Covered Assets and Indemnification Asset (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012 risk_rating	Mar. 31, 2013 Evergreen Bank [Member]	Dec. 31, 2012 Evergreen Bank [Member]	Mar. 31, 2013 Rainier Pacific Bank [Member]	Dec. 31, 2012 Rainier Pacific Bank [Member]	Mar. 31, 2013 Nevada Security Bank [Member]	Dec. 31, 2012 Nevada Security Bank [Member]
Business Acquisition [Line Items]
Outstanding unpaid principal of covered loans			$ 125.9	$ 137.7	$ 281.7	$ 297.0	$ 178.0	$ 198.4
Recaptured provision on covered loans	$ 1.7	$ 1.9
Range of risk rating for loans and leases, minimum		1
Range of risk rating for loans and leases, maximum		10