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Business Combinations, Goodwill and Intangible Assets (Summary of Preliminary Purchase Price Allocation for Acquisition) (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Apr. 22, 2015
Apr. 01, 2015
Dec. 31, 2014
Dec. 31, 2013
Business Acquisition [Line Items]          
Goodwill $ 101,840     $ 68,829 $ 55,101
Argentina [Member]          
Business Acquisition [Line Items]          
Goodwill 11,245     11,859 14,676
Brazil [Member]          
Business Acquisition [Line Items]          
Goodwill 23,804     10,557 10,366
Chile [Member]          
Business Acquisition [Line Items]          
Goodwill 18,177     19,101 6,520
Mexico [Member]          
Business Acquisition [Line Items]          
Goodwill $ 37,429     $ 15,719 $ 11,376
Metros Cubicos, S.A. de C.V. [Member]          
Business Acquisition [Line Items]          
Cash and cash equivalents   $ 593      
Other net tangible assets / (liabilities)   241      
Intangible assets   8,721      
Deferred tax assets and liabilities   (2,616)      
Goodwill   22,978      
Aggregate price paid   29,917      
Metros Cubicos, S.A. de C.V. [Member] | Customer Lists [Member]          
Business Acquisition [Line Items]          
Intangible assets   3,924      
Metros Cubicos, S.A. de C.V. [Member] | Non Solicitation Agreements [Member]          
Business Acquisition [Line Items]          
Intangible assets   229      
KPL Soluções Ltda [Member]          
Business Acquisition [Line Items]          
Cash and cash equivalents     $ 159    
Other net tangible assets / (liabilities)     27    
Intangible assets     8,433    
Goodwill     14,066    
Aggregate price paid     22,685    
KPL Soluções Ltda [Member] | Customer Lists [Member]          
Business Acquisition [Line Items]          
Intangible assets     3,137    
KPL Soluções Ltda [Member] | Software [Member]          
Business Acquisition [Line Items]          
Intangible assets     4,791    
KPL Soluções Ltda [Member] | Non Solicitation Agreements [Member]          
Business Acquisition [Line Items]          
Intangible assets     $ 505    
Trademarks [Member] | Metros Cubicos, S.A. de C.V. [Member]          
Business Acquisition [Line Items]          
Intangible assets   $ 4,568