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Other Benefit Plans (Schedule of Employees Eligible to Participate in Employee Stock Purchase Plan) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Pension Plans And Defined Benefit Postretirement Plans Disclosure [Abstract]
ESPP shares purchased	4,132	3,578	4,465
Average purchase price per share	$ 28.716	$ 29.027	$ 18.520

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- Definition

The weighted average of per share prices paid for shares purchased on the open market for issuance to employees under the plan.

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-Publisher FASB
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Number of shares issued during the period as a result of an employee stock purchase plan.

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