Fair Value of Assets and Liabilities (Changes in Level 3 Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Equity Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, beginning of period (Assets)					$ 192
Included In Earnings
Realized investment gains (losses), net					0
Asset management fees and other income - Assets1					0
Included in other comprehensive income (loss)					0
Net investment income1					0
Purchases					0
Sales					(192)
Issuances					0
Settlements					0
Transfers into Level 3					0	[1]
Transfers out of Level 3					0	[1]
Fair Value, end of period (Assets)	0				0
Included In Earnings
Realized investment gains (losses), net					0	[2]
Asset management fees and other income					0	[2]
Debt Securities [Member] | Corporate Debt Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, beginning of period (Assets)	102,008		96,192		96,796		95,555
Included In Earnings
Realized investment gains (losses), net	149		0		149		49
Asset management fees and other income - Assets1	0		0		0		0
Included in other comprehensive income (loss)	(996)		1,243		(513)		(2,817)
Net investment income1	1,265		1,188		3,738		3,518
Purchases	2,122		0		5,362		1,243
Sales	(202)		0		(202)		0
Issuances	0		0		0		0
Settlements	(400)		(266)		(1,384)		(4,167)
Other			0	[3]			0	[3]
Transfers into Level 3	0	[1]	0	[1]	0	[1]	4,976	[1]
Transfers out of Level 3	0	[1]	(4,522)	[1]	0	[1]	(4,522)	[1]
Fair Value, end of period (Assets)	103,946		93,835		103,946		93,835
Included In Earnings
Realized investment gains (losses), net	0	[2]	0	[2]	0	[2]	0	[2]
Asset management fees and other income	0	[2]	0	[2]	0	[2]	0	[2]
Debt Securities [Member] | Asset-backed Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, beginning of period (Assets)	74,301		86,086		63,789		69,298
Included In Earnings
Realized investment gains (losses), net	0		0		0		0
Asset management fees and other income - Assets1	0		0		0		0
Included in other comprehensive income (loss)	94		(226)		394		(215)
Net investment income1	28		88		110		404
Purchases	0		0		14,933		25,980
Sales	0		0		0		0
Issuances	0		0		0		0
Settlements	(10,260)		(2,310)		(39,600)		(11,829)
Other			(2,996)	[3]			(2,996)	[3]
Transfers into Level 3	0	[1]	0	[1]	28,152	[1]	0	[1]
Transfers out of Level 3	(1,263)	[1]	0	[1]	(4,878)	[1]	0	[1]
Fair Value, end of period (Assets)	62,900		80,642		62,900		80,642
Included In Earnings
Realized investment gains (losses), net	0	[2]	0	[2]	0	[2]	0	[2]
Asset management fees and other income	0	[2]	0	[2]	0	[2]	0	[2]
Debt Securities [Member] | Commercial Mortgage Backed Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, beginning of period (Assets)	0		0		0		0
Included In Earnings
Realized investment gains (losses), net	0		0		0		0
Asset management fees and other income - Assets1	0		0		0		0
Included in other comprehensive income (loss)	0		1		(83)		18
Net investment income1	0		0		0		0
Purchases	7,070		0		52,518		17,169
Sales	0		8,079		0		0
Issuances	0		0		0		0
Settlements	0		0		0		0
Other			0	[3]			0	[3]
Transfers into Level 3	0	[1]	0	[1]	0	[1]	0	[1]
Transfers out of Level 3	0	[1]	0	[1]	(45,365)	[1]	(9,107)	[1]
Fair Value, end of period (Assets)	7,070		8,080		7,070		8,080
Included In Earnings
Realized investment gains (losses), net	0	[2]	0	[2]	0	[2]	0	[2]
Asset management fees and other income	0	[2]	0	[2]	0	[2]	0	[2]
Other Long-term Investments [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, beginning of period (Assets)	536		407		486		1,054
Included In Earnings
Realized investment gains (losses), net	0		(19)		0		(740)
Asset management fees and other income - Assets1	(17)		14		(19)		51
Included in other comprehensive income (loss)	0		0		0		0
Net investment income1	0		0		0		0
Purchases	109		75		166		112
Sales	0		0		0		0
Issuances	0		0		0		0
Settlements	0		0		(5)		0
Other			0	[3]			0	[3]
Transfers into Level 3	0	[1]	0	[1]	0	[1]	0	[1]
Transfers out of Level 3	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, end of period (Assets)	628		477		628		477
Included In Earnings
Realized investment gains (losses), net	0	[2]	721	[2]	0	[2]	0	[2]
Asset management fees and other income	(17)	[2]	14	[2]	(19)	[2]	51	[2]
Trading Asset [Member] | Equity Securities [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, beginning of period (Assets)			279		313		207
Included In Earnings
Realized investment gains (losses), net			0		0		0
Asset management fees and other income - Assets1			6		15		78
Included in other comprehensive income (loss)			0		0		0
Net investment income1			0		0		0
Purchases					0		0
Sales			0		0		0
Issuances			0		0		0
Settlements			0		(328)		0
Other			0	[3]			0	[3]
Transfers into Level 3			0	[1]	0	[1]	0	[1]
Transfers out of Level 3			0	[1]	0	[1]	0	[1]
Fair Value, end of period (Assets)	0		285		0		285
Included In Earnings
Realized investment gains (losses), net			0	[2]	0	[2]	0	[2]
Asset management fees and other income			7	[2]	15	[2]	79	[2]
Other Assets [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, beginning of period (Assets)							1,995
Included In Earnings
Realized investment gains (losses), net							0
Realized investment gains (losses), net							0
Included in other comprehensive income (loss)							40
Net investment income1							0
Purchases							6,250
Sales							(2,996)
Issuances							0
Settlements							0
Other							2,996	[3]
Transfers into Level 3							0	[1]
Transfers out of Level 3							0	[1]
Fair Value, end of period (Assets)			8,285				8,285
Included In Earnings
Realized investment gains (losses), net							0	[2]
Asset management fees and other income							0	[2]
Future Policy Benefits [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, beginning of period (Assets)	(1,662,957)		(669,989)
Fair Value, Beginning of period (Liabilities)					778,226		1,793,136
Included In Earnings
Realized investment gains (losses), net	(592,334)		(572,570)				674,014
Realized investment gains (losses), net					(1,353,916)		0
Asset management fees and other income - Liabilities			0		0
Asset management fees and other income - Assets1	0
Included in other comprehensive income (loss)	0		0		0		0
Net investment income1	0		0		0		0
Purchases	0		0		0		0
Sales	0		0		0		0
Issuances	(61,450)		(61,788)		(184,599)		(185,225)
Settlements	0		0		0		0
Other			0	[3]			0	[3]
Transfers into Level 3	0	[1]	0	[1]	0	[1]	0	[1]
Transfers out of Level 3	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, end of period (Assets)	(2,316,741)		(1,304,347)		(2,316,741)		(1,304,347)
Fair Value, End of Period (Liabilities)	2,316,741				2,316,741
Included In Earnings
Realized investment gains (losses), net	(606,724)	[2]	(577,920)	[2]	(1,374,751)	[2]	636,071	[2]
Asset management fees and other income	0	[2]	0	[2]	0	[2]	0	[2]
Cash and Cash Equivalents [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, beginning of period (Assets)	400				0
Included In Earnings
Realized investment gains (losses), net	0				0
Asset management fees and other income - Assets1	0				0
Included in other comprehensive income (loss)	0				0
Net investment income1	0				0
Purchases	0				400
Sales	0				0
Issuances	0				0
Settlements	0				0
Transfers into Level 3	0	[1]			0	[1]
Transfers out of Level 3	0	[1]			0	[1]
Fair Value, end of period (Assets)	400				400
Included In Earnings
Realized investment gains (losses), net	0	[2]			0	[2]
Asset management fees and other income	0	[2]			0	[2]
Reinsurance Recoverable [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, beginning of period (Assets)	1,594,311		654,058		748,005		1,732,094
Included In Earnings
Realized investment gains (losses), net	578,588		539,919		1,307,462		(655,869)
Asset management fees and other income - Liabilities			0				0
Asset management fees and other income - Assets1	0				0
Included in other comprehensive income (loss)	0		0		0		0
Net investment income1	0		0		0		0
Purchases	58,581		58,928		176,013		176,680
Sales	0		0		0		0
Issuances	0		0		0		0
Settlements	0		0		0		0
Other			0	[3]			0	[3]
Transfers into Level 3	0	[1]	0	[1]	0	[1]	0	[1]
Transfers out of Level 3	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, end of period (Assets)	2,231,480		1,252,905		2,231,480		1,252,905
Included In Earnings
Realized investment gains (losses), net	592,438	[2]	545,040	[2]	1,327,516	[2]	(618,782)	[2]
Asset management fees and other income	0	[2]	0	[2]	0	[2]	0	[2]
Receivables From Parents And Affiliates [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, beginning of period (Assets)	27,762		5,250		6,347
Included In Earnings
Realized investment gains (losses), net	(1)		0		0
Asset management fees and other income - Liabilities			0		0
Asset management fees and other income - Assets1	0
Included in other comprehensive income (loss)	(292)		39		(213)
Net investment income1	0		0		0
Purchases	0		2,996		19,350
Sales	0		(2,996)		0
Issuances	0		0		0
Settlements	0		0		0
Other			2,996	[3]
Transfers into Level 3	0	[1]	0	[1]	1,985	[1]
Transfers out of Level 3	(4,943)	[1]	0	[1]	(4,943)	[1]
Fair Value, end of period (Assets)	22,526		8,285		22,526		8,285
Included In Earnings
Realized investment gains (losses), net	0	[2]	0	[2]	0	[2]
Asset management fees and other income	$ 0	[2]	$ 0	[2]	$ 0	[2]

[1]   (1) Transfers into or out of Level 3 are reported as the value as of the beginning of the quarter in which the transfer occurs.

[2] (2) Unrealized gains or losses related to assets still held at the end of the period do not include amortization or accretion of premiums and discounts.

[3] (3) Other primarily represents reclasses of certain assets between reporting categories.