Income Taxes Reconciliation of Expected Federal Tax Expense to Actual (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Expected Tax Expense									$ 1,186	$ 420	$ (1,045)
Expected tax expense (benefit), percent									21.00%	21.00%	35.00%
Foreign income tax differential									$ (1,562)	$ (8,133)	$ 0
Foreign income tax differential, percent									(27.70%)	(406.30%)	0.00%
Tax-exempt interest and dividends-received deductions									$ (145)	$ (227)	$ (360)
Tax-exempt interest and dividends-received deductions, percent									(2.60%)	(11.30%)	12.10%
Adjustment of prior year income taxes									$ (99)	$ 113	$ 68
Adjustment of prior year income taxes, percent									(1.80%)	5.60%	(2.30%)
Effect of graduated rates									$ 0	$ 0	$ (140)
Effect of graduated rates, percent									0.00%	0.00%	4.70%
Effect of uncertain tax position									$ 1,148	$ 2,612	$ (355)
Effect of uncertain tax position, percent									20.30%	130.50%	11.90%
Nondeductible costs to remediate tax compliance issue									$ (27)	$ (366)	$ (384)
Nondeductible costs to remediate tax compliance issue, percent									(0.50%)	(18.30%)	12.90%
Federal Income Tax Rate Reconciliation, 162(m) Compensation Limitation									$ 480	$ 53	$ 0
Federal Income Tax Rate Reconciliation, 162(m) Compensation Limitation, Percent									8.50%	2.60%	0.00%
Subpart F Income									$ 5,853	$ 18,403	$ 0
Subpart F Income, Percent									103.60%	919.20%	0.00%
Tax reform re-measurement									$ 0	$ 68	$ 35,718
Tax reform re-measurement, percent									0.00%	3.40%	(1196.20%)
Goodwill impairment									$ 0	$ 0	$ 1,621
Goodwill impairment, percent									0.00%	0.00%	(54.30%)
Other Reconciling Items									$ 281	$ 121	$ 18
Other reconciling items, percent									5.20%	6.20%	(0.60%)
Federal income tax expense	$ (23)	$ 86	$ 1,242	$ 5,810	$ (596)	$ 12,671	$ (1,553)	$ 2,542	$ 7,115	$ 13,064	$ 35,141
Effective Income Tax Rate Reconciliation, Percent									126.00%	652.60%	(1176.80%)