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Parent Company Statements (Statements Of Income) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Interest and dividends | $ 331,880 | $ 345,517 | $ 367,690
Federal income tax benefit | 34,415 | 16,636 | 22,943
Net income | 82,140 | 58,101 | 74,192
Parent Company [Member] |  |  |
Dividends from subsidiaries | 105,000 | 80,000 | 75,000
Interest and dividends | 4,669 | 4,789 | 4,715
Other | (2,653) | 411 | 489
Total income | 107,016 | 85,200 | 80,204
Other, net | 11,721 | 12,632 | 10,322
Total expense | 11,721 | 12,632 | 10,322
Income before federal taxes and equity in undistributed losses of subsidiaries | 95,295 | 72,568 | 69,882
Federal income tax benefit | 4,799 | 5,993 | 6,210
Income before equity in undistributed losses of subsidiaries | 100,094 | 78,561 | 76,092
Equity in undistributed losses of subsidiaries | (17,954) | (20,460) | (1,900)
Net income | $ 82,140 | $ 58,101 | $ 74,192

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