Contingencies (Estimated Cost To Replace Annuities For Contingent Liability) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
The Prudential Insurance Company [Member]
Loss Contingencies [Line Items]
Estimated cost to replace annuities	$ 144,117	$ 143,447
Unaffiliated Life Insurance Company [Member]
Loss Contingencies [Line Items]
Estimated cost to replace annuities	$ 28,562	$ 27,634