Reinsurance Receivables Table of the Components of Reinsurance Receivables (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Effects of Reinsurance [Line Items]
Prepaid reinsurance premiums:		$ 212,711		$ 296,512
Reinsurance receivables		296,234		352,926
Supplemental Cash Flow Information [Abstract]
Increase (Decrease) in Reinsurance Recoverable		35,185		88,150	$ 6,597
Increase (Decrease) in Other Operating Assets		253		7,427	$ (4,384)
Life (1)
Effects of Reinsurance [Line Items]
Prepaid reinsurance premiums:	[1]	64,621		61,919
Ceded claim reserves:		2,929		2,664
Accident and health (1)
Effects of Reinsurance [Line Items]
Prepaid reinsurance premiums:	[1]	53,999		54,357
Ceded claim reserves:		10,435		8,889
Property (2)
Effects of Reinsurance [Line Items]
Prepaid reinsurance premiums:		94,091	[2]	180,236
Ceded claim reserves:		49,917		30,911
Total ceded claim reserves recoverable
Effects of Reinsurance [Line Items]
Ceded claim reserves:		63,281		42,464
Other reinsurance settlements recoverable
Effects of Reinsurance [Line Items]
Other reinsurance settlements recoverable		20,242		$ 13,950
Reinsurance Contract Cancellation [Member]
Supplemental Cash Flow Information [Abstract]
Increase (Decrease) in Reinsurance Recoverable		(92,854)
Increase (Decrease) in Other Operating Assets		88,857
Increase (Decrease) in Other Operating Liabilities		$ (3,997)

[1] Including policyholder account balances ceded.

[2] Includes a non-cash transaction, as part of a reinsurance contract cancellation, that resulted in a reduction of $92,854 in reinsurance receivable, offset by an increase of $88,857 in assets and a decrease of $3,997 in liabilities.