Income Taxes (Net Deferred Income Tax Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Loss reserve	$ 169,771	$ 153,978
Unearned premium reserve	40,624	44,582
Net unrecognized losses on benefit plans	33,971	40,377
Investment impairments	23,481	13,841
Benefit plan liability	18,747	9,873
Foreign tax credits	11,836	64,902
Alternative minimum tax credits	7,604	44,954
Uncollectible reinsurance reserve	5,534	5,237
Net operating loss carryforward	3,412	3,296
Deferred expenses	3,182	3,076
Other assets	16,663	21,048
Total deferred tax assets	334,825	405,164
Net fair value income	80,268	128,856
Deferred acquisition costs	33,227	38,636
Gain on tender of debt	16,437	21,916
Net unrealized investment gains	7,491	28,108
Other liabilities	15,960	15,379
Total deferred tax liabilities	153,383	232,895
Net deferred tax assets	181,442	172,269
Valuation allowance	(3,412)	(3,296)
Total net deferred tax assets	$ 178,030	$ 168,973