Allowance For Loan Losses And Credit Quality (Schedule Of Allowance For Loan Losses For Non-Covered Loans, By Loan Portfolio) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Financing Receivable, Allowance For Credit Losses [Line Items]
Balance, beginning of period	$ 193,761,000	$ 136,100,000
(Reversal of) Provision for loan losses	2,857,000	5,471,000
Transfer of balance to OREO	(5,363,000)
Loans charged-off	(15,537,000)	(3,294,000)
Recoveries	790,000	4,058,000
Balance, end of period	177,192,000	149,119,000
Allowance on loans individually evaluated for impairment	1,960,000		2,186,000
Loans, net of unearned income, Balance, end of period	7,301,114,000		7,194,276,000
Non-Covered Loans [Member]
Financing Receivable, Allowance For Credit Losses [Line Items]
Balance, beginning of period	74,861,000	62,460,000
(Reversal of) Provision for loan losses	2,110,000	3,701,000
Transfer of balance to OREO	(6,000)
Loans charged-off	(2,271,000)	(3,076,000)
Recoveries	773,000	3,731,000
Balance, end of period	75,467,000	66,816,000
Allowance on loans individually evaluated for impairment	1,960,000	1,991,000
Allowance on loans collectively evaluated for impairment	73,507,000	64,825,000
Loans, net of unearned income, Balance, end of period	6,217,644,000	4,602,035,000
Balance, end of period: Loans individually evaluated for impairment	41,852,000	42,477,000
Balance, end of period: Loans collectively evaluated for impairment	6,175,792,000	4,559,558,000
Balance, end of period: Loans acquired with deteriorated credit quality	45,125,000	616,000
Non-Covered Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance For Credit Losses [Line Items]
Balance, beginning of period	35,604,000	31,390,000
(Reversal of) Provision for loan losses	(860,000)	(948,000)
Transfer of balance to OREO	(6,000)
Loans charged-off	(803,000)	(579,000)
Recoveries	128,000	3,065,000
Balance, end of period	34,063,000	32,928,000
Allowance on loans individually evaluated for impairment	1,590,000	1,983,000
Allowance on loans collectively evaluated for impairment	32,473,000	30,945,000
Loans, net of unearned income, Balance, end of period	2,580,727,000	1,842,777,000
Balance, end of period: Loans individually evaluated for impairment	33,952,000	37,823,000
Balance, end of period: Loans collectively evaluated for impairment	2,546,775,000	1,804,954,000
Balance, end of period: Loans acquired with deteriorated credit quality	15,292,000	616,000
Non-Covered Loans [Member] | Commercial Business [Member]
Financing Receivable, Allowance For Credit Losses [Line Items]
Balance, beginning of period	25,705,000	16,473,000
(Reversal of) Provision for loan losses	2,065,000	1,964,000
Loans charged-off	(31,000)	(142,000)
Recoveries	31,000	50,000
Balance, end of period	27,770,000	18,345,000
Allowance on loans individually evaluated for impairment	202,000	8,000
Allowance on loans collectively evaluated for impairment	27,568,000	18,337,000
Loans, net of unearned income, Balance, end of period	2,020,510,000	1,412,549,000
Balance, end of period: Loans individually evaluated for impairment	6,486,000	4,654,000
Balance, end of period: Loans collectively evaluated for impairment	2,014,024,000	1,407,895,000
Balance, end of period: Loans acquired with deteriorated credit quality	24,193,000
Non-Covered Loans [Member] | Consumer [Member]
Financing Receivable, Allowance For Credit Losses [Line Items]
Balance, beginning of period	12,655,000	13,332,000
(Reversal of) Provision for loan losses	1,024,000	2,705,000
Loans charged-off	(1,274,000)	(2,294,000)
Recoveries	604,000	606,000
Balance, end of period	13,009,000	14,349,000
Allowance on loans collectively evaluated for impairment	13,009,000	14,349,000
Loans, net of unearned income, Balance, end of period	1,353,404,000	1,002,403,000
Balance, end of period: Loans individually evaluated for impairment	228,000
Balance, end of period: Loans collectively evaluated for impairment	1,353,176,000	1,002,403,000
Balance, end of period: Loans acquired with deteriorated credit quality	5,640,000
Non-Covered Loans [Member] | Mortgage [Member]
Financing Receivable, Allowance For Credit Losses [Line Items]
Balance, beginning of period	897,000	1,265,000
(Reversal of) Provision for loan losses	(119,000)	(20,000)
Loans charged-off	(163,000)	(61,000)
Recoveries	10,000	10,000
Balance, end of period	625,000	1,194,000
Allowance on loans individually evaluated for impairment	168,000
Allowance on loans collectively evaluated for impairment	457,000	1,194,000
Loans, net of unearned income, Balance, end of period	263,003,000	344,306,000
Balance, end of period: Loans individually evaluated for impairment	1,186,000
Balance, end of period: Loans collectively evaluated for impairment	261,817,000	344,306,000
Non-Covered Loans [Member] | Unallocated [Member]
Financing Receivable, Allowance For Credit Losses [Line Items]
Balance, beginning of period
(Reversal of) Provision for loan losses
Transfer of balance to OREO
Loans charged-off
Recoveries
Balance, end of period
Allowance on loans individually evaluated for impairment
Allowance on loans collectively evaluated for impairment
Loans, net of unearned income, Balance, end of period
Balance, end of period: Loans individually evaluated for impairment
Balance, end of period: Loans collectively evaluated for impairment
Balance, end of period: Loans acquired with deteriorated credit quality