Business Combinations (Schedule of Net Assets (Liabilities) Received from the FDIC and the Estimated Fair Value Adjustments) (Details) (USD $)	6 Months Ended					0 Months Ended							0 Months Ended							0 Months Ended
	Jun. 30, 2010	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Mar. 31, 2010	Jan. 22, 2010 Evergreen Bank [Member]	Jan. 22, 2010 Evergreen Bank [Member] Fair Value Adjustments [Member]	Jun. 30, 2011 Evergreen Bank [Member]	Mar. 31, 2011 Evergreen Bank [Member]	Dec. 31, 2010 Evergreen Bank [Member]	Jun. 30, 2010 Evergreen Bank [Member]	Mar. 31, 2010 Evergreen Bank [Member]	Feb. 26, 2010 Rainier Pacific Bank [Member]	Feb. 26, 2010 Rainier Pacific Bank [Member] Fair Value Adjustments [Member]	Jun. 30, 2011 Rainier Pacific Bank [Member]	Mar. 31, 2011 Rainier Pacific Bank [Member]	Dec. 31, 2010 Rainier Pacific Bank [Member]	Jun. 30, 2010 Rainier Pacific Bank [Member]	Mar. 31, 2010 Rainier Pacific Bank [Member]	Jun. 18, 2010 Nevada Security Bank [Member]	Jun. 18, 2010 Nevada Security Bank [Member] Fair Value Adjustments [Member]	Jun. 30, 2011 Nevada Security Bank [Member]	Mar. 31, 2011 Nevada Security Bank [Member]	Dec. 31, 2010 Nevada Security Bank [Member]	Jun. 30, 2010 Nevada Security Bank [Member]
Cost basis net assets (liabilities)							$ 58,811,000	$ 58,800,000						$ (50,295,000)	$ 50,300,000						$ 53,629,000	$ 53,600,000
Cash payment received from (paid to) the FDIC														59,351,000	59,400,000						(29,950,000)	30,000,000
Loans		5,637,758,000		5,557,066,000			(117,449,000)							(103,137,000)							(112,975,000)
Other Real Estate Owned							(2,422,000)							(6,581,000)							(17,939,000)
Other intangible assets							440,000							6,253,000							322,000
FDIC indemnification asset	225,354,000.000	116,928,000.000	131,872,000.000	146,413,000.000	141,955,000.000		71,755,000	36,118,000.000	40,379,000.000	40,606,000.000	72,068,000.000	71,696,000.000		76,603,000	35,999,000.000	37,875,000.000	43,726,000.000	54,598,000.000	70,259,000.000		99,160,000	44,811,000.000	53,618,000.000	62,081,000.000	98,688,000.000
Deposits		(9,146,412,000)		(9,433,805,000)			(1,023,000)							(1,828,000)							(1,950,000)
Term debt							(2,496,000)							(13,035,000)
Other assets		205,883,000		242,465,000			(1,179,000)							(3,139,000)							(690,000)
Bargain purchase gain on acquisition	(6,437,000)					(6,437,000)	6,437,000
(goodwill)														$ (35,808,000)	$ 27,500,000						$ (10,393,000)	$ 36,500,000