Consolidated Condensed Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Assets:
Cash and due from banks	$ 114,186	$ 137,770
Money market instruments	167,109	19,716
Cash and cash equivalents	281,295	157,486
Investment securities:
Securities available-for-sale, at fair value (amortized cost of $1,013,114 and $801,147 at September 30, 2012 and December 31, 2011)	1,034,870	820,645
Securities held-to-maturity, at amortized cost (fair value of $565,599 and $834,574 at September 30, 2012 and December 31, 2011)	552,604	820,224
Other investment securities	65,907	67,604
Total investment securities	1,653,381	1,708,473
Loans	4,400,510	4,317,099
Allowance for loan losses	(55,565)	(68,444)
Net loans	4,344,945	4,248,655
Bank owned life insurance	159,880	154,567
Goodwill and other intangible assets	72,810	74,843
Bank premises and equipment, net	54,416	53,741
Other real estate owned	35,633	42,272
Accrued interest receivable	20,135	19,697
Mortgage loan servicing rights	8,346	9,301
Other	122,097	120,748
Assets held for sale		382,462
Total assets	6,752,938	6,972,245
Liabilities and Stockholders' Equity:
Noninterest bearing	1,043,460	995,733
Interest bearing	3,749,617	3,469,381
Total deposits	4,793,077	4,465,114
Short-term borrowings	275,908	263,594
Long-term debt	806,273	823,182
Subordinated debentures and notes	105,250	75,250
Accrued interest payable	4,559	4,916
Other	108,744	61,639
Liabilities held for sale		536,186
Total liabilities	6,093,811	6,229,881
COMMITMENTS AND CONTINGENCIES
Stockholders' equity:
Preferred stock (200,000 shares authorized; 0 shares at September 30, 2012 and 100,000 shares at December 31, 2011 with $1,000 per share liquidation preference)		98,146
Common stock (No par value; 20,000,000 shares authorized; 16,150, 996 shares issued at September 30, 2012 and 16,151,021 shares issued at December 31, 2011)	302,654	301,202
Common stock warrants		4,297
Retained earnings	440,030	424,557
Treasury stock (745,109 shares at September 30, 2012 and at December 31, 2011)	(77,007)	(77,007)
Accumulated other comprehensive (loss), net of taxes	(6,550)	(8,831)
Total stockholders' equity	659,127	742,364
Total liabilities and stockholders' equity	$ 6,752,938	$ 6,972,245