Investment in Securities (Details) (USD $) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |
In Thousands, unless otherwise specified | Oct. 31, 2013 | Sep. 30, 2014 | Jun. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013 |
| Security | Security | Security |
Available-for-sale debt securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | $1,058,837 | ' | ' | $1,058,837 | ' | $1,031,480 |
Gross unrealized gains | ' | 63,984 | ' | ' | 63,984 | ' | 35,791 |
Gross unrealized losses | ' | -2,546 | ' | ' | -2,546 | ' | -11,397 |
Estimated fair value | ' | 1,120,275 | ' | ' | 1,120,275 | ' | 1,055,874 |
Available-for-sale equity securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 204,882 | ' | ' | 204,882 | ' | 239,933 |
Available-for-sale securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 1,207,978 | ' | ' | 1,207,978 | ' | 1,218,836 |
Gross unrealized gains | ' | 119,738 | ' | ' | 119,738 | ' | 88,804 |
Gross unrealized losses | ' | -2,559 | ' | ' | -2,559 | ' | -11,833 |
Estimated fair value | ' | 1,325,157 | ' | ' | 1,325,157 | ' | 1,295,807 |
Securities held to maturity [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 4,072 | ' | ' | 4,072 | ' | 6,139 |
Gross unrealized gains | ' | 186 | ' | ' | 186 | ' | 170 |
Gross unrealized losses | ' | 0 | ' | ' | 0 | ' | 0 |
Estimated fair value | ' | 4,258 | ' | ' | 4,258 | ' | 6,309 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Estimated Fair Value | ' | 143,598 | ' | ' | 143,598 | ' | 375,240 |
12 months or longer, Estimated Fair Value | ' | 74,867 | ' | ' | 74,867 | ' | 14,115 |
Estimated Fair Value, Total | ' | 218,465 | ' | ' | 218,465 | ' | 389,355 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Gross Unrealized Losses | ' | ' | ' | ' | -1,105 | ' | -11,669 |
12 months or longer, Gross Unrealized Losses | ' | ' | ' | ' | -1,454 | ' | -164 |
Gross Unrealized Losses, Total | ' | ' | ' | ' | -2,559 | ' | -11,833 |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Securities [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Number of Securities | ' | 26 | ' | ' | 26 | ' | 103 |
12 months or longer, Number of Securities | ' | 19 | ' | ' | 19 | ' | 4 |
Number of Securities | ' | 45 | ' | ' | 45 | ' | 107 |
Minimum percentage of gross unrealized investment losses as cost (in hundredths) | ' | ' | ' | ' | 20.00% | ' | ' |
Minimum unrealized loss of investment as indicator of other-than-temporary impairment | ' | ' | ' | ' | 100 | ' | ' |
Percentage of sales tax levied on bonds (in hundredths) | ' | ' | ' | ' | 7.00% | ' | ' |
Percentage of portion on sales tax bonds belongs to municipalities (in hundredths) | ' | ' | ' | ' | 1.50% | ' | ' |
Percentage of remaining portion on sales tax bonds (in hundredths) | ' | ' | ' | ' | 5.50% | ' | ' |
Covenant percentage pledged on sales tax bond (in hundredths) | ' | ' | ' | ' | 3.50% | ' | ' |
Percentage of pledged amount on sales tax bond (in hundredths) | 3.50% | ' | ' | ' | 2.75% | ' | ' |
Impairment amount | ' | ' | 462 | ' | ' | ' | ' |
Realized gain | ' | 26 | ' | ' | ' | ' | ' |
Securities available for sale, Amortized Cost [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Due in one year or less, amortized cost | ' | 25,047 | ' | ' | 25,047 | ' | ' |
Due after one year through five, amortized cost | ' | 372,874 | ' | ' | 372,874 | ' | ' |
Due after five year through ten years, amortized cost | ' | 134,061 | ' | ' | 134,061 | ' | ' |
Due after ten years, amortized cost | ' | 463,129 | ' | ' | 463,129 | ' | ' |
Residential mortgage-backed securities, amortized Cost | ' | 8,101 | ' | ' | 8,101 | ' | ' |
Collateralized mortgage obligations, amortized cost | ' | 55,625 | ' | ' | 55,625 | ' | ' |
Amortized cost | ' | 1,058,837 | ' | ' | 1,058,837 | ' | 1,031,480 |
Securities available for sale, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Due in one year or less, estimated fair value | ' | 25,255 | ' | ' | 25,255 | ' | ' |
Due after one year through five, estimated fair value | ' | 378,998 | ' | ' | 378,998 | ' | ' |
Due after five year through ten years, estimated fair value | ' | 141,211 | ' | ' | 141,211 | ' | ' |
Due after ten years, estimated fair value | ' | 508,502 | ' | ' | 508,502 | ' | ' |
Residential mortgage-backed securities, estimated fair value | ' | 8,532 | ' | ' | 8,532 | ' | ' |
Collateralized mortgage obligations, estimated fair value | ' | 57,777 | ' | ' | 57,777 | ' | ' |
Estimated fair value | ' | 1,120,275 | ' | ' | 1,120,275 | ' | 1,055,874 |
Securities held to maturity, Amortized Cost [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Due in one year or less, amortized Cost | ' | 3,233 | ' | ' | 3,233 | ' | ' |
Due after ten years, amortized cost | ' | 622 | ' | ' | 622 | ' | ' |
Residential mortgage-backed securities, amortized cost | ' | 217 | ' | ' | 217 | ' | ' |
Amortized cost | ' | 4,072 | ' | ' | 4,072 | ' | 6,139 |
Securities held to maturity, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Due in one year or less, estimated fair value | ' | 3,233 | ' | ' | 3,233 | ' | ' |
Due after ten years, estimated fair value | ' | 788 | ' | ' | 788 | ' | ' |
Residential mortgage-backed securities, estimated fair value | ' | 237 | ' | ' | 237 | ' | ' |
Estimated fair value | ' | 4,258 | ' | ' | 4,258 | ' | 6,309 |
Securities available for sale [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Net realized gains (losses) on securities available for sale | ' | 3,108 | ' | -144 | 5,737 | 3,405 | ' |
Gross gain from other investment | ' | 0 | ' | 0 | 1,425 | 0 | ' |
Total net realized investment gains (losses) | ' | 3,108 | ' | -144 | 7,162 | 3,405 | ' |
Recognized in accumulated other comprehensive income [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale Securities | ' | -8,656 | ' | -6,333 | 40,208 | -46,845 | ' |
Not recognized in the consolidated financial statements [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Fixed maturities - held to maturity | ' | 3 | ' | -41 | 16 | -159 | ' |
Deferred tax asset (liability) related to unrealized gains and losses | ' | -5,615 | ' | 6,937 | -5,615 | 6,937 | ' |
Percentage of individual investment in securities to stockholders' equity (in hundredths) | ' | ' | ' | ' | 10.00% | ' | 10.00% |
Obligation Government-sponsored Enterprises [Member] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale debt securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 126,898 | ' | ' | 126,898 | ' | 104,317 |
Gross unrealized gains | ' | 1,122 | ' | ' | 1,122 | ' | 1,854 |
Gross unrealized losses | ' | -171 | ' | ' | -171 | ' | -380 |
Estimated fair value | ' | 127,849 | ' | ' | 127,849 | ' | 105,791 |
Securities held to maturity [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | ' | ' | ' | ' | ' | 1,793 |
Gross unrealized gains | ' | ' | ' | ' | ' | ' | 26 |
Gross unrealized losses | ' | ' | ' | ' | ' | ' | 0 |
Estimated fair value | ' | ' | ' | ' | ' | ' | 1,819 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Estimated Fair Value | ' | 56,824 | ' | ' | 56,824 | ' | 46,797 |
12 months or longer, Estimated Fair Value | ' | 0 | ' | ' | 0 | ' | 0 |
Estimated Fair Value, Total | ' | 56,824 | ' | ' | 56,824 | ' | 46,797 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Gross Unrealized Losses | ' | ' | ' | ' | -171 | ' | -380 |
12 months or longer, Gross Unrealized Losses | ' | ' | ' | ' | 0 | ' | 0 |
Gross Unrealized Losses, Total | ' | ' | ' | ' | -171 | ' | -380 |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Securities [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Number of Securities | ' | 5 | ' | ' | 5 | ' | 4 |
12 months or longer, Number of Securities | ' | 0 | ' | ' | 0 | ' | 0 |
Number of Securities | ' | 5 | ' | ' | 5 | ' | 4 |
Securities available for sale, Amortized Cost [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 126,898 | ' | ' | 126,898 | ' | 104,317 |
Securities available for sale, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 127,849 | ' | ' | 127,849 | ' | 105,791 |
Securities held to maturity, Amortized Cost [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | ' | ' | ' | ' | ' | 1,793 |
Securities held to maturity, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | ' | ' | ' | ' | ' | 1,819 |
U.S. Treasury Securities and Obligations of U.S. Government Instrumentalities [Member] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale debt securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 59,960 | ' | ' | 59,960 | ' | 38,131 |
Gross unrealized gains | ' | 727 | ' | ' | 727 | ' | 1,068 |
Gross unrealized losses | ' | -70 | ' | ' | -70 | ' | 0 |
Estimated fair value | ' | 60,617 | ' | ' | 60,617 | ' | 39,199 |
Securities held to maturity [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 622 | ' | ' | 622 | ' | 622 |
Gross unrealized gains | ' | 166 | ' | ' | 166 | ' | 117 |
Gross unrealized losses | ' | 0 | ' | ' | 0 | ' | 0 |
Estimated fair value | ' | 788 | ' | ' | 788 | ' | 739 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Estimated Fair Value | ' | 22,443 | ' | ' | 22,443 | ' | ' |
12 months or longer, Estimated Fair Value | ' | 0 | ' | ' | 0 | ' | ' |
Estimated Fair Value, Total | ' | 22,443 | ' | ' | 22,443 | ' | ' |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Gross Unrealized Losses | ' | ' | ' | ' | -70 | ' | ' |
12 months or longer, Gross Unrealized Losses | ' | ' | ' | ' | 0 | ' | ' |
Gross Unrealized Losses, Total | ' | ' | ' | ' | -70 | ' | ' |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Securities [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Number of Securities | ' | 2 | ' | ' | 2 | ' | ' |
12 months or longer, Number of Securities | ' | 0 | ' | ' | 0 | ' | ' |
Number of Securities | ' | 2 | ' | ' | 2 | ' | ' |
Securities available for sale, Amortized Cost [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 59,960 | ' | ' | 59,960 | ' | 38,131 |
Securities available for sale, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 60,617 | ' | ' | 60,617 | ' | 39,199 |
Securities held to maturity, Amortized Cost [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 622 | ' | ' | 622 | ' | 622 |
Securities held to maturity, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 788 | ' | ' | 788 | ' | 739 |
Obligations of The Commonwealth of Puerto Rico and Its Instrumentalities [Member] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale debt securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 45,990 | ' | ' | 45,990 | ' | 49,557 |
Gross unrealized gains | ' | 394 | ' | ' | 394 | ' | 262 |
Gross unrealized losses | ' | -1,534 | ' | ' | -1,534 | ' | -4,814 |
Estimated fair value | ' | 44,850 | ' | ' | 44,850 | ' | 45,005 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Estimated Fair Value | ' | 10,840 | ' | ' | 10,840 | ' | 22,285 |
12 months or longer, Estimated Fair Value | ' | 5,215 | ' | ' | 5,215 | ' | 0 |
Estimated Fair Value, Total | ' | 16,055 | ' | ' | 16,055 | ' | 22,285 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Gross Unrealized Losses | ' | ' | ' | ' | -614 | ' | -4,814 |
12 months or longer, Gross Unrealized Losses | ' | ' | ' | ' | -920 | ' | 0 |
Gross Unrealized Losses, Total | ' | ' | ' | ' | -1,534 | ' | -4,814 |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Securities [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Number of Securities | ' | 6 | ' | ' | 6 | ' | 13 |
12 months or longer, Number of Securities | ' | 1 | ' | ' | 1 | ' | 0 |
Number of Securities | ' | 7 | ' | ' | 7 | ' | 13 |
Securities available for sale, Amortized Cost [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 45,990 | ' | ' | 45,990 | ' | 49,557 |
Securities available for sale, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 44,850 | ' | ' | 44,850 | ' | 45,005 |
Municipal Securities [Member] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale debt securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 583,329 | ' | ' | 583,329 | ' | 597,297 |
Gross unrealized gains | ' | 42,662 | ' | ' | 42,662 | ' | 19,328 |
Gross unrealized losses | ' | -384 | ' | ' | -384 | ' | -5,182 |
Estimated fair value | ' | 625,607 | ' | ' | 625,607 | ' | 611,443 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Estimated Fair Value | ' | 26,205 | ' | ' | 26,205 | ' | 234,594 |
12 months or longer, Estimated Fair Value | ' | 35,433 | ' | ' | 35,433 | ' | 4,646 |
Estimated Fair Value, Total | ' | 61,638 | ' | ' | 61,638 | ' | 239,240 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Gross Unrealized Losses | ' | ' | ' | ' | -128 | ' | -5,145 |
12 months or longer, Gross Unrealized Losses | ' | ' | ' | ' | -256 | ' | -37 |
Gross Unrealized Losses, Total | ' | ' | ' | ' | -384 | ' | -5,182 |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Securities [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Number of Securities | ' | 7 | ' | ' | 7 | ' | 51 |
12 months or longer, Number of Securities | ' | 9 | ' | ' | 9 | ' | 1 |
Number of Securities | ' | 16 | ' | ' | 16 | ' | 52 |
Securities available for sale, Amortized Cost [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 583,329 | ' | ' | 583,329 | ' | 597,297 |
Securities available for sale, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 625,607 | ' | ' | 625,607 | ' | 611,443 |
Corporate Bonds [Member] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale debt securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 178,934 | ' | ' | 178,934 | ' | 146,936 |
Gross unrealized gains | ' | 16,489 | ' | ' | 16,489 | ' | 9,883 |
Gross unrealized losses | ' | -380 | ' | ' | -380 | ' | -879 |
Estimated fair value | ' | 195,043 | ' | ' | 195,043 | ' | 155,940 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Estimated Fair Value | ' | 25,614 | ' | ' | 25,614 | ' | 45,203 |
12 months or longer, Estimated Fair Value | ' | 31,302 | ' | ' | 31,302 | ' | 0 |
Estimated Fair Value, Total | ' | 56,916 | ' | ' | 56,916 | ' | 45,203 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Gross Unrealized Losses | ' | ' | ' | ' | -109 | ' | -879 |
12 months or longer, Gross Unrealized Losses | ' | ' | ' | ' | -271 | ' | 0 |
Gross Unrealized Losses, Total | ' | ' | ' | ' | -380 | ' | -879 |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Securities [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Number of Securities | ' | 5 | ' | ' | 5 | ' | 19 |
12 months or longer, Number of Securities | ' | 8 | ' | ' | 8 | ' | 0 |
Number of Securities | ' | 13 | ' | ' | 13 | ' | 19 |
Securities available for sale, Amortized Cost [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 178,934 | ' | ' | 178,934 | ' | 146,936 |
Securities available for sale, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 195,043 | ' | ' | 195,043 | ' | 155,940 |
Residential Mortgage-backed Securities [Member] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale debt securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 8,101 | ' | ' | 8,101 | ' | 7,388 |
Gross unrealized gains | ' | 431 | ' | ' | 431 | ' | 324 |
Gross unrealized losses | ' | 0 | ' | ' | 0 | ' | -9 |
Estimated fair value | ' | 8,532 | ' | ' | 8,532 | ' | 7,703 |
Securities held to maturity [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 217 | ' | ' | 217 | ' | 346 |
Gross unrealized gains | ' | 20 | ' | ' | 20 | ' | 27 |
Gross unrealized losses | ' | 0 | ' | ' | 0 | ' | 0 |
Estimated fair value | ' | 237 | ' | ' | 237 | ' | 373 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Estimated Fair Value | ' | ' | ' | ' | ' | ' | 24 |
12 months or longer, Estimated Fair Value | ' | ' | ' | ' | ' | ' | 0 |
Estimated Fair Value, Total | ' | ' | ' | ' | ' | ' | 24 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Gross Unrealized Losses | ' | ' | ' | ' | ' | ' | -9 |
12 months or longer, Gross Unrealized Losses | ' | ' | ' | ' | ' | ' | 0 |
Gross Unrealized Losses, Total | ' | ' | ' | ' | ' | ' | -9 |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Securities [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Number of Securities | ' | ' | ' | ' | ' | ' | 6 |
12 months or longer, Number of Securities | ' | ' | ' | ' | ' | ' | 0 |
Number of Securities | ' | ' | ' | ' | ' | ' | 6 |
Securities available for sale, Amortized Cost [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 8,101 | ' | ' | 8,101 | ' | 7,388 |
Securities available for sale, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 8,532 | ' | ' | 8,532 | ' | 7,703 |
Securities held to maturity, Amortized Cost [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 217 | ' | ' | 217 | ' | 346 |
Securities held to maturity, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 237 | ' | ' | 237 | ' | 373 |
Collateralized Mortgage Obligations [Member] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale debt securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 55,625 | ' | ' | 55,625 | ' | 87,854 |
Gross unrealized gains | ' | 2,159 | ' | ' | 2,159 | ' | 3,072 |
Gross unrealized losses | ' | -7 | ' | ' | -7 | ' | -133 |
Estimated fair value | ' | 57,777 | ' | ' | 57,777 | ' | 90,793 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Estimated Fair Value | ' | 0 | ' | ' | 0 | ' | 1,106 |
12 months or longer, Estimated Fair Value | ' | 2,917 | ' | ' | 2,917 | ' | 9,469 |
Estimated Fair Value, Total | ' | 2,917 | ' | ' | 2,917 | ' | 10,575 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Gross Unrealized Losses | ' | ' | ' | ' | 0 | ' | -6 |
12 months or longer, Gross Unrealized Losses | ' | ' | ' | ' | -7 | ' | -127 |
Gross Unrealized Losses, Total | ' | ' | ' | ' | -7 | ' | -133 |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Securities [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Number of Securities | ' | 0 | ' | ' | 0 | ' | 3 |
12 months or longer, Number of Securities | ' | 1 | ' | ' | 1 | ' | 3 |
Number of Securities | ' | 1 | ' | ' | 1 | ' | 6 |
Securities available for sale, Amortized Cost [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 55,625 | ' | ' | 55,625 | ' | 87,854 |
Securities available for sale, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 57,777 | ' | ' | 57,777 | ' | 90,793 |
Fixed Maturities [Member] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Estimated Fair Value | ' | 141,926 | ' | ' | 141,926 | ' | 350,009 |
12 months or longer, Estimated Fair Value | ' | 74,867 | ' | ' | 74,867 | ' | 14,115 |
Estimated Fair Value, Total | ' | 216,793 | ' | ' | 216,793 | ' | 364,124 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Gross Unrealized Losses | ' | ' | ' | ' | -1,092 | ' | -11,233 |
12 months or longer, Gross Unrealized Losses | ' | ' | ' | ' | -1,454 | ' | -164 |
Gross Unrealized Losses, Total | ' | ' | ' | ' | -2,546 | ' | -11,397 |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Securities [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Number of Securities | ' | 25 | ' | ' | 25 | ' | 96 |
12 months or longer, Number of Securities | ' | 19 | ' | ' | 19 | ' | 4 |
Number of Securities | ' | 44 | ' | ' | 44 | ' | 100 |
Securities available for sale [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Gross gains from sales | ' | 1,600 | ' | 620 | 3,303 | 2,900 | ' |
Gross losses from sales | ' | -1,934 | ' | -1,086 | -3,891 | -1,613 | ' |
Gross losses from other-than-temporary impairments | ' | 0 | ' | 0 | -462 | 0 | ' |
Total fixed maturity securities | ' | -334 | ' | -466 | -1,050 | 1,287 | ' |
Recognized in accumulated other comprehensive income [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale Securities | ' | -2,873 | ' | -14,052 | 37,044 | -62,094 | ' |
Mutual Funds [Member] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale equity securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 149,141 | ' | ' | 149,141 | ' | 187,356 |
Gross unrealized gains | ' | 55,754 | ' | ' | 55,754 | ' | 53,013 |
Gross unrealized losses | ' | -13 | ' | ' | -13 | ' | -436 |
Estimated fair value | ' | 204,882 | ' | ' | 204,882 | ' | 239,933 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Estimated Fair Value | ' | 1,672 | ' | ' | 1,672 | ' | 25,231 |
12 months or longer, Estimated Fair Value | ' | 0 | ' | ' | 0 | ' | 0 |
Estimated Fair Value, Total | ' | 1,672 | ' | ' | 1,672 | ' | 25,231 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Gross Unrealized Losses | ' | ' | ' | ' | -13 | ' | -436 |
12 months or longer, Gross Unrealized Losses | ' | ' | ' | ' | 0 | ' | 0 |
Gross Unrealized Losses, Total | ' | ' | ' | ' | -13 | ' | -436 |
Available-for-sale, Securities in Unrealized Loss Positions, Number of Securities [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Less than 12 months, Number of Securities | ' | 1 | ' | ' | 1 | ' | 7 |
12 months or longer, Number of Securities | ' | 0 | ' | ' | 0 | ' | 0 |
Number of Securities | ' | 1 | ' | ' | 1 | ' | 7 |
Equity Securities [Member] | ' | ' | ' | ' | ' | ' | ' |
Securities available for sale [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Gross gains from sales | ' | 3,488 | ' | 814 | 8,104 | 3,445 | ' |
Gross losses from sales | ' | -46 | ' | -492 | -1,317 | -1,327 | ' |
Total equity securities | ' | 3,442 | ' | 322 | 6,787 | 2,118 | ' |
Recognized in accumulated other comprehensive income [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale Securities | ' | -5,783 | ' | 7,719 | 3,164 | 15,249 | ' |
Certificates of Deposit [Member] | ' | ' | ' | ' | ' | ' | ' |
Securities held to maturity [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 3,233 | ' | ' | 3,233 | ' | 3,378 |
Gross unrealized gains | ' | 0 | ' | ' | 0 | ' | 0 |
Gross unrealized losses | ' | 0 | ' | ' | 0 | ' | 0 |
Estimated fair value | ' | 3,233 | ' | ' | 3,233 | ' | 3,378 |
Securities held to maturity, Amortized Cost [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Amortized cost | ' | 3,233 | ' | ' | 3,233 | ' | 3,378 |
Securities held to maturity, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 3,233 | ' | ' | 3,233 | ' | 3,378 |
Escrow Bonds [Member] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale debt securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 22,385 | ' | ' | 22,385 | ' | ' |
Available-for-sale securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Gross unrealized gains | ' | ' | ' | ' | 185 | ' | ' |
Securities available for sale, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 22,385 | ' | ' | 22,385 | ' | ' |
Cofina Bonds [Member] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale debt securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 20,785 | ' | ' | 20,785 | ' | ' |
Available-for-sale securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Gross unrealized gains | ' | ' | ' | ' | 128 | ' | ' |
Gross unrealized losses | ' | ' | ' | ' | -1,534 | ' | ' |
Securities available for sale, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 20,785 | ' | ' | 20,785 | ' | ' |
Puerto Rico Bonds [Member] | ' | ' | ' | ' | ' | ' | ' |
Available-for-sale debt securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | 1,680 | ' | ' | 1,680 | ' | ' |
Available-for-sale securities, amortized cost basis [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Gross unrealized gains | ' | ' | ' | ' | 81 | ' | ' |
Securities available for sale, Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' | ' | ' |
Estimated fair value | ' | $1,680 | ' | ' | $1,680 | ' | ' |