|
Separate Accounts - Additional Information (Details) (USD $)
|
Jun. 30, 2014
|
Dec. 31, 2013
|
Jun. 30, 2014
Reinsurance Transaction [Member]
|
Apr. 30, 2013
Reinsurance Transaction [Member]
|
Jun. 30, 2014
Guaranteed minimum withdrawal benefit
|
Dec. 31, 2013
Guaranteed minimum withdrawal benefit
|
|---|---|---|---|---|---|---|
| Net Amount at Risk by Product and Guarantee [Line Items] | ||||||
| Value of variable annuity separate accounts | $ 133,600,000 | $ 123,900,000 | ||||
| Separate accounts guarantee liability | (3,600,000) | (4,700,000) | ||||
| Modified Coinsurance Transaction Separate Account Fund Balances | 324,000,000 | |||||
| Fund value | 2,091,954,000 | 2,096,212,000 | 25,900,000 | 23,600,000 | ||
| Future policy benefits | $ 926,526,000 | $ 910,228,000 | $ 600,000 | $ 600,000 |