Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Significant Accounting Policies [Line Items]
Impairment charges on minority investments		$ 1	$ 7,432
Aggregate carrying investment amount	$ 10,687	9,116	10,687
Goodwill impairment		0	443,659	$ 0
Finite lives impairment charge	$ 93,520	0	93,520	0
Advertising costs		$ 12,469	15,245	$ 8,799
Minimum [Member]
Significant Accounting Policies [Line Items]
Sale payment period		30 days
Ownership of companies, percent		20.00%
Maximum [Member]
Significant Accounting Policies [Line Items]
Warranty period		1 year
Sale payment period		60 days
Ownership of companies, percent		50.00%
Americas [Member]
Significant Accounting Policies [Line Items]
Fair value of goodwill		$ 0
Goodwill impairment		$ 382,271	382,271
Finite lives impairment charge			92,248
Other EMEA [Member]
Significant Accounting Policies [Line Items]
Carrying value of goodwill exceeds fair value, percent		29.00%
Goodwill impairment		$ 61,388	61,388
Finite lives impairment charge			$ 1,272