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Summary Of Significant Accounting Policies (Schedule Of Supplemental Disclosures Of Cash Flow Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Summary Of Significant Accounting Policies [Abstract]
Interest	$ 13,049	$ 13,297	$ 15,005
Income taxes	4,122	1,944	$ 1,699
Issuance of common stock for Ascyrus Acquisition	20,000
Assets acquired in exchange for operating leases	$ 1,864	$ 2,604

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Noncash or Part Noncash Acquisition, Assets Acquired In Exchange For Operating Leases

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities.

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