Significant Components of Contract Acquisition Costs, Net of Accumulated Amortization (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Conversion costs, net of accumulated amortization of $118.7 million and $105.4 million at 2013 and 2012, respectively	$ 102,177	$ 85,402
Payments for processing rights, net of accumulated amortization of $120.3 million and $110.6 million at 2013 and 2012, respectively	71,663	75,865
Total	$ 173,840	$ 161,267

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

Name:	us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant