Cash Equivalents And Restricted Cash And Securities (Summary Of Cash Equivalents And Marketable Securities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Cash [Member] | Restricted Cash And Securities [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cost Basis	$ 5,000	$ 5,000
Estimated Market Value	5,000	5,000
Money Market Funds [Member] | Cash Equivalents [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cost Basis	5,349	1,319
Estimated Market Value	5,349	1,319
Money Market Funds [Member] | Restricted Cash And Securities [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cost Basis	350	323
Estimated Market Value	350	323
Certificates Of Deposit [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Cost Basis	749
Estimated Market Value	$ 749