Provision For Income Taxes (Gross Operating Loss Carryforwards And Domestic Tax Credit Carryforwards) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 1,011
Expiration date for operating loss carryforwards	2029
State [Member]
Operating Loss Carryforwards [Line Items]
State tax credits	1,355
Operating loss carryforwards	31,312	[1]
Expiration date for tax credit carryforward	2027
Expiration date for operating loss carryforwards	2020
Expiration percentage of operating loss carryforwards	84.00%
Foreign [Member]
Operating Loss Carryforwards [Line Items]
Foreign tax credits	3,317
Operating loss carryforwards	$ 187
Maximum [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Expiration date for operating loss carryforwards	2030	[1]
Maximum [Member] | Foreign [Member]
Operating Loss Carryforwards [Line Items]
Expiration date for tax credit carryforward	2017
Expiration date for operating loss carryforwards	None
Minimum [Member] | State [Member]
Operating Loss Carryforwards [Line Items]
Expiration date for operating loss carryforwards	2015	[1]
Minimum [Member] | Foreign [Member]
Operating Loss Carryforwards [Line Items]
Expiration date for tax credit carryforward	2016
Expiration date for operating loss carryforwards	2015

[1] Of the total state operating loss-carryforwards, approximately 84% expire in 2020 or later.