Balance Sheet Offsetting (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Other assets [Member]
Gross derivative positions	$ 7,266	$ 7,812
Offsetting derivative positions	4,515	5,642
Net amounts presented in balance sheet	2,751	2,170
Cash collateral pledged	0	0
Net amount	2,751	2,170
Other assets [Member] | Interest rate caps [Member]
Gross derivative positions	44	134
Offsetting derivative positions	0	0
Net amounts presented in balance sheet	44	134
Cash collateral pledged	0	0
Net amount	44	134
Other assets [Member] | Interest rate floors [Member]
Gross derivative positions	389
Offsetting derivative positions	0
Net amounts presented in balance sheet	389
Cash collateral pledged	0
Net amount	389
Other assets [Member] | Interest rate swaps with customers [Member]
Gross derivative positions	4,620	4,920
Offsetting derivative positions	2,302	2,884
Net amounts presented in balance sheet	2,318	2,036
Cash collateral pledged	0	0
Net amount	2,318	2,036
Other assets [Member] | Mirror swaps with counterparties [Member]
Gross derivative positions	2,213	2,758
Offsetting derivative positions	2,213	2,758
Net amounts presented in balance sheet	0	0
Cash collateral pledged	0	0
Net amount	0	0
Other liabilities [Member]
Gross derivative positions	7,498	8,248
Offsetting derivative positions	4,515	5,642
Net amounts presented in balance sheet	2,983	2,606
Cash collateral pledged	2,983	1,428
Net amount	0	1,178
Other liabilities [Member] | Interest rate swaps with customers [Member]
Gross derivative positions	2,302	2,884
Offsetting derivative positions	2,302	2,884
Net amounts presented in balance sheet	0	0
Cash collateral pledged	0	0
Net amount	0	0
Other liabilities [Member] | Mirror swaps with counterparties [Member]
Gross derivative positions	4,659	4,986
Offsetting derivative positions	2,213	2,758
Net amounts presented in balance sheet	2,446	2,228
Cash collateral pledged	2,446	1,295
Net amount	0	933
Other liabilities [Member] | Interest rate swaps [Member]
Gross derivative positions	537	378
Offsetting derivative positions	0	0
Net amounts presented in balance sheet	537	378
Cash collateral pledged	537	133
Net amount	$ 0	$ 245