Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Nature of Operations and Summary of Significant Accounting Policies (Narrative) (Details)

v3.8.0.1
Nature of Operations and Summary of Significant Accounting Policies (Narrative) (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2017
USD ($)
item
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Accounting Policies [Abstract]          
Number of operating segments | item     1    
Accounts Receivable and Net investment in sales-type leases          
Allowance for doubtful accounts receivable     $ 1,160 $ 843  
Allowance for doubtful accounts due to investment in sales-type leases     1,575 844  
Inventories          
Inventory write-downs for obsolescence and excess inventories     6,300 7,700  
Property, Plant and Equipment          
Impairment charges $ 792,000 $ 150,400      
Goodwill          
Goodwill impairment     $ 942,408
Other Intangible Assets          
Impairment of Intangible Assets (Excluding Goodwill)     2,200 16,900 260,300
Advertising costs     $ 14,200 19,400 $ 23,500
Research and Development Costs          
Maximum additional tax rate on distribution of dividends     10.00%    
Settlement percentage     50.00%    
Vesting period     4 years    
Stock-Based Compensation          
Expected dividend rate (as a percent)     0.00%    
Business Combinations          
Maximum measurement period of revision of consideration transferred     1 year    
Net operating losses       $ 5,000