Other Comprehensive Income (Loss) (Components Of Accumulated Other Comprehensive Income (Loss), Net Of Tax, In The Consolidated Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Other Comprehensive Income (Loss) [Abstract]
URA(D) on securities, net of deferred taxes, Temporary	$ 172,029	$ 146,727
URA(D) on securities, net of deferred taxes, Non-credit, OTTI	318	413
Total unrealized appreciation (depreciation) on investments, net of deferred taxes	172,347	147,140
Foreign currency translation adjustments, net of deferred taxes	95,922	83,185
Pension adjustments, net of deferred taxes	(52,369)	(55,535)
Accumulated other comprehensive income (loss)	$ 215,900	$ 174,790