Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Interest Income:
Loans and leases, including fees	$ 160,344	$ 148,355
Securities:
Taxable	10,260	12,792
Tax-exempt	3,594	3,762
Dividends	1,166	998
Short-term investments	36	30
Total interest income	175,400	165,937
Deposits:
Interest-bearing demand and savings	4,901	6,047
Time	11,232	12,026
Federal Home Loan Bank short-term borrowings	3,371	2,900
Other short-term borrowings	2,153	2,122
Federal Home Loan Bank long-term borrowings	301	58
Other long-term debt	4,236	8,661
Total interest expense	26,194	31,814
Net interest income	149,206	134,123
Provision for loan and lease losses	12,000	19,000
Net interest income, after provision for loan and lease losses	137,206	115,123
Noninterest Income:
Service charges on deposit accounts	8,672	7,674
Vehicle origination and servicing fees	3,354	1,924
Wealth management commissions and fees	12,390	11,602
Commissions on property and casualty insurance sales	4,542	5,058
Other commissions and fees	5,237	4,643
Income from bank-owned life insurance	1,850	1,472
Mortgage banking revenue	4,110	3,513
Net realized gain on sales of securities	406	385
Total other-than-temporary impairment, net of recoveries	(680)	(2,706)
Portion recognized in other comprehensive income (before taxes)	292	2,562
Net impairment losses recognized in earnings	(388)	(144)
Other	2,471	3,388
Total noninterest income	42,644	39,515
Net Income	$ 42,399	$ 23,473
Earnings per common share:
Basic	$ 0.23	$ 0.14
Diluted	$ 0.23	$ 0.14
Cash dividends per common share		$ 0.03
Average common shares outstanding:
Basic	186,607	171,326
Diluted	187,442	171,973