Fair Value Measurement (Schedule Of Fair Value Assets And Liabilities Not Measured At Fair Value By Level) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 148,851	$ 223,532
Securities held to maturity	4,189	4,541
Loans held for sale, at fair value	133,100	320,132
Non-covered loans and leases, net	6,663,186	6,681,080
Covered loans and leases, net	449,860	477,078
Restricted equity securities	32,783	33,443
FDIC indemnification asset	46,046	52,798	78,417	91,089
Deposits	9,071,655	9,379,275
Securities sold under agreements to repurchase	142,810	137,075
Term debt	253,080	253,605
Junior subordinated debentures, at amortized cost	102,141	110,985
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for sale, at fair value	133,100	320,132
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	718,188	543,787
Securities held to maturity	3,183	4,732
Non-covered loans and leases, net	6,641,666	6,652,179
Covered loans and leases, net	512,780	543,628
Restricted equity securities	32,783	33,443
Bank owned life insurance assets	94,637	93,831
FDIC indemnification asset	17,895	18,714
Visa Class B common stock	31,805	28,385
Securities sold under agreements to repurchase	142,810	137,075
Term debt	286,585	289,404
Junior subordinated debentures, at amortized cost	70,649	78,529
Estimated Fair Value [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	718,188	543,787
Securities held to maturity	0	0
Non-covered loans and leases, net	0	0
Covered loans and leases, net	0	0
Restricted equity securities	32,783	33,443
Bank owned life insurance assets	94,637	93,831
FDIC indemnification asset	0	0
Visa Class B common stock	0	0
Securities sold under agreements to repurchase	0	0
Term debt	0	0
Junior subordinated debentures, at amortized cost	0	0
Estimated Fair Value [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Securities held to maturity	0	0
Non-covered loans and leases, net	0	0
Covered loans and leases, net	0	0
Restricted equity securities	0	0
Bank owned life insurance assets	0	0
FDIC indemnification asset	0	0
Visa Class B common stock	0	0
Securities sold under agreements to repurchase	142,810	137,075
Term debt	286,585	289,404
Junior subordinated debentures, at amortized cost	0	0
Estimated Fair Value [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Securities held to maturity	3,183	4,732
Non-covered loans and leases, net	6,641,666	6,652,179
Covered loans and leases, net	512,780	543,628
Restricted equity securities	0	0
Bank owned life insurance assets	0	0
FDIC indemnification asset	17,895	18,714
Visa Class B common stock	31,805	28,385
Securities sold under agreements to repurchase	0	0
Term debt	0	0
Junior subordinated debentures, at amortized cost	70,649	78,529
Estimated Fair Value [Member] | Non-Maturity Deposits [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deposits	7,124,244	7,376,288
Estimated Fair Value [Member] | Non-Maturity Deposits [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deposits	7,124,244	7,376,288
Estimated Fair Value [Member] | Non-Maturity Deposits [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deposits	0	0
Estimated Fair Value [Member] | Non-Maturity Deposits [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deposits	0	0
Estimated Fair Value [Member] | Deposits with Stated Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deposits	1,962,957	2,020,358
Estimated Fair Value [Member] | Deposits with Stated Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deposits	0	0
Estimated Fair Value [Member] | Deposits with Stated Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deposits	1,962,957	2,020,358
Estimated Fair Value [Member] | Deposits with Stated Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deposits	$ 0	$ 0