SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) (Allowance for Doubtful Accounts [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 7,204		$ 6,202		$ 3,540
Charged to Cost and Expenses	2,018		1,283		3,101
Charged to Other Accounts	560		454		193
Deductions	(984)	[1]	(735)	[1]	(632)	[1]
Balance At End of Year	$ 8,798		$ 7,204		$ 6,202

[1] Uncollectible accounts written off, net of recoveries.