Schedule II - Condensed Financial Information of Triple-S Management Corporation, Long-Term Borrowings (Details)
$ in Thousands
12 Months Ended
Dec. 28, 2016
USD ($)
Loan
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Summary of Long-term Borrowings [Abstract]      
Total borrowings   $ 35,187 $ 36,827
Less unamortized debt issuance costs   102 0
Long-term borrowings   35,085 36,827
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
2017   1,640  
2018   1,640  
2019   1,640  
2020   25,640  
2021   1,640  
Thereafter   2,987  
Total borrowings   35,187 36,827
Senior Notes [Member] | 6.60% Senior Unsecured Notes Payable, Due December 2020 [Member]      
Summary of Long-term Borrowings [Abstract]      
Total borrowings   24,000 24,000
Debt instrument, principal amount   $ 60,000  
Debt instrument, maturity date   Dec. 31, 2020  
Debt instrument, fixed interest rate   6.60%  
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Total borrowings   $ 24,000 24,000
Debt instrument, period of prepayment at par   5 years  
Secured Debt [Member] | Secured Loans Payable, Due July 2024 [Member]      
Summary of Long-term Borrowings [Abstract]      
Total borrowings   $ 0 12,827
Debt instrument, principal amount     $ 41,000
Debt instrument, maturity date     Jul. 01, 2024
Debt instrument, monthly installment payment     $ 137
Basis spread on variable rate     1.00%
Debt instrument, variable interest rate     1.23%
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Total borrowings   0 $ 12,827
Secured Debt [Member] | Secured Loans Payable, Due October 2023 [Member]      
Summary of Long-term Borrowings [Abstract]      
Total borrowings   11,187 0
Debt instrument, principal amount   $ 11,187  
Debt instrument, maturity date   Oct. 01, 2023  
Debt instrument, monthly installment payment   $ 137  
Basis spread on variable rate   1.00%  
Debt instrument, variable interest rate   1.77%  
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Total borrowings   $ 11,187 0
Parent Company [Member]      
Summary of Long-term Borrowings [Abstract]      
Total borrowings   35,187 36,827
Less unamortized debt issuance costs   102 0
Long-term borrowings   35,085 36,827
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
2017   1,640  
2018   1,640  
2019   1,640  
2020   25,640  
2021   1,640  
Thereafter   2,987  
Total borrowings   35,187 36,827
Parent Company [Member] | Senior Notes [Member] | 6.60% Senior Unsecured Notes Payable, Due December 2020 [Member]      
Summary of Long-term Borrowings [Abstract]      
Total borrowings   24,000 24,000
Debt instrument, principal amount   $ 60,000  
Debt instrument, maturity date   Dec. 31, 2020  
Debt instrument, fixed interest rate   6.60%  
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Total borrowings   $ 24,000 24,000
Debt instrument, period of prepayment at par   5 years  
Parent Company [Member] | Secured Debt [Member] | Secured Loans Payable, Due July 2024 [Member]      
Summary of Long-term Borrowings [Abstract]      
Total borrowings   $ 0 12,827
Debt instrument, principal amount     $ 41,000
Debt instrument, maturity date     Jul. 01, 2024
Debt instrument, monthly installment payment     $ 137
Basis spread on variable rate     1.00%
Debt instrument, variable interest rate     1.23%
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Total borrowings   0 $ 12,827
Parent Company [Member] | Secured Debt [Member] | Secured Loans Payable, Due October 2023 [Member]      
Summary of Long-term Borrowings [Abstract]      
Total borrowings   11,187 0
Debt instrument, principal amount   $ 11,187  
Debt instrument, maturity date   Oct. 01, 2023  
Debt instrument, monthly installment payment   $ 137  
Basis spread on variable rate   1.00%  
Debt instrument, variable interest rate   1.77%  
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Total borrowings   $ 11,187 $ 0
Commercial Bank in Puerto Rico [Member]      
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Maximum borrowing capacity $ 35,500    
Number of term loans issued | Loan 3    
Proceeds from debt issuance used to fund portion of debt service reserve $ 200    
Commercial Bank in Puerto Rico [Member] | First Year [Member]      
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Prepayment penalty fee percentage   3.00%  
Commercial Bank in Puerto Rico [Member] | Second Year [Member]      
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Prepayment penalty fee percentage   2.00%  
Commercial Bank in Puerto Rico [Member] | Third Year [Member]      
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Prepayment penalty fee percentage   1.00%  
Commercial Bank in Puerto Rico [Member] | Term Loan A [Member]      
Summary of Long-term Borrowings [Abstract]      
Debt instrument, principal amount $ 11,187    
Debt instrument, maturity date   Oct. 01, 2023  
Commercial Bank in Puerto Rico [Member] | Term Loan A [Member] | LIBOR [Member]      
Summary of Long-term Borrowings [Abstract]      
Basis spread on variable rate 1.00%    
Commercial Bank in Puerto Rico [Member] | Term Loan B [Member]      
Summary of Long-term Borrowings [Abstract]      
Debt instrument, principal amount $ 20,150    
Debt instrument, maturity date   Jan. 31, 2024  
Commercial Bank in Puerto Rico [Member] | Term Loan B [Member] | LIBOR [Member]      
Summary of Long-term Borrowings [Abstract]      
Basis spread on variable rate 2.75%    
Commercial Bank in Puerto Rico [Member] | Term Loan C [Member]      
Summary of Long-term Borrowings [Abstract]      
Debt instrument, principal amount $ 4,116    
Debt instrument, maturity date   Jan. 31, 2024  
Commercial Bank in Puerto Rico [Member] | Term Loan C [Member] | LIBOR [Member]      
Summary of Long-term Borrowings [Abstract]      
Basis spread on variable rate 3.25%    
Commercial Bank in Puerto Rico [Member] | Senior Notes [Member] | 6.60% Senior Unsecured Notes Payable, Due January 2021 [Member]      
Summary of Long-term Borrowings [Abstract]      
Debt instrument, maturity date   Jan. 31, 2021  
Debt instrument, fixed interest rate 6.60%    
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Repaid principal amount of notes $ 24,000    
Commercial Bank in Puerto Rico [Member] | Parent Company [Member]      
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Maximum borrowing capacity $ 35,500    
Number of term loans issued | Loan 3    
Proceeds from debt issuance used to fund portion of debt service reserve $ 200    
Commercial Bank in Puerto Rico [Member] | Parent Company [Member] | First Year [Member]      
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Prepayment penalty fee percentage   3.00%  
Commercial Bank in Puerto Rico [Member] | Parent Company [Member] | Second Year [Member]      
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Prepayment penalty fee percentage   2.00%  
Commercial Bank in Puerto Rico [Member] | Parent Company [Member] | Third Year [Member]      
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Prepayment penalty fee percentage   1.00%  
Commercial Bank in Puerto Rico [Member] | Parent Company [Member] | Term Loan A [Member]      
Summary of Long-term Borrowings [Abstract]      
Debt instrument, principal amount $ 11,187    
Debt instrument, maturity date   Oct. 01, 2023  
Commercial Bank in Puerto Rico [Member] | Parent Company [Member] | Term Loan A [Member] | LIBOR [Member]      
Summary of Long-term Borrowings [Abstract]      
Basis spread on variable rate 1.00%    
Commercial Bank in Puerto Rico [Member] | Parent Company [Member] | Term Loan B [Member]      
Summary of Long-term Borrowings [Abstract]      
Debt instrument, principal amount $ 20,150    
Debt instrument, maturity date   Jan. 31, 2024  
Commercial Bank in Puerto Rico [Member] | Parent Company [Member] | Term Loan B [Member] | LIBOR [Member]      
Summary of Long-term Borrowings [Abstract]      
Basis spread on variable rate 2.75%    
Commercial Bank in Puerto Rico [Member] | Parent Company [Member] | Term Loan C [Member]      
Summary of Long-term Borrowings [Abstract]      
Debt instrument, principal amount $ 4,116    
Debt instrument, maturity date   Jan. 31, 2024  
Commercial Bank in Puerto Rico [Member] | Parent Company [Member] | Term Loan C [Member] | LIBOR [Member]      
Summary of Long-term Borrowings [Abstract]      
Basis spread on variable rate 3.25%    
Commercial Bank in Puerto Rico [Member] | Parent Company [Member] | Senior Notes [Member] | 6.60% Senior Unsecured Notes Payable, Due January 2021 [Member]      
Summary of Long-term Borrowings [Abstract]      
Debt instrument, maturity date   Jan. 31, 2021  
Debt instrument, fixed interest rate 6.60%    
Aggregate Maturities of Company's Long Term Borrowings [Abstract]      
Repaid principal amount of notes $ 24,000