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Commitments and Contingencies (Details 3) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013 Letter of Credit	Dec. 31, 2012 Letter of Credit	Dec. 31, 2013 Letter of Credit Expired and Retained by Landlord	Jun. 30, 2013 Letter of Credit Expired and Retained by Landlord
Letters of Credit
Letters of Credit	$ 0	$ 4.9
Letters of Credit			0.3	3.9
Cash collateral returned to the Company in connection with the expiration of lease			0.7
Cash collateral held by the Company's landlord	$ 0.3

The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for letter of credit arrangements, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party.

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