Reinsurance and Policy Benefits and Losses Claims and Loss Expenses Payable (Policy Benefits and Losses, Claims and Loss Expenses Payable for Property and Casualty Insurance) (Details) - USD ($) $ in Thousands	Mar. 31, 2016		Dec. 31, 2015	Mar. 31, 2015		Dec. 31, 2014
Reinsurance:
Total	$ 1,071,412			$ 1,062,188
Operating Segments [Member] | Property and Casualty Insurance [Member]
Reinsurance:
Unpaid losses and loss adjustment expense			$ 251,964			$ 271,609
Reinsurance losses payable			855			135
Total	$ 252,819	[1]	$ 271,744	$ 271,744	[2]	$ 295,216

[1] Balances as of December 31, 2015

[2] Balances as of December 31, 2014