Income Taxes Uncertain tax positions (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Valuation Allowance	$ 1,764	$ 327,449
Unrecognized tax benefits	525	1,586	6,330
Additions - current year tax positions	70	75	65
Additions - prior year tax positions	0	0	0
Reductions - prior year tax positions	(183)	(1,136)	(4,809)
Unrecognized tax benefits	412	525	1,586
Accrued Interest And Penalties, Net of Tax	100	103	140
Unrecognized tax benefits, net of accrued interest and penalties	512	628	1,726
Unrecognized tax benefits that would impact effective tax rate	$ 386