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