Basis of Presentation	3 Months Ended
Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP), and applicable Securities and Exchange Commission, or SEC, rules and regulations regarding interim financial reporting. Certain information and note disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2015, or 2015 Form 10-K. The condensed consolidated balance sheet as of December 31, 2015 included herein was derived from the audited financial statements as of that date, but does not include all disclosures including notes required by U.S. GAAP. The accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, and cash flows for the interim periods, but are not necessarily indicative of the anticipated results of operations for the entire year ending December 31, 2016 or any future period. Basis of Consolidation The condensed consolidated financial statements include our accounts and those of our wholly and indirectly owned subsidiaries. We eliminate all intercompany balances and transactions, including intercompany profits, in consolidation. Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires us to make certain estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We continually evaluate our estimates, including those related to the allocation of the purchase price associated with acquisitions; the carrying value of long-lived assets; the amortization period of long-lived assets; the carrying value, capitalization, and amortization of software and website development costs; the carrying value of goodwill and other intangible assets; the amortization period of intangible assets; the provision for income taxes and related deferred tax accounts, and realizability of deferred tax assets; certain accrued expenses; contingencies, litigation, and related legal accruals; and the value attributed to employee stock options and other stock-based awards. We base our estimates on historical experience, current business factors, and various other assumptions that we believe are necessary to consider to form a basis for making judgments. Actual results could be materially different from these estimates.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP), and applicable Securities and Exchange Commission, or SEC, rules and regulations regarding interim financial reporting. Certain information and note disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2015, or 2015 Form 10-K.

The condensed consolidated balance sheet as of December 31, 2015 included herein was derived from the audited financial statements as of that date, but does not include all disclosures including notes required by U.S. GAAP.

The accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, and cash flows for the interim periods, but are not necessarily indicative of the anticipated results of operations for the entire year ending December 31, 2016 or any future period.

Basis of Consolidation

The condensed consolidated financial statements include our accounts and those of our wholly and indirectly owned subsidiaries. We eliminate all intercompany balances and transactions, including intercompany profits, in consolidation.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires us to make certain estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We continually evaluate our estimates, including those related to the allocation of the purchase price associated with acquisitions; the carrying value of long-lived assets; the amortization period of long-lived assets; the carrying value, capitalization, and amortization of software and website development costs; the carrying value of goodwill and other intangible assets; the amortization period of intangible assets; the provision for income taxes and related deferred tax accounts, and realizability of deferred tax assets; certain accrued expenses; contingencies, litigation, and related legal accruals; and the value attributed to employee stock options and other stock-based awards. We base our estimates on historical experience, current business factors, and various other assumptions that we believe are necessary to consider to form a basis for making judgments. Actual results could be materially different from these estimates.