Segment Information (Summary Of Financial Information By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012		Dec. 31, 2012
Segment Reporting Information [Line Items]
Interest income	$ 104,015		$ 113,594		$ 208,348		$ 229,236
Interest expense	10,122		12,582		20,266		25,869
Net interest income	93,893		101,012		188,082		203,367
Provision for non-covered loan and lease losses	2,993		6,638		9,981		9,805
Provision for covered loan and lease losses	(3,072)		1,406		(2,840)		1,375
Non-interest income	34,497		28,926		68,512		56,163
Non-interest expense	87,931		86,936		173,693		174,632
Income before income taxes	40,538		34,958		75,760		73,718
Provision for income taxes	14,285		11,681		26,146		24,938
Net income	26,253		23,277		49,614		48,780		101,891
Dividends and undistributed earnings allocated to participating securities	197	[1]	162	[1]	380	[1]	329	[1]
Net earnings available to common shareholders	26,056		23,115		49,234		48,451
Total assets	11,392,208				11,392,208				11,795,443
Total loans and leases (covered and non-covered)	7,206,176				7,206,176				7,158,158
Total deposits	8,956,325				8,956,325				9,379,275
Community Banking [Member]
Segment Reporting Information [Line Items]
Interest income	95,084		105,375		190,095		212,655
Interest expense	9,280		11,687		18,561		24,108
Net interest income	85,804		93,688		171,534		188,547
Provision for non-covered loan and lease losses	2,993		6,638		9,981		9,805
Provision for covered loan and lease losses	(3,072)		1,406		(2,840)		1,375
Non-interest income	6,142		9,470		12,638		20,373
Non-interest expense	72,861		74,234		144,319		150,992
Income before income taxes	19,164		20,880		32,712		46,748
Provision for income taxes	5,737		6,169		8,928		14,391
Net income	13,427		14,711		23,784		32,357
Dividends and undistributed earnings allocated to participating securities	197		162		380		329
Net earnings available to common shareholders	13,230		14,549		23,404		32,028
Total assets	10,599,663				10,599,663				10,984,996
Total loans and leases (covered and non-covered)	6,653,783				6,653,783				6,713,792
Total deposits	8,562,885				8,562,885				8,968,867
Wealth Management [Member]
Segment Reporting Information [Line Items]
Interest income	3,487		3,351		7,211		7,469
Interest expense	183		230		373		497
Net interest income	3,304		3,121		6,838		6,972
Provision for non-covered loan and lease losses	0		0		0		0
Provision for covered loan and lease losses	0		0		0		0
Non-interest income	3,943		3,799		7,733		6,850
Non-interest expense	4,231		3,990		8,233		7,680
Income before income taxes	3,016		2,930		6,338		6,142
Provision for income taxes	1,205		1,053		2,534		2,216
Net income	1,811		1,877		3,804		3,926
Dividends and undistributed earnings allocated to participating securities	0		0		0		0
Net earnings available to common shareholders	1,811		1,877		3,804		3,926
Total assets	109,840				109,840				90,370
Total loans and leases (covered and non-covered)	94,706				94,706				74,132
Total deposits	354,708				354,708				382,033
Home Lending [Member]
Segment Reporting Information [Line Items]
Interest income	5,444		4,868		11,042		9,112
Interest expense	659		665		1,332		1,264
Net interest income	4,785		4,203		9,710		7,848
Provision for non-covered loan and lease losses	0		0		0		0
Provision for covered loan and lease losses	0		0		0		0
Non-interest income	24,412		15,657		48,141		28,940
Non-interest expense	10,839		8,712		21,141		15,960
Income before income taxes	18,358		11,148		36,710		20,828
Provision for income taxes	7,343		4,459		14,684		8,331
Net income	11,015		6,689		22,026		12,497
Dividends and undistributed earnings allocated to participating securities	0		0		0		0
Net earnings available to common shareholders	11,015		6,689		22,026		12,497
Total assets	682,705				682,705				720,077
Total loans and leases (covered and non-covered)	457,687				457,687				370,234
Total deposits	$ 38,732				$ 38,732				$ 28,375

[1] Represents dividends paid and undistributed earnings allocated to nonvested restricted stock awards.