Schedule II Valuation and Qualifying Accounts (Table) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances And Reserves, Balance At Beginning Of Period	$ 3,092	$ 8,321	$ 7,767
Valuation Allowances And Reserves, Charged To Cost And Expense	(1,265)	338	1,484
Valuation Allowances And Reserves, Deductions	(449)	(5,567)	(930)
Valuation Allowances And Reserves, Balance At End Of Period	$ 1,378	$ 3,092	$ 8,321