Purchased Loans (Details 4) - Purchased $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) loan	Dec. 31, 2015 USD ($) loan
Number of Loans
Beginning balance (loans) | loan	26	4
Additional loans with concessions (loans) | loan	25	23
Reclassified as nonperforming (loans) | loan	(4)	(1)
Paid in full (loans) | loan	(5)	0
Charge-offs (loans) | loan	0	0
Transfer to other real estate owned (loans) | loan	0	0
Principal paydowns (loans) | loan	0	0
Lapse of concession period (loans) | loan	0	0
TDR reclassified as performing loan (loans) | loan	0	0
Ending balance (loans) | loan	42	26
Recorded Investment
Beginning balance | $	$ 3,201	$ 458
Additional loans with concessions | $	2,472	3,341
Reclassified as nonperforming | $	(216)	(275)
Paid in full | $	(1,297)	0
Charge-offs | $	0	0
Transfer to other real estate owned | $	0	0
Principal paydowns | $	(132)	(323)
Lapse of concession period | $	0	0
TDR reclassified as performing loan | $	0	0
Ending balance | $	$ 4,028	$ 3,201