Income Taxes (Components of Income Tax Provision (Benefit)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
Federal	$ 0	$ 0	$ 0
State, local and foreign	749	129	213
Current Income Tax Expense (Benefit)	749	129	213
Deferred:
Federal	0	0	0
State, local and foreign	0	0	0
Deferred Income Tax Expense (Benefit)	0	0	0
Income tax provision	$ 749	$ 129	$ 213