|
Investments - Scheduled Maturities of Company's Fixed Maturity Securities Based on their Fair Values (Detail) (USD $)
In Thousands, unless otherwise specified
|
Dec. 31, 2014
|
Dec. 31, 2013
|
| Schedule of Available-for-sale Securities [Line Items] |
|
|
| Securities with Unrealized Losses, Total |
$ 38,072 |
$ 37,921 |
| Fixed Maturities |
|
|
| Schedule of Available-for-sale Securities [Line Items] |
|
|
| Securities with Unrealized Gains, One year or less |
8,791 |
14,305 |
| Securities with Unrealized Gains, After one through five years |
22,140 |
25,667 |
| Securities with Unrealized Gains, After five through ten years |
24,980 |
20,445 |
| Securities with Unrealized Gains, After ten years |
9,009 |
3,667 |
| Securities with Unrealized Gains, No single maturity date |
12,022 |
15,928 |
| Securities with Unrealized Gains, Total |
76,942 |
80,012 |
| Securities with Unrealized Losses, After one through five years |
12,888 |
10,888 |
| Securities with Unrealized Losses, After five through ten years |
21,450 |
22,836 |
| Securities with Unrealized Losses, After ten years |
1,742 |
4,008 |
| Securities with Unrealized Losses, No single maturity date |
|
189 |
| Securities with Unrealized Losses, Total |
36,080 |
37,921 |
| All Fixed Maturity Securities, One year or less |
8,791 |
14,305 |
| All Fixed Maturity Securities, After one through five years |
35,028 |
36,555 |
| All Fixed Maturity Securities, After five through ten years |
46,430 |
43,281 |
| All Fixed Maturity Securities, After ten years |
10,751 |
7,675 |
| All Fixed Maturity Securities, No single maturity date |
12,022 |
16,117 |
| All Fixed Maturity Securities, Total |
$ 113,022 |
$ 117,933 |