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Business Combinations, Goodwill and Intangible Assets (Summary of Preliminary Purchase Price Allocation for Acquisition) (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Feb. 12, 2016
Dec. 31, 2015
Dec. 31, 2014
Business Acquisition [Line Items]        
Goodwill $ 91,379   $ 86,545 $ 68,829
Chile [Member]        
Business Acquisition [Line Items]        
Goodwill 17,380   16,438 19,101
Mexico [Member]        
Business Acquisition [Line Items]        
Goodwill $ 34,289   $ 33,834 $ 15,719
Monits S.A. [Member]        
Business Acquisition [Line Items]        
Cash and cash equivalents   $ 3    
Other net tangible assets   25    
Total net tangible assets   28    
Intangible assets   196    
Goodwill   2,832    
Aggregate price paid   $ 3,056