Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 14,058	$ 6,248
Accumulated Amortization	4,414	2,217
Intangible Assets, net	9,644	4,031
Portal
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,351	4,151
Accumulated Amortization	3,256	1,770
Intangible Assets, net	5,095	2,381
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,497	2,097
Accumulated Amortization	981	447
Intangible Assets, net	4,516	1,650
Trade name/trademark
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	200	0
Accumulated Amortization	171	0
Intangible Assets, net	29	0
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10	0
Accumulated Amortization	6	0
Intangible Assets, net	$ 4	$ 0