|
Investments - Realized and Unrealized Gains on Investment (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Dec. 31, 2012
|
|
| Gain (Loss) on Investments [Line Items] | |||||
| Gross gains | $ 0 | $ 9 | $ 3,283 | $ 20 | |
| Gross losses | (53) | (2,948) | (53) | (1,594) | |
| Realized gains (losses), Net | (53) | (2,939) | 3,230 | (1,574) | |
| Proceeds from sales of fixed maturities classified as available-for-sale | 202,486 | 104,125 | |||
| Net unrealized gains | 49,348 | 49,348 | 143,797 | ||
| Deferred income tax expense | (101) | (101) | (132) | ||
| Net unrealized gains, net of deferred income tax | 49,247 | 49,247 | 143,665 | ||
| Change in net unrealized gains, net of deferred income tax | (94,418) | 79,928 | |||
|
Available-for-sale securities [Member]
|
|||||
| Gain (Loss) on Investments [Line Items] | |||||
| Gross gains | 3,112 | ||||
| Gross losses | 0 | ||||
| Realized gains (losses), Net | 3,112 | ||||
| Net unrealized gains | 48,997 | 48,997 | 143,495 | ||
|
Trading Securities and Short Sales [Member]
|
|||||
| Gain (Loss) on Investments [Line Items] | |||||
| Gross gains | 0 | 0 | |||
| Gross losses | (2,948) | (1,593) | |||
| Realized gains (losses), Net | (2,948) | (1,593) | |||
|
Other investments [Member]
|
|||||
| Gain (Loss) on Investments [Line Items] | |||||
| Gross gains | 0 | 9 | 171 | 20 | |
| Gross losses | (53) | 0 | (53) | (1) | |
| Realized gains (losses), Net | (53) | 9 | 118 | 19 | |
| Net unrealized gains | $ 351 | $ 351 | $ 302 | ||