Covered Assets and Indemnification Asset (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012 risk_rating	Sep. 30, 2013 Evergreen Bank [Member]	Dec. 31, 2012 Evergreen Bank [Member]	Sep. 30, 2013 Rainier Pacific Bank [Member]	Dec. 31, 2012 Rainier Pacific Bank [Member]	Sep. 30, 2013 Nevada Security Bank [Member]	Dec. 31, 2012 Nevada Security Bank [Member]
Business Acquisition [Line Items]
Outstanding unpaid principal of covered loans					$ 105.6	$ 137.7	$ 247.3	$ 297.0	$ 155.8	$ 198.4
Recaptured provision on covered loans	$ 2.4	$ 0.5	$ 7.9	$ 3.7
Range of risk rating for loans and leases, minimum				1
Range of risk rating for loans and leases, maximum				10