Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Less reclassification adjustments:
Net realized investment gains (losses), excluding impairment losses, Before-Tax Amount	$ 412	$ 2,013	$ 880	$ 3,133
Net realized investment gains (losses), excluding impairment losses, Tax (Expense) or Benefit	144	705	308	1,097
Net realized investment gains (losses), excluding impairment losses, Net-of-Tax Amount	268	1,308	572	2,036
Other-than-temporary impairment losses recognized in earnings, Before-Tax Amount	(188)	(238)	(456)	(507)
Other-than-temporary impairment losses recognized in earnings, Tax (Expense) or Benefit	(66)	(83)	(160)	177
Other-than-temporary impairment losses recognized in earnings, Net-of-Tax Amount	122	155	296	(330)
Other-than-temporary impairment losses recognized in other comprehensive income, Before-Tax Amount	42	56	150	114
Other-than-temporary impairment losses recognized in other comprehensive income, Tax (Expense) or Benefit	15	20	53	40
Other-than-temporary impairment losses recognized in other comprehensive income, Net-of-Tax Amount	27	36	97	74
Net unrealized gains (losses) excluding impairment losses, Before-Tax Amount	31,954	37,360	38,972	36,333
Net unrealized gains (losses) excluding impairment losses, Tax (Expense) or Benefit	11,184	13,075	13,640	12,716
Net unrealized gains (losses) excluding impairment losses, Net-of-Tax Amount	20,770	24,285	25,332	23,617
Effect on DAC and VOBA, Before-Tax Amount	(7,454)	(6,897)	(11,254)	(6,830)
Effect on DAC and VOBA, Tax (Expense) or Benefit	(2,609)	(2,414)	(3,939)	(2,391)
Effect on DAC and VOBA, Net-of-Tax Amount	(4,845)	(4,483)	(7,315)	(4,439)
Future policy benefits, Before-Tax Amount	(5,389)	(4,502)	(7,645)	(3,395)
Future policy benefits, Tax (Expense) or Benefit	(1,887)	(1,576)	(2,676)	(1,189)
Future policy benefits, Net-of-Tax Amount	(3,502)	(2,926)	(4,969)	(2,206)
Policyholder account balances, Before-Tax Amount	(219)	(127)	(335)	(117)
Policyholder account balances, Tax (Expense) or Benefit	(76)	(44)	(117)	(40)
Policyholder account balances, Net-of-Tax Amount	(143)	(83)	(218)	(77)
Other comprehensive income, Before-Tax Amount	18,892	25,834	19,738	25,991
Other comprehensive income, Tax (Expense) or Benefit	6,612	9,041	6,908	9,096
Other comprehensive income, Net-of-Tax Amount	12,280	16,793	12,830	16,895
Net income	8,397	11,173	27,838	15,964
COMPREHENSIVE INCOME	20,677	27,966	40,668	32,859
Fixed maturity securities [Member]
Net unrealized gains (losses) arising during the year
Net unrealized gains (losses), Before-Tax Amount	32,275	39,150	39,599	39,004
Net unrealized gains (losses), Tax (Expense) or Benefit	11,297	13,703	13,860	13,652
Net unrealized gains (losses), Net-of-Tax Amount	20,978	25,447	25,739	25,352
Equity securities [Member]
Net unrealized gains (losses) arising during the year
Net unrealized gains (losses), Before-Tax Amount	(55)	41	(53)	69
Net unrealized gains (losses), Tax (Expense) or Benefit	(20)	14	(19)	24
Net unrealized gains (losses), Net-of-Tax Amount	$ (35)	$ 27	$ (34)	$ 45