Revenue Recognition (Summary of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue from Contract with Customer [Abstract]
Percentage of total revenue excluded from adoption of 606	85.00%	84.00%	86.00%	85.00%
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 9,412	$ 9,421	$ 27,926	$ 27,303
Total out-of-scope non-interest income	6,504	5,691	15,134	15,093
Total non-interest income	15,916	15,112	43,060	42,396
Wealth Management Fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	4,570	4,592	13,572	13,314
Banking service charges and other fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	4,842	4,829	14,354	13,989
Service charges on deposit accounts [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	3,356	3,399	9,910	9,713
Debit card and ATM fees [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 1,486	$ 1,430	$ 4,444	$ 4,276

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The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.

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Amount of revenue earned, classified as other, excluding interest income.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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