Loans (Past Due, Non-Accrual And Current Non-Covered Loans By The Loan Portfolio Class) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due Loans	$ 37,585	[1]	$ 58,539	[1]
Accruing Loans 90 Days Or More Past Due	4,016	[1]	2,487	[1]
Non-Accrual Loans	124,264	[1]	105,055	[1]
Past Due Loans	165,865	[1]	166,081	[1]
Current Non-Covered Loans	9,361,932		8,843,059
Total Non-Covered Loans	9,527,797		9,009,140
Total Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due Loans	15,767	[1]	17,367	[1]
Accruing Loans 90 Days Or More Past Due	2,245	[1]	196	[1]
Non-Accrual Loans	62,060	[1]	60,293	[1]
Past Due Loans	80,072	[1]	77,856	[1]
Current Non-Covered Loans	3,905,020		3,728,628
Total Non-Covered Loans	3,985,092		3,806,484
Total Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due Loans	8,975	[1]	14,638	[1]
Accruing Loans 90 Days Or More Past Due	351	[1]	723	[1]
Non-Accrual Loans	3,910	[1]	2,547	[1]
Past Due Loans	13,236	[1]	17,908	[1]
Current Non-Covered Loans	1,365,492		1,434,252
Total Non-Covered Loans	1,378,728		1,452,160
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due Loans	4,347	[1]	13,852	[1]
Accruing Loans 90 Days Or More Past Due	657	[1]	12	[1]
Non-Accrual Loans	26,648	[1]	13,721	[1]
Past Due Loans	31,652	[1]	27,585	[1]
Current Non-Covered Loans	1,846,735		1,797,481
Total Non-Covered Loans	1,878,387		1,825,066
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due Loans	13,115	[1]	14,563	[1]
Accruing Loans 90 Days Or More Past Due	422	[1]
Non-Accrual Loans	42,186	[1]	32,981	[1]
Past Due Loans	55,723	[1]	47,544	[1]
Current Non-Covered Loans	3,518,366		3,330,708
Total Non-Covered Loans	3,574,089		3,378,252
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due Loans	2,652	[1]	2,804	[1]
Accruing Loans 90 Days Or More Past Due	1,823	[1]	196	[1]
Non-Accrual Loans	19,874	[1]	27,312	[1]
Past Due Loans	24,349	[1]	30,312	[1]
Current Non-Covered Loans	386,654		397,920
Total Non-Covered Loans	411,003		428,232
Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due Loans	8,496	[1]	12,682	[1]
Accruing Loans 90 Days Or More Past Due	763	[1]	1,556	[1]
Non-Accrual Loans	31,646	[1]	28,494	[1]
Past Due Loans	40,905	[1]	42,732	[1]
Current Non-Covered Loans	2,244,685		1,882,698
Total Non-Covered Loans	2,285,590		1,925,430
Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due Loans	989	[1]	1,045	[1]
Accruing Loans 90 Days Or More Past Due	13	[1]
Non-Accrual Loans	2,700	[1]	1,955	[1]
Past Due Loans	3,702	[1]	3,000	[1]
Current Non-Covered Loans	465,902		509,745
Total Non-Covered Loans	469,604		512,745
Automobile Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due Loans	7,794	[1]	13,328	[1]
Accruing Loans 90 Days Or More Past Due	303	[1]	686	[1]
Non-Accrual Loans	461	[1]	539	[1]
Past Due Loans	8,558	[1]	14,553	[1]
Current Non-Covered Loans	763,932		836,248
Total Non-Covered Loans	772,490		850,801
Other Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due Loans	192	[1]	265	[1]
Accruing Loans 90 Days Or More Past Due	35	[1]	37	[1]
Non-Accrual Loans	749	[1]	53	[1]
Past Due Loans	976	[1]	355	[1]
Current Non-Covered Loans	135,658		88,259
Total Non-Covered Loans	$ 136,634		$ 88,614

[1] Past due loans and non-accrual loans exclude loans that were acquired as part of the FDIC-assisted transactions. These loans are accounted for on a pooled basis.