Acquisitions - Purchase Price Allocation of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified					12 Months Ended			12 Months Ended			12 Months Ended					12 Months Ended									12 Months Ended			12 Months Ended								12 Months Ended
	Dec. 31, 2013 All 2013 Acquisitions [Member]	Dec. 31, 2012 All 2012 Acquisitions [Member]	Dec. 31, 2011 Allstar Business Solutions Limited [Member]	Dec. 31, 2013 Customer Relationships [Member] All 2013 Acquisitions [Member]	Dec. 31, 2013 Customer Relationships [Member] All 2013 Acquisitions [Member] Minimum [Member]	Dec. 31, 2013 Customer Relationships [Member] All 2013 Acquisitions [Member] Maximum [Member]	Dec. 31, 2012 Customer Relationships [Member] All 2012 Acquisitions [Member]	Dec. 31, 2012 Customer Relationships [Member] All 2012 Acquisitions [Member] Minimum [Member]	Dec. 31, 2012 Customer Relationships [Member] All 2012 Acquisitions [Member] Maximum [Member]	Dec. 31, 2011 Customer Relationships [Member] Allstar Business Solutions Limited [Member]	Dec. 31, 2011 Customer Relationships [Member] Allstar Business Solutions Limited [Member] Minimum [Member]	Dec. 31, 2011 Customer Relationships [Member] Allstar Business Solutions Limited [Member] Maximum [Member]	Dec. 31, 2013 Trade Names and Trademarks-Indefinite [Member] All 2013 Acquisitions [Member]	Dec. 31, 2012 Trade Names and Trademarks-Indefinite [Member] All 2012 Acquisitions [Member]	Dec. 31, 2011 Trade Names and Trademarks-Indefinite [Member] Allstar Business Solutions Limited [Member]	Dec. 31, 2013 Trade Names and Trademarks-Indefinite [Member] All 2013 Acquisitions [Member]	Dec. 31, 2013 Merchant Network [Member] All 2013 Acquisitions [Member]	Dec. 31, 2012 Merchant Network [Member] All 2012 Acquisitions [Member]	Dec. 31, 2011 Merchant Network [Member] Allstar Business Solutions Limited [Member]	Dec. 31, 2013 Software [Member] Minimum [Member]	Dec. 31, 2012 Software [Member] Minimum [Member]	Dec. 31, 2013 Software [Member] Maximum [Member]	Dec. 31, 2012 Software [Member] Maximum [Member]	Dec. 31, 2013 Software [Member] All 2013 Acquisitions [Member]	Dec. 31, 2013 Software [Member] All 2013 Acquisitions [Member] Minimum [Member]	Dec. 31, 2013 Software [Member] All 2013 Acquisitions [Member] Maximum [Member]	Dec. 31, 2012 Software [Member] All 2012 Acquisitions [Member]	Dec. 31, 2012 Software [Member] All 2012 Acquisitions [Member] Minimum [Member]	Dec. 31, 2012 Software [Member] All 2012 Acquisitions [Member] Maximum [Member]	Dec. 31, 2013 Non-compete [Member] Minimum [Member]	Dec. 31, 2012 Non-compete [Member] Minimum [Member]	Dec. 31, 2013 Non-compete [Member] Maximum [Member]	Dec. 31, 2012 Non-compete [Member] Maximum [Member]	Dec. 31, 2013 Non-compete [Member] All 2013 Acquisitions [Member]	Dec. 31, 2012 Non-compete [Member] All 2012 Acquisitions [Member]	Dec. 31, 2012 Non-compete [Member] All 2012 Acquisitions [Member] Minimum [Member]	Dec. 31, 2012 Non-compete [Member] All 2012 Acquisitions [Member] Maximum [Member]
Business Acquisition [Line Items]
Weighted Average Useful Lives (in Years)					3 years	20 years		10 years	20 years		10 years	20 years				15 years	10 years	10 years	20 years	3 years	3 years	10 years	10 years		3 years	10 years		3 years	10 years	2 years	2 years	6 years	6 years	5 years		2 years	6 years
Intangible assets	$ 470,342	$ 109,782	$ 168,200	$ 366,072			$ 77,678			$ 141,600			$ 46,900	$ 16,900	$ 18,400	$ 200	$ 5,280	$ 4,604	$ 8,200					$ 36,890			$ 9,800							$ 15,000	$ 800