Other Non-Operating Income (Expense) (Details 1) - USD ($) $ in Thousands	3 Months Ended									12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Nonoperating Income (Expense) [Abstract]
Loss on guarantor obligations										$ (17,518)	$ 0	$ 0
Net gain on cost method investments	$ 3,200	$ 8,500								11,663	0	0
Net gain (loss) on sales of businesses										8,157	(569)	18,931
Foreign currency (loss) gain, net										(3,844)	3,310	(39,890)
Gain on sale of cost method investments										2,845	16	794
Impairment of cost method investments										(2,697)
Impairment of cost method investment											(200)	(29,365)
Net gain on sale of property, plant and equipment									$ 34,100	2,539	0	34,072
Gain on formation of a joint venture										0	0	3,232
Net losses on sales or write-down of marketable equity securities										0	0	(1,791)
Other, net										958	1,684	1,375
Other income (expense), net	$ (12,559)	$ 3,142	$ 2,333	$ 9,187	$ (2,640)	$ 1,963	$ 4,069	$ 849		$ 2,103	$ 4,241	$ (12,642)