Income Taxes (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
U.S. federal statutory income tax rate	35.00%	35.00%
change in valuation allowance during the year	$ 4,625
Unrecognized tax benefits	2,273	2,609
Unrecognized tax benefits that would impact effective tax rate	163	288
Accrued penalties and interest	7	20
Open Tax Year	1998
Federal [Member]
Operating Loss Carryforwards	553,542
Operating loss carryforward, tax effected, benefit to be recognized in additional paid-in capital	2,643
Operating Loss Carryforwards, Expiration Dates	from 2018 through 2032
Tax credit carryforward	5,413
Tax credit carryforward expiration date range	from 2018 through 2031
State [Member]
Operating Loss Carryforwards	98,895
Operating loss carryforward, tax effected, benefit to be recognized in additional paid-in capital	1,906
Operating Loss Carryforwards, Expiration Dates	from 2012 to 2032
Tax credit carryforward	$ 5,076
Tax credit carryforward expiration date range	indefinitely