Loans And Leases (Loans Acquired By Loan Class) (Details) (USD $) In Thousands	Sep. 30, 2011		Dec. 31, 2010		Sep. 30, 2010		Jan. 21, 2011 United Western Bank [Member]	Jan. 21, 2011 United Western Bank [Member] Commercial Loans [Member]	Jan. 21, 2011 United Western Bank [Member] Commercial Loans [Member] Construction And Land Development [Member]	Jan. 21, 2011 United Western Bank [Member] Commercial Loans [Member] Commercial Mortgage [Member]	Jan. 21, 2011 United Western Bank [Member] Commercial Loans [Member] Other Commercial Real Estate [Member]	Jan. 21, 2011 United Western Bank [Member] Commercial Loans [Member] Commercial And Industrial [Member]	Jan. 21, 2011 United Western Bank [Member] Commercial Loans [Member] Lease Financing [Member]	Jan. 21, 2011 United Western Bank [Member] Non-Commercial Loans [Member]	Jan. 21, 2011 United Western Bank [Member] Non-Commercial Loans [Member] Construction And Land Development [Member]	Jan. 21, 2011 United Western Bank [Member] Non-Commercial Loans [Member] Residential Mortgage [Member]	Jan. 21, 2011 United Western Bank [Member] Non-Commercial Loans [Member] Revolving Mortgage [Member]	Jan. 21, 2011 United Western Bank [Member] Non-Commercial Loans [Member] Consumer [Member]	Jul. 08, 2011 Colorado Capital Bank [Member]	Jul. 08, 2011 Colorado Capital Bank [Member] Commercial Loans [Member]	Jul. 08, 2011 Colorado Capital Bank [Member] Commercial Loans [Member] Construction And Land Development [Member]	Jul. 08, 2011 Colorado Capital Bank [Member] Commercial Loans [Member] Commercial Mortgage [Member]	Jul. 08, 2011 Colorado Capital Bank [Member] Commercial Loans [Member] Other Commercial Real Estate [Member]	Jul. 08, 2011 Colorado Capital Bank [Member] Commercial Loans [Member] Commercial And Industrial [Member]	Jul. 08, 2011 Colorado Capital Bank [Member] Non-Commercial Loans [Member]	Jul. 08, 2011 Colorado Capital Bank [Member] Non-Commercial Loans [Member] Construction And Land Development [Member]	Jul. 08, 2011 Colorado Capital Bank [Member] Non-Commercial Loans [Member] Residential Mortgage [Member]	Jul. 08, 2011 Colorado Capital Bank [Member] Non-Commercial Loans [Member] Revolving Mortgage [Member]	Jul. 08, 2011 Colorado Capital Bank [Member] Non-Commercial Loans [Member] Consumer [Member]	Sep. 30, 2011 Commercial Loans [Member]	Dec. 31, 2010 Commercial Loans [Member]	Sep. 30, 2010 Commercial Loans [Member]	Sep. 30, 2011 Commercial Loans [Member] Construction And Land Development [Member]	Dec. 31, 2010 Commercial Loans [Member] Construction And Land Development [Member]	Sep. 30, 2010 Commercial Loans [Member] Construction And Land Development [Member]	Sep. 30, 2011 Commercial Loans [Member] Commercial Mortgage [Member]	Dec. 31, 2010 Commercial Loans [Member] Commercial Mortgage [Member]	Sep. 30, 2010 Commercial Loans [Member] Commercial Mortgage [Member]	Sep. 30, 2011 Commercial Loans [Member] Other Commercial Real Estate [Member]	Dec. 31, 2010 Commercial Loans [Member] Other Commercial Real Estate [Member]	Sep. 30, 2010 Commercial Loans [Member] Other Commercial Real Estate [Member]	Sep. 30, 2011 Commercial Loans [Member] Commercial And Industrial [Member]	Dec. 31, 2010 Commercial Loans [Member] Commercial And Industrial [Member]	Sep. 30, 2010 Commercial Loans [Member] Commercial And Industrial [Member]	Sep. 30, 2011 Commercial Loans [Member] Lease Financing [Member]	Dec. 31, 2010 Commercial Loans [Member] Lease Financing [Member]	Sep. 30, 2010 Commercial Loans [Member] Lease Financing [Member]	Sep. 30, 2011 Commercial Loans [Member] Other Loans [Member]	Dec. 31, 2010 Commercial Loans [Member] Other Loans [Member]	Sep. 30, 2010 Commercial Loans [Member] Other Loans [Member]	Sep. 30, 2011 Non-Commercial Loans [Member]	Dec. 31, 2010 Non-Commercial Loans [Member]	Sep. 30, 2010 Non-Commercial Loans [Member]	Sep. 30, 2011 Non-Commercial Loans [Member] Construction And Land Development [Member]	Dec. 31, 2010 Non-Commercial Loans [Member] Construction And Land Development [Member]	Sep. 30, 2010 Non-Commercial Loans [Member] Construction And Land Development [Member]	Sep. 30, 2011 Non-Commercial Loans [Member] Residential Mortgage [Member]	Dec. 31, 2010 Non-Commercial Loans [Member] Residential Mortgage [Member]	Sep. 30, 2010 Non-Commercial Loans [Member] Residential Mortgage [Member]	Sep. 30, 2011 Non-Commercial Loans [Member] Revolving Mortgage [Member]	Dec. 31, 2010 Non-Commercial Loans [Member] Revolving Mortgage [Member]	Sep. 30, 2010 Non-Commercial Loans [Member] Revolving Mortgage [Member]	Sep. 30, 2011 Non-Commercial Loans [Member] Consumer [Member]	Dec. 31, 2010 Non-Commercial Loans [Member] Consumer [Member]	Sep. 30, 2010 Non-Commercial Loans [Member] Consumer [Member]
Total covered loans acquired	$ 2,557,450	[1]	$ 2,007,452	[2]	$ 2,222,660	[1]	$ 759,351	$ 441,931	$ 52,889	$ 304,769	$ 8,434	$ 75,523	$ 316	$ 317,420	$ 39,827	$ 260,389	$ 12,073	$ 5,131	$ 322,162	$ 189,033	$ 113,519	$ 31,370	$ 4,931	$ 39,213	$ 133,129	$ 33,461	$ 64,742	$ 29,332	$ 5,594	$ 2,013,636	$ 1,802,132	$ 1,987,592	$ 405,658	$ 368,420	$ 448,799	$ 1,310,083	$ 1,089,064	$ 1,131,183	$ 159,007	$ 210,661	$ 220,024	$ 137,253	$ 132,477	$ 182,905	$ 162	$ 0	$ 0	$ 1,473	$ 1,510	$ 4,681	$ 543,814	$ 205,320	$ 235,068	$ 115,126	$ 105,805	$ 122,192	$ 380,405	$ 74,495	$ 82,769	$ 39,709	$ 17,866	$ 23,139	$ 8,574	$ 7,154	$ 6,968

[1] Unaudited

[2] Derived from 2010 Annual Report on Form 10-K.