The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Goodwill and Other Intangibles (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	May 19, 2017
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangibles	$ 3,589		$ 3,589		$ 3,939
Goodwill	27,618		27,618		27,618
Amortization Of Other Intangible Assets	239	$ 55	350	$ 88
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangibles	$ 3,397		$ 3,397		$ 3,723
Northwest Bank Branches [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill						$ 14,985
Northwest Bank Branches [Member] \| Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangibles						$ 4,000