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Mortgage Banking (Additional Information) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Servicing Assets at Fair Value [Line Items]
Gain (Loss) on Sale of Mortgage Loans		$ 5,451,000	$ 6,256,000	$ 6,201,000
Receivables Held-for-sale, Amount		4,300,000	8,100,000
Unrealized Gain (Loss) on Derivatives		89,000	37,000
Unrealized gain (loss) on loans held for sale		52,000	326,000	(422,000)
Servicing Asset at Amortized Cost		$ 831,000	$ 1,025,000	1,210,000	$ 2,161,000
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed		11.50%	14.00%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate		11.10%	11.20%
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed		$ 62,000
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed		121,000
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Discount Rate		56,000
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Discount Rate		108,000
Capitalized servicing right fees upon sale(1)	[1]	0	$ 22,000	9,000
Fixed Rate Residential Mortgage [Member]
Servicing Assets at Fair Value [Line Items]
Mortgage Loans on Real Estate, Cost of Mortgages Sold		205,900,000	218,600,000	232,200,000
Forward Contracts [Member]
Servicing Assets at Fair Value [Line Items]
Unrealized Gain (Loss) on Derivatives		(127,000)	(136,000)	278,000
Servicing Assets [Member]
Servicing Assets at Fair Value [Line Items]
Mortgage loans serviced during period, value		235,400,000	275,200,000
Fees and Commissions, Mortgage Banking and Servicing		$ 949,000,000	$ 1,000,000	1,100,000
Sub-Serviced Loans [Member]
Servicing Assets at Fair Value [Line Items]
Fees and Commissions, Mortgage Banking and Servicing				$ 1,700,000
[1] Reported within mortgage banking income, net on the Company's consolidated statements of income.

X

- Definition

Value of mortgage loans serviced during period that are not included in the Consolidated Statements of Condition

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Unrealized gain (loss) on loans held for sale

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Income from mortgage banking activities (fees and commissions) and servicing real estate mortgages, credit cards, and other financial assets held by others net of any related impairment of capitalized service costs. Also includes any premiums received in lieu of regular servicing fees on such loans only as earned over the life of the loans.

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The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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The carrying amount of mortgage loans on real estate that were sold during the reporting period.

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The face amount of all receivables that will be sold to other entities, including trade and loan receivables.

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The hypothetical financial impact of a 10 percent adverse change of the discount rate on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

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Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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Amount of additions from purchases, assumption or transfer to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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Estimated rate of prepayments of principal on servicing assets and servicing liabilities.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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