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Other Current Assets	12 Months Ended
Other Current Assets	Dec. 31, 2012
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Other Current Assets	Other Current Assets The Company reports accounts receivable related to the current portion of annual lease licenses and software maintenance that has not yet been recognized as revenue as components of other receivables and current assets. The amounts reported in other receivables and current assets totaled $149.3 million and $112.8 million as of December 31, 2012 and December 31, 2011, respectively. The Company reports income taxes receivable, including amounts related to overpayments and refunds, as a component of other receivables and current assets. These amounts totaled $48.9 million and $36.0 million as of December 31, 2012 and December 31, 2011, respectively.