Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Significant Accounting Policies [Line Items]
Impairment charges on minority investments		$ 7,432,000
Aggregate carrying investment amount	$ 10,687,000	10,687,000	$ 11,973,000
Goodwill impairment		$ 443,659,000	0	$ 0
Expected cash flow period in years		10 years
Finite lives impairment charge	93,520,000		0	0
Indefinite lives impairment charge		$ 0	0	0
Software development costs capitalized		0	0	250,000
Amortization expense of capitalized software costs		1,439,000	1,439,000	1,439,000
Net capitalized software costs	1,811,000	1,811,000	3,556,000	5,234,000
Advertising costs		$ 15,245,000	$ 8,799,000	$ 6,010,000
Foreign Concentration Risk [Member] | Consolidated Revenue [Member]
Significant Accounting Policies [Line Items]
Revenue percentage		49.00%
Minimum [Member]
Significant Accounting Policies [Line Items]
Sale payment period		30 days
Ownership of companies, percent		20.00%
Terminal year growth rate		4.90%
Fair value discount rate		12.75%
Maximum [Member]
Significant Accounting Policies [Line Items]
Warranty period		1 year
Sale payment period		60 days
Ownership of companies, percent		50.00%
Terminal year growth rate		5.30%
Fair value discount rate		13.50%
Americas [Member]
Significant Accounting Policies [Line Items]
Fair value of goodwill	0	$ 0
Goodwill impairment		$ 382,271,000
Finite lives impairment charge	$ 92,248,000
EMEA [Member]
Significant Accounting Policies [Line Items]
Carrying value of goodwill exceeds fair value, percent	29.00%	29.00%
Goodwill impairment		$ 61,388,000
Finite lives impairment charge	$ 1,272,000