Loans and Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009	Dec. 31, 2008
Total non-covered and covered loans outstanding
Commercial loans	$ 5,107,747		$ 4,527,497
Mortgage loans	413,664		403,843
Installment loans	1,263,665		1,308,860
Home equity loans	743,982		749,378
Credit card loans	146,356		149,506
Leases	73,530		63,004
Total noncovered loans	7,748,944	[1]	7,202,088	[1]
Allowance for noncovered loan losses	(107,699)		(114,690)		(115,092)	(103,757)
Net noncovered loans	7,641,245		7,087,398
Covered loans	1,497,140	[2]	1,976,754	[2]
Less allowance for loan losses	(36,417)		(13,733)
Net covered loans	1,460,723		1,963,021
Net loans	$ 9,101,968		$ 9,050,419

[1] Includes acquired, non-covered loans of $113.2 million and $265.5 million as of December 31, 2011 and 2010, respectively.

[2] Includes loss share receivable of $205.7 million and $288.6 million as of December 31, 2011 and 2010, respectively.