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Schedule of Acquisition Purchase Price Allocation (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Jan. 29, 2016
Business Acquisition [Line Items]      
Goodwill $ 105,655 $ 105,655  
Initial Montana Acquisition [Member]      
Business Acquisition [Line Items]      
Cash and cash equivalents     $ 1,700
Property and equivalents     2,350
Intangible assets     14,400
Goodwill     1,680
Total acquired assets     $ 20,130