General	12 Months Ended
Dec. 31, 2011
General [Abstract]
General	1. General CSG Systems International, Inc. (the "Company", "CSG", or forms of the pronoun "we"), a Delaware corporation, was formed in October 1994 and is based in Englewood, Colorado. We are a business support solutions provider primarily serving the communications industry. Our broad suite of solutions helps our clients improve their business operations by creating more compelling product offerings and an enhanced customer experience through more relevant and targeted interactions, while at the same time, more efficiently managing the service provider's cost structure. Over the years, we have focused our research and development ("R&D") and acquisition investments on expanding our solution set to address the expanding needs of communications service providers to provide a differentiated, real-time, and personal experience for their consumers. Our suite of solutions includes revenue management, content management and monetization, customer interaction management, as well as analytics and intelligence. We are a S&P SmallCap 600 company. The accompanying Consolidated Financial Statements ("Financial Statements") are prepared in conformity with accounting principles generally accepted in the United States ("U.S.").

General

12 Months Ended

Dec. 31, 2011

1. General

CSG Systems International, Inc. (the "Company", "CSG", or forms of the pronoun "we"), a Delaware corporation, was formed in October 1994 and is based in Englewood, Colorado. We are a business support solutions provider primarily serving the communications industry. Our broad suite of solutions helps our clients improve their business operations by creating more compelling product offerings and an enhanced customer experience through more relevant and targeted interactions, while at the same time, more efficiently managing the service provider's cost structure. Over the years, we have focused our research and development ("R&D") and acquisition investments on expanding our solution set to address the expanding needs of communications service providers to provide a differentiated, real-time, and personal experience for their consumers. Our suite of solutions includes revenue management, content management and monetization, customer interaction management, as well as analytics and intelligence. We are a S&P SmallCap 600 company.

The accompanying Consolidated Financial Statements ("Financial Statements") are prepared in conformity with accounting principles generally accepted in the United States ("U.S.").