Property and Casualty Unpaid Claims and Claim Expenses (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Gross reserves, beginning of year		$ 323,720
Less: reinsurance recoverables		60,112
Claims and claim expense payments for claims occurring during:
Plus: reinsurance recoverables		70,474		$ 60,112
Gross reserves, end of year		329,888	[1]	323,720
Property, Liability and Casualty Insurance Product Line [Member]
Gross reserves, beginning of year	[2]	301,569		311,097	$ 275,809
Less: reinsurance recoverables		50,332		43,740	14,107
Net reserves, beginning of year	[3]	251,237		267,357	261,702
Incurred claims and claim expenses:
Claims occurring in the current year		471,099		432,811	416,512
Decrease in estimated reserves for claims occurring in prior years	[4]	(7,000)		(12,500)	(17,000)
Total claims and claim expenses incurred	[5]	464,099		420,311	399,512
Claims and claim expense payments for claims occurring during:
Current year		323,025		294,449	273,699
Prior years		145,753		141,982	120,158
Total claims and claim expense payments		468,778		436,431	393,857
Net reserves, end of year	[3]	246,558		251,237	267,357
Plus: reinsurance recoverables		61,199		50,332	43,740
Gross reserves, end of year	[2]	$ 307,757		$ 301,569	$ 311,097

[1] This line includes Retirement and Life reserves as included in the Consolidated Balance Sheet.

[2] Unpaid claims and claim expenses as reported in the Consolidated Balance Sheets also include reserves for the Life and Retirement segments of $22,131, $22,151 and $14,687 as of December 31, 2016, 2015 and 2014, respectively, in addition to Property and Casualty segment reserves.

[3] Reserves net of anticipated reinsurance recoverables.

[4] Shows the amounts by which the Company decreased its reserves in each of the periods indicated for claims occurring in previous periods to reflect subsequent information on such claims and changes in their projected final settlement costs. Also refer to the paragraphs below for additional information regarding the reserve development recorded in 2016, 2015 and 2014.

[5] Benefits, claims and settlement expenses as reported in the Consolidated Statements of Operations also include amounts for the Life and Retirement segments of $76,905, $76,053 and $68,914 for the years ended December 31, 2016, 2015 and 2014, respectively, in addition to the Property and Casualty segment amounts.