Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets [Abstract]
Goodwill		$ 14,916	$ 14,916
Estimated useful lives customer relationship		5 years
Amortization of intangible assets	$ 1,100		2,300
Annual amortization expense		$ 2,300
Asset impairment charges		0
Indefinite-lived Intangible Assets [Line Items]
Cost		11,286	11,286
Accumulated Amortization		10,157	7,900
Other Intangible Assets [Member]
Indefinite-lived Intangible Assets [Line Items]
Cost		11,286	11,286
Accumulated Amortization		$ 10,157	$ 7,900