Non Purchased Loans - Changes in Restructured Loans (Details) - Non purchased loans and leases $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($) loan
Changes in restructured loans [Roll Forward]
Totals at January 1, 2017 (loans) | loan	53
Additional loans with concessions (loans) | loan	13
Reclassified as performing (loans) | loan	1
Reclassified as nonperforming (loans) | loan	(5)
Paid in full (loans) | loan	(7)
Charge-offs (loans) | loan	(1)
Principal paydowns (loans) | loan	0
Lapse of concession period (loans) | loan	(1)
Totals at September 30, 2017 (loans) | loan	53
Recorded Investment
Totals at January 1, 2017 | $	$ 7,447
Additional loans with concessions | $	965
Reclassified as performing | $	55
Reclassified as nonperforming | $	(670)
Paid in full | $	(1,086)
Charge-offs | $	(250)
Principal paydowns | $	(238)
Lapse of concession period | $	(923)
Totals at September 30, 2017 | $	$ 5,300