Summary of Accrued Expenses and Other Current Liabilities Footnote (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013 item	Dec. 31, 2012 item
Accrued Expenses And Other Current Liabilities [Abstract]
Entrusted Loan Receivable		$ 7.9
Individual Items Accounting For More Than Five Percent Of Balance Of Accrued Expenses	0	0
Percent Of Decision Point On Reporting Individual Items In Accrued Expenses	5.00%	5.00%