Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance, Beginning Balance	$ 22,076	$ 31,030	$ 28,715
Valuation Allowances and Reserves, Charged to Cost and Expense	14,341	6,299	7,587
Valuation Allowances and Reserves, Deductions	4,795	10,639	7,763
Valuation Allowances and Reserves, Reclassifications to Assets Held for Sale	3,380	4,614	(2,491)
Valuation Allowances and Reserves, Balance, Ending Balance	$ 28,242	$ 22,076	$ 31,030