Securities (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Rollforward of the credit losses recognized in earnings
Beginning balance	$ 13,995	$ 14,079	$ 14,050	$ 14,079
Increases to the amount related to the credit loss for which other-than-temporary was previously recognized	0	0	0	0
Reductions for increases in cash flows collected	0	(29)	(55)	(29)
Amounts realized for securities sold during the period	0	0	0	0
Ending balance	$ 13,995	$ 14,050	$ 13,995	$ 14,050