SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) (Receivable Reserves, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Receivable Reserves
Movement in Valuation Allowances and Reserves
Balance at beginning of period	$ 10,372	$ 11,113	$ 14,946
Charged to cost and expenses	3,644	1,407	(347)
Additions (Deductions)	(2,006)	(2,148)	(3,486)
Balance at end of period	$ 12,010	$ 10,372	$ 11,113