Allowance for Non-Covered Loan and Lease Loss and Credit Quality (Non-Covered Non-Accrual Loans And Loans Past Due) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 10,252		$ 17,751
60-89 Days Past Due	5,038		6,040
Greater Than 90 Days and Accruing	3,430		4,232
Total Past Due	18,720		28,023
Nonaccrual	31,891		66,736
Current	7,303,792	[1]	6,586,321	[1]
Total, Non-covered loans and leases	7,354,403		6,681,080
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total, Non-covered loans and leases	4,325,024		4,183,254
Non-owner Occupied Term [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	3,618		5,132
60-89 Days Past Due	352		1,097
Greater Than 90 Days and Accruing	0		0
Total Past Due	3,970		6,229
Nonaccrual	9,193		33,797
Current	2,315,097	[1]	2,276,883	[1]
Total, Non-covered loans and leases	2,328,260		2,316,909
Owner Occupied Term [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1,320		2,615
60-89 Days Past Due	340		1,687
Greater Than 90 Days and Accruing	610		0
Total Past Due	2,270		4,302
Nonaccrual	6,204		8,448
Current	1,251,109	[1]	1,264,090	[1]
Total, Non-covered loans and leases	1,259,583		1,276,840
Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0		0
60-89 Days Past Due	0		0
Greater Than 90 Days and Accruing	0		0
Total Past Due	0		0
Nonaccrual	935		1,045
Current	402,602	[1]	330,690	[1]
Total, Non-covered loans and leases	403,537		331,735
Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0		283
60-89 Days Past Due	0		0
Greater Than 90 Days and Accruing	0		0
Total Past Due	0		283
Nonaccrual	0		4,177
Current	245,231	[1]	196,171	[1]
Total, Non-covered loans and leases	245,231		200,631
Residential Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	0		479
60-89 Days Past Due	0		0
Greater Than 90 Days and Accruing	0		0
Total Past Due	0		479
Nonaccrual	2,801		5,132
Current	85,612	[1]	51,528	[1]
Total, Non-covered loans and leases	88,413		57,139
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total, Non-covered loans and leases	2,119,796		1,719,139
Term [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	901		3,009
60-89 Days Past Due	1,436		746
Greater Than 90 Days and Accruing	0		81
Total Past Due	2,337		3,836
Nonaccrual	8,723		7,040
Current	759,785	[1]	786,185	[1]
Total, Non-covered loans and leases	770,845		797,061
LOC & Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	619		1,647
60-89 Days Past Due	224		1,503
Greater Than 90 Days and Accruing	0		0
Total Past Due	843		3,150
Nonaccrual	1,222		7,027
Current	985,295	[1]	880,631	[1]
Total, Non-covered loans and leases	987,360		890,808
Leases and Equipment Finance [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	2,202		0
60-89 Days Past Due	1,706		0
Greater Than 90 Days and Accruing	517		0
Total Past Due	4,425		0
Nonaccrual	2,813		0
Current	354,353	[1]	31,270	[1]
Total, Non-covered loans and leases	361,591		31,270
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total, Non-covered loans and leases	861,470		741,100
Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1,050		2,906
60-89 Days Past Due	342		602
Greater Than 90 Days and Accruing	2,070		3,303
Total Past Due	3,462		6,811
Nonaccrual	0		0
Current	593,739	[1]	471,652	[1]
Total, Non-covered loans and leases	597,201		478,463
Home Equity Loans & Lines [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	473		1,398
60-89 Days Past Due	563		214
Greater Than 90 Days and Accruing	160		758
Total Past Due	1,196		2,370
Nonaccrual	0		49
Current	263,073	[1]	260,218	[1]
Total, Non-covered loans and leases	264,269		262,637
Consumer & Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	69		282
60-89 Days Past Due	75		191
Greater Than 90 Days and Accruing	73		90
Total Past Due	217		563
Nonaccrual	0		21
Current	47,896	[1]	37,003	[1]
Total, Non-covered loans and leases	$ 48,113		$ 37,587

[1] Other includes non-covered loans accounted for under ASC 310-30.