Off-Balance Sheet Arrangements, Commitments And Contingencies - Litigation (Details) $ in Thousands	Sep. 30, 2017 USD ($)
Financial instruments with off-balance sheet risk
1 year of less	$ 329,169
More than 1 year but less than 3 years	184,349
3 years or more but less than 5 years	64,808
5 years or more	51,453
Total	629,779
Commitments to Extend Credit [Member]
Financial instruments with off-balance sheet risk
1 year of less	319,979
More than 1 year but less than 3 years	181,895
3 years or more but less than 5 years	64,645
5 years or more	50,813
Total	617,332
Unused lines of Credit [Member]
Financial instruments with off-balance sheet risk
1 year of less	9,190
More than 1 year but less than 3 years	2,454
3 years or more but less than 5 years	163
5 years or more	640
Total	$ 12,447