v3.2.0.727
Other Comprehensive Income (Loss) (Change In Accumulated Other Comprehensive Income By Component, Net Of Taxes And Noncontrolling Interest) (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Accumulated Other Comprehensive Income [Line Items]    
Accumulated other comprehensive income, beginning balance $ 1,704,557 $ 1,089,805
Other comprehensive income (loss) before reclassifications (120,374) 363,195
Amounts reclassified from accumulated other comprehensive income (13,105) (10,118)
Total other comprehensive income (loss) (133,479) 353,077
Accumulated other comprehensive income, ending balance 1,571,078 1,442,882
Unrealized Holding Gains On Available-For-Sale Securities [Member]    
Accumulated Other Comprehensive Income [Line Items]    
Accumulated other comprehensive income, beginning balance 1,793,254 1,131,507
Other comprehensive income (loss) before reclassifications (109,001) 355,623
Amounts reclassified from accumulated other comprehensive income (14,037) (10,762)
Total other comprehensive income (loss) (123,038) 344,861
Accumulated other comprehensive income, ending balance 1,670,216 1,476,368
Foreign Currency [Member]    
Accumulated Other Comprehensive Income [Line Items]    
Accumulated other comprehensive income, beginning balance (43,491) (11,246)
Other comprehensive income (loss) before reclassifications (11,373) 7,572
Amounts reclassified from accumulated other comprehensive income 0 0
Total other comprehensive income (loss) (11,373) 7,572
Accumulated other comprehensive income, ending balance (54,864) (3,674)
Net Actuarial Pension Loss [Member]    
Accumulated Other Comprehensive Income [Line Items]    
Accumulated other comprehensive income, beginning balance (45,206) (30,456)
Other comprehensive income (loss) before reclassifications 0 0
Amounts reclassified from accumulated other comprehensive income 932 644
Total other comprehensive income (loss) 932 644
Accumulated other comprehensive income, ending balance $ (44,274) $ (29,812)