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Geographic Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Geographic information [Line Items]      
Revenues $ 457,641 $ 282,647 $ 121,301
Identifiable assets 980,450 1,233,661 225,109
U.S. [Member]      
Geographic information [Line Items]      
Revenues 411,028 228,044 73,388
Identifiable assets 920,851 1,172,537 176,638
Latin America [Member]      
Geographic information [Line Items]      
Revenues 36,843 40,372 34,556
Identifiable assets 54,362 51,036 38,426
Canada [Member]      
Geographic information [Line Items]      
Revenues 4,282 6,860 5,549
Identifiable assets 2,307 5,915 6,650
Other [Member]      
Geographic information [Line Items]      
Revenues 5,488 7,371 7,808
Identifiable assets $ 2,930 $ 4,173 $ 3,395