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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	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	$ 15,814		$ 16,029
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	4,005		4,396
Allowance for loan and lease losses	19,819	$ 20,449	20,425	$ 20,932	$ 18,638	$ 18,763
Financing Receivable, Collectively Evaluated for Impairment	1,694,784		1,593,576
Financing Receivable, Individually Evaluated for Impairment	25,935		25,308
Loans and Leases Receivable, Gross	1,720,799		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	80		173
Total commercial real estate
Financing Receivable, Allowance for Credit Losses
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	10,460		10,987
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	809		675
Allowance for loan and lease losses	11,269	11,205	11,662	11,147	9,990	10,131
Financing Receivable, Collectively Evaluated for Impairment	1,142,156		1,086,254
Financing Receivable, Individually Evaluated for Impairment	7,342		7,914
Loans and Leases Receivable, Gross	1,149,577		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	79		171
Total commercial and Industrial
Financing Receivable, Allowance for Credit Losses
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	4,708		4,369
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	3,184		3,710
Allowance for loan and lease losses	7,892	8,485	8,079	9,237	8,151	8,225
Financing Receivable, Collectively Evaluated for Impairment	522,403		478,385
Financing Receivable, Individually Evaluated for Impairment	18,409		17,104
Loans and Leases Receivable, Gross	540,813		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	1		2
Total consumer and other
Financing Receivable, Allowance for Credit Losses
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	646		673
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	12		11
Allowance for loan and lease losses	658	$ 759	684	$ 548	$ 497	$ 407
Financing Receivable, Collectively Evaluated for Impairment	30,225		28,937
Financing Receivable, Individually Evaluated for Impairment	184		290
Loans and Leases Receivable, Gross	30,409		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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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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