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Parent Company Statements - Statements of Income (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Income: |  |  |
Interest and dividends | $ 285,735 | $ 331,880 | $ 345,517
Expense: |  |  |
Federal income tax benefit | (25,701) | (34,415) | (16,636)
Net income | 78,630 | 82,140 | 58,101
Parent Company |  |  |
Income: |  |  |
Dividends from subsidiaries | 197,000 | 105,000 | 80,000
Interest and dividends | 10,027 | 5,643 | 4,789
Other | 232 | 385 | 411
Total income | 207,259 | 111,028 | 85,200
Expense: |  |  |
Other, net | 11,869 | 10,639 | 12,632
Total expense | 11,869 | 10,639 | 12,632
Income before federal taxes and equity in undistributed losses of subsidiaries | 195,390 | 100,389 | 72,568
Federal income tax benefit | 1,806 | 3,016 | 5,993
Income before equity in undistributed losses of subsidiaries | 197,196 | 103,405 | 78,561
Equity in undistributed losses of subsidiaries | (118,566) | (21,265) | (20,460)
Net income | $ 78,630 | $ 82,140 | $ 58,101

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