Goodwill and Intangible Asset (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Goodwill and Intangible Assets [Abstract]
Goodwill	$ 14,916		$ 14,916		$ 14,916
Estimated useful lives customer relationship			5 years
Amortization of intangible assets	600	$ 600	$ 1,100	$ 1,100
Annual amortization expense			2,300
Asset impairment charges			0
Finite-Lived Intangible Assets [Line Items]
Cost	11,286		11,286		11,286
Accumulated Amortization	9,029		9,029		7,900
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	11,286		11,286		11,286
Accumulated Amortization	$ 9,029		$ 9,029		$ 7,900