Fair Value of Assets and Liabilities (Changes in Level 3 Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 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				$ 192
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				0
Sales	(192)				(192)
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)	0				0
Included In Earnings
Realized investment gains (losses), net	0	[2]			0	[2]
Asset management fees and other income	0	[2]			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)	99,255		95,575		96,796		95,555
Included In Earnings
Realized investment gains (losses), net	0		45		0		49
Asset management fees and other income - Assets1	0		0		0		0
Included in other comprehensive income (loss)	236		(3,789)		483		(4,060)
Net investment income1	1,249		1,176		2,473		2,330
Purchases	1,751		643		3,240		1,243
Sales	0		0		0		0
Issuances	0		0		0		0
Settlements	(483)		(2,434)		(984)		(3,901)
Transfers into Level 3	0	[1]	4,976	[1]	0	[1]	4,976	[1]
Transfers out of Level 3	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, end of period (Assets)	102,008		96,192		102,008		96,192
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)	102,725		72,740		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)	122		(151)		300		11
Net investment income1	38		181		82		316
Purchases	0		18,922		14,933		25,980
Sales	0		0		0		0
Issuances	0		0		0		0
Settlements	(25,458)		(5,606)		(29,340)		(9,519)
Transfers into Level 3	489	[1]	0	[1]	28,152	[1]	0	[1]
Transfers out of Level 3	(3,615)	[1]	0	[1]	(3,615)	[1]	0	[1]
Fair Value, end of period (Assets)	74,301		86,086		74,301		86,086
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)	45,365		9,106		0		0
Included In Earnings
Realized investment gains (losses), net	0		1		0		0
Asset management fees and other income - Assets1	0		0		0		0
Included in other comprehensive income (loss)	0		0		(83)		0
Net investment income1	0		0		0		17
Purchases	0		0		45,448		9,090
Sales	0		0		0		0
Issuances	0		0		0		0
Settlements	0		0		0		0
Transfers into Level 3	0	[1]	0	[1]	0	[1]	0	[1]
Transfers out of Level 3	(45,365)	[1]	(9,107)	[1]	(45,365)	[1]	(9,107)	[1]
Fair Value, end of period (Assets)	0		0		0		0
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)	520		463		486		1,054
Included In Earnings
Realized investment gains (losses), net	0		(97)		0		(721)
Asset management fees and other income - Assets1	7		4		(2)		37
Included in other comprehensive income (loss)	0		0		0		0
Net investment income1	0		0		0		0
Purchases	14		37		57		37
Sales	0		0		0		0
Issuances	0		0		0		0
Settlements	(5)		0		(5)		0
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)	536		407		536		407
Included In Earnings
Realized investment gains (losses), net	0	[2]	(97)	[2]	0	[2]	(721)	[2]
Asset management fees and other income	0	[2]	4	[2]	0	[2]	37	[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)	328		267		313		207
Included In Earnings
Realized investment gains (losses), net	0		0		0		0
Asset management fees and other income - Assets1	0		12		15		72
Included in other comprehensive income (loss)	0		0		0		0
Net investment income1	0		0		0		0
Purchases	0				0		0
Sales	0		0		0		0
Issuances	0		0		0		0
Settlements	(328)		0		(328)		0
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)	0		279		0		279
Included In Earnings
Realized investment gains (losses), net	0	[2]	0	[2]	0	[2]	0	[2]
Asset management fees and other income	0	[2]	11	[2]	15	[2]	72	[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)							1
Net investment income1							0
Purchases							3,254
Sales							0
Issuances							0
Settlements							0
Transfers into Level 3							0	[1]
Transfers out of Level 3							0	[1]
Fair Value, end of period (Assets)			5,250				5,250
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)	(1,402,029)		(1,230,323)
Fair Value, Beginning of period (Liabilities)					778,226		1,793,136
Included In Earnings
Realized investment gains (losses), net	(199,363)		622,798				1,246,584
Realized investment gains (losses), net					(761,582)		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	(61,565)		(62,464)		(123,149)		(123,437)
Settlements	0		0		0		0
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)	(1,662,957)		(669,989)		(1,662,957)		(669,989)
Fair Value, End of Period (Liabilities)	1,662,957				1,662,957
Included In Earnings
Realized investment gains (losses), net	(213,148)	[2]	614,035	[2]	(782,440)	[2]	1,223,615	[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)	1,344,587		1,191,409		748,005		1,732,094
Included In Earnings
Realized investment gains (losses), net	191,020		(596,967)		728,874		(1,195,788)
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	58,704		59,616		117,432		117,752
Sales	0		0		0		0
Issuances	0		0		0		0
Settlements	0		0		0		0
Transfers into Level 3	0	[1]	0	[1]	0	[1]		[1]
Transfers out of Level 3	0	[1]	0	[1]	0	[1]	0	[1]
Fair Value, end of period (Assets)	1,594,311		654,058		1,594,311		654,058
Included In Earnings
Realized investment gains (losses), net	204,298	[2]	(588,372)	[2]	749,020	[2]	(1,173,117)	[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)	8,344		2,000		6,347
Included In Earnings
Realized investment gains (losses), net	0		0		1
Asset management fees and other income - Liabilities			0		0
Asset management fees and other income - Assets1	0
Included in other comprehensive income (loss)	68		(4)		79
Net investment income1	19,350		0		0
Purchases	0		3,254		19,350
Sales	0		0		0
Issuances	0		0		0
Settlements	0		0		0
Transfers into Level 3	0	[1]	0	[1]	1,985	[1]
Transfers out of Level 3	0	[1]	0	[1]	0	[1]
Fair Value, end of period (Assets)	27,762		5,250		27,762		5,250
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.