Intangible Assets Intangible Assets (Tables) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Apr. 20, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 95,948	$ 96,198
Finite-Lived Intangible Assets, Accumulated Amortization	7,761	7,181
Intangible Assets, Net (Excluding Goodwill)	88,187	89,017		$ 731
Database Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	4,918	4,918
Finite-Lived Intangible Assets, Accumulated Amortization	2,275	2,029
Finite-Lived Intangible Assets, Net	2,643	2,889
Service Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	3,680	3,680
Finite-Lived Intangible Assets, Accumulated Amortization	3,597	3,554
Finite-Lived Intangible Assets, Net	83	126
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	3,611	3,611
Finite-Lived Intangible Assets, Accumulated Amortization	1,748	1,521
Finite-Lived Intangible Assets, Net	1,863	2,090
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,125	1,125
Finite-Lived Intangible Assets, Accumulated Amortization	60	29
Finite-Lived Intangible Assets, Net	1,065	1,096
Contract-Based Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		731	$ 731
Finite-Lived Intangible Assets, Accumulated Amortization	81	48
Finite-Lived Intangible Assets, Net		683
Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	650
Insurance Contracts Acquired in Business Combination [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		73,667
Finite-Lived Intangible Assets, Accumulated Amortization	0	0
Indefinite-Lived Intangible Assets (Excluding Goodwill)	73,667
Indefinite-Lived License Agreements	73,667	73,667
Contractual Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	0	0
Indefinite-Lived Intangible Assets (Excluding Goodwill)	7,553	7,803
Indefinite-Lived Contractual Rights	7,553	7,803
Trademarks and Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	0	0
Indefinite-Lived Intangible Assets (Excluding Goodwill)	663	663
Indefinite-Lived License Agreements	$ 663	$ 663