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Business Combinations, Goodwill and Intangible Assets (Table Showing Changes in Carrying Amount of Goodwill) (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Goodwill [Line Items]    
Balance, beginning of the period $ 68,829 $ 55,101
Business Acquisition 37,044 23,923
Effect of exchange rates changes (4,033) (10,195)
Balance, end of the period 101,840 68,829
Brazil [Member]    
Goodwill [Line Items]    
Balance, beginning of the period 10,557 10,366
Business Acquisition 14,066 1,538
Effect of exchange rates changes (819) (1,347)
Balance, end of the period 23,804 10,557
Argentina [Member]    
Goodwill [Line Items]    
Balance, beginning of the period 11,859 14,676
Business Acquisition   775
Effect of exchange rates changes (614) (3,592)
Balance, end of the period 11,245 11,859
Chile [Member]    
Goodwill [Line Items]    
Balance, beginning of the period 19,101 6,520
Business Acquisition   14,710
Effect of exchange rates changes (924) (2,129)
Balance, end of the period 18,177 19,101
Mexico [Member]    
Goodwill [Line Items]    
Balance, beginning of the period 15,719 11,376
Business Acquisition 22,978 6,293
Effect of exchange rates changes (1,268) (1,950)
Balance, end of the period 37,429 15,719
Venezuela [Member]    
Goodwill [Line Items]    
Balance, beginning of the period $ 5,729 5,252
Business Acquisition   477
Effect of exchange rates changes    
Balance, end of the period $ 5,729 5,729
Colombia [Member]    
Goodwill [Line Items]    
Balance, beginning of the period 4,521 5,506
Business Acquisition   82
Effect of exchange rates changes (324) (1,067)
Balance, end of the period 4,197 4,521
Other Countries [Member]    
Goodwill [Line Items]    
Balance, beginning of the period 1,343 1,405
Business Acquisition   48
Effect of exchange rates changes (84) (110)
Balance, end of the period $ 1,259 $ 1,343