Income Taxes (Net Deferred Income Tax Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Loss reserve	$ 146,781	$ 159,320
Alternative minimum tax credits	93,336	64,088
Foreign tax credits	74,255	90,941
Unearned premium reserve	45,368	37,558
Deferred gain on reinsurance	29,965	30,265
Net unrecognized losses on benefit plans	20,944	33,660
Benefit plan liabilities	7,968	37,598
Uncollectible reinsurance reserve	5,534	5,675
Deferred compensation	2,847	6,690
Deferred expenses	2,695	2,602
Investment impairments	2,344	3,009
Net operating loss carryforward		64,353
Other assets	9,732	10,646
Total deferred tax assets	441,769	546,405
Net fair value income	350,747	139,374
Deferred acquisition costs	39,344	33,969
Net unrealized investment gains	38,750	84,934
Net unrealized foreign currency gains	27,735	42,747
Gain on tender of debt	27,395	27,395
Bond market discount	1,629	3,050
Other liabilities	7,458	761
Total deferred tax liabilities	493,058	332,230
Net deferred tax assets/(liabilities)	$ (51,289)	$ 214,175