Related Party Transactions (Affiliated Asset Transfers) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Gibraltar Life Insurance Co Ltd August 16 Sale
Related Party Transaction [Line Items]
Fair Value	$ 11,559
Book Value	11,485
APIC, Net of Tax Increase/(Decrease)	0
Realized Investment Gain/(Loss), Net	48
Derivative Gain/(Loss)	0
Prudential Insurance September 16 Sale
Related Party Transaction [Line Items]
Fair Value	47,066
Book Value	36,639
APIC, Net of Tax Increase/(Decrease)	0
Realized Investment Gain/(Loss), Net	6,777
Derivative Gain/(Loss)	0
Pruco Re September 16 Transfer in
Related Party Transaction [Line Items]
Fair Value	91,586
Book Value	80,732
APIC, Net of Tax Increase/(Decrease)	(7,055)
Realized Investment Gain/(Loss), Net	0
Derivative Gain/(Loss)	$ 0