Investments (Securities Gains (Losses)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Investments [Abstract]
Gross gains on sales of investment securities available for sale	$ 5,564	$ 0	$ 10,850	$ 0
Gross losses on sales of investment securities available for sale	0	0	(13)	0
Total securities gains (losses)	$ 5,564	$ 0	$ 10,837	$ 0