Acquisitions (Schedule of intangible assets acquired) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended	0 Months Ended		12 Months Ended	0 Months Ended	12 Months Ended	0 Months Ended
	Dec. 31, 2013	Aug. 07, 2013 Cardpoint Limited [Member]	Aug. 07, 2013 Customer Contracts [Member] Cardpoint Limited [Member]	Dec. 31, 2013 Trade Name [Member]	Aug. 07, 2013 Trade Name [Member] Cardpoint Limited [Member]	Dec. 31, 2013 Non-Compete Agreements [Member]	Aug. 07, 2013 Non-Compete Agreements [Member] Cardpoint Limited [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, fair values	$ 76,803	$ 59,673	$ 50,291	$ 9,867	$ 9,096	$ 1,284	$ 286
Acquired intangible assets, useful Lives			7 years	14 years 9 months 18 days	15 years	2 years 6 months	1 year
Acquired intangible assets, weighted average period before next renewal			3 years 10 months 24 days