Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for doubtful accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 27,035	$ 13,760	$ 11,555
Charges to Earnings	12,191	11,513	11,176
Charges to Other Accounts	(2,554)	10,309	440
Deductions	(11,394)	(8,547)	(9,411)
Balance of End of Period	25,278	27,035	13,760
Other reserves
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	29,959	25,258	15,891
Balance of End of Period	$ 24,493	$ 29,959	$ 25,258