Derivative Instruments and Hedging Activities (Fair Values of Derivative Instruments on the Balance Sheet) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Gross notional amount	$ 100,000	$ 100,000
Derivatives Designated as Hedging Instruments [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives	2
Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Gross notional amount	438,345	353,145
Derivatives Not Designated as Hedging Instruments [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives	20,212	6,551
Derivatives Not Designated as Hedging Instruments [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives	20,593	6,745
Cash Flow Hedging [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Gross notional amount	100,000	100,000
Cash Flow Hedging [Member] \| Derivatives Designated as Hedging Instruments [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives	2
Interest Rate Swap [Member] \| Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Gross notional amount	351,033	272,962
Interest Rate Swap [Member] \| Derivatives Not Designated as Hedging Instruments [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives	19,921	6,419
Interest Rate Swap [Member] \| Derivatives Not Designated as Hedging Instruments [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives	20,431	6,720
Credit Contract [Member] \| Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Gross notional amount	66,767	68,324
Credit Contract [Member] \| Derivatives Not Designated as Hedging Instruments [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives	32	13
Credit Contract [Member] \| Derivatives Not Designated as Hedging Instruments [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives	42	18
Mortgage Banking [Member] \| Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Gross notional amount	20,545	11,859
Mortgage Banking [Member] \| Derivatives Not Designated as Hedging Instruments [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives	259	119
Mortgage Banking [Member] \| Derivatives Not Designated as Hedging Instruments [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives	$ 120	$ 7

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

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Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Details

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- Details

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