Unpaid Loss and Loss Adjustment Expenses Property and Casualty (tables) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Liability for Claims and Claims Adjustment Expense [Line Items]
Property and casualty	$ 45,874	$ 52,195	$ 53,795
Balance at end of period, gross	45,874	52,195
Property, Liability and Casualty Insurance Product Line [Member]
Liability for Claims and Claims Adjustment Expense [Line Items]
Property and casualty			53,795	$ 55,471
Less reinsurance recoverable related to property and casualty unpaid loss and loss adjustment expenses	509	845
Balance at beginning of period, net	45,365	51,350
Current year	50,324	45,614
Prior years	996	67
Current year	23,094	22,060
Prior years	35,975	26,535
Balance at end of period, net	45,365	51,350	53,114	54,264
Plus reinsurance recoverable related to property and casualty unpaid loss and loss adjustment expenses	$ 509	$ 845	$ 681	$ 1,207