Consolidated Condensed Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Assets:
Cash and due from banks	$ 132,561	$ 137,770
Money market instruments	75,501	19,716
Cash and cash equivalents	208,062	157,486
Investment securities
Securities available-for-sale, at fair value (amortized cost of $846,719 and $801,147 at June 30, 2012 and December 31, 2011)	867,147	820,645
Securities held-to-maturity, at amortized cost (fair value of $768,076 and $834,574 at June 30, 2012 and December 31, 2011)	755,222	820,224
Other investment securities	66,285	67,604
Total investment securities	1,688,654	1,708,473
Loans	4,386,851	4,317,099
Allowance for loan losses	(58,696)	(68,444)
Net loans	4,328,155	4,248,655
Bank owned life insurance	158,696	154,567
Goodwill and other intangible assets	72,949	74,843
Bank premises and equipment, net	52,261	53,741
Other real estate owned	38,424	42,272
Accrued interest receivable	20,219	19,697
Mortgage loan servicing rights	8,809	9,301
Other	129,345	120,748
Assets held for sale		382,462
Total assets	6,705,574	6,972,245
Liabilities and Stockholders' Equity:
Noninterest bearing	1,034,952	995,733
Interest bearing	3,788,023	3,469,381
Total deposits	4,822,975	4,465,114
Short-term borrowings	240,602	263,594
Long-term debt	806,287	823,182
Subordinated debentures and notes	105,250	75,250
Accrued interest payable	4,660	4,916
Other	65,177	61,639
Liabilities held for sale		536,186
Total liabilities	6,044,951	6,229,881
COMMITMENTS AND CONTINGENCIES
Stockholders' equity:
Preferred stock (200,000 shares authorized; 0 shares at June 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; 16,151,007 shares issued at June 30, 2012 and 16,151,021 shares issued at December 31, 2011)	302,655	301,202
Common stock warrants		4,297
Retained earnings	442,531	424,557
Treasury stock (745,109 shares at June 30, 2012 and at December 31, 2011)	(77,007)	(77,007)
Accumulated other comprehensive (loss), net of taxes	(7,556)	(8,831)
Total stockholders' equity	660,623	742,364
Total liabilities and stockholders' equity	$ 6,705,574	$ 6,972,245