Segment Information (Summary Of Financial Information By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended				12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Segment Reporting Information [Line Items]
Interest income	$ 239,523	$ 115,960		$ 580,370		$ 324,308
Interest expense	13,807	9,151		34,557		29,417
Net interest income	225,716	106,809		545,813		294,891
Provision for non-covered loan and lease losses	14,431	3,008		35,230		12,989
Provision for covered loan and lease losses	(98)	(1,904)		(230)		(4,744)
Non-interest income	61,924	26,144		129,460		94,656
Non-interest expense	182,558	95,604		493,207		269,297
Income before income taxes	90,749	36,245		147,066		112,005
Provision for income taxes	31,760	12,768		52,092		38,914
Net income	58,989	23,477		94,974		73,091		98,361
Dividends and undistributed earnings allocated to participating securities	142	196	[1]	338	[1]	576	[1]
Net earnings available to common shareholders	58,847	23,281		94,636		72,515
Total assets	22,488,059			22,488,059				11,636,112
Total loans and leases (covered and non-covered)	15,259,201			15,259,201				7,718,395
Total deposits	16,727,610			16,727,610				9,117,660
Community Banking [Member]
Segment Reporting Information [Line Items]
Interest income	219,268	110,594		536,922		307,900
Interest expense	12,003	8,537		30,858		27,471
Net interest income	207,265	102,057		506,064		280,429
Provision for non-covered loan and lease losses	14,431	3,008		35,230		12,989
Provision for covered loan and lease losses	(98)	(1,904)		(230)		(4,744)
Non-interest income	30,198	11,040		62,663		31,411
Non-interest expense	160,559	85,859		445,189		238,411
Income before income taxes	62,571	26,134		88,538		65,184
Provision for income taxes	21,898	8,724		30,090		20,186
Net income	40,673	17,410		58,448		44,998
Dividends and undistributed earnings allocated to participating securities	142	196		338		576
Net earnings available to common shareholders	40,531	17,214		58,110		44,422
Total assets	20,078,945			20,078,945				10,949,050
Total loans and leases (covered and non-covered)	13,211,330			13,211,330				7,186,366
Total deposits	16,660,992			16,660,992				9,090,959
Home Lending [Member]
Segment Reporting Information [Line Items]
Interest income	20,255	5,366		43,448		16,408
Interest expense	1,804	614		3,699		1,946
Net interest income	18,451	4,752		39,749		14,462
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	31,726	15,104		66,797		63,245
Non-interest expense	21,999	9,745		48,018		30,886
Income before income taxes	28,178	10,111		58,528		46,821
Provision for income taxes	9,862	4,044		22,002		18,728
Net income	18,316	6,067		36,526		28,093
Dividends and undistributed earnings allocated to participating securities	0	0		0		0
Net earnings available to common shareholders	18,316	6,067		36,526		28,093
Total assets	2,409,114			2,409,114				687,062
Total loans and leases (covered and non-covered)	2,047,871			2,047,871				532,029
Total deposits	$ 66,618			$ 66,618				$ 26,701

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