Loans Loans (Activity for Related Party Loans of $60,000 or More) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Loans and Leases Receivable, Related Parties [Roll Forward]
Balance, beginning	$ 45,164	$ 22,974
Additions	13,497	33,004
Amounts collected	(11,802)	(12,318)
Other changes, net	(1,161)	1,504
Balance, ending	$ 45,698	$ 45,164