will be sustained on audit based on its technical merits. Secondly, the Company measures the tax benefit as the largest amount which is more than 50% likely of being realized upon ultimate settlement. Interest and penalties attributable to uncertain tax positions, if any, are recognized as a component of income tax expense. See Note 15 for further details on income taxes. Segment Reporting — The Company operates and manages its business as a single reportable unit. Operating segments that have similar economic characteristics are aggregated. For geographic related information, see Note 18 to the Company’s Consolidated Financial Statements. Foreign Currency Translation — The functional currency of the Company’s foreign subsidiaries is generally their respective local currency. Assets and liabilities are translated into U.S. dollars at the rate of exchange existing at the balance sheet date. Income statement amounts are translated at average monthly exchange rates applicable for the period. Translation gains and losses are included as a component of "Accumulated other comprehensive loss" on the Company’s Consolidated Balance Sheets. Foreign currency transaction gains and losses are included in "Foreign currency transactions and other" in the Company’s Consolidated Statements of Operations. 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 flow 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 and British Pound Sterling, in which it conducts a significant portion of its business activities. As a result, the Company faces exposure to adverse movements in currency exchange rates as the financial results of its international 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 income. The Company may enter into derivative instruments to hedge certain net exposures of nonfunctional currency denominated assets and liabilities and the volatility associated with translating foreign earnings into U.S. Dollars, 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 income in the period in which the change occurs and are recognized on the Consolidated Statements of Operations in "Foreign currency transactions and other." Cash flows related to these contracts are classified within "Net cash provided by operating activities" on the cash flow statement. The Company also utilizes derivative instruments to hedge the impact of changes in currency exchange rates on the net assets of its foreign subsidiaries. These instruments are designated as net investment hedges. Hedge ineffectiveness is assessed and measured based on changes in forward exchange rates. The Company records gains and losses on these derivative instruments as currency translation adjustments, which offset a portion of the translation adjustments related to the foreign subsidiary’s net assets. Gains and losses are recognized on the Consolidated Balance Sheet in "Accumulated other comprehensive loss" and will be realized upon a partial sale or liquidation of the investment. The Company formally documents all derivatives designated as hedging instruments for accounting purposes, both at hedge inception and on an on-going basis. These net investment hedges expose the Company to liquidity risk as the derivatives have an immediate cash flow impact upon maturity, which is not offset by the translation of the underlying hedged equity. The cash flows from these contracts are classified within "Net cash used in investing activities" on the cash flow statement. 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 derivative instruments do not contain leverage features. The Company is exposed to the risk that counterparties to derivative contracts may fail to meet their contractual obligations. The Company regularly reviews its credit exposure as well as assessing the creditworthiness of its counterparties. See Note 5 for further detail on derivatives. Recent Accounting Pronouncements On January 1, 2012, the Company adopted the amended accounting guidance issued by the Financial Accounting Standards Board ("FASB") concerning the presentation of comprehensive income. The new guidance requires comprehensive income to be reported in either a single statement or in two consecutive statements reporting net income and other comprehensive income. The Company selected to present two consecutive statements. This amended guidance did not change the items that constitute net income or other comprehensive income, the timing of when other comprehensive income is reclassified to net income, or the earnings per share computation. In February 2013, the FASB issued new accounting guidance which adds new disclosure requirements for items reclassified out of accumulated other comprehensive income. The new guidance requires that companies present either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified based on its source and is effective for public companies in interim and annual reporting periods beginning after December 13, 2012. The Company will comply with the new disclosure requirements beginning in the first quarter of 2013. In September 2011, the FASB issued an accounting update, which amended the guidance on testing goodwill for impairment. Under the revised guidance, entities testing goodwill for impairment have the option of performing a qualitative assessment before calculating the fair value of the reporting unit. If, based on the qualitative factors, it is more-likely-than not that the fair value of the reporting unit is less than its carrying value, then the unchanged two-step approach previously used would be required. The new accounting guidance did not change how goodwill is calculated, how goodwill is assigned to the reporting unit, or the requirements for testing goodwill annually or when events and circumstances warrant testing. The accounting update was effective for annual and interim periods beginning after December 15, 2011, with early adoption permitted. In September 2012, the Company performed its annual quantitative goodwill impairment testing, and concluded that the estimated fair value for each reporting unit substantially exceeds its respective carrying value. In May 2010, the FASB issued amended guidance on fair value to largely achieve common fair value measurement and disclosure requirements between U.S. GAAP and IFRS. The new accounting guidance did not extend the use of fair value but rather provided guidance about how fair value should be determined. For U.S. GAAP, most of the changes were clarifications of existing guidance or wording changes to align with IFRS. The amended guidance expanded disclosure, particularly that relating to fair value measurements based on unobservable inputs, permitted fair value measurements for financial assets and liabilities on a net position if market or credit risks are managed on a net basis and other criteria are met, and allowed premiums and discounts only if a market participant would also include them in the fair value measurement. This accounting update was effective for public companies for interim or annual periods beginning after December 15, 2011, with early adoption permitted. The adoption of this accounting guidance, effective with the three months ended March 31, 2012, did not impact the Company's consolidated financial statements or disclosure.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation — The Company’s Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries, including priceline.com International Ltd. ("PIL"), Booking.com B.V., Booking.com Limited, priceline.com Europe Ltd, priceline.com Mauritius Company Limited (formerly known as Agoda Company, Ltd.), and its majority-owned interest in TravelJigsaw Holdings Limited (known now as the rentalcars.com business) since its acquisition in May 2010. All intercompany accounts and transactions have been eliminated in consolidation.

Use of Estimates — The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the financial statements and footnotes thereto. Actual results may differ significantly from those estimates. The significant estimates underlying the Company’s Consolidated Financial Statements relate to, among other things, the deferred tax valuation allowance, the accrual for hotel occupancy and other related taxes, stock-based compensation, the allowance for doubtful accounts, the valuation of goodwill and long-lived assets and intangibles and the valuation of redeemable noncontrolling interests.

Fair Value of Financial Instruments — The Company’s financial instruments, including cash, restricted cash, accounts receivable, accounts payable, accrued expenses and deferred merchant bookings, are carried at cost which approximates their fair value because of the short-term nature of these financial instruments. See Notes 4, 5, 11 and 13 for information on fair value for investments, derivatives, the Company’s outstanding Convertible Senior Notes, and redeemable noncontrolling interests.

Cash and Cash Equivalents — Cash and cash equivalents consists primarily of cash and highly liquid investment grade securities with an original maturity of three months or less.

Restricted Cash — Restricted cash at December 31, 2012 and 2011 collateralizes office leases and supplier obligations.

Investments — The Company has classified its investments as available-for-sale securities. These securities are carried at estimated fair value with the aggregate unrealized gains and losses related to these investments, net of taxes, reflected as a part of "Accumulated other comprehensive loss" within stockholders’ equity.

The fair value of the investments is based on the specific quoted market price of the securities or comparable securities at the balance sheet dates. Investments in debt securities are considered to be impaired when a decline in fair value is judged to be other than temporary because the Company either intends to sell or it is more-likely-than not that it will have to sell the impaired security before recovery. Once a decline in fair value is determined to be other than temporary, an impairment charge is recorded and a new cost basis in the investment is established. If the Company does not intend to sell the debt security, but it is probable that the Company will not collect all amounts due, then only the impairment due to the credit risk would be recognized in earnings and the remaining amount of the impairment would be recognized in "Accumulated other comprehensive loss" within stockholders’ equity. The marketable securities are presented as current assets on the Company’s Consolidated Balance Sheets, if they are available to meet the short-term working capital needs of the Company. See Notes 4 and 5 for further detail of investments.

Property and Equipment — Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization of property and equipment is computed on a straight-line basis over the estimated useful lives of the assets or, when applicable, the life of the lease, whichever is shorter.

Goodwill — The Company accounts for acquired businesses using the purchase method of accounting which requires that the assets acquired and liabilities assumed be recorded at the date of acquisition at their respective fair values. Any excess of the purchase price over the estimated fair values of the net assets acquired is recorded as goodwill. The Company’s Consolidated Financial Statements reflect an acquired business starting at the date of the acquisition.

Goodwill is not subject to amortization and is reviewed at least annually for impairment, or earlier if an event occurs or circumstances change and there is an indication of impairment. The Company tests goodwill at a reporting unit level. The fair value of the reporting unit is compared to its carrying value, including goodwill. Fair values are determined based on discounted cash flows, market multiples or appraised values and are based on market participant assumptions. An impairment is recorded to the extent that the implied fair value of goodwill is less than the carrying value of goodwill. See Note 9 for further information.

Impairment of Long-Lived Assets and Intangible Assets — The Company reviews long-lived assets and amortizable intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. The assessment of possible impairment is based upon the Company’s ability to recover the carrying value of the assets from the estimated undiscounted future net cash flows, before interest and taxes, of the related operations. The amount of impairment loss, if any, is measured as the excess of the carrying value of the asset over the present value of estimated future cash flows, using a discount rate commensurate with the risks involved and based on assumptions representative of market participants.

Software Capitalization — Certain direct development costs associated with internal-use software are capitalized and include external direct costs of services and payroll costs for employees devoting time to the software projects principally related to software coding, designing system interfaces and installation and testing of the software. These costs are recorded as property and equipment and are generally amortized over a period of three to five years beginning when the asset is substantially ready for use. Costs incurred during the preliminary project stage, as well as maintenance and training costs, are expensed as incurred.

Agency Revenues

Agency revenues are derived from travel related transactions where the Company is not the merchant of record and where the prices of the services sold are determined by third parties. Agency revenues include travel commissions, global distribution system ("GDS") reservation booking fees and customer processing fees, and are reported at the net amounts received, without any associated cost of revenue. Such revenues are generally recognized by the Company when the customers complete their travel.

Merchant Revenues and Cost of Merchant Revenues

Merchant revenues and related cost of revenues are derived from services where the Company is the merchant of record and therefore charges the customer's credit card and subsequently pays the travel service provider for the services provided.

Opaque Services: The Company refers to its Name Your Own Price^® and Express Deals services as "opaque" services because not all aspects of the travel service are visible to the consumer before making an offer. The Name Your Own Price^® service connects buyers that are willing to accept a level of flexibility regarding their travel itinerary with travel service providers that are willing to accept a lower price in order to sell their excess capacity without disrupting their existing distribution channels or retail pricing structures. The Company's Name Your Own Price^® services use a unique pricing system that allows consumers to “bid” the price they are prepared to pay when submitting an offer for a particular leisure travel service. The Company accesses databases in which participating travel service providers file secure discounted rates, not generally available to the public, to determine whether it can fulfill the customer's offer. The Company selects the travel service provider and determines the price it will accept from the customer. Merchant revenues and cost of merchant revenues include the selling price and cost, respectively, of the Name Your Own Price^® travel services and are reported on a gross basis.

In 2012, the Company launched Express Deals, a merchant semi-opaque hotel reservation service at priceline.com, which allows customers to select hotel reservations with price and certain information regarding amenities offered by the hotel disclosed prior to making the reservation. The identity of the hotel is not known prior to committing to the non-refundable reservation. The Company records the difference between the customer selling price and the provider cost of its merchant Express Deals reservation services on a net basis in merchant revenue.

The Company recognizes revenues and costs for these services when it fulfills the customer's non-refundable offer. In very limited circumstances, the Company makes certain customer accommodations to satisfy disputes and complaints. The Company accrues for such estimated losses and classifies the resulting expense as adjustments to merchant revenue and cost of merchant revenues.

Merchant Price-Disclosed Services: Merchant revenues for the Company's merchant price-disclosed services are derived from transactions where its customers purchase hotel room reservations or rental car reservations from travel service providers at disclosed rates which are subject to contractual arrangements. Charges are billed to customers by the Company at the time of booking and are included in deferred merchant bookings until the customer completes the hotel stay or returns the rental car. Such amounts are generally refundable upon cancellation, subject to cancellation penalties in certain cases. Merchant revenues and accounts payable to the provider are recognized at the conclusion of the customer's stay at the hotel or return of the rental car. The Company records the difference between the customer selling price and the travel service provider cost of its merchant price-disclosed reservation services on a net basis in merchant revenue.

Pursuant to the terms of the Company's opaque and price-disclosed merchant hotel services, its hotel service providers are permitted to bill the Company for the underlying cost of the service during a specified period of time. In the event that the Company is not billed by the hotel within the specified time period, the Company reduces its cost of revenues by the unbilled amounts.

Tax Recovery Charge, Occupancy Taxes and State and Local Taxes

The Company provides an internet travel service to facilitate online travel purchases between consumers and travel service providers, including airline ticket, hotel and rental car reservations, and sometimes as part of a vacation package reservation. For merchant model transactions, the Company charges the customer an amount intended to cover the taxes that the Company anticipates the travel service provider will owe and remit to the local taxing authorities ("tax recovery charge"). Tax rate information for calculating the tax recovery charge is provided to the Company by its providers.

In a handful of taxing jurisdictions, the Company recently was required by passage of a new statute or by court order to start collecting and remitting certain taxes (local occupancy tax, general excise and/or sales tax) imposed upon its margin and/or service fee. In those jurisdictions, the Company is collecting and remitting tax on its margin and/or service fee. Except in those jurisdictions, the Company does not charge the customer or remit occupancy or other related taxes based on its margin or service fee, because the Company believes that such taxes are not owed on its compensation for its services (refer to Note 16). The tax recovery charge and occupancy and other related taxes collected from customers and remitted to those jurisdictions are reported on a net basis on the Consolidated Statement of Operations.

Advertising - Online — Online advertising expenses consist primarily of the costs of (1) search engine keyword purchases; (2) referrals from meta-search sites and travel research websites; (3) affiliate programs; (4) banner and pop-up advertisements; and (5) email campaigns. Online advertising expense is generally recognized as incurred. Included in "Accrued expenses and other current liabilities" on the Consolidated Balance Sheets are accrued online advertising liabilities of $99.6 million and $69.2 million at December 31, 2012 and 2011, respectively.

Advertising - Offline — Offline advertising expenses are comprised primarily of costs of domestic television, print, and radio advertising for priceline.com. The Company expenses the production costs of advertising the first time the advertising takes place.

Sales and Marketing — Sales and marketing expenses consist primarily of (1) credit card processing fees associated with merchant transactions; (2) fees paid to third-parties that provide call center, website content translations and other services; (3) provisions for credit card chargebacks; and (4) provisions for bad debt, primarily related to agency hotel commission receivables.

Personnel — Personnel expenses consist of compensation to the Company’s personnel, including salaries, bonuses, payroll taxes, employee health insurance and other benefits, and stock based compensation. Included in "Accrued expenses and other current liabilities" on the Consolidated Balance Sheets are accrued compensation liabilities of $97.9 million and $65.7 million at December 31, 2012 and 2011, respectively.

Stock-Based Compensation — The cost of stock-based transactions are recognized in the financial statements based upon fair value. The fair value of restricted stock, performance share units and restricted stock units is determined based on the number of units or shares, as applicable, granted and the quoted price of the Company’s common stock as of the grant date. Stock-based compensation related to performance share units reflects the estimated probable outcome at the end of the performance period. The fair value of stock options is determined as of the grant date using the Black-Scholes valuation model. Fair value is recognized as expense on a straight line basis, net of estimated forfeitures, over the employee requisite service period.

The fair value at grant date for restricted stock units with a market condition is estimated, based on the complexity of the award, using both closed-form models and lattice models. All compensation cost for an award that has a market condition is recognized as stock based compensation cost if the requisite service period is fulfilled, even if the market condition is never satisfied.

The benefits of tax deductions in excess of recognized compensation costs are reported as a credit to additional paid-in capital and as financing cash flows, but only when such excess tax benefits are realized by a reduction to current taxes payable. See Note 3 for further information on stock-based awards.

Information Technology — Information technology expenses are comprised primarily of outsourced data center costs, system maintenance and software license fees, data communications and other expenses associated with operating the Company’s Internet sites and payments to outside contractors. Such costs are expensed as incurred.

Income Taxes — The Company accounts for income taxes under the asset and liability method. The Company records the estimated future tax effects of temporary differences between the tax bases of assets and liabilities and amounts reported on the Consolidated Balance Sheets, as well as operating loss and tax credit carryforwards. Deferred taxes are classified as current or noncurrent based on the balance sheet classification of the related assets and liabilities.

The Company records deferred tax assets to the extent it believes these assets will more likely than not be realized. The Company regularly reviews its deferred tax assets for recoverability considering historical profitability, projected future taxable income, the expected timing of the reversals of existing temporary differences, the carryforward periods available for tax reporting purposes, and tax planning strategies. A valuation allowance is provided when it is more likely than not that some portion or all of a deferred tax asset will not be realized. The ultimate realization of deferred tax assets depends on the generation of future taxable income during the period in which related temporary differences become deductible. In determining the future tax consequences of events that have been recognized in the financial statements or tax returns, significant judgments, estimates, and interpretation of statutes are required.

Deferred taxes are measured using the enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred taxes of a change in tax rates is recognized in income in the period that includes the enactment date of such change.

Income taxes are not accrued for unremitted earnings of international operations that have been or are intended to be reinvested indefinitely.

The Company recognizes liabilities when it believes that uncertain positions may not be fully sustained upon review by the tax authorities. Liabilities recognized for uncertain tax positions are based on a two step approach for recognition and measurement. First, the Company evaluates the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not that the position will be sustained on audit based on its technical merits. Secondly, the Company measures the tax benefit as the largest amount which is more than 50% likely of being realized upon ultimate settlement. Interest and penalties attributable to uncertain tax positions, if any, are recognized as a component of income tax expense. See Note 15 for further details on income taxes.

Segment Reporting — The Company operates and manages its business as a single reportable unit. Operating segments that have similar economic characteristics are aggregated. For geographic related information, see Note 18 to the Company’s Consolidated Financial Statements.

Foreign Currency Translation — The functional currency of the Company’s foreign subsidiaries is generally their respective local currency. Assets and liabilities are translated into U.S. dollars at the rate of exchange existing at the balance sheet date. Income statement amounts are translated at average monthly exchange rates applicable for the period. Translation gains and losses are included as a component of "Accumulated other comprehensive loss" on the Company’s Consolidated Balance Sheets. Foreign currency transaction gains and losses are included in "Foreign currency transactions and other" in the Company’s Consolidated Statements of Operations.

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 flow 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 and British Pound Sterling, in which it conducts a significant portion of its business activities. As a result, the Company faces exposure to adverse movements in currency exchange rates as the financial results of its international 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 income.

The Company may enter into derivative instruments to hedge certain net exposures of nonfunctional currency denominated assets and liabilities and the volatility associated with translating foreign earnings into U.S. Dollars, 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 income in the period in which the change occurs and are recognized on the Consolidated Statements of Operations in "Foreign currency transactions and other." Cash flows related to these contracts are classified within "Net cash provided by operating activities" on the cash flow statement.

The Company also utilizes derivative instruments to hedge the impact of changes in currency exchange rates on the net assets of its foreign subsidiaries. These instruments are designated as net investment hedges. Hedge ineffectiveness is assessed and measured based on changes in forward exchange rates. The Company records gains and losses on these derivative instruments as currency translation adjustments, which offset a portion of the translation adjustments related to the foreign subsidiary’s net assets. Gains and losses are recognized on the Consolidated Balance Sheet in "Accumulated other comprehensive loss" and will be realized upon a partial sale or liquidation of the investment. The Company formally documents all derivatives designated as hedging instruments for accounting purposes, both at hedge inception and on an on-going basis. These net investment hedges expose the Company to liquidity risk as the derivatives have an immediate cash flow impact upon maturity, which is not offset by the translation of the underlying hedged equity. The cash flows from these contracts are classified within "Net cash used in investing activities" on the cash flow statement.

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 derivative instruments do not contain leverage features.

The Company is exposed to the risk that counterparties to derivative contracts may fail to meet their contractual obligations. The Company regularly reviews its credit exposure as well as assessing the creditworthiness of its counterparties. See Note 5 for further detail on derivatives.

Recent Accounting Pronouncements

On January 1, 2012, the Company adopted the amended accounting guidance issued by the Financial Accounting Standards Board ("FASB") concerning the presentation of comprehensive income. The new guidance requires comprehensive income to be reported in either a single statement or in two consecutive statements reporting net income and other comprehensive income. The Company selected to present two consecutive statements. This amended guidance did not change the items that constitute net income or other comprehensive income, the timing of when other comprehensive income is reclassified to net income, or the earnings per share computation. In February 2013, the FASB issued new accounting guidance which adds new disclosure requirements for items reclassified out of accumulated other comprehensive income. The new guidance requires that companies present either in a single note or parenthetically on the face of the financial statements, the effect of significant amounts reclassified based on its source and is effective for public companies in interim and annual reporting periods beginning after December 13, 2012. The Company will comply with the new disclosure requirements beginning in the first quarter of 2013.

In September 2011, the FASB issued an accounting update, which amended the guidance on testing goodwill for impairment. Under the revised guidance, entities testing goodwill for impairment have the option of performing a qualitative assessment before calculating the fair value of the reporting unit. If, based on the qualitative factors, it is more-likely-than not that the fair value of the reporting unit is less than its carrying value, then the unchanged two-step approach previously used would be required. The new accounting guidance did not change how goodwill is calculated, how goodwill is assigned to the reporting unit, or the requirements for testing goodwill annually or when events and circumstances warrant testing. The accounting update was effective for annual and interim periods beginning after December 15, 2011, with early adoption permitted. In September 2012, the Company performed its annual quantitative goodwill impairment testing, and concluded that the estimated fair value for each reporting unit substantially exceeds its respective carrying value.

In May 2010, the FASB issued amended guidance on fair value to largely achieve common fair value measurement and disclosure requirements between U.S. GAAP and IFRS. The new accounting guidance did not extend the use of fair value but rather provided guidance about how fair value should be determined. For U.S. GAAP, most of the changes were clarifications of existing guidance or wording changes to align with IFRS. The amended guidance expanded disclosure, particularly that relating to fair value measurements based on unobservable inputs, permitted fair value measurements for financial assets and liabilities on a net position if market or credit risks are managed on a net basis and other criteria are met, and allowed premiums and discounts only if a market participant would also include them in the fair value measurement. This accounting update was effective for public companies for interim or annual periods beginning after December 15, 2011, with early adoption permitted. The adoption of this accounting guidance, effective with the three months ended March 31, 2012, did not impact the Company's consolidated financial statements or disclosure.