Covered Assets And Indemnification Asset (Reconciliation Of Acquired Loan Portfolios) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Jan. 22, 2010 Evergreen Bank [Member]	Feb. 26, 2010 Rainier Pacific Bank [Member]	Jun. 18, 2010 Nevada Security Bank [Member]
Undiscounted contractual cash flows	$ 1,716,322	$ 498,216	$ 821,972	$ 396,134
Undiscounted cash flows not expected to be collected (nonaccretable difference)	(364,926)	(124,131)	(125,774)	(115,021)
Undiscounted cash flows expected to be collected	1,351,396	374,085	696,198	281,113
Accretable yield at acquisition	(425,056)	(121,592)	(237,858)	(65,606)
Estimated fair value of loans acquired at acquisition	$ 926,340	$ 252,493	$ 458,340	$ 215,507