Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross	$ 3,458	$ 3,458
Less accumulated amortization	178	0
Intangible assets subject to amortization, net	3,280	3,458
Trade names
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross	3,410	3,410
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross	$ 48	$ 48