Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 34,479	$ 16,381	$ 13,619
Charged to Cost and Expense	3,875	10,341	7,700
Reductions	(9,326)	(3,706)	(4,570)
Other	(559)	11,463	(368)
Balance at End of Year	28,469	34,479	16,381
Deferred Tax Valuation Allowance [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	238,236	289,237	170,958
Additions	26,162	0	118,279
Reductions	0	(51,001)	0
Other	0	0	0
Balance at End of Year	264,398	238,236	289,237
LIFO Reserve [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	17,571	20,245	20,179
Charged to Cost and Expense	3,474	1,708	686
Reductions	(1,025)	(4,382)	(620)
Other	0	0	0
Balance at End of Year	$ 20,020	$ 17,571	$ 20,245