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Income Taxes (Schedule of Income Tax Allocation) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Allocated to net income	$ 1,300	$ 24,189	$ 21,767	$ 14,624
Allocated to stockholders' equity, for unrealized holding gain/loss on		(2,379)	321	(685)
Allocated to stockholders' equity, for tax benefit of pension liabilities		(5)	668	(36)
Total income taxes		$ 21,805	$ 22,756	$ 13,903

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The tax effect of items occurring during the period that have been charged or credited directly to components of shareholders' equity and are not otherwise defined.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of income tax expense (benefit) for continuing operations, discontinued operations, other comprehensive income, and items charged (credited) directly to shareholders' equity.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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