Loans (Details 5) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual loans	$ 27,925	$ 30,715
Loans over 90 days past due and still accruing	0	0
Total non-performing loans	27,925	30,715
Real estate and other assets held for sale	1,440	1,532
Total non-performing assets	29,365	32,247
Troubled debt restructuring, still accruing	$ 13,722	$ 13,770