Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
ASSETS
Cash and due from banks	$ 177,026		$ 171,221
Interest-earning deposits with banks	71,575		16,949
Total cash and cash equivalents	248,601		188,170
Securities available for sale at fair value (amortized cost of $1,981,977 and $2,087,069, respectively)	2,007,159		2,098,257
Federal Home Loan Bank stock at cost	33,004		33,365
Loans held for sale	3,545		1,116
Loans, net of unearned income of ($53,867) and ($59,374), respectively	5,450,895		5,445,378
Loans and Leases Receivable, Allowance	70,234		69,569
Loans, net	5,380,661		5,375,809
FDIC loss sharing asset	14,644		15,174
Interest receivable	29,088		27,802
Premises and equipment, net	172,958		172,090
Other real estate owned	23,299		22,190
Goodwill	382,537		382,537
Other intangible assets, net	28,642		30,459
Other assets	228,764		231,877
Total Assets	8,552,902		8,578,846
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing	3,260,376		2,651,373
Interest-bearing	3,814,589		4,273,349
Total deposits	7,074,965		6,924,722
Federal Home Loan Bank advances	36,559		216,568
Securities sold under agreements to repurchase	96,852		105,080
Other Borrowings	0		8,248
Other liabilities	100,083		96,053
Total liabilities	7,308,459		7,350,671
Commitments and contingent liabilities
Shareholders' equity:
Preferred Stock, Shares Authorized	2,000		2,000
Preferred Stock, Shares Issued	9		9
Preferred Stock, Value, Issued	2,217		2,217
Authorized shares	63,033		63,033
Common Stock Shares Issued And Outstanding	57,699		57,437
Common Stock (no par value)	986,348		985,839
Retained earnings	241,592		234,498
Accumulated other comprehensive income	14,286	[1]	5,621	[1]
Total shareholders' equity	1,244,443		1,228,175
Total Liabilities and Shareholders' Equity	$ 8,552,902		$ 8,578,846

[1] All amounts are net of tax. Amounts in parenthesis indicate debits.