Purchased Loans - Changes in Restructured Loans (Details) - Purchased loans $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018 USD ($) loan	Jun. 30, 2018 USD ($) loan
Number of Loans
Totals at January 1, 2018 (loans) | loan		68
Additional loans with concessions (loans) | loan		3
Reclassified as performing restructured loan (loan) | loan		2
Reclassified to nonperforming loans (loans) | loan	(4)
Paid in full (loans) | loan		(1)
Principal paydowns (loans) | loan		0
Totals at March 30, 2018 (loans) | loan	68	68
Recorded Investment
Totals at January 1, 2018 | $		$ 8,965
Additional loans with concessions | $		132
Reclassified as performing restructured loan | $		23
Reclassified to nonperforming loans | $	$ (425)
Paid in full | $		(76)
Principal paydowns | $		(486)
Totals at June 30, 2018 | $	$ 8,133	$ 8,133