Property and Casualty Unpaid Claims and Claim Expenses (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Gross reserves, beginning of year		$ 329,888
Claims and claim expense payments for claims occurring during:
Gross reserves, end of year		340,033
Property, Liability and Casualty Insurance Product Line [Member]
Gross reserves, beginning of year	[1]	307,757	$ 301,569
Less: reinsurance recoverables		61,199	50,332
Net reserves, beginning of year	[2]	246,558	251,237
Incurred claims and claim expenses:
Claims occurring in the current year		123,204	103,206
Decrease in estimated reserves for claims occurring in prior years	[3]	(1,000)	(2,000)
Total claims and claim expenses incurred	[4]	122,204	101,206
Claims and claim expense payments for claims occurring during:
Current year		52,380	39,081
Prior years		62,013	54,515
Total claims and claim expense payments		114,393	93,596
Net reserves, end of year	[2]	254,369	258,847
Plus: reinsurance recoverables		61,804	60,429
Gross reserves, end of year	[1]	$ 316,173	$ 319,276

[1] Unpaid claims and claim expenses as reported in the Consolidated Balance Sheets also include reserves for the Life and Retirement segments of $23,860 and $24,993 as of March 31, 2017 and 2016, respectively, in addition to Property and Casualty segment reserves.

[2] Reserves net of anticipated reinsurance recoverables.

[3] 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.

[4] Benefits, claims and settlement expenses as reported in the Consolidated Statements of Operations also include amounts for the Life and Retirement segments of $21,892 and $18,307 as of March 31, 2017 and 2016, respectively, in addition to the Property and Casualty segment amounts.