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| | For the Three Months Ended March 31, | | | | | | For the Year Ended December 31, | |
| | 2015 | | | 2014 | | | 2014 | | | 2013 | | | 2012 | | | 2011 | | | 2010 | |
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Income before income taxes | | $ | 53,540 | | | $ | 56,017 | | | $ | 210,500 | | | $ | 212,925 | | | $ | 217,446 | | | $ | 196,411 | | | $ | 172,741 | |
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Interest expense, including interest on deposits | | | 22,191 | | | | 19,227 | | | | 81,211 | | | | 82,495 | | | | 103,168 | | | | 133,538 | | | | 186,627 | |
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Amortization of debt discount(premium) and expenses, including amounts capitalized | | | 150 | | | | 83 | | | | 334 | | | | 315 | | | | 297 | | | | 280 | | | | 265 | |
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Estimated interest component of net rental expense (1) | | | 1,487 | | | | 1,472 | | | | 5,932 | | | | 6,202 | | | | 6,301 | | | | 6,026 | | | | 5,898 | |
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Earnings | | $ | 77,368 | | | $ | 76,799 | | | $ | 297,976 | | | $ | 301,937 | | | $ | 327,212 | | | $ | 336,255 | | | $ | 365,531 | |
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Interest expense, including interest on deposits | | $ | 22,191 | | | $ | 19,227 | | | $ | 81,211 | | | $ | 82,495 | | | $ | 103,168 | | | $ | 133,538 | | | $ | 186,627 | |
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Amortization of debt discount(premium) and expenses, including amounts capitalized | | | 150 | | | | 83 | | | | 334 | | | | 315 | | | | 297 | | | | 280 | | | | 265 | |
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Estimated interest component of net rental expense (1) | | | 1,487 | | | | 1,472 | | | | 5,932 | | | | 6,202 | | | | 6,301 | | | | 6,026 | | | | 5,898 | |
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Fixed Charges, excluding preferred stock dividends and discount accretion | | | 23,828 | | | | 20,782 | | | | 87,476 | | | | 89,012 | | | | 109,766 | | | | 139,844 | | | | 192,790 | |
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Preferred stock dividends and discount accretion | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | 16,303 | |
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Interest, including amounts capitalized | | | 22,191 | | | | 19,227 | | | | 81,211 | | | | 82,495 | | | | 103,168 | | | | 133,538 | | | | 186,627 | |
Amortization of debt discount(premium) and expenses, including amounts capitalized | | | 150 | | | | 83 | | | | 334 | | | | 315 | | | | 297 | | | | 280 | | | | 265 | |
Interest factor of rental expense (1) | | | 1,487 | | | | 1,472 | | | | 5,932 | | | | 6,202 | | | | 6,301 | | | | 6,026 | | | | 5,898 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Fixed Charges, excluding preferred stock dividends and discount accretion | | | 23,828 | | | | 20,782 | | | | 87,476 | | | | 89,012 | | | | 109,766 | | | | 139,844 | | | | 192,790 | |
Preferred Dividend requirements | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | 16,303 | |
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Fixed Charges, including preferred stock dividends and discount accretion | | $ | 23,828 | | | $ | 20,782 | | | $ | 87,476 | | | $ | 89,012 | | | $ | 109,766 | | | $ | 139,844 | | | $ | 209,093 | |
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Less Interest on Deposits | | | (9,823 | ) | | | (7,897 | ) | | | (35,110 | ) | | | (36,770 | ) | | | (56,895 | ) | | | (83,083 | ) | | | (122,359 | ) |
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Fixed Charges, excluding Interest on Deposits | | | 14,005 | | | | 12,886 | | | | 52,366 | | | | 52,241 | | | | 52,871 | | | | 56,761 | | | | 86,734 | |
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Consolidated Ratio of Earnings to Fixed Charges (including interest on deposits) | | | 3.25 | | | | 3.70 | | | | 3.41 | | | | 3.39 | | | | 2.98 | | | | 2.40 | | | | 1.90 | |
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Consolidated Ratio of Earnings to Combined Fixed Charges and Preference Dividends (including interest on deposits) | | | 3.25 | | | | 3.70 | | | | 3.41 | | | | 3.39 | | | | 2.98 | | | | 2.40 | | | | 1.75 | |
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Income before income taxes | | $ | 53,540 | | | $ | 56,017 | | | $ | 210,500 | | | $ | 212,925 | | | $ | 217,446 | | | $ | 196,411 | | | $ | 172,741 | |
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Interest expense, excluding interest on deposits | | | 12,368 | | | | 11,330 | | | | 46,101 | | | | 45,725 | | | | 46,273 | | | | 50,455 | | | | 64,268 | |
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Amortization of debt discount(premium) and expenses, including amounts capitalized | | | 150 | | | | 83 | | | | 334 | | | | 315 | | | | 297 | | | | 280 | | | | 265 | |
| | | | | | | |
Estimated interest component of net rental expense (1) | | | 1,487 | | | | 1,472 | | | | 5,932 | | | | 6,202 | | | | 6,301 | | | | 6,026 | | | | 5,898 | |
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Earnings | | $ | 67,545 | | | $ | 68,903 | | | $ | 262,866 | | | $ | 265,166 | | | $ | 270,317 | | | $ | 253,172 | | | $ | 243,172 | |
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Interest expense, excluding interest on deposits | | | 12,368 | | | | 11,330 | | | | 46,101 | | | | 45,725 | | | | 46,273 | | | | 50,455 | | | | 64,268 | |
| | | | | | | |
Amortization of debt discount(premium) and expenses, including amounts capitalized | | | 150 | | | | 83 | | | | 334 | | | | 315 | | | | 297 | | | | 280 | | | | 265 | |
| | | | | | | |
Estimated interest component of net rental expense (1) | | | 1,487 | | | | 1,472 | | | | 5,932 | | | | 6,202 | | | | 6,301 | | | | 6,026 | | | | 5,898 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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Fixed Charges, excluding preferred stock dividends and discount accretion | | | 14,005 | | | | 12,886 | | | | 52,366 | | | | 52,241 | | | | 52,871 | | | | 56,761 | | | | 70,431 | |
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Preferred stock dividends and discount accretion | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | 16,303 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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Fixed Charges, including preferred stock dividends and discount accretion | | $ | 14,005 | | | $ | 12,886 | | | $ | 52,366 | | | $ | 52,241 | | | $ | 52,871 | | | $ | 56,761 | | | $ | 86,734 | |
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Consolidated Ratio of Earnings to Fixed Charges (excluding interest on deposits) | | | 4.82 | | | | 5.35 | | | | 5.02 | | | | 5.08 | | | | 5.11 | | | | 4.46 | | | | 3.45 | |
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Consolidated Ratio of Earnings to Combined Fixed Charges and Preference Dividends (excluding interest on deposits) | | | 4.82 | | | | 5.35 | | | | 5.02 | | | | 5.08 | | | | 5.11 | | | | 4.46 | | | | 2.80 | |