XML 38 R29.htm IDEA: XBRL DOCUMENT v3.10.0.1
Summary of Business and Significant Accounting Policies (Narrative) (Details)
$ in Thousands
 12 Months Ended 20 Months Ended
Dec. 31, 2017
USD ($)
segment
state
Dec. 31, 2016
USD ($)
segment
Dec. 31, 2015
USD ($)
Jun. 30, 2012
USD ($)
Accounting Policies [Abstract]        
Finite-lived Intangible Assets Acquired       $ 13,900
Advertising Expense $ 56,000 $ 64,800 $ 66,500  
Research and Development Expense 7,600 8,900 10,600  
Capitalized Computer Software, Additions [1] $ (3,210) $ (1,837) (1,117)  
Number of states in which the Company is licensed to market and sell health insurance | state 50      
Number of operating segments | segment 2 2    
Prior period reclassification adjustment   $ 800 600  
Amortization of internally developed software [1] $ 1,464 936 627  
Defined Contribution Plan Disclosure [Line Items]        
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 25.00%      
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 1.00%      
Defined Contribution Plan, Matching Contributions Vesting Period 3 years      
Defined Contribution Plan, Employer Discretionary Contribution Amount $ 400 300 300  
Book-of-Business, Margin Earned $ 900 $ 1,000 $ 1,200  
[1] As adjusted for the adoption of ASC 606 using the full retrospective method