Allowance for Non-Covered Loan Loss and Credit Quality (Activity In The Non-Covered Allowance For Loan And Lease Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period, Allowance			$ 85,391	$ 92,968	$ 85,836		$ 83,618
Charge-offs	(6,317)	(7,644)	(19,646)	(31,937)
Recoveries	2,167	1,707	5,960	6,845
Provision	3,008	7,078	12,989	16,883
Balance, end of period, Allowance	84,694	84,759	84,694	84,759	85,836		83,618
Collectively evaluated for impairment, Allowance	83,290	83,621	83,290	83,621
Individually evaluated for impairment, Allowance	1,404	1,138	1,404	1,138
Total, Allowance for non-covered loans and leases	84,694	84,759	84,694	84,759	85,836		83,618
Collectively evaluated for impairment, Non-covered loans and leases	7,124,997	6,111,671	7,124,997	6,111,671
Individually evaluated for impairment, Non-covered loans and leases	110,118	148,854	110,118	148,854
Total, Non-covered loans and leases	7,235,115	6,260,525	7,235,115	6,260,525		6,693,603
Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period, Allowance			54,909	59,574	55,249		56,341
Charge-offs	(3,101)	(4,892)	(6,595)	(18,007)
Recoveries	880	1,020	2,830	2,327
Provision	565	2,779	2,449	11,354
Balance, end of period, Allowance	53,593	55,248	53,593	55,248	55,249		56,341
Collectively evaluated for impairment, Allowance	52,199	54,115	52,199	54,115
Individually evaluated for impairment, Allowance	1,394	1,133	1,394	1,133
Total, Allowance for non-covered loans and leases	53,593	55,248	53,593	55,248	55,249		56,341
Collectively evaluated for impairment, Non-covered loans and leases	4,235,408	3,816,106	4,235,408	3,816,106
Individually evaluated for impairment, Non-covered loans and leases	97,382	129,690	97,382	129,690
Total, Non-covered loans and leases	4,332,790	3,945,796	4,332,790	3,945,796
Commercial [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period, Allowance			22,925	20,485	21,587		19,587
Charge-offs	(1,754)	(1,782)	(9,541)	(8,741)
Recoveries	1,101	409	2,554	3,856
Provision	2,346	2,540	7,342	5,154
Balance, end of period, Allowance	23,280	20,754	23,280	20,754	21,587		19,587
Collectively evaluated for impairment, Allowance	23,270	20,754	23,270	20,754
Individually evaluated for impairment, Allowance	10	0	10	0
Total, Allowance for non-covered loans and leases	23,280	20,754	23,280	20,754	21,587		19,587
Collectively evaluated for impairment, Non-covered loans and leases	2,039,566	1,602,735	2,039,566	1,602,735
Individually evaluated for impairment, Non-covered loans and leases	12,736	18,371	12,736	18,371
Total, Non-covered loans and leases	2,052,302	1,621,106	2,052,302	1,621,106
Residential [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period, Allowance			6,925	7,625	8,250		6,652
Charge-offs	(1,181)	(516)	(2,813)	(4,030)
Recoveries	41	171	221	338
Provision	(68)	1,381	2,709	3,755
Balance, end of period, Allowance	7,042	7,688	7,042	7,688	8,250		6,652
Collectively evaluated for impairment, Allowance	7,042	7,683	7,042	7,683
Individually evaluated for impairment, Allowance	0	5	0	5
Total, Allowance for non-covered loans and leases	7,042	7,688	7,042	7,688	8,250		6,652
Collectively evaluated for impairment, Non-covered loans and leases	806,402	654,956	806,402	654,956
Individually evaluated for impairment, Non-covered loans and leases	0	793	0	793
Total, Non-covered loans and leases	806,402	655,749	806,402	655,749
Consumer & Other [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period, Allowance			632	867	750		1,038
Charge-offs	(281)	(454)	(697)	(1,159)
Recoveries	145	107	355	324
Provision	165	331	489	990
Balance, end of period, Allowance	779	1,022	779	1,022	750		1,038
Collectively evaluated for impairment, Allowance	779	1,022	779	1,022
Individually evaluated for impairment, Allowance	0	0	0	0
Total, Allowance for non-covered loans and leases	779	1,022	779	1,022	750		1,038
Collectively evaluated for impairment, Non-covered loans and leases	43,621	37,874	43,621	37,874
Individually evaluated for impairment, Non-covered loans and leases	0	0	0	0
Total, Non-covered loans and leases	43,621	37,874	43,621	37,874
Unallocated [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period, Allowance			0	4,417	0		0
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	0	47	0	(4,370)
Balance, end of period, Allowance	0	47	0	47	0		0
Collectively evaluated for impairment, Allowance	0	47	0	47
Individually evaluated for impairment, Allowance	0	0	0	0
Total, Allowance for non-covered loans and leases	$ 0	$ 47	$ 0	$ 47	$ 0		$ 0