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Significant Accounting Policies (Schedule Of Supplemental Cash Flow Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Significant Accounting Policies [Abstract]
Income taxes	$ 65	$ 201
Interest	2,250	2,721
Increase in other liabilities for purchase of securities settling after quarter end	$ 0	$ 3,100

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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