Schedule of Acquisition Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Apr. 22, 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
Second Montana Acquisition [Member]
Business Acquisition [Line Items]
Cash and other current assets			$ 404
Property and equivalents			7,839
Intangible assets			11,400
Goodwill			6,013
Total acquired assets			$ 25,656