Contingencies (Details)
$ in Thousands
12 Months Ended
Dec. 17, 2015
Lawsuit
Apr. 17, 2015
USD ($)
Jan. 12, 2015
USD ($)
Jul. 02, 2014
USD ($)
Dec. 31, 2016
USD ($)
Lawsuit
shares
Triple-S Salud, Inc [Member]          
Loss Contingencies [Line Items]          
Amount of claims for damages       $ 5,000  
Overpayment of premium       $ 7,900  
Claims by Heirs of Former Shareholders [Member]          
Loss Contingencies [Line Items]          
Number of defending individual lawsuits | Lawsuit         8
Number of shares claimed to have inherited (in shares) | shares         113
Split conversion ratio         3,000
Joint Underwriting Association Litigations [Member]          
Loss Contingencies [Line Items]          
Number of defending individual lawsuits | Lawsuit         18
Lawsuit filing date         August 19, 2011
Percentage of premium amount charged as administrative cost         12.00%
Amount of claims for damages         $ 406,600
TSP [Member]          
Loss Contingencies [Line Items]          
Number of defending individual lawsuits | Lawsuit 3        
Period for defendant conducting negotiations         60 days
Community Health Centers - Puerto Rico [Member] | Insurance Claims [Member]          
Loss Contingencies [Line Items]          
Number of defending individual lawsuits | Lawsuit         6
Claims Relating to the Provision of Health Care Services [Abstract]          
Amount of claim for collection of unpaid invoices         $ 9,600
Complaint from Medical Service Provider [Member] | Insurance Claims [Member]          
Loss Contingencies [Line Items]          
Amount of claims for damages   $ 5,073      
Complaint by American Clinical Solutions LLC [Member] | Insurance Claims [Member] | Triple-S Salud, Inc [Member]          
Loss Contingencies [Line Items]          
Amount of claims for damages     $ 5,000