Goodwill and Other Intangible Assets - Summary of Intangible Assets, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 14,058	$ 14,058
Accumulated Amortization	5,052	4,414
Intangible Assets, net	9,006	9,644
Portal (Technology)
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,351	8,351
Accumulated Amortization	3,690	3,256
Intangible Assets, net	4,661	5,095
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,497	5,497
Accumulated Amortization	1,153	981
Intangible Assets, net	4,344	4,516
Trade name/trademark
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	200	200
Accumulated Amortization	200	171
Intangible Assets, net	0	29
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10	10
Accumulated Amortization	9	6
Intangible Assets, net	$ 1	$ 4