Covered Assets and FDIC Indemnification Asset (Reconciliation of Acquired Loan Portfolios) (Details) (USD $)	Jun. 30, 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	$ 1,716,322,000.000	$ 498,216,000.000	$ 821,972,000.000	$ 396,134,000.000
Undiscounted cash flows not expected to be collected (nonaccretable difference)	(364,926,000.000)	(124,131,000.000)	(125,774,000.000)	(115,021,000.000)
Undiscounted cash flows expected to be collected	1,351,396,000.000	374,085,000.000	696,198,000.000	281,113,000.000
Accretable yield at acquisition	(425,056,000.000)	(121,592,000.000)	(237,858,000.000)	(65,606,000.000)
Estimated fair value of loans acquired at acquisition	$ 926,340,000.000	$ 252,493,000.000	$ 458,340,000.000	$ 215,507,000.000