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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 by Type of Methodology) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	$ 15,851		$ 16,029
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	4,319		4,396
Allowance for loan and lease losses	20,170	$ 19,819	20,425	$ 20,455	$ 20,932	$ 18,763
Financing Receivable, Collectively Evaluated for Impairment	1,698,234		1,593,576
Financing Receivable, Individually Evaluated for Impairment	22,921		25,308
Loans and Leases Receivable, Gross	1,721,169		1,619,057
Loans acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	14		173
Total commercial real estate
Financing Receivable, Allowance for Credit Losses
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	10,385		10,987
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	753		675
Allowance for loan and lease losses	11,138	11,269	11,662	11,693	11,147	10,131
Financing Receivable, Collectively Evaluated for Impairment	1,142,813		1,086,254
Financing Receivable, Individually Evaluated for Impairment	6,170		7,914
Loans and Leases Receivable, Gross	1,148,997		1,094,339
Total commercial real estate | Loans acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	14		171
Total commercial and Industrial
Financing Receivable, Allowance for Credit Losses
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	4,850		4,369
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	3,561		3,710
Allowance for loan and lease losses	8,411	7,892	8,079	7,884	9,237	8,225
Financing Receivable, Collectively Evaluated for Impairment	526,069		478,385
Financing Receivable, Individually Evaluated for Impairment	16,590		17,104
Loans and Leases Receivable, Gross	542,659		495,491
Total commercial and Industrial | Loans acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	0		2
Total consumer and other
Financing Receivable, Allowance for Credit Losses
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	616		673
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	5		11
Allowance for loan and lease losses	621	$ 658	684	$ 878	$ 548	$ 407
Financing Receivable, Collectively Evaluated for Impairment	29,352		28,937
Financing Receivable, Individually Evaluated for Impairment	161		290
Loans and Leases Receivable, Gross	29,513		29,227
Total consumer and other | Loans acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	$ 0		$ 0

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- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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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.

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