Off-Balance Sheet Arrangements, Commitments And Contingencies - Litigation (Details) $ in Thousands	Mar. 31, 2017 USD ($)
Financial instruments with off-balance sheet risk
1 year of less	$ 376,024
More than 1 year but less than 3 years	217,530
3 years or more but less than 5 years	70,095
5 years or more	55,559
Total	719,208
Commitments to Extend Credit [Member]
Financial instruments with off-balance sheet risk
1 year of less	367,322
More than 1 year but less than 3 years	215,840
3 years or more but less than 5 years	69,932
5 years or more	54,759
Total	707,853
Unused lines of Credit [Member]
Financial instruments with off-balance sheet risk
1 year of less	8,702
More than 1 year but less than 3 years	1,690
3 years or more but less than 5 years	163
5 years or more	800
Total	$ 11,355