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Client Funds/Obligations	12 Months Ended
Client Funds/Obligations	Dec. 31, 2013
Restricted Cash and Investments, Current [Abstract]
Client Funds/Obligations	Client Funds/Obligations The Company had $316.3 million and $398.9 million of funds held on behalf of clients at December 31, 2013 and 2012, respectively. There were no fixed-income marketable securities included within the funds held on behalf of client at December 31, 2013. The December 31, 2012 balance includes $11.8 million of fixed-income marketable securities which have been classified as available-for-sale investments. There were no significant unrealized gains or losses associated with these fixed-income securities at December 31, 2013 and 2012. During the years ended December 31, 2013, 2012 and 2011, the Company received $20.2 million, $145.3 million and $107.1 million, respectively, of proceeds from the sales/maturities of investments in available-for-sale securities held to satisfy client funds obligations. Gross realized gains and losses associated with the sales/maturities of these available-for-sale securities held to satisfy client funds obligations were not significant during the years ended December 31, 2013, 2012 and 2011.