Loans - Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Movement Schedule Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	$ 14,474	$ 4,045	$ 15,623	$ 6,871
Accretion	(2,183)	(642)	(6,927)	(2,412)
Adjustment for payoffs	(840)	(198)	(2,559)	(1,232)
Adjustment for charge-offs	(122)	0	(1,046)	0
Adjustment for pool excess recovery	(123)	0	(123)	(222)
Increase/(decrease) in accretable yield	4,062	(2)	10,721	112
Disposals	0	0	(240)	0
Other	0	0	(181)	86
Balance, end of period	$ 15,268	$ 3,203	$ 15,268	$ 3,203