Fair Value Measurements, Fair Value Measurements by Level for Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
$ 1,151,643
|
$ 1,133,645
|
|
| Equity securities |
270,349
|
197,071
|
|
| Total |
5,788
|
5,276
|
|
| Obligations of Government-sponsored Enterprises [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
41,514
|
116,240
|
|
| U.S. Treasury Securities and Obligations of U.S. Government Instrumentalities [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
85,800
|
163,270
|
|
| Obligations of the Commonwealth of Puerto Rico and its instrumentalities [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
20,051
|
25,619
|
|
| Municipal Securities [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
683,803
|
647,446
|
|
| Corporate Bonds [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
274,872
|
157,408
|
|
| Residential Agency Mortgage-backed Securities [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
718
|
937
|
|
| Collateralized Mortgage Obligations [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
44,885
|
22,725
|
|
| Mutual Funds [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
11,582
|
13,189
|
$ 0
|
| Equity securities |
270,349
|
197,071
|
|
| Fair Value, Measurements, Recurring [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
1,151,643
|
1,133,645
|
|
| Total |
1,421,992
|
1,330,716
|
|
| Fair Value, Measurements, Recurring [Member] | Level 1 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
85,800
|
163,270
|
|
| Total |
252,395
|
330,352
|
|
| Fair Value, Measurements, Recurring [Member] | Level 2 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
1,065,843
|
970,375
|
|
| Total |
1,142,065
|
992,406
|
|
| Fair Value, Measurements, Recurring [Member] | Level 3 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Total |
27,532
|
7,958
|
|
| Fair Value, Measurements, Recurring [Member] | Obligations of Government-sponsored Enterprises [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
41,514
|
116,240
|
|
| Fair Value, Measurements, Recurring [Member] | Obligations of Government-sponsored Enterprises [Member] | Level 1 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | Obligations of Government-sponsored Enterprises [Member] | Level 2 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
41,514
|
116,240
|
|
| Fair Value, Measurements, Recurring [Member] | Obligations of Government-sponsored Enterprises [Member] | Level 3 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities and Obligations of U.S. Government Instrumentalities [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
85,800
|
163,270
|
|
| Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities and Obligations of U.S. Government Instrumentalities [Member] | Level 1 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
85,800
|
163,270
|
|
| Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities and Obligations of U.S. Government Instrumentalities [Member] | Level 2 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | U.S. Treasury Securities and Obligations of U.S. Government Instrumentalities [Member] | Level 3 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | Obligations of the Commonwealth of Puerto Rico and its instrumentalities [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
20,051
|
25,619
|
|
| Fair Value, Measurements, Recurring [Member] | Obligations of the Commonwealth of Puerto Rico and its instrumentalities [Member] | Level 1 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | Obligations of the Commonwealth of Puerto Rico and its instrumentalities [Member] | Level 2 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
20,051
|
25,619
|
|
| Fair Value, Measurements, Recurring [Member] | Obligations of the Commonwealth of Puerto Rico and its instrumentalities [Member] | Level 3 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | Municipal Securities [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
683,803
|
647,446
|
|
| Fair Value, Measurements, Recurring [Member] | Municipal Securities [Member] | Level 1 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | Municipal Securities [Member] | Level 2 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
683,803
|
647,446
|
|
| Fair Value, Measurements, Recurring [Member] | Municipal Securities [Member] | Level 3 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
274,872
|
157,408
|
|
| Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] | Level 1 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] | Level 2 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
274,872
|
157,408
|
|
| Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member] | Level 3 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | Residential Agency Mortgage-backed Securities [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
718
|
937
|
|
| Fair Value, Measurements, Recurring [Member] | Residential Agency Mortgage-backed Securities [Member] | Level 1 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | Residential Agency Mortgage-backed Securities [Member] | Level 2 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
718
|
937
|
|
| Fair Value, Measurements, Recurring [Member] | Residential Agency Mortgage-backed Securities [Member] | Level 3 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
44,885
|
22,725
|
|
| Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member] | Level 1 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member] | Level 2 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
44,885
|
22,725
|
|
| Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Obligations [Member] | Level 3 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Fixed maturities |
0
|
0
|
|
| Fair Value, Measurements, Recurring [Member] | Mutual Funds [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Equity securities |
270,349
|
197,071
|
|
| Fair Value, Measurements, Recurring [Member] | Mutual Funds [Member] | Level 1 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Equity securities |
166,595
|
167,082
|
|
| Fair Value, Measurements, Recurring [Member] | Mutual Funds [Member] | Level 2 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Equity securities |
76,222
|
22,031
|
|
| Fair Value, Measurements, Recurring [Member] | Mutual Funds [Member] | Level 3 [Member] |
|
|
|
| Securities available for sale [Abstract] |
|
|
|
| Equity securities |
$ 27,532
|
$ 7,958
|
|