Schedule II - Valuation And Qualifying Accounts And Reserves (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance For Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 924	$ 1,195	$ 3,348
Additions, Charged to Costs and Expenses	0	0	0
Additions, Charged to Other Accounts	0	0	0
(Deductions)	(119)	(271)	(2,153)
Balance at End of Year	805	924	1,195
Deferred Income Tax Valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	8,585	9,008	6,217
Additions, Charged to Costs and Expenses	(1,706)	(423)	1,443
Additions, Charged to Other Accounts	0	0	1,348
(Deductions)	0	0	0
Balance at End of Year	$ 6,879	$ 8,585	$ 9,008