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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	Dec. 31, 2016 USD ($) securities loans	Dec. 31, 2015 USD ($) securities loans
Troubled debt restructurings:
Number of Loans | loans	30	42
Post-Modification Recorded Investment	$ 13,560	$ 17,890
Commercial and industrial
Troubled debt restructurings:
Number of Loans | loans	10	10
Post-Modification Recorded Investment	$ 7,058	$ 8,330
Combination of extension of term and interest rate conession | Commercial real estate:
Troubled debt restructurings:
Number of Loans | loans	16	25
Post-Modification Recorded Investment	$ 6,056	$ 8,477
Combination of extension of term and interest rate conession | Commercial and industrial
Troubled debt restructurings:
Number of Loans | loans	10	10
Post-Modification Recorded Investment	$ 7,058	$ 8,330
Combination of extension of term and interest rate conession | Consumer and other:
Troubled debt restructurings:
Number of Loans | loans	1	4
Post-Modification Recorded Investment	$ 8	$ 349
Interest rate concession | Commercial real estate:
Troubled debt restructurings:
Number of Loans | securities	1	1
Post-Modification Recorded Investment	$ 52	$ 55
Extension of term | Commercial real estate:
Troubled debt restructurings:
Number of Loans | loans	1	1
Post-Modification Recorded Investment	$ 8	$ 24
Extension of term | Consumer and other:
Troubled debt restructurings:
Number of Loans | loans	1	1
Post-Modification Recorded Investment	$ 378	$ 655

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