Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
ASSETS
Cash and due from banks	$ 157,817		$ 165,030
Interest-earning deposits with banks	105,631		14,531
Total cash and cash equivalents	263,448		179,561
Securities available for sale at fair value (amortized cost of $1,609,784 and $1,680,491, respectively)	1,611,411		1,664,111
Federal Home Loan Bank stock at cost	31,592		32,529
Loans held for sale	949		735
Loans, net	4,755,151		4,444,842
FDIC loss sharing asset	23,492		39,846
Interest receivable	25,294		22,206
Premises and equipment, net	152,311		154,732
Other real estate owned ($11,589 and $12,093 covered by FDIC loss share, respectively)	21,904		35,927
Goodwill	343,952		343,952
Other intangible assets, net	21,336		25,852
Other assets	215,241		217,289
Total Assets	7,466,081		7,161,582
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing	2,352,210		2,171,703
Interest-bearing	3,892,191		3,787,772
Total deposits	6,244,401		5,959,475
Federal Home Loan Bank advances	6,578		36,606
Securities sold under agreements to repurchase	25,000		25,000
Other liabilities	93,891		87,252
Total liabilities	6,369,870		6,108,333
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	52,649		51,265
Common Stock (no par value)	862,912		860,562
Retained earnings	231,577		202,514
Accumulated other comprehensive income	(495)	[1]	(12,044)	[1]
Total shareholders' equity	1,096,211		1,053,249
Total Liabilities and Shareholders' Equity	7,466,081		7,161,582
Noncovered Loans [Member]
ASSETS
Loans held for sale	949		735
Loans, excluding covered loans, net of unearned income of ($53,076) and ($68,282), respectively	4,579,178		4,219,451
Loans and Leases Receivable, Allowance	49,938		52,280
Loans, net	4,529,240		4,167,171
Other real estate owned ($11,589 and $12,093 covered by FDIC loss share, respectively)	10,315		23,834
Covered Loans [Member]
ASSETS
Loans and Leases Receivable, Allowance	17,933		20,174
Loans, net	225,911		277,671
Other real estate owned ($11,589 and $12,093 covered by FDIC loss share, respectively)	$ 11,589		$ 12,093

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