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Commitments, Contingencies and Derivatives (Summary of Contractual and Notional Amounts of Financial Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Home Equity Line of Credit [Member]
Financial Instruments [Line Items]
Contractual amounts of financial instrument	$ 548,784	$ 477,401
Commercial And Commercial Real Estate [Member]
Financial Instruments [Line Items]
Contractual amounts of financial instrument	67,235	49,482
Mortgage Loan Commitments [Member]
Financial Instruments [Line Items]
Contractual amounts of financial instrument	36,109	41,368
Letter of Credit [Member]
Financial Instruments [Line Items]
Contractual amounts of financial instrument	3,063	2,848
Other Commitments [Member]
Financial Instruments [Line Items]
Contractual amounts of financial instrument	2,447	523
Customer loan swaps
Financial Instruments [Line Items]
Notional amount of derivative	833,030	703,336
Forward-Starting Interest Rate Swap [Member]
Financial Instruments [Line Items]
Notional amount of derivative	25,000	50,000
Interest rate swaps
Financial Instruments [Line Items]
Notional amount of derivative	43,000	43,000
Interest Rate Lock Commitments [Member]
Financial Instruments [Line Items]
Notional amount of derivative	12,077	21,746
Forward Contracts [Member]
Financial Instruments [Line Items]
Notional amount of derivative	$ 4,315	$ 8,065

X

- Definition

Contractual Amounts of Financial Instrument

+ References

No definition available.

+ Details

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- Definition

Financial Instruments [Line Items]

+ References

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+ Details

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X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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