Schedule II - Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Valuation and Qualifying Accounts [Abstract]
Balance at Beginning of Period	$ 7,282	$ 7,277	$ 6,800
Charged to Costs and Expenses	1,074	2,123	3,200
Deductions	2,046	2,118	2,723
Balance at End of Period	$ 6,310	$ 7,282	$ 7,277