Segment Information (Summary Of Financial Information By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Interest income	$ 118,538	$ 115,960	$ 104,015	$ 104,333	$ 112,741	$ 114,108	$ 113,594	$ 115,642	$ 442,846		$ 456,085		$ 501,753
Interest expense	8,464	9,151	10,122	10,144	10,912	12,068	12,582	13,287	37,881		48,849		73,301
Net interest income	110,074	106,809	93,893	94,189	101,829	102,040	101,012	102,355	404,965		407,236		428,452
Provision for non-covered loan and lease losses	3,840	3,008	2,993	6,988	4,913	7,078	6,638	3,167	16,829		21,796		46,220
Recapture of provision for covered loan losses									(6,113)		7,405		16,141
Non-interest income	26,785	26,144	34,497	34,015	46,987	33,679	28,926	27,237	121,441		136,829		84,118
Non-interest expense	95,364	95,604	87,931	85,762	98,046	86,974	86,936	87,696	364,661		359,652		338,971
Income before income taxes	39,024	36,245	40,538	35,222	42,754	38,740	34,958	38,760	151,029		155,212		111,238
Provision for income taxes	13,754	12,768	14,285	11,861	14,796	13,587	11,681	13,257	52,668		53,321		36,742
Net income	25,270	23,477	26,253	23,361	27,958	25,153	23,277	25,503	98,361		101,891		74,496
Dividends and undistributed earnings allocated to participating securities	212	196	197	183	183	170	162	167	788	[1]	682	[1]	356	[1]
Net earnings available to common shareholders	25,058	23,281	26,056	23,178	27,775	24,983	23,115	25,336	97,573		101,209		74,140
Total assets	11,636,112				11,795,443				11,636,112		11,795,443		11,562,858
Total loans and leases (covered and non-covered)	7,718,395				7,158,158				7,718,395		7,158,158		6,510,549
Total deposits	9,117,660				9,379,275				9,117,660		9,379,275		9,236,690
Community Banking [Member]
Segment Reporting Information [Line Items]
Interest income									406,099		420,622		474,167
Interest expense									34,636		45,240		68,751
Net interest income									371,463		375,382		405,416
Provision for non-covered loan and lease losses									16,829		21,796		46,220
Recapture of provision for covered loan losses									(6,113)		7,405		16,141
Non-interest income									26,440		38,272		43,282
Non-interest expense									308,894		307,089		302,883
Income before income taxes									78,293		77,364		83,454
Provision for income taxes									23,544		22,202		26,023
Net income									54,749		55,162		57,431
Dividends and undistributed earnings allocated to participating securities									788		682		356
Net earnings available to common shareholders									53,961		54,480		57,075
Total assets	10,822,990				10,984,996				10,822,990		10,984,996		11,086,493
Total loans and leases (covered and non-covered)	7,076,279				6,713,792				7,076,279		6,713,792		6,171,368
Total deposits	8,734,175				8,968,867				8,734,175		8,968,867		8,830,353
Wealth Management [Member]
Segment Reporting Information [Line Items]
Interest income									14,755		15,192		13,362
Interest expense									731		865		2,067
Net interest income									14,024		14,327		11,295
Provision for non-covered loan and lease losses									0		0		0
Recapture of provision for covered loan losses									0		0		0
Non-interest income									15,662		13,759		13,963
Non-interest expense									16,849		15,108		15,630
Income before income taxes									12,837		12,978		9,628
Provision for income taxes									5,164		5,171		3,457
Net income									7,673		7,807		6,171
Dividends and undistributed earnings allocated to participating securities									0		0		0
Net earnings available to common shareholders									7,673		7,807		6,171
Total assets	126,060				90,370				126,060		90,370		53,044
Total loans and leases (covered and non-covered)	110,087				74,132				110,087		74,132		38,810
Total deposits	356,784				382,033				356,784		382,033		390,992
Home Lending [Member]
Segment Reporting Information [Line Items]
Interest income									21,992		20,271		14,224
Interest expense									2,514		2,744		2,483
Net interest income									19,478		17,527		11,741
Provision for non-covered loan and lease losses									0		0		0
Recapture of provision for covered loan losses									0		0		0
Non-interest income									79,339		84,798		26,873
Non-interest expense									38,918		37,455		20,458
Income before income taxes									59,899		64,870		18,156
Provision for income taxes									23,960		25,948		7,262
Net income									35,939		38,922		10,894
Dividends and undistributed earnings allocated to participating securities									0		0		0
Net earnings available to common shareholders									35,939		38,922		10,894
Total assets	687,062				720,077				687,062		720,077		423,321
Total loans and leases (covered and non-covered)	532,029				370,234				532,029		370,234		300,371
Total deposits	$ 26,701				$ 28,375				$ 26,701		$ 28,375		$ 15,345

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