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Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Troubled Debt Restructurings by Modification Type) (Details) $ in Thousands	Mar. 31, 2017 USD ($) securities loans	Dec. 31, 2016 USD ($) securities loans
Troubled debt restructurings
Number of Loans | loans	28	30
Recorded Investment	$ 13,110	$ 13,560
Commercial and industrial
Troubled debt restructurings
Number of Loans | loans	10	10
Recorded Investment	$ 7,053	$ 7,058
Extension of term | Commercial real estate:
Troubled debt restructurings
Number of Loans | loans	1	1
Recorded Investment	$ 4	$ 8
Extension of term | Consumer and other:
Troubled debt restructurings
Number of Loans | loans	1	1
Recorded Investment	$ 368	$ 378
Interest rate concession | Commercial real estate:
Troubled debt restructurings
Number of Loans | securities	1	1
Recorded Investment	$ 51	$ 52
Combination of extension of term and interest rate concession | Commercial real estate:
Troubled debt restructurings
Number of Loans | loans	14	16
Recorded Investment	$ 5,627	$ 6,056
Combination of extension of term and interest rate concession | Commercial and industrial
Troubled debt restructurings
Number of Loans | loans	10	10
Recorded Investment	$ 7,053	$ 7,058
Combination of extension of term and interest rate concession | Consumer and other:
Troubled debt restructurings
Number of Loans | loans	1	1
Recorded Investment	$ 7	$ 8

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