Acquisitions (Details) (USD $)			9 Months Ended		9 Months Ended		9 Months Ended		9 Months Ended		9 Months Ended		9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 HiFX and HiFM [Member]	May 20, 2014 HiFX and HiFM [Member]	Sep. 30, 2014 Software Development [Member]	May 20, 2014 Software Development [Member]	Sep. 30, 2014 Customer-Related Intangible Assets [Member]	May 20, 2014 Customer-Related Intangible Assets [Member]	Sep. 30, 2014 Trade Names [Member]	May 20, 2014 Trade Names [Member]	Sep. 30, 2014 Noncompete Agreements [Member]	May 20, 2014 Noncompete Agreements [Member]	Sep. 30, 2014 United Kingdom, Pounds HiFX and HiFM [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross			$ 188,000,000										$ 111,800,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares			1,262,654
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable			56,600,000
Business Combination, Consideration Transferred, Amount Placed In Escrow			16,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents				103,319,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Derivative Assets				26,597,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets				2,902,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				102,841,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets				627,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				236,286,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable				(1,253,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other				(7,037,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Derivative Liabilities				(18,187,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Settlement Obligations and Customer Deposits				(97,781,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent				(23,524,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities				(677,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				(148,459,000)
Goodwill	619,285,000	498,435,000		156,748,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net				244,575,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets						$ 61,704,000		$ 26,764,000		$ 12,247,000		$ 2,126,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					10 years		8 years		20 years		3 years