Acquisitions (Summary of Preliminary Estimated Fair Values of Assets Acquired and Liabilities Assumed) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Aug. 07, 2013 Cardpoint Limited [Member]
Business Acquisitions [Line Items]
Cash and cash equivalents				$ 4,782
Accounts and notes receivable				619
Inventory				863
Restricted cash				7,522
Prepaid expenses, deferred costs, and other current assets				6,665
Property and equipment				28,548
Deferred tax assets				22,117
Intangible assets				59,673
Goodwill	404,491	285,696	271,562	90,913
Total assets acquired				221,702
Accounts payable				6,052
Accrued liabilities				24,393
Deferred revenue				56
Asset retirement obligations				16,521
Deferred tax liabilities				12,852
Total liabilities assumed				59,874
Net assets acquired				$ 161,828