Goodwill and Intangible Assets Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 12,189	$ 12,189
Finite-Lived Intangible Assets, Accumulated Amortization	(3,622)	(3,048)
Finite-Lived Intangible Assets, Net	8,567	9,141
Indefinite-lived Intangible Assets Acquired	1,185	1,185
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	10,284	10,284
Finite-Lived Intangible Assets, Accumulated Amortization	(3,298)	(2,784)
Finite-Lived Intangible Assets, Net	$ 6,986	$ 7,500
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years 5 months	3 years 8 months
Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 720	$ 720
Finite-Lived Intangible Assets, Accumulated Amortization	(324)	(264)
Finite-Lived Intangible Assets, Net	$ 396	$ 456
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	1 year 9 months	2 years 1 month