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Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Troubled Debt Restructurings) (Details) $ in Thousands	Dec. 31, 2016 USD ($) loans	Dec. 31, 2015 USD ($) loans
Troubled debt restructurings:
Number of Loans | loans	30	42
Pre-Modification Recorded Investment	$ 18,897	$ 20,721
Post-Modification Recorded Investment	$ 13,560	$ 17,890
Commercial real estate — owner occupied
Troubled debt restructurings:
Number of Loans | loans	3	3
Pre-Modification Recorded Investment	$ 1,065	$ 1,209
Post-Modification Recorded Investment	$ 930	$ 1,188
Commercial real estate — non-owner occupied
Troubled debt restructurings:
Number of Loans | loans	1	5
Pre-Modification Recorded Investment	$ 158	$ 1,150
Post-Modification Recorded Investment	$ 39	$ 904
Land development
Troubled debt restructurings:
Number of Loans | loans	1	2
Pre-Modification Recorded Investment	$ 5,745	$ 5,853
Post-Modification Recorded Investment	$ 3,440	$ 4,393
Construction
Troubled debt restructurings:
Number of Loans | loans	2	1
Pre-Modification Recorded Investment	$ 331	$ 181
Post-Modification Recorded Investment	$ 314	$ 200
Multi-family
Troubled debt restructurings:
Number of Loans | loans	0	1
Pre-Modification Recorded Investment	$ 0	$ 184
Post-Modification Recorded Investment	$ 0	$ 2
1-4 family
Troubled debt restructurings:
Number of Loans | loans	11	15
Pre-Modification Recorded Investment	$ 1,391	$ 2,035
Post-Modification Recorded Investment	$ 1,393	$ 1,869
Commercial and industrial
Troubled debt restructurings:
Number of Loans | loans	10	10
Pre-Modification Recorded Investment	$ 8,094	$ 7,572
Post-Modification Recorded Investment	$ 7,058	$ 8,330
Home equity and second mortgages
Troubled debt restructurings:
Number of Loans | loans	1	4
Pre-Modification Recorded Investment	$ 37	$ 461
Post-Modification Recorded Investment	$ 8	$ 349
Other
Troubled debt restructurings:
Number of Loans | loans	1	1
Pre-Modification Recorded Investment	$ 2,076	$ 2,076
Post-Modification Recorded Investment	$ 378	$ 655

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