Equity (Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance			$ 85,635
Income tax benefit (expense)	$ (20,470)	$ (9,715)	(16,066)	$ (19,501)
Ending Balance	146,069		146,069
Foreign Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance			(981)	(989)
Change in OCI before reclassifications			41	4
Amounts reclassified from AOCI			0	0
Income tax benefit (expense)			(9)	(1)
Ending Balance	(949)	(986)	(949)	(986)
Net Unrealized Investment Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance			86,616	(13,378)
Change in OCI before reclassifications			77,489	88,557
Amounts reclassified from AOCI			(1,030)	4,304
Income tax benefit (expense)			(16,057)	(19,500)
Ending Balance	147,018	59,983	147,018	59,983
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance			85,635	(14,367)
Change in OCI before reclassifications			77,530	88,561
Amounts reclassified from AOCI			(1,030)	4,304
Income tax benefit (expense)			(16,066)	(19,501)
Ending Balance	146,069	58,997	146,069	58,997
Cash flow hedges | Net Unrealized Investment Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance			3,000	2,000
Ending Balance	$ 14,000	$ 3,000	$ 14,000	$ 3,000