Intangible Assets Intangible assets table (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 20,745 $ 20,745
Finite-Lived Intangible Assets, Accumulated Amortization 6,009 4,765
Intangible assets, net of accumulated amortization of $6,009 and $4,765, respectively 14,736 15,980
Database Rights [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 4,918 4,918
Finite-Lived Intangible Assets, Accumulated Amortization 1,537 1,045
Finite-Lived Intangible Assets, Net 3,381 3,873
Service Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 3,680 3,680
Finite-Lived Intangible Assets, Accumulated Amortization 3,362 2,975
Finite-Lived Intangible Assets, Net 318 705
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 3,611 3,611
Finite-Lived Intangible Assets, Accumulated Amortization 1,040 695
Finite-Lived Intangible Assets, Net 2,571 2,916
Noncompete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 70 70
Finite-Lived Intangible Assets, Accumulated Amortization 70 50
Finite-Lived Intangible Assets, Net 0 20
Contractual Rights [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Accumulated Amortization 0  
Indefinite-Lived Intangible Assets (Excluding Goodwill) 7,803 7,803
Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Indefinite-Lived Intangible Assets (Excluding Goodwill) 663 $ 663
Trademarks and Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Accumulated Amortization $ 0