| Non-GAAP Disclosure Reconciliations (continued) 21 Net Non-interest Expense to Average Assets Calculation (in thousands) 2006 2007 2008 2009 2010 YTD 2011 Non-interest expense 152,218 $ 191,506 $ 183,390 $ 223,750 $ 258,776 $ 133,592 $ Adjustment for FDIC special assessment - - - 3,850 - - Adjustment for contributions to MB Financial Charitable Foundation - 4,500 - - - - Adjustment for executive separation agreement expense - 5,908 - - - - Unamortized issuance costs related to redemption of trust preferred securities - 1,914 - - - - Adjustment for impairment charges - - - 4,000 - 1,000 Adjustment for increase (decrease) in market value of assets held in trust for deferred compensation 493 609 (1,657) 710 562 345 Non-interest expense - as adjusted 151,725 178,575 185,047 215,190 258,214 132,247 Other income 64,376 83,528 80,393 127,154 185,756 58,288 Less net gains (losses) on securities available for sale (445) (3,744) 1,130 14,029 18,648 229 Less net gains (losses) on sale of other assets 860 10,097 (1,104) (13) 630 370 Less net gain on sale of loans held for sale - - - - - 1,790 Less net gains (losses) on other real estate owned 222 140 455 (429) (9,284) (5,017) Less acquisition related gains - - - 28,547 62,649 - Less increase (decrease) in market value of assets held in trust for deferred compensation 493 609 (1,657) 710 562 345 Other income - as adjusted 63,246 76,426 81,569 84,310 112,551 60,571 Net non-interest expense 88,479 $ 102,149 $ 103,478 $ 130,880 $ 145,663 $ 71,676 $ Average assets 6,602,070 7,910,610 8,240,344 9,777,288 10,506,028 10,082,121 Net non-interest expense to average assets 1.34% 1.29% 1.26% 1.34% 1.39% 1.43% (1) (1) Annualized |