Fair Value Measurements	9 Months Ended
Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Company applies fair value accounting for all assets and liabilities that are recognized or disclosed at fair value in its consolidated financial statements on a recurring basis. Fair value represents the amount that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities, the Company considers the principal or most advantageous market and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability. The fair values of cash equivalents, trade accounts receivable, settlement assets and obligations, accounts payable, and client deposits approximate their respective carrying values due to the short period of time to maturity. The estimated fair value of total debt was $5.2 billion at September 30, 2017 and $4.7 billion at December 31, 2016, and was based on quoted prices in active markets for the Company’s senior notes (level 1 of the fair value hierarchy) and discounted cash flows based on the Company’s current incremental borrowing rate for its term loan (level 3 of the fair value hierarchy). The fair value of the Company’s revolving credit facility borrowings approximates carrying value as the underlying interest rate is variable based on LIBOR. The estimated fair value of the contingent consideration liability of $15 million at September 30, 2017 (see Note 4) was based on the present value of a probability-weighted assessment approach derived from the likelihood of achieving the various earn-out criteria (level 3 of the fair value hierarchy) and is reported in other long-term liabilities in the consolidated balance sheet. This estimated fair value has not changed since the acquisition date.

Fair Value Measurements

The Company applies fair value accounting for all assets and liabilities that are recognized or disclosed at fair value in its consolidated financial statements on a recurring basis. Fair value represents the amount that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities, the Company considers the principal or most advantageous market and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability.

The fair values of cash equivalents, trade accounts receivable, settlement assets and obligations, accounts payable, and client deposits approximate their respective carrying values due to the short period of time to maturity. The estimated fair value of total debt was $5.2 billion at September 30, 2017 and $4.7 billion at December 31, 2016, and was based on quoted prices in active markets for the Company’s senior notes (level 1 of the fair value hierarchy) and discounted cash flows based on the Company’s current incremental borrowing rate for its term loan (level 3 of the fair value hierarchy). The fair value of the Company’s revolving credit facility borrowings approximates carrying value as the underlying interest rate is variable based on LIBOR. The estimated fair value of the contingent consideration liability of $15 million at September 30, 2017 (see Note 4) was based on the present value of a probability-weighted assessment approach derived from the likelihood of achieving the various earn-out criteria (level 3 of the fair value hierarchy) and is reported in other long-term liabilities in the consolidated balance sheet. This estimated fair value has not changed since the acquisition date.