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Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Allowance for Loan and Lease Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Allowance for credit losses roll-forward
Allowance for loan and lease losses - begin	$ 21,677	$ 18,154	$ 20,912	$ 16,316
Charge-offs	(3,230)	(1,656)	(7,196)	(3,250)
Recoveries	5	32	508	177
Net (charge-offs) recoveries	(3,225)	(1,624)	(6,688)	(3,073)
Provision for credit loss	1,471	3,537	5,699	6,824
Allowance for loan and lease losses - end	19,923	20,067	19,923	20,067
Commercial real estate:
Allowance for credit losses roll-forward
Allowance for loan and lease losses - begin	12,003	11,436	12,384	11,220
Charge-offs	(8)	(259)	(126)	(1,194)
Recoveries	2	31	152	170
Net (charge-offs) recoveries	(6)	(228)	26	(1,024)
Provision for credit loss	(2,462)	1,607	(2,875)	2,619
Allowance for loan and lease losses - end	9,535	12,815	9,535	12,815
Commercial and industrial loans and leases
Allowance for credit losses roll-forward
Allowance for loan and lease losses - begin	9,090	6,017	7,970	4,387
Charge-offs	(3,217)	(1,396)	(6,978)	(2,048)
Recoveries	2	0	314	2
Net (charge-offs) recoveries	(3,215)	(1,396)	(6,664)	(2,046)
Provision for credit loss	3,968	2,051	8,537	4,331
Allowance for loan and lease losses - end	9,843	6,672	9,843	6,672
Consumer and other:
Allowance for credit losses roll-forward
Allowance for loan and lease losses - begin	584	701	558	709
Charge-offs	(5)	(1)	(92)	(8)
Recoveries	1	1	42	5
Net (charge-offs) recoveries	(4)	0	(50)	(3)
Provision for credit loss	(35)	(121)	37	(126)
Allowance for loan and lease losses - end	$ 545	$ 580	$ 545	$ 580

X

- Definition

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(4)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

+ References

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-Publisher FASB
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Amount, after recoveries, of loans and leases that have been written-off.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

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Amount of expense related to estimated loss from loan and lease transactions.

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