Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)	$ 16,557	$ 20,429	$ 34,301
Deferred Federal Income Tax Expense (Benefit)	6,876	(4,953)	(73,094)
Affordable Housing Tax Credits and Other Tax Benefits, Amount	(3,504)	(3,826)	(1,190)
Income Tax Expense (Benefit)	19,929	11,650	(39,983)
Tax impact of Income from Equity Method Investments	919	1,179	1,394
Income Tax Effects Allocated Directly to Equity [Abstract]
Change in net unrealized investment gains/losses - deferred, Tax	70,048	(50,025)	43,448
Total tax from all sources provided in our financial statements	$ 90,896	$ (37,196)	$ 4,859