Reinsurance (Narrative) (Details) - USD ($) $ in Thousands							12 Months Ended			21 Months Ended	24 Months Ended	36 Months Ended			48 Months Ended
	Jul. 01, 2019	Jul. 01, 2017	Jul. 01, 2012	Dec. 31, 2010	Dec. 31, 2009	Jan. 31, 2001	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2016	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2016	Dec. 31, 2013	Dec. 31, 2017	Dec. 31, 2013
Effects of Reinsurance [Line Items]
Ceded Premiums							$ (1,706,364)	$ (1,831,716)	$ (1,854,246)
Ceded Reserve Liabilities under Reinsurance Agreement							$ 419,200
Affiliated Entity | PAR U
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage			95.00%	70.00%
Affiliated Entity | PURC
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage													95.00%	70.00%
Affiliated Entity | PARCC
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage	100.00%				90.00%
Ceded Premiums	$ (476,000)
Ceded Expenses	$ (409,000)
Affiliated Entity | GUL Re
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage		30.00%										95.00%
Affiliated Entity | PAR Term
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage	100.00%															95.00%
Ceded Premiums	$ (150,000)
Ceded Expenses	$ (115,000)
Affiliated Entity | Prudential of Taiwan
Effects of Reinsurance [Line Items]
Related Party Transaction, Term						2 years
Affiliated Entity | Term Re
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage															95.00%
Affiliated Entity | Prudential Insurance
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage							100.00%
Affiliated Entity | DART
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage											95.00%
Affiliated Entity | Union Hamilton Reinsurance, Ltd. | Quote Share Reinsurance
Effects of Reinsurance [Line Items]
Reinsurance Retention Policy, Reinsured Risk, Percentage										50.00%
Reinsurance Retention Policy, Amount Retained							$ 3,300,000